Rx is not using dma now

dma_gpio/src/bin/main.rs

@@ -8,6 +8,9 @@ use embassy_executor::Spawner;
 use embassy_sync::{blocking_mutex::raw::CriticalSectionRawMutex, pipe::Pipe};
 use embassy_time::{Duration, Timer};
 use dma_gpio::dma_timer::init_tim6_for_uart;
+use embassy_stm32::gpio::Input;
+use embassy_stm32::gpio::Pull;
+use dma_gpio::gpio_uart_rx::GpioUartRx;
 use {defmt_rtt as _, panic_probe as _};
 
 use embassy_stm32::{
@@ -20,7 +23,8 @@ use dma_gpio::gpio_dma_uart::{
     write_uart_frames_to_pipe, GpioDmaBsrrTx, Parity, StopBits, UartConfig,
 };
 
-static PIPE: Pipe<CriticalSectionRawMutex, 256> = Pipe::new();
+static PIPE_TX: Pipe<CriticalSectionRawMutex, 256> = Pipe::new();
+static PIPE_RX: Pipe<CriticalSectionRawMutex, 256> = Pipe::new();
 
 // Baud rate: one TIM6 update equals one UART bit-time
 const BAUD: u32 = 115_200;
@@ -76,11 +80,20 @@ fn dump_dma_ch0_regs() {
     );
 }
 
+#[embassy_executor::task]
+async fn rx_task(pin: Input<'static>) {
+    let mut rx = GpioUartRx::new(pin, BAUD, UART_CFG, &PIPE_RX);
+    rx.run().await;
+}
+
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
     info!("DMA Pipe -> GPIO UART-like TX");
 
+    let pa3_rx = Input::new(p.PA3, Pull::Up);
+    spawner.spawn(rx_task(pa3_rx)).unwrap();
+
     // PA2 is the TX "wire"
     let _pa2 = Output::new(p.PA2, Level::High, Speed::VeryHigh);
     // drop(_pa2);
@@ -93,7 +106,7 @@ async fn main(spawner: Spawner) {
     // Example: transmit a string as UART frames via the Pipe
     loop {
         write_uart_frames_to_pipe(
-            &PIPE,
+            &PIPE_TX,
             TX_PIN_BIT,
             b"Hello, DMA UART (configurable)!\r\n",
             &UART_CFG,
@@ -110,7 +123,7 @@ async fn dma_tx_task(ch: Peri<'static, GPDMA1_CH0>) {
     loop {
         // Read one 32-bit BSRR word (4 bytes) from the Pipe
         let mut b = [0u8; 4];
-        let n = PIPE.read(&mut b).await;
+        let n = PIPE_TX.read(&mut b).await;
         if n != 4 {
             continue;
         }