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working only at 600 baud, we are reading data of the pin in the interrupt

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Priec
2025-11-19 14:41:39 +01:00
parent 28d041873c
commit 89ee552da3
2 changed files with 37 additions and 6 deletions
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39
semestralka_1d_rx_bez_dma/src/bin/main.rs
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@@ -29,12 +29,15 @@ use dma_gpio::hw_uart_internal::driver::uart_task as uart_task_internal;
use dma_gpio::config::{PIPE_INT_TX, PIPE_INT_RX}; use dma_gpio::config::{PIPE_INT_TX, PIPE_INT_RX};
use embassy_time::{Duration, Timer}; use embassy_time::{Duration, Timer};
use embassy_stm32::pac; use embassy_stm32::pac;
use embassy_stm32::interrupt;
use {defmt_rtt as _, panic_probe as _}; use {defmt_rtt as _, panic_probe as _};
use cortex_m::interrupt::Mutex; use cortex_m::interrupt::Mutex;
use core::cell::RefCell; use core::cell::RefCell;
use embassy_sync::channel::Channel;
static RX_PIN_GLOBAL: Mutex<RefCell<Option<&'static Input<'static>>>> = Mutex::new(RefCell::new(None)); static RX_PIN_GLOBAL: Mutex<RefCell<Option<&'static Input<'static>>>> = Mutex::new(RefCell::new(None));
static PD6_BITS: Channel<CriticalSectionRawMutex, u8, 512> = Channel::new();
bind_interrupts!(struct Irqs { bind_interrupts!(struct Irqs {
USART1 => BufferedInterruptHandler<peripherals::USART1>; USART1 => BufferedInterruptHandler<peripherals::USART1>;
@@ -113,18 +116,46 @@ async fn main(spawner: Spawner) {
init_tim6_for_uart(p.TIM6, BAUD, TX_OVERSAMPLE); init_tim6_for_uart(p.TIM6, BAUD, TX_OVERSAMPLE);
init_tim7_for_uart(p.TIM7, BAUD, RX_OVERSAMPLE); init_tim7_for_uart(p.TIM7, BAUD, RX_OVERSAMPLE);
unsafe { cortex_m::peripheral::NVIC::unmask(pac::Interrupt::TIM7); }
info!("TIM7 Interrupt enabled");
dump_tim6_regs(); dump_tim6_regs();
// EDN OF SOFTWARE UART // EDN OF SOFTWARE UART
unsafe { cortex_m::peripheral::NVIC::unmask(pac::Interrupt::TIM7); }
loop { loop {
if let Ok(bit) = PD6_BITS.try_receive() {
// only called when ISR pushed something
info!("c");
}
yield_now().await; yield_now().await;
} }
} }
#[interrupt]
fn TIM7() {
let tim = unsafe { pac::TIM7 };
// acknowledge update
if tim.sr().read().uif() {
tim.sr().modify(|w| w.set_uif(false));
// quick PD6 read
let bit = cortex_m::interrupt::free(|cs| {
RX_PIN_GLOBAL
.borrow(cs)
.borrow()
.as_ref()
.map(|pin| pin.is_high())
.unwrap_or(false)
});
// track state change; push if different
static mut LAST: bool = false;
if bit != unsafe { LAST } {
unsafe { LAST = bit; }
let _ = PD6_BITS.try_send(bit as u8);
}
}
}
#[embassy_executor::task] #[embassy_executor::task]
pub async fn bridge_usart1_rx_to_usart2_tx( pub async fn bridge_usart1_rx_to_usart2_tx(
usart1_rx: &'static Pipe<CriticalSectionRawMutex, 1024>, usart1_rx: &'static Pipe<CriticalSectionRawMutex, 1024>,

4
semestralka_1d_rx_bez_dma/src/config.rs
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@@ -3,13 +3,13 @@ use crate::software_uart::uart_emulation::{Parity, StopBits, UartConfig};
use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex; use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
use embassy_sync::pipe::Pipe; use embassy_sync::pipe::Pipe;
pub const BAUD: u32 = 9_600; pub const BAUD: u32 = 600;
// pub const TX_PIN_BIT: u8 = 2; // PA2 // pub const TX_PIN_BIT: u8 = 2; // PA2
// pub const RX_PIN_BIT: u8 = 3; // PA3 // pub const RX_PIN_BIT: u8 = 3; // PA3
pub const TX_PIN_BIT: u8 = 0; // PB2 pub const TX_PIN_BIT: u8 = 0; // PB2
pub const RX_PIN_BIT: u8 = 3; // PC3 pub const RX_PIN_BIT: u8 = 3; // PC3
pub const TX_OVERSAMPLE: u16 = 1; pub const TX_OVERSAMPLE: u16 = 1;
pub const RX_OVERSAMPLE: u16 = 16; pub const RX_OVERSAMPLE: u16 = 1;
pub const RX_RING_BYTES: usize = 4096; pub const RX_RING_BYTES: usize = 4096;
pub const TX_RING_BYTES: usize = 4096; pub const TX_RING_BYTES: usize = 4096;