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artiq
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remove WRPLL

This commit is contained in:
Sebastien Bourdeauducq 2021-02-17 16:09:51 +08:00
parent 5c461443e4
commit 7b72c9e915
16 changed files with 50 additions and 2292 deletions
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2
artiq/firmware/libboard_artiq/lib.rs
View File

@ -22,8 +22,6 @@ pub mod rpc_queue;
#[cfg(has_si5324)]
pub mod si5324;
#[cfg(has_wrpll)]
pub mod wrpll;
#[cfg(has_hmc830_7043)]
pub mod hmc830_7043;

538
artiq/firmware/libboard_artiq/wrpll.rs
View File

@ -1,538 +0,0 @@
use board_misoc::{csr, clock};
mod i2c {
use board_misoc::{csr, clock};
#[derive(Debug, Clone, Copy)]
pub enum Dcxo {
Main,
Helper
}
fn half_period() { clock::spin_us(1) }
const SDA_MASK: u8 = 2;
const SCL_MASK: u8 = 1;
fn sda_i(dcxo: Dcxo) -> bool {
let reg = match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_in_read() },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_in_read() },
};
reg & SDA_MASK != 0
}
fn sda_oe(dcxo: Dcxo, oe: bool) {
let reg = match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_oe_read() },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_oe_read() },
};
let reg = if oe { reg | SDA_MASK } else { reg & !SDA_MASK };
match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_oe_write(reg) },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_oe_write(reg) }
}
}
fn sda_o(dcxo: Dcxo, o: bool) {
let reg = match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_out_read() },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_out_read() },
};
let reg = if o { reg | SDA_MASK } else { reg & !SDA_MASK };
match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_out_write(reg) },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_out_write(reg) }
}
}
fn scl_oe(dcxo: Dcxo, oe: bool) {
let reg = match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_oe_read() },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_oe_read() },
};
let reg = if oe { reg | SCL_MASK } else { reg & !SCL_MASK };
match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_oe_write(reg) },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_oe_write(reg) }
}
}
fn scl_o(dcxo: Dcxo, o: bool) {
let reg = match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_out_read() },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_out_read() },
};
let reg = if o { reg | SCL_MASK } else { reg & !SCL_MASK };
match dcxo {
Dcxo::Main => unsafe { csr::wrpll::main_dcxo_gpio_out_write(reg) },
Dcxo::Helper => unsafe { csr::wrpll::helper_dcxo_gpio_out_write(reg) }
}
}
pub fn init(dcxo: Dcxo) -> Result<(), &'static str> {
// Set SCL as output, and high level
scl_o(dcxo, true);
scl_oe(dcxo, true);
// Prepare a zero level on SDA so that sda_oe pulls it down
sda_o(dcxo, false);
// Release SDA
sda_oe(dcxo, false);
// Check the I2C bus is ready
half_period();
half_period();
if !sda_i(dcxo) {
// Try toggling SCL a few times
for _bit in 0..8 {
scl_o(dcxo, false);
half_period();
scl_o(dcxo, true);
half_period();
}
}
if !sda_i(dcxo) {
return Err("SDA is stuck low and doesn't get unstuck");
}
Ok(())
}
pub fn start(dcxo: Dcxo) {
// Set SCL high then SDA low
scl_o(dcxo, true);
half_period();
sda_oe(dcxo, true);
half_period();
}
pub fn stop(dcxo: Dcxo) {
// First, make sure SCL is low, so that the target releases the SDA line
scl_o(dcxo, false);
half_period();
// Set SCL high then SDA high
sda_oe(dcxo, true);
scl_o(dcxo, true);
half_period();
sda_oe(dcxo, false);
half_period();
}
pub fn write(dcxo: Dcxo, data: u8) -> bool {
// MSB first
for bit in (0..8).rev() {
// Set SCL low and set our bit on SDA
scl_o(dcxo, false);
sda_oe(dcxo, data & (1 << bit) == 0);
half_period();
// Set SCL high ; data is shifted on the rising edge of SCL
scl_o(dcxo, true);
half_period();
}
// Check ack
// Set SCL low, then release SDA so that the I2C target can respond
scl_o(dcxo, false);
half_period();
sda_oe(dcxo, false);
// Set SCL high and check for ack
scl_o(dcxo, true);
half_period();
// returns true if acked (I2C target pulled SDA low)
!sda_i(dcxo)
}
pub fn read(dcxo: Dcxo, ack: bool) -> u8 {
// Set SCL low first, otherwise setting SDA as input may cause a transition
// on SDA with SCL high which will be interpreted as START/STOP condition.
scl_o(dcxo, false);
half_period(); // make sure SCL has settled low
sda_oe(dcxo, false);
let mut data: u8 = 0;
// MSB first
for bit in (0..8).rev() {
scl_o(dcxo, false);
half_period();
// Set SCL high and shift data
scl_o(dcxo, true);
half_period();
if sda_i(dcxo) { data |= 1 << bit }
}
// Send ack
// Set SCL low and pull SDA low when acking
scl_o(dcxo, false);
if ack { sda_oe(dcxo, true) }
half_period();
// then set SCL high
scl_o(dcxo, true);
half_period();
data
}
}
mod si549 {
use board_misoc::clock;
use super::i2c;
#[cfg(any(soc_platform = "metlino", soc_platform = "sayma_amc", soc_platform = "sayma_rtm"))]
pub const ADDRESS: u8 = 0x55;
#[cfg(soc_platform = "kasli")]
pub const ADDRESS: u8 = 0x67;
pub fn write(dcxo: i2c::Dcxo, reg: u8, val: u8) -> Result<(), &'static str> {
i2c::start(dcxo);
if !i2c::write(dcxo, ADDRESS << 1) {
return Err("Si549 failed to ack write address")
}
if !i2c::write(dcxo, reg) {
return Err("Si549 failed to ack register")
}
if !i2c::write(dcxo, val) {
return Err("Si549 failed to ack value")
}
i2c::stop(dcxo);
Ok(())
}
pub fn write_no_ack_value(dcxo: i2c::Dcxo, reg: u8, val: u8) -> Result<(), &'static str> {
i2c::start(dcxo);
if !i2c::write(dcxo, ADDRESS << 1) {
return Err("Si549 failed to ack write address")
}
if !i2c::write(dcxo, reg) {
return Err("Si549 failed to ack register")
}
i2c::write(dcxo, val);
i2c::stop(dcxo);
Ok(())
}
pub fn read(dcxo: i2c::Dcxo, reg: u8) -> Result<u8, &'static str> {
i2c::start(dcxo);
if !i2c::write(dcxo, ADDRESS << 1) {
return Err("Si549 failed to ack write address")
}
if !i2c::write(dcxo, reg) {
return Err("Si549 failed to ack register")
}
i2c::stop(dcxo);
i2c::start(dcxo);
if !i2c::write(dcxo, (ADDRESS << 1) | 1) {
return Err("Si549 failed to ack read address")
}
let val = i2c::read(dcxo, false);
i2c::stop(dcxo);
Ok(val)
}
pub fn program(dcxo: i2c::Dcxo, hsdiv: u16, lsdiv: u8, fbdiv: u64) -> Result<(), &'static str> {
i2c::init(dcxo)?;
write(dcxo, 255, 0x00)?; // PAGE
write_no_ack_value(dcxo, 7, 0x80)?; // RESET
clock::spin_us(100_000); // required? not specified in datasheet.
write(dcxo, 255, 0x00)?; // PAGE
write(dcxo, 69, 0x00)?; // Disable FCAL override.
// Note: Value 0x00 from Table 5.6 is inconsistent with Table 5.7,
// which shows bit 0 as reserved and =1.
write(dcxo, 17, 0x00)?; // Synchronously disable output
// The Si549 has no ID register, so we check that it responds correctly
// by writing values to a RAM-like register and reading them back.
for test_value in 0..255 {
write(dcxo, 23, test_value)?;
let readback = read(dcxo, 23)?;
if readback != test_value {
return Err("Si549 detection failed");
}
}
write(dcxo, 23, hsdiv as u8)?;
write(dcxo, 24, (hsdiv >> 8) as u8 | (lsdiv << 4))?;
write(dcxo, 26, fbdiv as u8)?;
write(dcxo, 27, (fbdiv >> 8) as u8)?;
write(dcxo, 28, (fbdiv >> 16) as u8)?;
write(dcxo, 29, (fbdiv >> 24) as u8)?;
write(dcxo, 30, (fbdiv >> 32) as u8)?;
write(dcxo, 31, (fbdiv >> 40) as u8)?;
write(dcxo, 7, 0x08)?; // Start FCAL
write(dcxo, 17, 0x01)?; // Synchronously enable output
Ok(())
}
// Si549 digital frequency trim ("all-digital PLL" register)
// ∆ f_out = adpll * 0.0001164e-6 (0.1164 ppb/lsb)
// max trim range is +- 950 ppm
pub fn set_adpll(dcxo: i2c::Dcxo, adpll: i32) -> Result<(), &'static str> {
write(dcxo, 231, adpll as u8)?;
write(dcxo, 232, (adpll >> 8) as u8)?;
write(dcxo, 233, (adpll >> 16) as u8)?;
clock::spin_us(100);
Ok(())
}
pub fn get_adpll(dcxo: i2c::Dcxo) -> Result<i32, &'static str> {
let b1 = read(dcxo, 231)? as i32;
let b2 = read(dcxo, 232)? as i32;
let b3 = read(dcxo, 233)? as i8 as i32;
Ok(b3 << 16 | b2 << 8 | b1)
}
}
// to do: load from gateware config
const DDMTD_COUNTER_N: u32 = 15;
const DDMTD_COUNTER_M: u32 = (1 << DDMTD_COUNTER_N);
const F_SYS: f64 = csr::CONFIG_CLOCK_FREQUENCY as f64;
const F_MAIN: f64 = 125.0e6;
const F_HELPER: f64 = F_MAIN * DDMTD_COUNTER_M as f64 / (DDMTD_COUNTER_M + 1) as f64;
