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firmware: allow building without system UART.

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This commit is contained in:
whitequark 2018-03-14 18:34:31 +00:00
parent 158ceb0881
commit 9ea7d7a804
3 changed files with 21 additions and 10 deletions
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1
artiq/firmware/libboard/lib.rs
View File

@ -18,6 +18,7 @@ include!(concat!(env!("BUILDINC_DIRECTORY"), "/generated/sdram_phy.rs"));
pub mod sdram;
pub mod ident;
pub mod clock;
#[cfg(has_uart)]
pub mod uart;
#[cfg(has_spiflash)]
pub mod spiflash;

10
artiq/firmware/libboard/uart_console.rs
View File

@ -1,16 +1,24 @@
use core::fmt;
use csr;
pub struct Console;
impl fmt::Write for Console {
#[cfg(has_uart)]
fn write_str(&mut self, s: &str) -> Result<(), fmt::Error> {
use csr;
for c in s.bytes() {
unsafe {
while csr::uart::txfull_read() != 0 {}
csr::uart::rxtx_write(c)
}
}
Ok(())
}
#[cfg(not(has_uart))]
fn write_str(&mut self, _s: &str) -> Result<(), fmt::Error> {
Ok(())
}
}

20
artiq/firmware/runtime/main.rs
View File

@ -77,17 +77,19 @@ fn startup() {
#[cfg(has_serwb_phy_amc)]
board_artiq::serwb::wait_init();
let t = board::clock::get_ms();
info!("press 'e' to erase startup and idle kernels...");
while board::clock::get_ms() < t + 1000 {
if unsafe { board::csr::uart::rxtx_read() == b'e' } {
config::remove("startup_kernel").unwrap();
config::remove("idle_kernel").unwrap();
info!("startup and idle kernels erased");
break
#[cfg(has_uart)] {
let t = board::clock::get_ms();
info!("press 'e' to erase startup and idle kernels...");
while board::clock::get_ms() < t + 1000 {
if unsafe { board::csr::uart::rxtx_read() == b'e' } {
config::remove("startup_kernel").unwrap();
config::remove("idle_kernel").unwrap();
info!("startup and idle kernels erased");
break
}
}
info!("continuing boot");
}
info!("continuing boot");
#[cfg(has_i2c)]
board_artiq::i2c::init();