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slave_fpga: check DONE before loading

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This commit is contained in:
Robert Jördens 2018-03-01 19:52:27 +08:00
parent a04a36ee36
commit abd160d143
1 changed files with 6 additions and 3 deletions
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9
artiq/firmware/libboard_artiq/slave_fpga.rs
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@ -39,17 +39,20 @@ pub fn load() -> Result<(), &'static str> {
info!("Slave FPGA gateware length: 0x{:06x}", length);
unsafe {
csr::slave_fpga_cfg::oe_write(CCLK_BIT | DIN_BIT | PROGRAM_B_BIT);
if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 {
info!("Slave FPGA is DONE before loading");
}
csr::slave_fpga_cfg::out_write(0);
csr::slave_fpga_cfg::oe_write(CCLK_BIT | DIN_BIT | PROGRAM_B_BIT);
clock::spin_us(1_000); // TPROGRAM=250ns min, be_generous
if csr::slave_fpga_cfg::in_read() & INIT_B_BIT != 0 {
return Err("Slave FPGA did not react to PROGRAM.");
}
csr::slave_fpga_cfg::out_write(PROGRAM_B_BIT);
clock::spin_us(5_000); // TPL=5ms max
clock::spin_us(10_000); // TPL=5ms max
if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
return Err("Slave FPGA did finish INITialization.");
return Err("Slave FPGA did not finish INITialization.");
}
for i in slice::from_raw_parts(GATEWARE.offset(8), length) {