const F_BEAT: f64 = F_MAIN - F_HELPER;
const TIME_STEP: f32 = 1./F_BEAT as f32;
fn ddmtd_tag_to_s(mu: f32) -> f32 {
return (mu as f32)*TIME_STEP;
}
fn get_frequencies() -> (u32, u32, u32) {
unsafe {
csr::wrpll::frequency_counter_update_en_write(1);
// wait for at least one full update cycle (> 2 timer periods)
clock::spin_us(200_000);
csr::wrpll::frequency_counter_update_en_write(0);
let helper = csr::wrpll::frequency_counter_counter_helper_read();
let main = csr::wrpll::frequency_counter_counter_rtio_read();
let cdr = csr::wrpll::frequency_counter_counter_rtio_rx0_read();
(helper, main, cdr)
}
}
fn log_frequencies() -> (u32, u32, u32) {
let (f_helper, f_main, f_cdr) = get_frequencies();
let conv_khz = |f| 4*(f as u64)*(csr::CONFIG_CLOCK_FREQUENCY as u64)/(1000*(1 << 23));
info!("helper clock frequency: {}kHz ({})", conv_khz(f_helper), f_helper);
info!("main clock frequency: {}kHz ({})", conv_khz(f_main), f_main);
info!("CDR clock frequency: {}kHz ({})", conv_khz(f_cdr), f_cdr);
(f_helper, f_main, f_cdr)
}
fn get_tags() -> (i32, i32, u16, u16) {
unsafe {
csr::wrpll::tag_arm_write(1);
while csr::wrpll::tag_arm_read() != 0 {}
let main_diff = csr::wrpll::main_diff_tag_read() as i32;
let helper_diff = csr::wrpll::helper_diff_tag_read() as i32;
let ref_tag = csr::wrpll::ref_tag_read();
let main_tag = csr::wrpll::main_tag_read();
(main_diff, helper_diff, ref_tag, main_tag)
}
}
fn print_tags() {
const NUM_TAGS: usize = 30;
let mut main_diffs = [0; NUM_TAGS]; // input to main loop filter
let mut helper_diffs = [0; NUM_TAGS]; // input to helper loop filter
let mut ref_tags = [0; NUM_TAGS];
let mut main_tags = [0; NUM_TAGS];
let mut jitter = [0 as f32; NUM_TAGS];
for i in 0..NUM_TAGS {
let (main_diff, helper_diff, ref_tag, main_tag) = get_tags();
main_diffs[i] = main_diff;
helper_diffs[i] = helper_diff;
ref_tags[i] = ref_tag;
main_tags[i] = main_tag;
}
info!("DDMTD ref tags: {:?}", ref_tags);
info!("DDMTD main tags: {:?}", main_tags);
info!("DDMTD main diffs: {:?}", main_diffs);
info!("DDMTD helper diffs: {:?}", helper_diffs);
// look at the difference between the main DCXO and reference...
let t0 = main_diffs[0];
main_diffs.iter_mut().for_each(|x| *x -= t0);
// crude estimate of the max difference across our sample set (assumes no unwrapping issues...)
let delta = main_diffs[main_diffs.len()-1] as f32 / (main_diffs.len()-1) as f32;
info!("detla: {:?} tags", delta);
let delta_f: f32 = delta/DDMTD_COUNTER_M as f32 * F_BEAT as f32;
info!("MAIN <-> ref frequency difference: {:?} Hz ({:?} ppm)", delta_f, delta_f/F_HELPER as f32 * 1e6);
jitter.iter_mut().enumerate().for_each(|(i, x)| *x = main_diffs[i] as f32 - delta*(i as f32));
info!("jitter: {:?} tags", jitter);
let var = jitter.iter().map(|x| x*x).fold(0 as f32, |acc, x| acc + x as f32) / NUM_TAGS as f32;
info!("variance: {:?} tags^2", var);
}
pub fn init() {
info!("initializing WR PLL...");
unsafe { csr::wrpll::helper_reset_write(1); }
unsafe {
csr::wrpll::helper_dcxo_i2c_address_write(si549::ADDRESS);
csr::wrpll::main_dcxo_i2c_address_write(si549::ADDRESS);
}
#[cfg(rtio_frequency = "125.0")]
let (h_hsdiv, h_lsdiv, h_fbdiv) = (0x05c, 0, 0x04b5badb98a);
#[cfg(rtio_frequency = "125.0")]
let (m_hsdiv, m_lsdiv, m_fbdiv) = (0x05c, 0, 0x04b5c447213);
si549::program(i2c::Dcxo::Main, m_hsdiv, m_lsdiv, m_fbdiv)
.expect("cannot initialize main Si549");
si549::program(i2c::Dcxo::Helper, h_hsdiv, h_lsdiv, h_fbdiv)
.expect("cannot initialize helper Si549");
// Si549 Settling Time for Large Frequency Change.
// Datasheet said 10ms but it lied.
clock::spin_us(50_000);
unsafe { csr::wrpll::helper_reset_write(0); }
clock::spin_us(1);
}
pub fn diagnostics() {
info!("WRPLL diagnostics...");
info!("Untrimmed oscillator frequencies:");
log_frequencies();
info!("Increase helper DCXO frequency by +10ppm (1.25kHz):");
si549::set_adpll(i2c::Dcxo::Helper, 85911).expect("ADPLL write failed");
// to do: add check on frequency?
log_frequencies();
}
fn trim_dcxos(f_helper: u32, f_main: u32, f_cdr: u32) -> Result<(i32, i32), &'static str> {
info!("Trimming oscillator frequencies...");
const DCXO_STEP: i64 = (1.0e6/0.0001164) as i64;
const ADPLL_MAX: i64 = (950.0/0.0001164) as i64;
const TIMER_WIDTH: u32 = 23;
const COUNTER_DIV: u32 = 2;
// how many counts we expect to measure
const SYS_COUNTS: i64 = (1 << (TIMER_WIDTH - COUNTER_DIV)) as i64;
const EXP_MAIN_COUNTS: i64 = ((SYS_COUNTS as f64) * (F_MAIN/F_SYS)) as i64;
const EXP_HELPER_COUNTS: i64 = ((SYS_COUNTS as f64) * (F_HELPER/F_SYS)) as i64;
// calibrate the SYS clock to the CDR clock and correct the measured counts
// assume frequency errors are small so we can make an additive correction
// positive error means sys clock is too fast
let sys_err: i64 = EXP_MAIN_COUNTS - (f_cdr as i64);
let main_err: i64 = EXP_MAIN_COUNTS - (f_main as i64) - sys_err;
let helper_err: i64 = EXP_HELPER_COUNTS - (f_helper as i64) - sys_err;
info!("sys count err {}", sys_err);
info!("main counts err {}", main_err);
info!("helper counts err {}", helper_err);
// calculate required adjustment to the ADPLL register see
// https://www.silabs.com/documents/public/data-sheets/si549-datasheet.pdf
// section 5.6
let helper_adpll: i64 = helper_err*DCXO_STEP/EXP_HELPER_COUNTS;
let main_adpll: i64 = main_err*DCXO_STEP/EXP_MAIN_COUNTS;
if helper_adpll.abs() > ADPLL_MAX {
return Err("helper DCXO offset too large");
}
if main_adpll.abs() > ADPLL_MAX {
return Err("main DCXO offset too large");
}
info!("ADPLL offsets: helper={} main={}", helper_adpll, main_adpll);
Ok((helper_adpll as i32, main_adpll as i32))
}
fn statistics(data: &[u16]) -> (f32, f32) {
let sum = data.iter().fold(0 as u32, |acc, x| acc + *x as u32);
let mean = sum as f32 / data.len() as f32;
let squared_sum = data.iter().fold(0 as u32, |acc, x| acc + (*x as u32).pow(2));
let variance = (squared_sum as f32 / data.len() as f32) - mean;
return (mean, variance)
}
fn select_recovered_clock_int(rc: bool) -> Result<(), &'static str> {
info!("Untrimmed oscillator frequencies:");
let (f_helper, f_main, f_cdr) = log_frequencies();
if rc {
let (helper_adpll, main_adpll) = trim_dcxos(f_helper, f_main, f_cdr)?;
// to do: add assertion on max frequency shift here?
si549::set_adpll(i2c::Dcxo::Helper, helper_adpll).expect("ADPLL write failed");
si549::set_adpll(i2c::Dcxo::Main, main_adpll).expect("ADPLL write failed");
log_frequencies();
clock::spin_us(100_000); // TO DO: remove/reduce!
print_tags();
info!("increasing main DCXO by 1ppm (125Hz):");
si549::set_adpll(i2c::Dcxo::Main, main_adpll + 8591).expect("ADPLL write failed");
clock::spin_us(100_000);
print_tags();
si549::set_adpll(i2c::Dcxo::Main, main_adpll).expect("ADPLL write failed");
unsafe {
csr::wrpll::adpll_offset_helper_write(helper_adpll as u32);
csr::wrpll::adpll_offset_main_write(main_adpll as u32);
csr::wrpll::helper_dcxo_gpio_enable_write(0);
csr::wrpll::main_dcxo_gpio_enable_write(0);
csr::wrpll::helper_dcxo_errors_write(0xff);
csr::wrpll::main_dcxo_errors_write(0xff);
csr::wrpll::collector_reset_write(0);
}
clock::spin_us(1_000); // wait for the collector to produce meaningful output
unsafe {
csr::wrpll::filter_reset_write(0);
}
clock::spin_us(100_000);
print_tags();
// let mut tags = [0; 10];
// for i in 0..tags.len() {
// tags[i] = get_ddmtd_helper_tag();
// }
// info!("DDMTD helper tags: {:?}", tags);
unsafe {
csr::wrpll::filter_reset_write(1);
csr::wrpll::collector_reset_write(1);
}
clock::spin_us(50_000);
unsafe {
csr::wrpll::helper_dcxo_gpio_enable_write(1);
csr::wrpll::main_dcxo_gpio_enable_write(1);
}
unsafe {
info!("error {} {}",
csr::wrpll::helper_dcxo_errors_read(),
csr::wrpll::main_dcxo_errors_read());
}
info!("new ADPLL: {} {}",
si549::get_adpll(i2c::Dcxo::Helper)?,
si549::get_adpll(i2c::Dcxo::Main)?);
} else {
si549::set_adpll(i2c::Dcxo::Helper, 0).expect("ADPLL write failed");
si549::set_adpll(i2c::Dcxo::Main, 0).expect("ADPLL write failed");
}
Ok(())
}
pub fn select_recovered_clock(rc: bool) {
if rc {
info!("switching to recovered clock");
} else {
info!("switching to local XO clock");
}
match select_recovered_clock_int(rc) {
Ok(()) => info!("clock transition completed"),
Err(e) => error!("clock transition failed: {}", e)
}
}

