45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
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//! UART example application. Sends a test string over a UART and then enters
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//! echo mode
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#![no_main]
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#![no_std]
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use core::fmt::Write;
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use cortex_m_rt::entry;
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use panic_rtt_target as _;
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use rtt_target::{rprintln, rtt_init_print};
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use va108xx_hal::{gpio::PinsB, pac, prelude::*, uart};
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#[entry]
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fn main() -> ! {
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rtt_init_print!();
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rprintln!("-- VA108xx UART example application--");
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let mut dp = pac::Peripherals::take().unwrap();
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let gpiob = PinsB::new(&mut dp.SYSCONFIG, Some(dp.IOCONFIG), dp.PORTB);
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let tx = gpiob.pb21.into_funsel_1();
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let rx = gpiob.pb20.into_funsel_1();
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let uartb = uart::Uart::uartb(
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dp.UARTB,
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(tx, rx),
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115200.bps(),
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&mut dp.SYSCONFIG,
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50.mhz(),
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);
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let (mut tx, mut rx) = uartb.split();
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writeln!(tx, "Hello World\r").unwrap();
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loop {
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// Echo what is received on the serial link.
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match rx.read() {
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Ok(recv) => {
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nb::block!(tx.write(recv)).expect("TX send error");
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}
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Err(nb::Error::WouldBlock) => (),
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Err(nb::Error::Other(uart_error)) => {
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rprintln!("UART receive error {:?}", uart_error);
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}
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}
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}
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}
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