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cxp downconn fw: add drp example

This commit is contained in:
morgan 2024-08-12 16:48:20 +08:00
parent bfc8f065f7
commit 5dfef7e457
1 changed files with 39 additions and 27 deletions
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60
src/libboard_artiq/src/cxp_downconn.rs
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@ -65,39 +65,31 @@ fn loopback_testing(timer: &mut GlobalTimer, data: u8, control_bit: u8) {
csr::cxp::downconn_txenable_write(1);
info!("waiting for rx to align...");
timer.delay_us(50_000);
// timer.delay_us(50_000);
// while csr::cxp::downconn_rx_ready_read() != 1 {}
// info!("rx ready!");
info!("rx ready!");
// csr::cxp::data_3_write(data);
// csr::cxp::control_bit_3_write(control_bit);
// println!(
// "data[0] = {:#04x} control bit = {:#b} encoded = {:#012b}",
// csr::cxp::downconn_data_0_read(),
// csr::cxp::downconn_control_bit_0_read(),
// csr::cxp::downconn_encoded_0_read(),
// );
// println!(
// "data[1] = {:#04x} control bit = {:#b} encoded = {:#012b}",
// csr::cxp::downconn_data_1_read(),
// csr::cxp::downconn_control_bit_1_read(),
// csr::cxp::downconn_encoded_1_read(),
// );
println!("0xA8 = {:#06x}", read(0x62));
write(0x62, 0x001A);
println!("0xA8 = {:#06x}", read(0x62));
println!("shifted = {}", csr::cxp::downconn_shifted_read());
// for _ in 0..20 {
loop {
let data0 = csr::cxp::downconn_rxdata_0_read();
// let data1 = csr::cxp::downconn_rxdata_1_read();
let rxready = csr::cxp::downconn_rx_ready_read();
// timer.delay_us(100);
// timer.delay_us(1_000_000);
if data0 == 0b0101111100 || data0 == 0b1010000011 {
println!(
"data = {:#022b} | rx ready = {}",
(csr::cxp::downconn_rxdata_0_read() as u32 | ((csr::cxp::downconn_rxdata_1_read() as u32) << 10)),
csr::cxp::downconn_rx_ready_read()
"data[0] = {:#012b} comma = {} | rx ready = {}",
data0,
data0 == 0b0101111100 || data0 == 0b1010000011,
rxready,
);
timer.delay_us(1_000_000);
// println!(
// "data[0] = {:#012b} data[1] = {:#012b}",
// csr::cxp::rxdata_0_read(),
// csr::cxp::rxdata_1_read(),
// );
}
// println!(
// "decoded_data[0] = {:#04x} decoded_k[0] = {:#b} decoded_data[1] = {:#04x} decoded_k[1] = {:#b}",
// csr::cxp::downconn_decoded_data_0_read(),
@ -175,6 +167,26 @@ fn change_qpll_settings(speed: CXP_SPEED) {
}
}
fn read(address: u16) -> u16 {
// DEBUG: DRPCLK need to be on for a few cycle before accessing other DRP ports
unsafe {
csr::cxp::downconn_gtx_daddr_write(address);
csr::cxp::downconn_gtx_dread_write(1);
while (csr::cxp::downconn_gtx_dready_read() != 1) {}
csr::cxp::downconn_gtx_dout_read()
}
}
fn write(address: u16, value: u16) {
// DEBUG: DRPCLK need to be on for a few cycle before accessing other DRP ports
unsafe {
csr::cxp::downconn_gtx_daddr_write(address);
csr::cxp::downconn_gtx_din_write(value);
csr::cxp::downconn_gtx_din_stb_write(1);
while (csr::cxp::downconn_gtx_dready_read() != 1) {}
}
}
pub mod txusrclk {
use super::*;