23
artiq/firmware/satman/main.rs
View File

@ -12,8 +12,6 @@ use core::convert::TryFrom;
use board_misoc::{csr, ident, clock, uart_logger, i2c, pmp};
#[cfg(has_si5324)]
use board_artiq::si5324;
#[cfg(has_wrpll)]
use board_artiq::wrpll;
use board_artiq::{spi, drtioaux};
use board_artiq::drtio_routing;
#[cfg(has_hmc830_7043)]
@ -492,17 +490,6 @@ pub extern fn main() -> i32 {
io_expander1 = board_misoc::io_expander::IoExpander::new(1);
io_expander0.init().expect("I2C I/O expander #0 initialization failed");
io_expander1.init().expect("I2C I/O expander #1 initialization failed");
#[cfg(has_wrpll)]
{
io_expander0.set_oe(1, 1 << 7).unwrap();
io_expander0.set(1, 7, true);
io_expander0.service().unwrap();
io_expander1.set_oe(0, 1 << 7).unwrap();
io_expander1.set_oe(1, 1 << 7).unwrap();
io_expander1.set(0, 7, true);
io_expander1.set(1, 7, true);
io_expander1.service().unwrap();
}
// Actively drive TX_DISABLE to false on SFP0..3
io_expander0.set_oe(0, 1 << 1).unwrap();
@ -519,8 +506,6 @@ pub extern fn main() -> i32 {
#[cfg(has_si5324)]
si5324::setup(&SI5324_SETTINGS, si5324::Input::Ckin1).expect("cannot initialize Si5324");
#[cfg(has_wrpll)]
wrpll::init();
unsafe {
csr::drtio_transceiver::stable_clkin_write(1);
@ -530,8 +515,6 @@ pub extern fn main() -> i32 {
unsafe {
csr::drtio_transceiver::txenable_write(0xffffffffu32 as _);
}
#[cfg(has_wrpll)]
wrpll::diagnostics();
init_rtio_crg();
#[cfg(has_hmc830_7043)]
@ -582,8 +565,6 @@ pub extern fn main() -> i32 {
si5324::siphaser::select_recovered_clock(true).expect("failed to switch clocks");
si5324::siphaser::calibrate_skew().expect("failed to calibrate skew");
}
#[cfg(has_wrpll)]
wrpll::select_recovered_clock(true);
drtioaux::reset(0);
drtiosat_reset(false);
@ -632,7 +613,7 @@ pub extern fn main() -> i32 {
if is_up && !was_up {
/*
* One side of the JESD204 elastic buffer is clocked by the jitter filter
* (Si5324 or WRPLL), the other by the RTM.
* (Si5324), the other by the RTM.
* The elastic buffer can operate only when those two clocks are derived from
* the same oscillator.
* This is the case when either of those conditions is true:
@ -664,8 +645,6 @@ pub extern fn main() -> i32 {
info!("uplink is down, switching to local oscillator clock");
#[cfg(has_si5324)]
si5324::siphaser::select_recovered_clock(false).expect("failed to switch clocks");
#[cfg(has_wrpll)]
wrpll::select_recovered_clock(false);
}
}

2
artiq/gateware/drtio/wrpll/__init__.py
View File

@ -1,2 +0,0 @@
from artiq.gateware.drtio.wrpll.core import WRPLL
from artiq.gateware.drtio.wrpll.ddmtd import DDMTDSamplerExtFF, DDMTDSamplerGTP

156
artiq/gateware/drtio/wrpll/core.py
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@ -1,156 +0,0 @@
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.genlib.cdc import MultiReg, PulseSynchronizer
from misoc.interconnect.csr import *
from artiq.gateware.drtio.wrpll.si549 import Si549
from artiq.gateware.drtio.wrpll.ddmtd import DDMTD, Collector
from artiq.gateware.drtio.wrpll import thls, filters
class FrequencyCounter(Module, AutoCSR):
def __init__(self, timer_width=23, counter_width=23, domains=["helper", "rtio", "rtio_rx0"]):
for domain in domains:
name = "counter_" + domain
counter = CSRStatus(counter_width, name=name)
setattr(self, name, counter)
self.update_en = CSRStorage()
timer = Signal(timer_width)
timer_tick = Signal()
self.sync += Cat(timer, timer_tick).eq(timer + 1)
for domain in domains:
sync_domain = getattr(self.sync, domain)
divider = Signal(2)
sync_domain += divider.eq(divider + 1)
divided = Signal()
divided.attr.add("no_retiming")
sync_domain += divided.eq(divider[-1])
divided_sys = Signal()
self.specials += MultiReg(divided, divided_sys)
divided_sys_r = Signal()
divided_tick = Signal()
self.sync += divided_sys_r.eq(divided_sys)
self.comb += divided_tick.eq(divided_sys & ~divided_sys_r)
counter = Signal(counter_width)
counter_csr = getattr(self, "counter_" + domain)
self.sync += [
If(timer_tick,
If(self.update_en.storage, counter_csr.status.eq(counter)),
counter.eq(0),
).Else(
If(divided_tick, counter.eq(counter + 1))
)
]
class WRPLL(Module, AutoCSR):
def __init__(self, helper_clk_pads, main_dcxo_i2c, helper_dxco_i2c, ddmtd_inputs, N=15):
self.helper_reset = CSRStorage(reset=1)
self.collector_reset = CSRStorage(reset=1)
self.filter_reset = CSRStorage(reset=1)
self.adpll_offset_helper = CSRStorage(24)
self.adpll_offset_main = CSRStorage(24)
self.tag_arm = CSR()
self.main_diff_tag = CSRStatus(32)
self.helper_diff_tag = CSRStatus(32)
self.ref_tag = CSRStatus(N)
self.main_tag = CSRStatus(N)
main_diff_tag_32 = Signal((32, True))
helper_diff_tag_32 = Signal((32, True))
self.comb += [
self.main_diff_tag.status.eq(main_diff_tag_32),
self.helper_diff_tag.status.eq(helper_diff_tag_32)
]
self.clock_domains.cd_helper = ClockDomain()
self.clock_domains.cd_collector = ClockDomain()
self.clock_domains.cd_filter = ClockDomain()
self.helper_reset.storage.attr.add("no_retiming")
self.filter_reset.storage.attr.add("no_retiming")
self.specials += Instance("IBUFGDS",
i_I=helper_clk_pads.p, i_IB=helper_clk_pads.n,
o_O=self.cd_helper.clk)
self.comb += [
self.cd_collector.clk.eq(self.cd_collector.clk),
self.cd_filter.clk.eq(self.cd_helper.clk),
]
self.specials += [
AsyncResetSynchronizer(self.cd_helper, self.helper_reset.storage),
AsyncResetSynchronizer(self.cd_collector, self.collector_reset.storage),
AsyncResetSynchronizer(self.cd_filter, self.filter_reset.storage)
]
self.submodules.helper_dcxo = Si549(helper_dxco_i2c)
self.submodules.main_dcxo = Si549(main_dcxo_i2c)
# for diagnostics and PLL initialization
self.submodules.frequency_counter = FrequencyCounter()
ddmtd_counter = Signal(N)
self.sync.helper += ddmtd_counter.eq(ddmtd_counter + 1)
self.submodules.ddmtd_ref = DDMTD(ddmtd_counter, ddmtd_inputs.rec_clk)
self.submodules.ddmtd_main = DDMTD(ddmtd_counter, ddmtd_inputs.main_xo)
collector_cd = ClockDomainsRenamer("collector")
filter_cd = ClockDomainsRenamer("filter")
self.submodules.collector = collector_cd(Collector(N))
self.submodules.filter_helper = filter_cd(
thls.make(filters.helper, data_width=48))
self.submodules.filter_main = filter_cd(
thls.make(filters.main, data_width=48))
self.comb += [
self.collector.tag_ref.eq(self.ddmtd_ref.h_tag),
self.collector.ref_stb.eq(self.ddmtd_ref.h_tag_update),
self.collector.tag_main.eq(self.ddmtd_main.h_tag),
self.collector.main_stb.eq(self.ddmtd_main.h_tag_update)
]
collector_stb_ps = PulseSynchronizer("helper", "sys")
self.submodules += collector_stb_ps
self.sync.helper += collector_stb_ps.i.eq(self.collector.out_stb)
collector_stb_sys = Signal()
self.sync += collector_stb_sys.eq(collector_stb_ps.o)
main_diff_tag_sys = Signal((N+2, True))
helper_diff_tag_sys = Signal((N+2, True))
ref_tag_sys = Signal(N)
main_tag_sys = Signal(N)
self.specials += MultiReg(self.collector.out_main, main_diff_tag_sys)
self.specials += MultiReg(self.collector.out_helper, helper_diff_tag_sys)
self.specials += MultiReg(self.collector.tag_ref, ref_tag_sys)
self.specials += MultiReg(self.collector.tag_main, main_tag_sys)
self.sync += [
If(self.tag_arm.re & self.tag_arm.r, self.tag_arm.w.eq(1)),
If(collector_stb_sys,
self.tag_arm.w.eq(0),
If(self.tag_arm.w,
main_diff_tag_32.eq(main_diff_tag_sys),
helper_diff_tag_32.eq(helper_diff_tag_sys),
self.ref_tag.status.eq(ref_tag_sys),
self.main_tag.status.eq(main_tag_sys)
)
)
]
self.comb += [
self.filter_helper.input.eq(self.collector.out_helper << 22),
self.filter_helper.input_stb.eq(self.collector.out_stb),
self.filter_main.input.eq(self.collector.out_main),
self.filter_main.input_stb.eq(self.collector.out_stb)
]
self.sync.helper += [
self.helper_dcxo.adpll_stb.eq(self.filter_helper.output_stb),
self.helper_dcxo.adpll.eq(self.filter_helper.output + self.adpll_offset_helper.storage),
self.main_dcxo.adpll_stb.eq(self.filter_main.output_stb),
self.main_dcxo.adpll.eq(self.filter_main.output + self.adpll_offset_main.storage)
]

