Module f3::examples::_06_serial_echo [−][src]
Serial interface echo server
In this example every received byte will be sent back to the sender. You can test this example
with serial terminal emulator like minicom
.
#![deny(unsafe_code)] #![deny(warnings)] #![no_main] #![no_std] #[macro_use(entry, exception)] extern crate cortex_m_rt as rt; extern crate f3; #[macro_use(block)] extern crate nb; extern crate panic_semihosting; use f3::hal::prelude::*; use f3::hal::serial::Serial; use f3::hal::stm32f30x; use rt::ExceptionFrame; entry!(main); fn main() -> ! { let p = stm32f30x::Peripherals::take().unwrap(); let mut flash = p.FLASH.constrain(); let mut rcc = p.RCC.constrain(); let mut gpioa = p.GPIOA.split(&mut rcc.ahb); let clocks = rcc.cfgr.freeze(&mut flash.acr); let tx = gpioa.pa9.into_af7(&mut gpioa.moder, &mut gpioa.afrh); let rx = gpioa.pa10.into_af7(&mut gpioa.moder, &mut gpioa.afrh); let serial = Serial::usart1(p.USART1, (tx, rx), 115_200.bps(), clocks, &mut rcc.apb2); let (mut tx, mut rx) = serial.split(); loop { let byte = block!(rx.read()).unwrap(); block!(tx.write(byte)).ok(); } } exception!(HardFault, hard_fault); fn hard_fault(ef: &ExceptionFrame) -> ! { panic!("{:#?}", ef); } exception!(*, default_handler); fn default_handler(irqn: i16) { panic!("Unhandled exception (IRQn = {})", irqn); }