stm32/tests: add DMA SPI

tests/stm32/src/bin/spi_dma.rs

@@ -0,0 +1,51 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use defmt::assert_eq;
+use embassy::executor::Spawner;
+use embassy_stm32::spi::{self, Spi};
+use embassy_stm32::time::Hertz;
+use embassy_stm32::Peripherals;
+use embassy_traits::spi::FullDuplex;
+use example_common::*;
+
+#[embassy::main(config = "config()")]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    #[cfg(feature = "stm32f429zi")]
+    let (sck, mosi, miso, tx_dma, rx_dma) = (p.PA5, p.PA7, p.PA6, p.DMA2_CH3, p.DMA2_CH2);
+    #[cfg(feature = "stm32h755zi")]
+    let (sck, mosi, miso, tx_dma, rx_dma) = (p.PA5, p.PB5, p.PA6, p.DMA1_CH0, p.DMA1_CH1);
+    #[cfg(feature = "stm32g491re")]
+    let (sck, mosi, miso, tx_dma, rx_dma) = (p.PA5, p.PA7, p.PA6, p.DMA1_CH0, p.DMA1_CH1);
+    #[cfg(feature = "stm32g071rb")]
+    let (sck, mosi, miso, tx_dma, rx_dma) = (p.PA5, p.PA7, p.PA6, p.DMA1_CH0, p.DMA1_CH1);
+    #[cfg(feature = "stm32wb55rg")]
+    let (sck, mosi, miso, tx_dma, rx_dma) = (p.PA5, p.PA7, p.PA6, p.DMA1_CH0, p.DMA1_CH1);
+
+    let mut spi = Spi::new(
+        p.SPI1,
+        sck,  // Arduino D13
+        mosi, // Arduino D11
+        miso, // Arduino D12
+        tx_dma,
+        rx_dma,
+        Hertz(1_000_000),
+        spi::Config::default(),
+    );
+
+    let data: [u8; 9] = [0x00, 0xFF, 0xAA, 0x55, 0xC0, 0xFF, 0xEE, 0xC0, 0xDE];
+
+    // Arduino pins D11 and D12 (MOSI-MISO) are connected together with a 1K resistor.
+    // so we should get the data we sent back.
+    let mut buf = [0; 9];
+    spi.read_write(&mut buf, &data).await.unwrap();
+    assert_eq!(buf, data);
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}