221
artiq/gateware/drtio/wrpll/ddmtd.py
View File

@ -1,221 +0,0 @@
from migen import *
from migen.genlib.cdc import PulseSynchronizer, MultiReg
from migen.genlib.fsm import FSM
from misoc.interconnect.csr import *
class DDMTDSamplerExtFF(Module):
def __init__(self, ddmtd_inputs):
self.rec_clk = Signal()
self.main_xo = Signal()
# # #
# TODO: s/h timing at FPGA pads
if hasattr(ddmtd_inputs, "rec_clk"):
rec_clk_1 = ddmtd_inputs.rec_clk
else:
rec_clk_1 = Signal()
self.specials += Instance("IBUFDS",
i_I=ddmtd_inputs.rec_clk_p, i_IB=ddmtd_inputs.rec_clk_n,
o_O=rec_clk_1)
if hasattr(ddmtd_inputs, "main_xo"):
main_xo_1 = ddmtd_inputs.main_xo
else:
main_xo_1 = Signal()
self.specials += Instance("IBUFDS",
i_I=ddmtd_inputs.main_xo_p, i_IB=ddmtd_inputs.main_xo_n,
o_O=main_xo_1)
self.specials += [
Instance("FD", i_C=ClockSignal("helper"),
i_D=rec_clk_1, o_Q=self.rec_clk,
attr={("IOB", "TRUE")}),
Instance("FD", i_C=ClockSignal("helper"),
i_D=main_xo_1, o_Q=self.main_xo,
attr={("IOB", "TRUE")}),
]
class DDMTDSamplerGTP(Module):
def __init__(self, gtp, main_xo_pads):
self.rec_clk = Signal()
self.main_xo = Signal()
# # #
# Getting the main XO signal from IBUFDS_GTE2 is problematic because
# the transceiver PLL craps out if an improper clock signal is applied,
# so we are disabling the buffer until the clock is stable.
main_xo_se = Signal()
rec_clk_1 = Signal()
main_xo_1 = Signal()
self.specials += [
Instance("IBUFDS",
i_I=main_xo_pads.p, i_IB=main_xo_pads.n,
o_O=main_xo_se),
Instance("FD", i_C=ClockSignal("helper"),
i_D=gtp.cd_rtio_rx0.clk, o_Q=rec_clk_1,
attr={("DONT_TOUCH", "TRUE")}),
Instance("FD", i_C=ClockSignal("helper"),
i_D=rec_clk_1, o_Q=self.rec_clk,
attr={("DONT_TOUCH", "TRUE")}),
Instance("FD", i_C=ClockSignal("helper"),
i_D=main_xo_se, o_Q=main_xo_1,
attr={("IOB", "TRUE")}),
Instance("FD", i_C=ClockSignal("helper"),
i_D=main_xo_1, o_Q=self.main_xo,
attr={("DONT_TOUCH", "TRUE")}),
]
class DDMTDDeglitcherFirstEdge(Module):
def __init__(self, input_signal, blind_period=128):
self.detect = Signal()
self.tag_correction = 0
rising = Signal()
input_signal_r = Signal()
self.sync.helper += [
input_signal_r.eq(input_signal),
rising.eq(input_signal & ~input_signal_r)
]
blind_counter = Signal(max=blind_period)
self.sync.helper += [
If(blind_counter != 0, blind_counter.eq(blind_counter - 1)),
If(input_signal_r, blind_counter.eq(blind_period - 1)),
self.detect.eq(rising & (blind_counter == 0))
]
class DDMTD(Module):
def __init__(self, counter, input_signal):
# in helper clock domain
self.h_tag = Signal(len(counter))
self.h_tag_update = Signal()
# # #
deglitcher = DDMTDDeglitcherFirstEdge(input_signal)
self.submodules += deglitcher
self.sync.helper += [
self.h_tag_update.eq(0),
If(deglitcher.detect,
self.h_tag_update.eq(1),
self.h_tag.eq(counter + deglitcher.tag_correction)
)
]
class Collector(Module):
"""Generates loop filter inputs from DDMTD outputs.
The input to the main DCXO lock loop filter is the difference between the
reference and main tags after unwrapping (see below).
The input to the helper DCXO lock loop filter is the difference between the
current reference tag and the previous reference tag after unwrapping.
When the WR PLL is locked, the following ideally (no noise/jitter) obtain:
- f_main = f_ref
- f_helper = f_ref * 2^N/(2^N+1)
- f_beat = f_ref - f_helper = f_ref / (2^N + 1) (cycle time is: dt=1/f_beat)
- the reference and main DCXO tags are equal to each other at every cycle
(the main DCXO lock drives this difference to 0)
- the reference and main DCXO tags both have the same value at each cycle
(the tag difference for each DDMTD is given by
f_helper*dt = f_helper/f_beat = 2^N, which causes the N-bit DDMTD counter
to wrap around and come back to its previous value)
Note that we currently lock the frequency of the helper DCXO to the
reference clock, not it's phase. As a result, while the tag differences are
controlled, their absolute values are arbitrary. We could consider moving
the helper lock to a phase lock at some point in the future...
Since the DDMTD counter is only N bits, it is possible for tag values to
wrap around. This will happen frequently if the locked tags happens to be
near the edges of the counter, so that jitter can easily cause a phase wrap.
But, it can also easily happen during lock acquisition or other transients.
To avoid glitches in the output, we unwrap the tag differences. Currently
we do this in hardware, but we should consider extending the processor to
allow us to do it inside the filters. Since the processor uses wider
signals, this would significantly extend the overall glitch-free
range of the PLL and may aid lock acquisition.
"""
def __init__(self, N):
self.ref_stb = Signal()
self.main_stb = Signal()
self.tag_ref = Signal(N)
self.tag_main = Signal(N)
self.out_stb = Signal()
self.out_main = Signal((N+2, True))
self.out_helper = Signal((N+2, True))
self.out_tag_ref = Signal(N)
self.out_tag_main = Signal(N)
tag_ref_r = Signal(N)
tag_main_r = Signal(N)
main_tag_diff = Signal((N+2, True))
helper_tag_diff = Signal((N+2, True))
# # #
fsm = FSM(reset_state="IDLE")
self.submodules += fsm
fsm.act("IDLE",
NextValue(self.out_stb, 0),
If(self.ref_stb & self.main_stb,
NextValue(tag_ref_r, self.tag_ref),
NextValue(tag_main_r, self.tag_main),
NextState("DIFF")
).Elif(self.ref_stb,
NextValue(tag_ref_r, self.tag_ref),
NextState("WAITMAIN")
).Elif(self.main_stb,
NextValue(tag_main_r, self.tag_main),
NextState("WAITREF")
)
)
fsm.act("WAITREF",
If(self.ref_stb,
NextValue(tag_ref_r, self.tag_ref),
NextState("DIFF")
)
)
fsm.act("WAITMAIN",
If(self.main_stb,
NextValue(tag_main_r, self.tag_main),
NextState("DIFF")
)
)
fsm.act("DIFF",
NextValue(main_tag_diff, tag_main_r - tag_ref_r),
NextValue(helper_tag_diff, tag_ref_r - self.out_tag_ref),
NextState("UNWRAP")
)
fsm.act("UNWRAP",
If(main_tag_diff - self.out_main > 2**(N-1),
NextValue(main_tag_diff, main_tag_diff - 2**N)
).Elif(self.out_main - main_tag_diff > 2**(N-1),
NextValue(main_tag_diff, main_tag_diff + 2**N)
),
If(helper_tag_diff - self.out_helper > 2**(N-1),
NextValue(helper_tag_diff, helper_tag_diff - 2**N)
).Elif(self.out_helper - helper_tag_diff > 2**(N-1),
NextValue(helper_tag_diff, helper_tag_diff + 2**N)
),
NextState("OUTPUT")
)
fsm.act("OUTPUT",
NextValue(self.out_tag_ref, tag_ref_r),
NextValue(self.out_tag_main, tag_main_r),
NextValue(self.out_main, main_tag_diff),
NextValue(self.out_helper, helper_tag_diff),
NextValue(self.out_stb, 1),
NextState("IDLE")
)

61
artiq/gateware/drtio/wrpll/filters.py
View File

@ -1,61 +0,0 @@
helper_xn1 = 0
helper_xn2 = 0
helper_yn0 = 0
helper_yn1 = 0
helper_yn2 = 0
helper_out = 0
main_xn1 = 0
main_xn2 = 0
main_yn0 = 0
main_yn1 = 0
main_yn2 = 0
def helper(tag_diff):
global helper_xn1, helper_xn2, helper_yn0, \
helper_yn1, helper_yn2, helper_out
helper_xn0 = 0 - tag_diff # *(2**22)
helper_yr = 4294967296
helper_yn2 = helper_yn1
helper_yn1 = helper_yn0
helper_yn0 = (284885690 * (helper_xn0
+ (217319150 * helper_xn1 >> 44)
- (17591968725108 * helper_xn2 >> 44)
) >> 44
) + (35184372088832*helper_yn1 >> 44) - helper_yn2
helper_xn2 = helper_xn1
helper_xn1 = helper_xn0
helper_out = 268435456*helper_yn0 >> 44
helper_out = min(helper_out, helper_yr)
helper_out = max(helper_out, 0 - helper_yr)
return helper_out
def main(main_xn0):
global main_xn1, main_xn2, main_yn0, main_yn1, main_yn2
main_yr = 4294967296
main_yn2 = main_yn1
main_yn1 = main_yn0
main_yn0 = (
((133450380908*(((35184372088832*main_xn0) >> 44) +
((17592186044417*main_xn1) >> 44))) >> 44) +
((29455872930889*main_yn1) >> 44) -
((12673794781453*main_yn2) >> 44))
main_xn2 = main_xn1
main_xn1 = main_xn0
main_yn0 = min(main_yn0, main_yr)
main_yn0 = max(main_yn0, 0 - main_yr)
return main_yn0

