firmware: add HMC542 (Allaki) support.

This commit is contained in:
whitequark 2018-01-19 04:39:16 +00:00
parent bdf41cd574
commit 1f82ceaa85
3 changed files with 58 additions and 0 deletions

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@ -0,0 +1,54 @@
use board::{csr, clock};
const PIN_LE: u32 = 1 << 0;
const PIN_SIN: u32 = 1 << 1;
const PIN_CLK: u32 = 1 << 2;
const PIN_RST_N: u32 = 1 << 3;
const PIN_RST: u32 = PIN_RST_N;
const CARDS: usize = 4;
const CHANNELS: usize = 2;
fn set_pins(card_index: usize, chan_index: usize, pins: u32) {
let pins = pins ^ PIN_RST_N;
let shift = card_index * 2 + chan_index;
unsafe {
let state = csr::allaki_atts::out_read();
let state = state & !(0xf << shift);
let state = state | (pins << shift);
csr::allaki_atts::out_write(state);
}
clock::spin_us(100);
}
/// Attenuation is in units of 0.5dB, from 0dB (0) to 31.5dB (63).
pub fn program(card_index: usize, chan_index: usize, atten: u8) {
assert!(card_index < 4 && chan_index < 2);
// 0b111111 = 1dB
// 0b111110 = 0.5dB
// 0b111101 = 1dB
// ...
// 0b011111 = 16dB
// 0b000000 = 31.5dB
let atten = !(atten << 2);
let set_pins = |pins| set_pins(card_index, chan_index, pins);
set_pins(PIN_RST);
set_pins(0);
for n in 0..8 {
let sin = if atten & 1 << n != 0 { PIN_SIN } else { 0 };
set_pins(sin);
set_pins(sin | PIN_CLK);
}
set_pins(PIN_LE);
}
/// See `program`.
pub fn program_all(atten: u8) {
for card in 0..CARDS {
for chan in 0..CHANNELS {
program(card, chan, atten)
}
}
}

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@ -23,3 +23,5 @@ pub mod hmc830_7043;
mod ad9154_reg;
#[cfg(has_ad9154)]
pub mod ad9154;
#[cfg(has_allaki_atts)]
pub mod hmc542;

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@ -95,6 +95,8 @@ fn startup() {
board_artiq::hmc830_7043::init().expect("cannot initialize HMC830/7043");
#[cfg(has_ad9154)]
board_artiq::ad9154::init().expect("cannot initialize AD9154");
#[cfg(has_allaki_atts)]
board_artiq::hmc542::program_all(8/*=4dB*/);
#[cfg(has_ethmac)]
startup_ethernet();