occheung/artiq
1
0
Fork 0
forked from M-Labs/artiq
Code Pull Requests Activity

jesd204sync: improve messaging

Browse Source
This commit is contained in:
Sebastien Bourdeauducq 2019-01-28 18:08:20 +08:00
parent 3acee87df2
commit ba21dc8498
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
artiq/firmware/libboard_artiq/jesd204sync.rs
View File

@ -187,6 +187,7 @@ fn reach_sysref_ddmtd_target(target: i32, tolerance: i32) -> Result<(), &'static
}
fn calibrate_sysref_target(rising_average: i32, falling_average: i32) -> Result<i32, &'static str> {
info!("calibrating SYSREF DDMTD target phase...");
let coarse_target =
if rising_average < falling_average {
(rising_average + falling_average)/2
@ -196,7 +197,7 @@ fn calibrate_sysref_target(rising_average: i32, falling_average: i32) -> Result<
info!(" SYSREF calibration coarse target: {}", coarse_target);
reach_sysref_ddmtd_target(coarse_target, 4)?;
let target = measure_ddmdt_phase();
info!("SYSREF calibrated target: {}", target);
info!(" ...done, target={}", target);
Ok(target)
}
@ -215,13 +216,14 @@ fn sysref_slip_rtio_cycle() {
}
pub fn sysref_rtio_align() -> Result<(), &'static str> {
info!("aligning SYSREF with RTIO TSC...");
let mut previous_sample = sysref_get_sample()?;
let mut nslips = 0;
loop {
sysref_slip_rtio_cycle();
let sample = sysref_get_sample()?;
if sample && !previous_sample {
info!("SYSREF aligned with RTIO TSC");
info!(" ...done");
return Ok(())
}
previous_sample = sample;
@ -238,6 +240,7 @@ pub fn sysref_auto_rtio_align() -> Result<(), &'static str> {
test_ddmtd_stability(false, 1)?;
test_slip_ddmtd()?;
info!("determining SYSREF S/H limits...");
let sysref_sh_limits = measure_sysref_sh_limits()?;
let rising_average = average_phases(&sysref_sh_limits.rising_phases, SYSREF_SH_MOD);
let falling_average = average_phases(&sysref_sh_limits.falling_phases, SYSREF_SH_MOD);
@ -254,6 +257,7 @@ pub fn sysref_auto_rtio_align() -> Result<(), &'static str> {
if rising_max_deviation > 4 || falling_max_deviation > 4 {
return Err("excessive SYSREF S/H limit deviation");
}
info!(" ...done");
let entry = config::read_str("sysref_ddmtd_phase_fpga", |r| r.map(|s| s.parse()));
let target_phase = match entry {
@ -270,10 +274,12 @@ pub fn sysref_auto_rtio_align() -> Result<(), &'static str> {
}
};
info!("aligning SYSREF with RTIO clock...");
reach_sysref_ddmtd_target(target_phase, 3)?;
if sysref_sh_error() {
return Err("SYSREF does not meet S/H timing at DDMTD phase target");
}
info!(" ...done");
sysref_rtio_align()?;