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slave_fpga: use sayma_rtm magic

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This commit is contained in:
Robert Jördens 2018-03-01 18:32:19 +01:00
parent de63e657b8
commit 1c57d27ae2
2 changed files with 18 additions and 15 deletions
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31
artiq/firmware/libboard_artiq/slave_fpga.rs
View File

@ -28,46 +28,49 @@ pub fn load() -> Result<(), &'static str> {
info!("Loading slave FPGA gateware...");
let header = unsafe { slice::from_raw_parts(GATEWARE, 8) };
let magic = BigEndian::read_u32(&header[0..]);
let length = BigEndian::read_u32(&header[4..]) as usize;
if magic != 0x53415231 { // "SAR1"
return Err("Slave FPGA gateware magic not found");
} else if length > 0x220000 {
return Err("Slave FPGA gateware too large (corrupted?)");
let magic = BigEndian::read_u32(&header[0..]);
info!("Magic: 0x{:08x}", magic);
if magic != 0x5352544d { // "SRTM", see sayma_rtm target as well
return Err("Bad magic");
}
let length = BigEndian::read_u32(&header[4..]) as usize;
info!("Length: 0x{:08x}", length);
if length > 0x220000 {
return Err("Too large (corrupted?)");
}
info!("Slave FPGA gateware length: 0x{:06x}", length);
unsafe {
if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 {
info!("Slave FPGA is DONE before loading");
info!("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.");
return Err("Did not react to PROGRAM");
}
csr::slave_fpga_cfg::out_write(PROGRAM_B_BIT);
clock::spin_us(10_000); // TPL=5ms max
if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
return Err("Slave FPGA did not finish INITialization.");
return Err("Did not exit INIT");
}
for i in slice::from_raw_parts(GATEWARE.offset(8), length) {
shift_u8(*i);
if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
return Err("Slave FPGA error: INIT_B went low.");
return Err("INIT asserted during load");
}
}
let t = clock::get_ms();
while csr::slave_fpga_cfg::in_read() & DONE_BIT == 0 {
if clock::get_ms() > t + 100 {
error!("Slave FPGA not DONE after loading");
error!("Corrupt gateware? Slave FPGA in slave serial mode?");
return Err("Slave FPGA not DONE");
error!("Timeout wating for DONE after loading");
error!("Boards not populated correctly?");
return Err("Not DONE");
}
shift_u8(0xff);
}

2
artiq/frontend/artiq_flash.py
View File

@ -319,7 +319,7 @@ def main():
bin_file.write(b"\x00"*8)
bit2bin(bit_file, bin_file)
if header:
magic = 0x53415231 # "SAR1"
magic = 0x5352544d # "SRTM", see sayma_rtm target
length = bin_file.tell() - 8
bin_file.seek(0)
bin_file.write(magic.to_bytes(4, byteorder="big"))