340
artiq/gateware/drtio/wrpll/si549.py
View File

@ -1,340 +0,0 @@
from migen import *
from migen.genlib.fsm import *
from migen.genlib.cdc import MultiReg, PulseSynchronizer, BlindTransfer
from misoc.interconnect.csr import *
class I2CClockGen(Module):
def __init__(self, width):
self.load = Signal(width)
self.clk2x = Signal()
cnt = Signal.like(self.load)
self.comb += [
self.clk2x.eq(cnt == 0),
]
self.sync += [
If(self.clk2x,
cnt.eq(self.load),
).Else(
cnt.eq(cnt - 1),
)
]
class I2CMasterMachine(Module):
def __init__(self, clock_width):
self.scl = Signal(reset=1)
self.sda_o = Signal(reset=1)
self.sda_i = Signal()
self.submodules.cg = CEInserter()(I2CClockGen(clock_width))
self.start = Signal()
self.stop = Signal()
self.write = Signal()
self.ack = Signal()
self.data = Signal(8)
self.ready = Signal()
###
bits = Signal(4)
data = Signal(8)
fsm = CEInserter()(FSM("IDLE"))
self.submodules += fsm
fsm.act("IDLE",
self.ready.eq(1),
If(self.start,
NextState("START0"),
).Elif(self.stop,
NextState("STOP0"),
).Elif(self.write,
NextValue(bits, 8),
NextValue(data, self.data),
NextState("WRITE0")
)
)
fsm.act("START0",
NextValue(self.scl, 1),
NextState("START1")
)
fsm.act("START1",
NextValue(self.sda_o, 0),
NextState("IDLE")
)
fsm.act("STOP0",
NextValue(self.scl, 0),
NextState("STOP1")
)
fsm.act("STOP1",
NextValue(self.sda_o, 0),
NextState("STOP2")
)
fsm.act("STOP2",
NextValue(self.scl, 1),
NextState("STOP3")
)
fsm.act("STOP3",
NextValue(self.sda_o, 1),
NextState("IDLE")
)
fsm.act("WRITE0",
NextValue(self.scl, 0),
NextState("WRITE1")
)
fsm.act("WRITE1",
If(bits == 0,
NextValue(self.sda_o, 1),
NextState("READACK0"),
).Else(
NextValue(self.sda_o, data[7]),
NextState("WRITE2"),
)
)
fsm.act("WRITE2",
NextValue(self.scl, 1),
NextValue(data[1:], data[:-1]),
NextValue(bits, bits - 1),
NextState("WRITE0"),
)
fsm.act("READACK0",
NextValue(self.scl, 1),
NextState("READACK1"),
)
fsm.act("READACK1",
NextValue(self.ack, ~self.sda_i),
NextState("IDLE")
)
run = Signal()
idle = Signal()
self.comb += [
run.eq((self.start | self.stop | self.write) & self.ready),
idle.eq(~run & fsm.ongoing("IDLE")),
self.cg.ce.eq(~idle),
fsm.ce.eq(run | self.cg.clk2x),
]
class ADPLLProgrammer(Module):
def __init__(self):
self.i2c_divider = Signal(16)
self.i2c_address = Signal(7)
self.adpll = Signal(24)
self.stb = Signal()
self.busy = Signal()
self.nack = Signal()
self.scl = Signal()
self.sda_i = Signal()
self.sda_o = Signal()
self.scl.attr.add("no_retiming")
self.sda_o.attr.add("no_retiming")
# # #
master = I2CMasterMachine(16)
self.submodules += master
self.comb += [
master.cg.load.eq(self.i2c_divider),
self.scl.eq(master.scl),
master.sda_i.eq(self.sda_i),
self.sda_o.eq(master.sda_o)
]
fsm = FSM()
self.submodules += fsm
adpll = Signal.like(self.adpll)
fsm.act("IDLE",
If(self.stb,
NextValue(adpll, self.adpll),
NextState("START")
)
)
fsm.act("START",
master.start.eq(1),
If(master.ready, NextState("DEVADDRESS"))
)
fsm.act("DEVADDRESS",
master.data.eq(self.i2c_address << 1),
master.write.eq(1),
If(master.ready, NextState("REGADRESS"))
)
fsm.act("REGADRESS",
master.data.eq(231),
master.write.eq(1),
If(master.ready,
If(master.ack,
NextState("DATA0")
).Else(
self.nack.eq(1),
NextState("STOP")
)
)
)
fsm.act("DATA0",
master.data.eq(adpll[0:8]),
master.write.eq(1),
If(master.ready,
If(master.ack,
NextState("DATA1")
).Else(
self.nack.eq(1),
NextState("STOP")
)
)
)
fsm.act("DATA1",
master.data.eq(adpll[8:16]),
master.write.eq(1),
If(master.ready,
If(master.ack,
NextState("DATA2")
).Else(
self.nack.eq(1),
NextState("STOP")
)
)
)
fsm.act("DATA2",
master.data.eq(adpll[16:24]),
master.write.eq(1),
If(master.ready,
If(~master.ack, self.nack.eq(1)),
NextState("STOP")
)
)
fsm.act("STOP",
master.stop.eq(1),
If(master.ready,
If(~master.ack, self.nack.eq(1)),
NextState("IDLE")
)
)
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def simulate_programmer():
from migen.sim.core import run_simulation
dut = ADPLLProgrammer()
def generator():
yield dut.i2c_divider.eq(4)
yield dut.i2c_address.eq(0x55)
yield
yield dut.adpll.eq(0x123456)
yield dut.stb.eq(1)
yield
yield dut.stb.eq(0)
yield
while (yield dut.busy):
yield
for _ in range(20):
yield
run_simulation(dut, generator(), vcd_name="tb.vcd")
class Si549(Module, AutoCSR):
def __init__(self, pads):
self.gpio_enable = CSRStorage(reset=1)
self.gpio_in = CSRStatus(2)
self.gpio_out = CSRStorage(2)
self.gpio_oe = CSRStorage(2)
self.i2c_divider = CSRStorage(16, reset=75)
self.i2c_address = CSRStorage(7)
self.errors = CSR(2)
# in helper clock domain
self.adpll = Signal(24)
self.adpll_stb = Signal()
# # #
programmer = ClockDomainsRenamer("helper")(ADPLLProgrammer())
self.submodules += programmer
self.i2c_divider.storage.attr.add("no_retiming")
self.i2c_address.storage.attr.add("no_retiming")
self.specials += [
MultiReg(self.i2c_divider.storage, programmer.i2c_divider, "helper"),
MultiReg(self.i2c_address.storage, programmer.i2c_address, "helper")
]
self.comb += [
programmer.adpll.eq(self.adpll),
programmer.stb.eq(self.adpll_stb)
]
self.gpio_enable.storage.attr.add("no_retiming")
self.gpio_out.storage.attr.add("no_retiming")
self.gpio_oe.storage.attr.add("no_retiming")
# SCL GPIO and mux
ts_scl = TSTriple(1)
self.specials += ts_scl.get_tristate(pads.scl)
status = Signal()
self.comb += self.gpio_in.status[0].eq(status)
self.specials += MultiReg(ts_scl.i, status)
self.comb += [
If(self.gpio_enable.storage,
ts_scl.o.eq(self.gpio_out.storage[0]),
ts_scl.oe.eq(self.gpio_oe.storage[0])
).Else(
ts_scl.o.eq(0),
ts_scl.oe.eq(~programmer.scl)
)
]
# SDA GPIO and mux
ts_sda = TSTriple(1)
self.specials += ts_sda.get_tristate(pads.sda)
status = Signal()
self.comb += self.gpio_in.status[1].eq(status)
self.specials += MultiReg(ts_sda.i, status)
self.comb += [
If(self.gpio_enable.storage,
ts_sda.o.eq(self.gpio_out.storage[1]),
ts_sda.oe.eq(self.gpio_oe.storage[1])
).Else(
ts_sda.o.eq(0),
ts_sda.oe.eq(~programmer.sda_o)
)
]
self.specials += MultiReg(ts_sda.i, programmer.sda_i, "helper")
# Error reporting
collision_cdc = BlindTransfer("helper", "sys")
self.submodules += collision_cdc
self.comb += collision_cdc.i.eq(programmer.stb & programmer.busy)
nack_cdc = PulseSynchronizer("helper", "sys")
self.submodules += nack_cdc
self.comb += nack_cdc.i.eq(programmer.nack)
for n, trig in enumerate([collision_cdc.o, nack_cdc.o]):
self.sync += [
If(self.errors.re & self.errors.r[n], self.errors.w[n].eq(0)),
If(trig, self.errors.w[n].eq(1))
]
if __name__ == "__main__":
simulate_programmer()

