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firmware: wait for HMC830 lock

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This commit is contained in:
Sebastien Bourdeauducq 2017-10-04 01:42:57 +08:00
parent fd3a09dd4d
commit a89b053473
1 changed files with 11 additions and 1 deletions
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12
artiq/firmware/libboard/hmc830_7043.rs
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@ -10,6 +10,8 @@
* sysref clock: 15.625MHz (div=64)
*/
use clock;
mod hmc830 {
use csr;
@ -74,7 +76,7 @@ mod hmc830 {
pub fn init() -> Result<(), &'static str> {
spi_setup();
let id = read(0);
let id = read(0x00);
if id != 0xa7975 {
error!("invalid HMC830 ID: 0x{:08x}", id);
return Err("invalid HMC830 identification");
@ -82,6 +84,14 @@ mod hmc830 {
for &(addr, data) in HMC830_WRITES.iter() {
write(addr, data);
}
let t = clock::get_ms();
while read(0x12) & 0x02 == 0 {
if clock::get_ms() > t + 2000 {
return Err("HMC830 lock timeout");
}
}
Ok(())
}
}