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stm32 uart: Add a test for blocking RX overflow

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This commit is contained in:
Timo Kröger 2023-05-14 21:59:10 +02:00
parent 977a7906e4
commit 3e9d5978c0
1 changed files with 21 additions and 1 deletions
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22
tests/stm32/src/bin/usart.rs
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@ -8,7 +8,7 @@ use defmt::assert_eq;
use embassy_executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::interrupt;
use embassy_stm32::usart::{Config, Uart};
use embassy_stm32::usart::{Config, Error, Uart};
use embassy_time::{Duration, Instant};
use example_common::*;
@ -53,6 +53,26 @@ async fn main(_spawner: Spawner) {
assert_eq!(buf, data);
}
// Test error handling with with an overflow error
{
let config = Config::default();
let mut usart = Uart::new(&mut usart, &mut rx, &mut tx, &mut irq, NoDma, NoDma, config);
// Send enough bytes to fill the RX FIFOs off all USART versions.
let data = [0xC0, 0xDE, 0x12, 0x23, 0x34];
usart.blocking_write(&data).unwrap();
usart.blocking_flush().unwrap();
// The error should be reported first.
let mut buf = [0; 1];
let err = usart.blocking_read(&mut buf);
assert_eq!(err, Err(Error::Overrun));
// At least the first data byte should still be available on all USART versions.
usart.blocking_read(&mut buf).unwrap();
assert_eq!(buf[0], data[0]);
}
// Test that baudrate divider is calculated correctly.
// Do it by comparing the time it takes to send a known number of bytes.
for baudrate in [