618
artiq/gateware/drtio/wrpll/thls.py
View File

@ -1,618 +0,0 @@
import inspect
import ast
from copy import copy
import operator
from functools import reduce
from collections import OrderedDict
from migen import *
from migen.genlib.fsm import *
class Isn:
def __init__(self, immediate=None, inputs=None, outputs=None):
if inputs is None:
inputs = []
if outputs is None:
outputs = []
self.immediate = immediate
self.inputs = inputs
self.outputs = outputs
def __repr__(self):
r = "<"
r += self.__class__.__name__
if self.immediate is not None:
r += " (" + str(self.immediate) + ")"
for inp in self.inputs:
r += " r" + str(inp)
if self.outputs:
r += " ->"
for outp in self.outputs:
r += " r" + str(outp)
r += ">"
return r
class NopIsn(Isn):
opcode = 0
class AddIsn(Isn):
opcode = 1
class SubIsn(Isn):
opcode = 2
class MulShiftIsn(Isn):
opcode = 3
# opcode = 4: MulShift with alternate shift
class MinIsn(Isn):
opcode = 5
class MaxIsn(Isn):
opcode = 6
class CopyIsn(Isn):
opcode = 7
class InputIsn(Isn):
opcode = 8
class OutputIsn(Isn):
opcode = 9
class EndIsn(Isn):
opcode = 10
class ASTCompiler:
def __init__(self):
self.program = []
self.data = []
self.next_ssa_reg = -1
self.constants = dict()
self.names = dict()
self.globals = OrderedDict()
def get_ssa_reg(self):
r = self.next_ssa_reg
self.next_ssa_reg -= 1
return r
def add_global(self, name):
if name not in self.globals:
r = len(self.data)
self.data.append(0)
self.names[name] = r
self.globals[name] = r
def input(self, name):
target = self.get_ssa_reg()
self.program.append(InputIsn(outputs=[target]))
self.names[name] = target
def emit(self, node):
if isinstance(node, ast.BinOp):
if isinstance(node.op, ast.RShift):
if not isinstance(node.left, ast.BinOp) or not isinstance(node.left.op, ast.Mult):
raise NotImplementedError
if not isinstance(node.right, ast.Num):
raise NotImplementedError
left = self.emit(node.left.left)
right = self.emit(node.left.right)
cons = lambda **kwargs: MulShiftIsn(immediate=node.right.n, **kwargs)
else:
left = self.emit(node.left)
right = self.emit(node.right)
if isinstance(node.op, ast.Add):
cons = AddIsn
elif isinstance(node.op, ast.Sub):
cons = SubIsn
elif isinstance(node.op, ast.Mult):
cons = lambda **kwargs: MulShiftIsn(immediate=0, **kwargs)
else:
raise NotImplementedError
output = self.get_ssa_reg()
self.program.append(cons(inputs=[left, right], outputs=[output]))
return output
elif isinstance(node, ast.Call):
if not isinstance(node.func, ast.Name):
raise NotImplementedError
funcname = node.func.id
if node.keywords:
raise NotImplementedError
inputs = [self.emit(x) for x in node.args]
if funcname == "min":
cons = MinIsn
elif funcname == "max":
cons = MaxIsn
else:
raise NotImplementedError
output = self.get_ssa_reg()
self.program.append(cons(inputs=inputs, outputs=[output]))
return output
elif isinstance(node, (ast.Num, ast.UnaryOp)):
if isinstance(node, ast.UnaryOp):
if not isinstance(node.operand, ast.Num):
raise NotImplementedError
if isinstance(node.op, ast.UAdd):
transform = lambda x: x
elif isinstance(node.op, ast.USub):
transform = operator.neg
elif isinstance(node.op, ast.Invert):
transform = operator.invert
else:
raise NotImplementedError
node = node.operand
else:
transform = lambda x: x
n = transform(node.n)
if n in self.constants:
return self.constants[n]
else:
r = len(self.data)
self.data.append(n)
self.constants[n] = r
return r
elif isinstance(node, ast.Name):
return self.names[node.id]
elif isinstance(node, ast.Assign):
output = self.emit(node.value)
for target in node.targets:
assert isinstance(target, ast.Name)
self.names[target.id] = output
elif isinstance(node, ast.Return):
value = self.emit(node.value)
self.program.append(OutputIsn(inputs=[value]))
elif isinstance(node, ast.Global):
pass
else:
raise NotImplementedError
class Processor:
def __init__(self, data_width=32, multiplier_stages=2):
self.data_width = data_width
self.multiplier_stages = multiplier_stages
self.multiplier_shifts = []
self.program_rom_size = None
self.data_ram_size = None
self.opcode_bits = 4
self.reg_bits = None
def get_instruction_latency(self, isn):
return {
AddIsn: 2,
SubIsn: 2,
MulShiftIsn: 1 + self.multiplier_stages,
MinIsn: 2,
MaxIsn: 2,
CopyIsn: 1,
InputIsn: 1
}[isn.__class__]
def encode_instruction(self, isn, exit):
opcode = isn.opcode
if isn.immediate is not None and not isinstance(isn, MulShiftIsn):
r0 = isn.immediate
if len(isn.inputs) >= 1:
r1 = isn.inputs[0]
else:
r1 = 0
else:
if len(isn.inputs) >= 1:
r0 = isn.inputs[0]
else:
r0 = 0
if len(isn.inputs) >= 2:
r1 = isn.inputs[1]
else:
r1 = 0
r = 0
for value, bits in ((exit, self.reg_bits), (r1, self.reg_bits), (r0, self.reg_bits), (opcode, self.opcode_bits)):
r <<= bits
r |= value
return r
def instruction_bits(self):
return 3*self.reg_bits + self.opcode_bits
def implement(self, program, data):
return ProcessorImpl(self, program, data)
class Scheduler:
def __init__(self, processor, reserved_data, program):
self.processor = processor
self.reserved_data = reserved_data
self.used_registers = set(range(self.reserved_data))
self.exits = dict()
self.program = program
self.remaining = copy(program)
self.output = []
def allocate_register(self):
r = min(set(range(max(self.used_registers) + 2)) - self.used_registers)
self.used_registers.add(r)
return r
def free_register(self, r):
assert r >= self.reserved_data
self.used_registers.discard(r)
def find_inputs(self, cycle, isn):
mapped_inputs = []
for inp in isn.inputs:
if inp >= 0:
mapped_inputs.append(inp)
else:
found = False
for i in range(cycle):
if i in self.exits:
r, rm = self.exits[i]
if r == inp:
mapped_inputs.append(rm)
found = True
break
if not found:
return None
return mapped_inputs
def schedule_one(self, isn):
cycle = len(self.output)
mapped_inputs = self.find_inputs(cycle, isn)
if mapped_inputs is None:
return False
if isn.outputs:
# check that exit slot is free
latency = self.processor.get_instruction_latency(isn)
exit = cycle + latency
if exit in self.exits:
return False
# avoid RAW hazard with global writeback
for output in isn.outputs:
if output >= 0:
for risn in self.remaining:
for inp in risn.inputs:
if inp == output:
return False
# Instruction can be scheduled
self.remaining.remove(isn)
for inp, minp in zip(isn.inputs, mapped_inputs):
can_free = inp < 0 and all(inp != rinp for risn in self.remaining for rinp in risn.inputs)
if can_free:
self.free_register(minp)
if isn.outputs:
assert len(isn.outputs) == 1
if isn.outputs[0] < 0:
output = self.allocate_register()
else:
output = isn.outputs[0]
self.exits[exit] = (isn.outputs[0], output)
self.output.append(isn.__class__(immediate=isn.immediate, inputs=mapped_inputs))
return True
def schedule(self):
while self.remaining:
success = False
for isn in self.remaining:
if self.schedule_one(isn):
success = True
break
if not success:
self.output.append(NopIsn())
self.output += [NopIsn()]*(max(self.exits.keys()) - len(self.output) + 1)
return self.output
class CompiledProgram:
def __init__(self, processor, program, exits, data, glbs):
self.processor = processor
self.program = program
self.exits = exits
self.data = data
self.globals = glbs
def pretty_print(self):
for cycle, isn in enumerate(self.program):
l = "{:4d} {:15}".format(cycle, str(isn))
if cycle in self.exits:
l += " -> r{}".format(self.exits[cycle])
print(l)
def dimension_processor(self):
self.processor.program_rom_size = len(self.program)
self.processor.data_ram_size = len(self.data)
self.processor.reg_bits = (self.processor.data_ram_size - 1).bit_length()
for isn in self.program:
if isinstance(isn, MulShiftIsn) and isn.immediate not in self.processor.multiplier_shifts:
self.processor.multiplier_shifts.append(isn.immediate)
def encode(self):
r = []
for i, isn in enumerate(self.program):
exit = self.exits.get(i, 0)
r.append(self.processor.encode_instruction(isn, exit))
return r
def compile(processor, function):
node = ast.parse(inspect.getsource(function))
assert isinstance(node, ast.Module)
assert len(node.body) == 1
node = node.body[0]
assert isinstance(node, ast.FunctionDef)
assert len(node.args.args) == 1
arg = node.args.args[0].arg
body = node.body
astcompiler = ASTCompiler()
for node in body:
if isinstance(node, ast.Global):
for name in node.names:
astcompiler.add_global(name)
arg_r = astcompiler.input(arg)
for node in body:
astcompiler.emit(node)
if isinstance(node, ast.Return):
break
for glbl, location in astcompiler.globals.items():
new_location = astcompiler.names[glbl]
if new_location != location:
astcompiler.program.append(CopyIsn(inputs=[new_location], outputs=[location]))
scheduler = Scheduler(processor, len(astcompiler.data), astcompiler.program)
scheduler.schedule()
program = copy(scheduler.output)
program.append(EndIsn())
max_reg = max(max(max(isn.inputs + [0]) for isn in program), max(v[1] for k, v in scheduler.exits.items()))
return CompiledProgram(
processor=processor,
program=program,
exits={k: v[1] for k, v in scheduler.exits.items()},
data=astcompiler.data + [0]*(max_reg - len(astcompiler.data) + 1),
glbs=astcompiler.globals)
class BaseUnit(Module):
def __init__(self, data_width):
self.stb_i = Signal()
self.i0 = Signal((data_width, True))
self.i1 = Signal((data_width, True))
self.stb_o = Signal()
self.o = Signal((data_width, True))
class NopUnit(BaseUnit):
pass
class OpUnit(BaseUnit):
def __init__(self, op, data_width, stages, op_data_width=None):
BaseUnit.__init__(self, data_width)
# work around Migen's mishandling of Verilog's cretinous operator width rules
if op_data_width is None:
op_data_width = data_width
if stages > 1:
# Vivado backward retiming for DSP does not work correctly if DSP inputs
# are not registered.
i0 = Signal.like(self.i0)
i1 = Signal.like(self.i1)
stb_i = Signal()
self.sync += [
i0.eq(self.i0),
i1.eq(self.i1),
stb_i.eq(self.stb_i)
]
output_stages = stages - 1
else:
i0, i1, stb_i = self.i0, self.i1, self.stb_i
output_stages = stages
o = Signal((op_data_width, True))
self.comb += o.eq(op(i0, i1))
stb_o = stb_i
for i in range(output_stages):
n_o = Signal((data_width, True))
if stages > 1:
n_o.attr.add(("retiming_backward", 1))
n_stb_o = Signal()
self.sync += [
n_o.eq(o),
n_stb_o.eq(stb_o)
]
o = n_o
stb_o = n_stb_o
self.comb += [
self.o.eq(o),
self.stb_o.eq(stb_o)
]
class SelectUnit(BaseUnit):
def __init__(self, op, data_width):
BaseUnit.__init__(self, data_width)
self.sync += [
self.stb_o.eq(self.stb_i),
If(op(self.i0, self.i1),
self.o.eq(self.i0)
).Else(
self.o.eq(self.i1)
)
]
class CopyUnit(BaseUnit):
def __init__(self, data_width):
BaseUnit.__init__(self, data_width)
self.comb += [
self.stb_o.eq(self.stb_i),
self.o.eq(self.i0)
]
class InputUnit(BaseUnit):
def __init__(self, data_width, input_stb, input):
BaseUnit.__init__(self, data_width)
self.buffer = Signal(data_width)
self.comb += [
self.stb_o.eq(self.stb_i),
self.o.eq(self.buffer)
]
class OutputUnit(BaseUnit):
def __init__(self, data_width, output_stb, output):
BaseUnit.__init__(self, data_width)
self.sync += [
output_stb.eq(self.stb_i),
output.eq(self.i0)
]
class ProcessorImpl(Module):
def __init__(self, pd, program, data):
self.input_stb = Signal()
self.input = Signal((pd.data_width, True))
self.output_stb = Signal()
self.output = Signal((pd.data_width, True))
self.busy = Signal()
# # #
program_mem = Memory(pd.instruction_bits(), pd.program_rom_size, init=program)
data_mem0 = Memory(pd.data_width, pd.data_ram_size, init=data)
data_mem1 = Memory(pd.data_width, pd.data_ram_size, init=data)
self.specials += program_mem, data_mem0, data_mem1
pc = Signal(pd.instruction_bits())
pc_next = Signal.like(pc)
pc_en = Signal()
self.sync += pc.eq(pc_next)
self.comb += [
If(pc_en,
pc_next.eq(pc + 1)
).Else(
pc_next.eq(0)
)
]
program_mem_port = program_mem.get_port()
self.specials += program_mem_port
self.comb += program_mem_port.adr.eq(pc_next)
s = 0
opcode = Signal(pd.opcode_bits)
self.comb += opcode.eq(program_mem_port.dat_r[s:s+pd.opcode_bits])
s += pd.opcode_bits
r0 = Signal(pd.reg_bits)
self.comb += r0.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
s += pd.reg_bits
r1 = Signal(pd.reg_bits)
self.comb += r1.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
s += pd.reg_bits
exit = Signal(pd.reg_bits)
self.comb += exit.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
data_read_port0 = data_mem0.get_port()
data_read_port1 = data_mem1.get_port()
self.specials += data_read_port0, data_read_port1
self.comb += [
data_read_port0.adr.eq(r0),
data_read_port1.adr.eq(r1)
]
data_write_port = data_mem0.get_port(write_capable=True)
data_write_port_dup = data_mem1.get_port(write_capable=True)
self.specials += data_write_port, data_write_port_dup
self.comb += [
data_write_port_dup.we.eq(data_write_port.we),
data_write_port_dup.adr.eq(data_write_port.adr),
data_write_port_dup.dat_w.eq(data_write_port.dat_w),
data_write_port.adr.eq(exit)
]
nop = NopUnit(pd.data_width)
adder = OpUnit(operator.add, pd.data_width, 1)
subtractor = OpUnit(operator.sub, pd.data_width, 1)
if pd.multiplier_shifts:
if len(pd.multiplier_shifts) != 1:
raise NotImplementedError
multiplier = OpUnit(lambda a, b: a * b >> pd.multiplier_shifts[0],
pd.data_width, pd.multiplier_stages, op_data_width=2*pd.data_width)
else:
multiplier = NopUnit(pd.data_width)
minu = SelectUnit(operator.lt, pd.data_width)
maxu = SelectUnit(operator.gt, pd.data_width)
copier = CopyUnit(pd.data_width)
inu = InputUnit(pd.data_width, self.input_stb, self.input)
outu = OutputUnit(pd.data_width, self.output_stb, self.output)
units = [nop, adder, subtractor, multiplier, minu, maxu, copier, inu, outu]
self.submodules += units
for unit in units:
self.sync += unit.stb_i.eq(0)
self.comb += [
unit.i0.eq(data_read_port0.dat_r),
unit.i1.eq(data_read_port1.dat_r),
If(unit.stb_o,
data_write_port.we.eq(1),
data_write_port.dat_w.eq(unit.o)
)
]
decode_table = [
(NopIsn.opcode, nop),
(AddIsn.opcode, adder),
(SubIsn.opcode, subtractor),
(MulShiftIsn.opcode, multiplier),
(MulShiftIsn.opcode + 1, multiplier),
(MinIsn.opcode, minu),
(MaxIsn.opcode, maxu),
(CopyIsn.opcode, copier),
(InputIsn.opcode, inu),
(OutputIsn.opcode, outu)
]
for allocated_opcode, unit in decode_table:
self.sync += If(pc_en & (opcode == allocated_opcode), unit.stb_i.eq(1))
fsm = FSM()
self.submodules += fsm
fsm.act("IDLE",
pc_en.eq(0),
NextValue(inu.buffer, self.input),
If(self.input_stb, NextState("PROCESSING"))
)
fsm.act("PROCESSING",
self.busy.eq(1),
pc_en.eq(1),
If(opcode == EndIsn.opcode,
pc_en.eq(0),
NextState("IDLE")
)
)
def make(function, **kwargs):
proc = Processor(**kwargs)
cp = compile(proc, function)
cp.dimension_processor()
return proc.implement(cp.encode(), cp.data)

