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firmware: simplify SYSREF DRTIO alignment

This commit is contained in:
Sebastien Bourdeauducq 2018-07-26 19:37:59 +08:00
parent f8c17528e7
commit 446f791180
4 changed files with 18 additions and 31 deletions
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8
artiq/firmware/libboard_artiq/hmc830_7043.rs
View File

@ -156,10 +156,10 @@ pub mod hmc7043 {
use board_misoc::{csr, clock};
// All frequencies assume 1.2GHz HMC830 output
pub const DAC_CLK_DIV: u16 = 2; // 600MHz
pub const FPGA_CLK_DIV: u16 = 8; // 150MHz
pub const SYSREF_DIV: u16 = 128; // 9.375MHz
pub const HMC_SYSREF_DIV: u16 = SYSREF_DIV*8; // 1.171875MHz (must be <= 4MHz)
const DAC_CLK_DIV: u16 = 2; // 600MHz
const FPGA_CLK_DIV: u16 = 8; // 150MHz
const SYSREF_DIV: u16 = 128; // 9.375MHz
const HMC_SYSREF_DIV: u16 = SYSREF_DIV*8; // 1.171875MHz (must be <= 4MHz)
// enabled, divider, output config
const OUTPUT_CONFIG: [(bool, u16, u8); 14] = [

11
artiq/firmware/libboard_artiq/jesd204sync.rs
View File

@ -67,8 +67,8 @@ fn sysref_cal_fpga() -> Result<u16, &'static str> {
return Err("failed to reach 1->0 transition with fine delay");
}
fn sysref_rtio_align(phase_offset: u16, expected_align: u16) -> Result<(), &'static str> {
// This needs to take place once before DAC SYSREF scan, as
fn sysref_rtio_align(phase_offset: u16) -> Result<(), &'static str> {
// This needs to take place before DAC SYSREF scan, as
// the HMC7043 input clock (which defines slip resolution)
// is 2x the DAC clock, so there are two possible phases from
// the divider states. This deterministically selects one.
@ -96,9 +96,6 @@ fn sysref_rtio_align(phase_offset: u16, expected_align: u16) -> Result<(), &'sta
}
}
info!(" ...done ({}/{} slips)", slips0, slips1);
if (slips0 + slips1) % expected_align != 0 {
return Err("unexpected slip alignment");
}
let mut margin_minus = None;
for d in 0..phase_offset {
@ -127,7 +124,7 @@ fn sysref_rtio_align(phase_offset: u16, expected_align: u16) -> Result<(), &'sta
Ok(())
}
pub fn sysref_auto_rtio_align(expected_align: u16) -> Result<(), &'static str> {
pub fn sysref_auto_rtio_align() -> Result<(), &'static str> {
let entry = config::read_str("sysref_phase_fpga", |r| r.map(|s| s.parse()));
let phase_offset = match entry {
Ok(Ok(phase)) => phase,
@ -139,7 +136,7 @@ pub fn sysref_auto_rtio_align(expected_align: u16) -> Result<(), &'static str> {
phase
}
};
sysref_rtio_align(phase_offset, expected_align)
sysref_rtio_align(phase_offset)
}
fn sysref_cal_dac(dacno: u8) -> Result<u16, &'static str> {

2
artiq/firmware/runtime/main.rs
View File

@ -112,7 +112,7 @@ fn startup() {
{
board_artiq::ad9154::jesd_unreset();
board_artiq::ad9154::init();
if let Err(e) = board_artiq::jesd204sync::sysref_auto_rtio_align(1) {
if let Err(e) = board_artiq::jesd204sync::sysref_auto_rtio_align() {
error!("failed to align SYSREF at FPGA: {}", e);
}
if let Err(e) = board_artiq::jesd204sync::sysref_auto_dac_align() {

28
artiq/firmware/satman/main.rs
View File

@ -274,7 +274,10 @@ pub extern fn main() -> i32 {
}
#[cfg(has_ad9154)]
let mut ad9154_initialized = false;
{
board_artiq::ad9154::jesd_unreset();
board_artiq::ad9154::init();
}
#[cfg(has_allaki_atts)]
board_artiq::hmc542::program_all(8/*=4dB*/);
@ -285,34 +288,21 @@ pub extern fn main() -> i32 {
info!("link is up, switching to recovered clock");
si5324::siphaser::select_recovered_clock(true).expect("failed to switch clocks");
si5324::siphaser::calibrate_skew(SIPHASER_PHASE).expect("failed to calibrate skew");
#[cfg(has_ad9154)]
{
if !ad9154_initialized {
board_artiq::ad9154::jesd_unreset();
board_artiq::ad9154::init();
if let Err(e) = board_artiq::jesd204sync::sysref_auto_rtio_align(1) {
error!("failed to align SYSREF at FPGA: {}", e);
}
if let Err(e) = board_artiq::jesd204sync::sysref_auto_dac_align() {
error!("failed to align SYSREF at DAC: {}", e);
}
ad9154_initialized = true;
}
}
drtioaux::reset(0);
drtio_reset(false);
drtio_reset_phy(false);
while drtio_link_rx_up() {
process_errors();
process_aux_packets();
#[cfg(has_hmc830_7043)]
#[cfg(has_ad9154)]
{
if drtio_tsc_loaded() {
// Expected alignment: 1 RTIO clock period
if let Err(e) = board_artiq::jesd204sync::sysref_auto_rtio_align(
hmc830_7043::hmc7043::FPGA_CLK_DIV) {
if let Err(e) = board_artiq::jesd204sync::sysref_auto_rtio_align() {
error!("failed to align SYSREF at FPGA: {}", e);
}
if let Err(e) = board_artiq::jesd204sync::sysref_auto_dac_align() {
error!("failed to align SYSREF at DAC: {}", e);
}
}
}
}