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libboard_artiq/ad9154: fix prbs test (only keep prbs7) and 

always do it after ad9154 initialization
pull/922/head
Florent Kermarrec 2018-01-18 08:19:37 +01:00
parent 8ec33ae7bd
commit 07f4e2e35a
1 changed files with 36 additions and 22 deletions
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58
artiq/firmware/libboard_artiq/ad9154.rs
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@ -131,7 +131,7 @@ const JESD_SETTINGS: JESDSettings = JESDSettings {
jesdv: 1
};
fn dac_setup(linerate: u64) -> Result<(), &'static str> {
fn dac_setup(dacno: u8, linerate: u64) -> Result<(), &'static str> {
// reset
write(ad9154_reg::SPI_INTFCONFA,
1*ad9154_reg::SOFTRESET_M | 1*ad9154_reg::SOFTRESET |
@ -148,10 +148,10 @@ fn dac_setup(linerate: u64) -> Result<(), &'static str> {
if (read(ad9154_reg::PRODIDH) as u16) << 8 | (read(ad9154_reg::PRODIDL) as u16) != 0x9154 {
return Err("AD9154 not found");
} else {
info!("AD9154 found");
info!("AD9154-{} found", dacno);
}
info!("AD9154 configuration...");
info!("AD9154-{} configuration...", dacno);
write(ad9154_reg::PWRCNTRL0,
0*ad9154_reg::PD_DAC0 | 0*ad9154_reg::PD_DAC1 |
0*ad9154_reg::PD_DAC2 | 0*ad9154_reg::PD_DAC3 |
@ -488,37 +488,40 @@ fn dac_monitor() {
write(ad9154_reg::IRQ_STATUS3, 0x00);
}
#[allow(dead_code)]
fn dac_prbs(dacno: u8, p: u8, t: u32) {
/* follow phy prbs testing (p58 of ad9154 datasheet) */
fn dac_prbs(dacno: u8) -> Result<(), &'static str> {
let mut prbs_errors: u32 = 0;
/* step 1: start sending prbs pattern from the transmitter */
/* follow phy prbs testing (p58 of ad9154 datasheet) */
info!("AD9154-{} PRBS test", dacno);
/* step 1: start sending prbs7 pattern from the transmitter */
jesd_prbs(dacno, true);
clock::spin_us(500000);
/* step 2: select prbs mode */
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL);
0b00*ad9154_reg::PHY_PRBS_PAT_SEL);
/* step 3: enable test for all lanes */
write(ad9154_reg::PHY_PRBS_TEST_EN, 0xff);
/* step 4: reset */
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL |
0b00*ad9154_reg::PHY_PRBS_PAT_SEL |
1*ad9154_reg::PHY_TEST_RESET);
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL);
0b00*ad9154_reg::PHY_PRBS_PAT_SEL);
/* step 5: prbs threshold */
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_LOBITS, t as u8);
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_MIDBITS, (t >> 8) as u8);
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_HIBITS, (t >> 16) as u8);
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_LOBITS, 0);
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_MIDBITS, 0);
write(ad9154_reg::PHY_PRBS_TEST_THRESHOLD_HIBITS, 0);
/* step 6: start */
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL);
0b00*ad9154_reg::PHY_PRBS_PAT_SEL);
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL |
0b00*ad9154_reg::PHY_PRBS_PAT_SEL |
1*ad9154_reg::PHY_TEST_START);
/* step 7: wait 500 ms */
@ -526,21 +529,29 @@ fn dac_prbs(dacno: u8, p: u8, t: u32) {
/* step 8 : stop */
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
p*ad9154_reg::PHY_PRBS_PAT_SEL);
0b00*ad9154_reg::PHY_PRBS_PAT_SEL);
info!("prbs_status: {:02x}", read(ad9154_reg::PHY_PRBS_TEST_STATUS));
for i in 0..8 {
let mut lane_errors: u32 = 0;
/* step 9.a: select src err */
write(ad9154_reg::PHY_PRBS_TEST_CTRL,
i*ad9154_reg::PHY_SRC_ERR_CNT);
/* step 9.b: retrieve number of errors */
info!("prbs errors[{}]: {:06x}", i,
(read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_LOBITS) as u32) |
((read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_MIDBITS) as u32) << 8) |
((read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_HIBITS) as u32) << 16));
lane_errors = (read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_LOBITS) as u32) |
((read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_MIDBITS) as u32) << 8) |
((read(ad9154_reg::PHY_PRBS_TEST_ERRCNT_HIBITS) as u32) << 16);
if lane_errors > 0 {
warn!("AD9154-{} PRBS errors on lane{}: {:06x}", dacno, i, lane_errors);
}
prbs_errors += lane_errors
}
jesd_prbs(dacno, false);
if prbs_errors > 0 {
return Err("AD9154 PRBS failed")
}
Ok(())
}
fn dac_cfg(dacno: u8) -> Result<(), &'static str> {
@ -550,7 +561,7 @@ fn dac_cfg(dacno: u8) -> Result<(), &'static str> {
jesd_stpl(dacno, false);
clock::spin_us(10000);
jesd_enable(dacno, true);
dac_setup(6_000_000_000)?;
dac_setup(dacno, 6_000_000_000)?;
jesd_enable(dacno, false);
clock::spin_us(10000);
jesd_enable(dacno, true);
@ -601,6 +612,9 @@ pub fn init() -> Result<(), &'static str> {
let dacno = dacno as u8;
debug!("setting up AD9154-{} DAC...", dacno);
dac_cfg_retry(dacno)?;
dac_prbs(dacno)?;
dac_cfg_retry(dacno)?;
}
Ok(())
}