50
artiq/gateware/targets/kasli.py
View File

@ -21,7 +21,6 @@ from artiq.gateware.rtio.xilinx_clocking import RTIOClockMultiplier, fix_serdes_
from artiq.gateware import eem
from artiq.gateware.drtio.transceiver import gtp_7series
from artiq.gateware.drtio.siphaser import SiPhaser7Series
from artiq.gateware.drtio.wrpll import WRPLL, DDMTDSamplerGTP
from artiq.gateware.drtio.rx_synchronizer import XilinxRXSynchronizer
from artiq.gateware.drtio import *
from artiq.build_soc import *
@ -443,7 +442,7 @@ class SatelliteBase(BaseSoC):
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, rtio_clk_freq=125e6, enable_sata=False, *, with_wrpll=False, gateware_identifier_str=None, hw_rev="v2.0", **kwargs):
def __init__(self, rtio_clk_freq=125e6, enable_sata=False, *, gateware_identifier_str=None, hw_rev="v2.0", **kwargs):
if hw_rev in ("v1.0", "v1.1"):
cpu_bus_width = 32
else:
@ -560,35 +559,18 @@ class SatelliteBase(BaseSoC):
rtio_clk_period = 1e9/rtio_clk_freq
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)
if with_wrpll:
self.submodules.wrpll_sampler = DDMTDSamplerGTP(
self.drtio_transceiver,
platform.request("cdr_clk_clean_fabric"))
helper_clk_pads = platform.request("ddmtd_helper_clk")
self.submodules.wrpll = WRPLL(
helper_clk_pads=helper_clk_pads,
main_dcxo_i2c=platform.request("ddmtd_main_dcxo_i2c"),
helper_dxco_i2c=platform.request("ddmtd_helper_dcxo_i2c"),
ddmtd_inputs=self.wrpll_sampler)
self.csr_devices.append("wrpll")
# note: do not use self.wrpll.cd_helper.clk; otherwise, vivado craps out with:
# critical warning: create_clock attempting to set clock on an unknown port/pin
# command: "create_clock -period 7.920000 -waveform {0.000000 3.960000} -name
# helper_clk [get_xlnx_outside_genome_inst_pin 20 0]
platform.add_period_constraint(helper_clk_pads.p, rtio_clk_period*0.99)
platform.add_false_path_constraints(self.crg.cd_sys.clk, helper_clk_pads.p)
else:
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("cdr_clk") if platform.hw_rev == "v2.0"
else platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ref_clk=self.crg.clk125_div2, ref_div2=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.config["HAS_SI5324"] = None
self.config["SI5324_SOFT_RESET"] = None
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("cdr_clk") if platform.hw_rev == "v2.0"
else platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ref_clk=self.crg.clk125_div2, ref_div2=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.config["HAS_SI5324"] = None
self.config["SI5324_SOFT_RESET"] = None
gtp = self.drtio_transceiver.gtps[0]
platform.add_period_constraint(gtp.txoutclk, rtio_clk_period)
@ -596,9 +578,6 @@ class SatelliteBase(BaseSoC):
platform.add_false_path_constraints(
self.crg.cd_sys.clk,
gtp.txoutclk, gtp.rxoutclk)
if with_wrpll:
platform.add_false_path_constraints(
helper_clk_pads.p, gtp.rxoutclk)
for gtp in self.drtio_transceiver.gtps[1:]:
platform.add_period_constraint(gtp.rxoutclk, rtio_clk_period)
platform.add_false_path_constraints(
@ -677,14 +656,11 @@ def main():
parser.add_argument("-V", "--variant", default="tester",
help="variant: {} (default: %(default)s)".format(
"/".join(sorted(VARIANTS.keys()))))
parser.add_argument("--with-wrpll", default=False, action="store_true")
parser.add_argument("--gateware-identifier-str", default=None,
help="Override ROM identifier")
args = parser.parse_args()
argdict = dict()
if args.with_wrpll:
argdict["with_wrpll"] = True
argdict["gateware_identifier_str"] = args.gateware_identifier_str
variant = args.variant.lower()

61
artiq/gateware/targets/sayma_amc.py
View File

@ -21,7 +21,6 @@ from artiq.gateware import fmcdio_vhdci_eem
from artiq.gateware.rtio.phy import ttl_simple, ttl_serdes_ultrascale, sawg
from artiq.gateware.drtio.transceiver import gth_ultrascale
from artiq.gateware.drtio.siphaser import SiPhaser7Series
from artiq.gateware.drtio.wrpll import WRPLL, DDMTDSamplerExtFF
from artiq.gateware.drtio.rx_synchronizer import XilinxRXSynchronizer
from artiq.gateware.drtio import *
from artiq.build_soc import *
@ -54,7 +53,7 @@ class SatelliteBase(MiniSoC):
}
mem_map.update(MiniSoC.mem_map)
def __init__(self, rtio_clk_freq=125e6, identifier_suffix="", gateware_identifier_str=None, with_sfp=False, *, with_wrpll, **kwargs):
def __init__(self, rtio_clk_freq=125e6, identifier_suffix="", gateware_identifier_str=None, with_sfp=False, *, **kwargs):
MiniSoC.__init__(self,
cpu_type="vexriscv",
cpu_bus_width=64,
@ -69,10 +68,6 @@ class SatelliteBase(MiniSoC):
platform = self.platform
if with_wrpll:
clock_recout_pads = platform.request("ddmtd_rec_clk")
else:
clock_recout_pads = None
if with_sfp:
# Use SFP0 to connect to master (Kasli)
self.comb += platform.request("sfp_tx_disable", 0).eq(0)
@ -84,7 +79,7 @@ class SatelliteBase(MiniSoC):
data_pads=[drtio_uplink, platform.request("rtm_amc_link")],
sys_clk_freq=self.clk_freq,
rtio_clk_freq=rtio_clk_freq,
clock_recout_pads=clock_recout_pads)
clock_recout_pads=None)
self.csr_devices.append("drtio_transceiver")
self.submodules.rtio_tsc = rtio.TSC("sync", glbl_fine_ts_width=3)
@ -134,39 +129,22 @@ class SatelliteBase(MiniSoC):
rtio_clk_period = 1e9/rtio_clk_freq
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)
if with_wrpll:
self.comb += [
platform.request("filtered_clk_sel").eq(0),
platform.request("ddmtd_main_dcxo_oe").eq(1),
platform.request("ddmtd_helper_dcxo_oe").eq(1)
]
self.submodules.wrpll_sampler = DDMTDSamplerExtFF(
platform.request("ddmtd_inputs"))
self.submodules.wrpll = WRPLL(
helper_clk_pads=platform.request("ddmtd_helper_clk"),
main_dcxo_i2c=platform.request("ddmtd_main_dcxo_i2c"),
helper_dxco_i2c=platform.request("ddmtd_helper_dcxo_i2c"),
ddmtd_inputs=self.wrpll_sampler)
self.csr_devices.append("wrpll")
platform.add_period_constraint(self.wrpll.cd_helper.clk, rtio_clk_period*0.99)
platform.add_false_path_constraints(self.crg.cd_sys.clk, self.wrpll.cd_helper.clk)
else:
self.comb += platform.request("filtered_clk_sel").eq(1)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ultrascale=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
self.csr_devices.append("i2c")
self.config["I2C_BUS_COUNT"] = 1
self.config["HAS_SI5324"] = None
self.comb += platform.request("filtered_clk_sel").eq(1)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ultrascale=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
self.csr_devices.append("i2c")
self.config["I2C_BUS_COUNT"] = 1
self.config["HAS_SI5324"] = None
gth = self.drtio_transceiver.gths[0]
platform.add_period_constraint(gth.txoutclk, rtio_clk_period/2)
@ -433,7 +411,6 @@ def main():
default="sawg",
help="Change type of signal generator. This is used exclusively for "
"development and debugging.")
parser.add_argument("--with-wrpll", default=False, action="store_true")
parser.add_argument("--gateware-identifier-str", default=None,
help="Override ROM identifier")
args = parser.parse_args()
@ -443,13 +420,11 @@ def main():
soc = Satellite(
with_sfp=args.sfp,
jdcg_type=args.jdcg_type,
with_wrpll=args.with_wrpll,
gateware_identifier_str=args.gateware_identifier_str,
**soc_sayma_amc_argdict(args))
elif variant == "simplesatellite":
soc = SimpleSatellite(
with_sfp=args.sfp,
with_wrpll=args.with_wrpll,
gateware_identifier_str=args.gateware_identifier_str,
**soc_sayma_amc_argdict(args))
else:

