From fae99273c2dc0f4ae4d7032facb7420df289268b Mon Sep 17 00:00:00 2001
From: Filipriec <filippriec@gmail.com>
Date: Tue, 3 Mar 2026 13:14:56 +0100
Subject: [PATCH] 2 sem

---
 2sem_uart_flow_ctrl/src/bin/main.rs | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/2sem_uart_flow_ctrl/src/bin/main.rs b/2sem_uart_flow_ctrl/src/bin/main.rs
index 0257bc8..153dac4 100644
--- a/2sem_uart_flow_ctrl/src/bin/main.rs
+++ b/2sem_uart_flow_ctrl/src/bin/main.rs
@@ -5,8 +5,8 @@
 use defmt::*;
 use core::sync::atomic::{AtomicBool, Ordering};
 use embassy_executor::Spawner;
-use embassy_stm32::usart::{Config, Uart, UartRx, InterruptHandler};
-use embassy_stm32::peripherals::USART1;
+use embassy_stm32::usart::{Config, Uart, UartRx, UartTx, InterruptHandler};
+use embassy_stm32::peripherals::{USART1, USART3};
 use embassy_stm32::bind_interrupts;
 use embassy_time::{Duration, Timer};
 use embassy_sync::channel::Channel;
@@ -16,6 +16,7 @@ use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs {
     USART1 => InterruptHandler<USART1>;
+    USART3 => InterruptHandler<USART3>;
 });
 
 static PIPE: Channel<CriticalSectionRawMutex, u8, 64> = Channel::new();
@@ -29,7 +30,7 @@ async fn main(spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
 
     let config = Config::default();
-    let usart = Uart::new(
+    let dev_usart = Uart::new(
         p.USART1,
         p.PA10,
         p.PA9,
@@ -38,8 +39,19 @@ async fn main(spawner: Spawner) {
         p.GPDMA1_CH1, // RX DMA
         config,
     ).unwrap();
-    let (mut tx, rx) = usart.split();
-    spawner.spawn(rx_task(rx)).unwrap();
+
+    let uart = Uart::new(
+        p.USART3,
+        p.PD9, // RX zo zariadenia
+        p.PD8, // TX do zariadenia
+        Irqs,
+        p.GPDMA1_CH2,
+        p.GPDMA1_CH3,
+        config,
+    ).unwrap();
+    let (mut tx, rx) = uart.split();
+    let (dev_tx, dev_rx) = dev_usart.split();
+    spawner.spawn(rx_task(rx, dev_tx)).unwrap();
     spawner.spawn(toggle_rec_task()).unwrap();
 
     let sender = PIPE.sender();
@@ -74,7 +86,10 @@ async fn main(spawner: Spawner) {
 }
 
 #[embassy_executor::task]
-async fn rx_task(mut rx: UartRx<'static, embassy_stm32::mode::Async>) {
+async fn rx_task(
+    mut rx: UartRx<'static, embassy_stm32::mode::Async>,
+    mut pc_tx: UartTx<'static, embassy_stm32::mode::Async>
+) {
     let mut buf = [0u8; 1];
     loop {
         if rx.read(&mut buf).await.is_ok() {
@@ -89,6 +104,7 @@ async fn rx_task(mut rx: UartRx<'static, embassy_stm32::mode::Async>) {
                 }
                 _ => {}
             }
+            let _ = pc_tx.write(&buf).await;
         }
     }
 }