forked from M-Labs/artiq
slave_fpga: use sayma_rtm magic
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de63e657b8
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@ -28,46 +28,49 @@ pub fn load() -> Result<(), &'static str> {
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info!("Loading slave FPGA gateware...");
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let header = unsafe { slice::from_raw_parts(GATEWARE, 8) };
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let magic = BigEndian::read_u32(&header[0..]);
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let length = BigEndian::read_u32(&header[4..]) as usize;
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if magic != 0x53415231 { // "SAR1"
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return Err("Slave FPGA gateware magic not found");
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} else if length > 0x220000 {
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return Err("Slave FPGA gateware too large (corrupted?)");
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let magic = BigEndian::read_u32(&header[0..]);
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info!("Magic: 0x{:08x}", magic);
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if magic != 0x5352544d { // "SRTM", see sayma_rtm target as well
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return Err("Bad magic");
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}
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let length = BigEndian::read_u32(&header[4..]) as usize;
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info!("Length: 0x{:08x}", length);
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if length > 0x220000 {
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return Err("Too large (corrupted?)");
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}
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info!("Slave FPGA gateware length: 0x{:06x}", length);
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unsafe {
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if csr::slave_fpga_cfg::in_read() & DONE_BIT != 0 {
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info!("Slave FPGA is DONE before loading");
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info!("DONE before loading");
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}
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csr::slave_fpga_cfg::out_write(0);
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csr::slave_fpga_cfg::oe_write(CCLK_BIT | DIN_BIT | PROGRAM_B_BIT);
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clock::spin_us(1_000); // TPROGRAM=250ns min, be_generous
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if csr::slave_fpga_cfg::in_read() & INIT_B_BIT != 0 {
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return Err("Slave FPGA did not react to PROGRAM.");
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return Err("Did not react to PROGRAM");
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}
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csr::slave_fpga_cfg::out_write(PROGRAM_B_BIT);
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clock::spin_us(10_000); // TPL=5ms max
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if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
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return Err("Slave FPGA did not finish INITialization.");
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return Err("Did not exit INIT");
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}
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for i in slice::from_raw_parts(GATEWARE.offset(8), length) {
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shift_u8(*i);
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if csr::slave_fpga_cfg::in_read() & INIT_B_BIT == 0 {
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return Err("Slave FPGA error: INIT_B went low.");
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return Err("INIT asserted during load");
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}
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}
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let t = clock::get_ms();
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while csr::slave_fpga_cfg::in_read() & DONE_BIT == 0 {
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if clock::get_ms() > t + 100 {
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error!("Slave FPGA not DONE after loading");
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error!("Corrupt gateware? Slave FPGA in slave serial mode?");
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return Err("Slave FPGA not DONE");
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error!("Timeout wating for DONE after loading");
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error!("Boards not populated correctly?");
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return Err("Not DONE");
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}
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shift_u8(0xff);
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}
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@ -319,7 +319,7 @@ def main():
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bin_file.write(b"\x00"*8)
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bit2bin(bit_file, bin_file)
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if header:
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magic = 0x53415231 # "SAR1"
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magic = 0x5352544d # "SRTM", see sayma_rtm target
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length = bin_file.tell() - 8
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bin_file.seek(0)
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bin_file.write(magic.to_bytes(4, byteorder="big"))
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