57
artiq/gateware/targets/sayma_rtm.py
View File

@ -21,7 +21,6 @@ from artiq.gateware.rtio.phy import ttl_simple, ttl_serdes_7series
from artiq.gateware.rtio.xilinx_clocking import RTIOClockMultiplier, fix_serdes_timing_path
from artiq.gateware.drtio.transceiver import gtp_7series
from artiq.gateware.drtio.siphaser import SiPhaser7Series
from artiq.gateware.drtio.wrpll import WRPLL, DDMTDSamplerGTP
from artiq.gateware.drtio.rx_synchronizer import XilinxRXSynchronizer
from artiq.gateware.drtio import *
from artiq.build_soc import add_identifier
@ -34,7 +33,7 @@ class _SatelliteBase(BaseSoC):
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, rtio_clk_freq, *, with_wrpll, gateware_identifier_str, **kwargs):
def __init__(self, rtio_clk_freq, *, gateware_identifier_str, **kwargs):
BaseSoC.__init__(self,
cpu_type="vexriscv",
cpu_bus_width=64,
@ -96,41 +95,23 @@ class _SatelliteBase(BaseSoC):
gtp = self.drtio_transceiver.gtps[0]
rtio_clk_period = 1e9/rtio_clk_freq
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)
if with_wrpll:
self.comb += [
platform.request("filtered_clk_sel").eq(0),
platform.request("ddmtd_main_dcxo_oe").eq(1),
platform.request("ddmtd_helper_dcxo_oe").eq(1)
]
self.submodules.wrpll_sampler = DDMTDSamplerGTP(
self.drtio_transceiver,
platform.request("cdr_clk_clean_fabric"))
self.submodules.wrpll = WRPLL(
helper_clk_pads=platform.request("ddmtd_helper_clk"),
main_dcxo_i2c=platform.request("ddmtd_main_dcxo_i2c"),
helper_dxco_i2c=platform.request("ddmtd_helper_dcxo_i2c"),
ddmtd_inputs=self.wrpll_sampler)
self.csr_devices.append("wrpll")
platform.add_period_constraint(self.wrpll.cd_helper.clk, rtio_clk_period*0.99)
platform.add_false_path_constraints(self.crg.cd_sys.clk, self.wrpll.cd_helper.clk)
platform.add_false_path_constraints(self.wrpll.cd_helper.clk, gtp.rxoutclk)
else:
self.comb += platform.request("filtered_clk_sel").eq(1)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ref_clk=self.crg.cd_sys.clk, ref_div2=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
self.csr_devices.append("i2c")
self.config["I2C_BUS_COUNT"] = 1
self.config["HAS_SI5324"] = None
self.comb += platform.request("filtered_clk_sel").eq(1)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
rx_synchronizer=self.rx_synchronizer,
ref_clk=self.crg.cd_sys.clk, ref_div2=True,
rtio_clk_freq=rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
self.csr_devices.append("i2c")
self.config["I2C_BUS_COUNT"] = 1
self.config["HAS_SI5324"] = None
platform.add_period_constraint(gtp.txoutclk, rtio_clk_period)
platform.add_period_constraint(gtp.rxoutclk, rtio_clk_period)
@ -258,7 +239,6 @@ def main():
soc_sayma_rtm_args(parser)
parser.add_argument("--rtio-clk-freq",
default=150, type=int, help="RTIO clock frequency in MHz")
parser.add_argument("--with-wrpll", default=False, action="store_true")
parser.add_argument("--gateware-identifier-str", default=None,
help="Override ROM identifier")
parser.set_defaults(output_dir=os.path.join("artiq_sayma", "rtm"))
@ -266,7 +246,6 @@ def main():
soc = Satellite(
rtio_clk_freq=1e6*args.rtio_clk_freq,
with_wrpll=args.with_wrpll,
gateware_identifier_str=args.gateware_identifier_str,
**soc_sayma_rtm_argdict(args))
builder = SatmanSoCBuilder(soc, **builder_argdict(args))

0
artiq/gateware/test/wrpll/__init__.py
View File

158
artiq/gateware/test/wrpll/test_dsp.py
View File

@ -1,158 +0,0 @@
import unittest
import numpy as np
from migen import *
from artiq.gateware.drtio.wrpll.ddmtd import Collector
from artiq.gateware.drtio.wrpll import thls, filters
class HelperChainTB(Module):
def __init__(self, N):
self.tag_ref = Signal(N)
self.input_stb = Signal()
self.adpll = Signal((24, True))
self.out_stb = Signal()
###
self.submodules.collector = Collector(N)
self.submodules.loop_filter = thls.make(filters.helper, data_width=48)
self.comb += [
self.collector.tag_ref.eq(self.tag_ref),
self.collector.ref_stb.eq(self.input_stb),
self.collector.main_stb.eq(self.input_stb),
self.loop_filter.input.eq(self.collector.out_helper << 22),
self.loop_filter.input_stb.eq(self.collector.out_stb),
self.adpll.eq(self.loop_filter.output),
self.out_stb.eq(self.loop_filter.output_stb),
]
class TestDSP(unittest.TestCase):
def test_main_collector(self):
N = 2
collector = Collector(N=N)
# check collector phase unwrapping
tags = [(0, 0, 0),
(0, 1, 1),
(2, 1, -1),
(3, 1, -2),
(0, 1, -3),
(1, 1, -4),
(2, 1, -5),
(3, 1, -6),
(3, 3, -4),
(0, 0, -4),
(0, 1, -3),
(0, 2, -2),
(0, 3, -1),
(0, 0, 0)]
for i in range(10):
tags.append((i % (2**N), (i+1) % (2**N), 1))
def generator():
for tag_ref, tag_main, out in tags:
yield collector.tag_ref.eq(tag_ref)
yield collector.tag_main.eq(tag_main)
yield collector.main_stb.eq(1)
yield collector.ref_stb.eq(1)
yield
yield collector.main_stb.eq(0)
yield collector.ref_stb.eq(0)
while not (yield collector.out_stb):
yield
out_main = yield collector.out_main
self.assertEqual(out_main, out)
run_simulation(collector, generator())
def test_helper_collector(self):
N = 3
collector = Collector(N=N)
# check collector phase unwrapping
tags = [((2**N - 1 - tag) % (2**N), -1) for tag in range(20)]
tags += [((tags[-1][0] + 1 + tag) % (2**N), 1) for tag in range(20)]
tags += [((tags[-1][0] - 2 - 2*tag) % (2**N), -2) for tag in range(20)]
def generator():
for tag_ref, out in tags:
yield collector.tag_ref.eq(tag_ref)
yield collector.main_stb.eq(1)
yield collector.ref_stb.eq(1)
yield
yield collector.main_stb.eq(0)
yield collector.ref_stb.eq(0)
while not (yield collector.out_stb):
yield
out_helper = yield collector.out_helper
self.assertEqual(out_helper, out)
run_simulation(collector, generator())
# test helper collector + filter against output from MATLAB model
def test_helper_chain(self):
pll = HelperChainTB(15)
initial_helper_out = -8000
ref_tags = np.array([
24778, 16789, 8801, 814, 25596, 17612, 9628, 1646,
26433, 18453, 10474, 2496, 27287, 19311, 11337, 3364, 28160,
20190, 12221, 4253, 29054, 21088, 13124, 5161, 29966, 22005,
14045, 6087, 30897, 22940, 14985, 7031, 31847, 23895, 15944,
7995, 47, 24869, 16923, 8978, 1035, 25861, 17920, 9981,
2042, 26873, 18937, 11002, 3069, 27904, 19973, 12042, 4113,
28953, 21026, 13100, 5175, 30020, 22098, 14177, 6257, 31106,
23189, 15273, 7358, 32212, 24300, 16388, 8478, 569, 25429,
17522, 9617, 1712, 26577, 18675, 10774, 2875, 27745, 19848,
11951, 4056, 28930, 21038, 13147, 5256, 30135, 22247, 14361,
6475, 31359, 23476, 15595, 7714, 32603, 24725, 16847, 8971,
1096
])
adpll_sim = np.array([
8, 24, 41, 57, 74, 91, 107, 124, 140, 157, 173,
190, 206, 223, 239, 256, 273, 289, 306, 322, 339, 355,
372, 388, 405, 421, 438, 454, 471, 487, 504, 520, 537,
553, 570, 586, 603, 619, 636, 652, 668, 685, 701, 718,
734, 751, 767, 784, 800, 817, 833, 850, 866, 882, 899,
915, 932, 948, 965, 981, 998, 1014, 1030, 1047, 1063, 1080,
1096, 1112, 1129, 1145, 1162, 1178, 1194, 1211, 1227, 1244, 1260,
1276, 1293, 1309, 1326, 1342, 1358, 1375, 1391, 1407, 1424, 1440,
1457, 1473, 1489, 1506, 1522, 1538, 1555, 1571, 1587, 1604, 1620,
1636])
def sim():
yield pll.collector.out_helper.eq(initial_helper_out)
for ref_tag, adpll_matlab in zip(ref_tags, adpll_sim):
# feed collector
yield pll.tag_ref.eq(int(ref_tag))
yield pll.input_stb.eq(1)
yield
yield pll.input_stb.eq(0)
while not (yield pll.collector.out_stb):
yield
tag_diff = yield pll.collector.out_helper
while not (yield pll.loop_filter.output_stb):
yield
adpll_migen = yield pll.adpll
self.assertEqual(adpll_migen, adpll_matlab)
yield
run_simulation(pll, [sim()])

55
artiq/gateware/test/wrpll/test_thls.py
View File

@ -1,55 +0,0 @@
import unittest
from migen import *
from artiq.gateware.drtio.wrpll import thls
a = 0
def simple_test(x):
global a
a = a + (x*4 >> 1)
return a
class TestTHLS(unittest.TestCase):
def test_thls(self):
global a
proc = thls.Processor()
a = 0
cp = thls.compile(proc, simple_test)
print("Program:")
cp.pretty_print()
cp.dimension_processor()
print("Encoded program:", cp.encode())
proc_impl = proc.implement(cp.encode(), cp.data)
def send_values(values):
for value in values:
yield proc_impl.input.eq(value)
yield proc_impl.input_stb.eq(1)
yield
yield proc_impl.input.eq(0)
yield proc_impl.input_stb.eq(0)
yield
while (yield proc_impl.busy):
yield
@passive
def receive_values(callback):
while True:
while not (yield proc_impl.output_stb):
yield
callback((yield proc_impl.output))
yield
send_list = [42, 40, 10, 10]
receive_list = []
run_simulation(proc_impl, [send_values(send_list), receive_values(receive_list.append)])
print("Execution:", send_list, "->", receive_list)
a = 0
expected_list = [simple_test(x) for x in send_list]
self.assertEqual(receive_list, expected_list)

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