stm32/test: add C0 hil tests.

tests/stm32/Cargo.toml

@@ -8,6 +8,7 @@ license = "MIT OR Apache-2.0"
 stm32f103c8 = ["embassy-stm32/stm32f103c8"]     # Blue Pill
 stm32f429zi = ["embassy-stm32/stm32f429zi"]     # Nucleo
 stm32g071rb = ["embassy-stm32/stm32g071rb"]     # Nucleo
+stm32c031c6 = ["embassy-stm32/stm32c031c6"]     # Nucleo
 stm32g491re = ["embassy-stm32/stm32g491re"]     # Nucleo
 stm32h755zi = ["embassy-stm32/stm32h755zi-cm7"] # Nucleo
 stm32wb55rg = ["embassy-stm32/stm32wb55rg"]     # Nucleo
@@ -18,7 +19,7 @@ stm32u585ai = ["embassy-stm32/stm32u585ai"]     # IoT board
 embassy-sync = { version = "0.1.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["defmt", "tick-hz-32_768"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "memory-x", "time-driver-tim2"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "memory-x", "time-driver-any"]  }
 
 defmt = "0.3.0"
 defmt-rtt = "0.4"

tests/stm32/build.rs

@@ -9,7 +9,13 @@ fn main() -> Result<(), Box<dyn Error>> {
     println!("cargo:rerun-if-changed=link_ram.x");
 
     println!("cargo:rustc-link-arg-bins=--nmagic");
+
+    // too little RAM to run from RAM.
+    #[cfg(any(feature = "stm32c031c6"))]
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    #[cfg(not(any(feature = "stm32c031c6")))]
     println!("cargo:rustc-link-arg-bins=-Tlink_ram.x");
+
     println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
 
     Ok(())

tests/stm32/src/bin/gpio.rs

@@ -32,6 +32,8 @@ async fn main(_spawner: Spawner) {
     let (mut a, mut b) = (p.PD9, p.PD8);
     #[cfg(feature = "stm32h563zi")]
     let (mut a, mut b) = (p.PB6, p.PB7);
+    #[cfg(feature = "stm32c031c6")]
+    let (mut a, mut b) = (p.PB6, p.PB7);
 
     // Test initial output
     {

tests/stm32/src/bin/spi.rs

@@ -32,6 +32,8 @@ async fn main(_spawner: Spawner) {
     let (spi, sck, mosi, miso) = (p.SPI1, p.PE13, p.PE15, p.PE14);
     #[cfg(feature = "stm32h563zi")]
     let (spi, sck, mosi, miso) = (p.SPI4, p.PE12, p.PE14, p.PE13);
+    #[cfg(feature = "stm32c031c6")]
+    let (spi, sck, mosi, miso) = (p.SPI1, p.PA5, p.PA7, p.PA6);
 
     info!("asdfa;");
     let mut spi = Spi::new(
@@ -49,7 +51,7 @@ async fn main(_spawner: Spawner) {
 
     // 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 = data;
+    let mut buf = [0; 9];
     spi.blocking_transfer(&mut buf, &data).unwrap();
     assert_eq!(buf, data);
 

tests/stm32/src/bin/spi_dma.rs

@@ -31,6 +31,8 @@ async fn main(_spawner: Spawner) {
     let (spi, sck, mosi, miso, tx_dma, rx_dma) = (p.SPI1, p.PE13, p.PE15, p.PE14, p.GPDMA1_CH0, p.GPDMA1_CH1);
     #[cfg(feature = "stm32h563zi")]
     let (spi, sck, mosi, miso, tx_dma, rx_dma) = (p.SPI4, p.PE12, p.PE14, p.PE13, p.GPDMA1_CH0, p.GPDMA1_CH1);
+    #[cfg(feature = "stm32c031c6")]
+    let (spi, sck, mosi, miso, tx_dma, rx_dma) = (p.SPI1, p.PA5, p.PA7, p.PA6, p.DMA1_CH1, p.DMA1_CH2);
 
     let mut spi = Spi::new(
         spi,

tests/stm32/src/bin/usart.rs

@@ -34,6 +34,8 @@ async fn main(_spawner: Spawner) {
     let (tx, rx, usart, irq) = (p.PD8, p.PD9, p.USART3, interrupt::take!(USART3));
     #[cfg(feature = "stm32h563zi")]
     let (tx, rx, usart, irq) = (p.PB6, p.PB7, p.LPUART1, interrupt::take!(LPUART1));
+    #[cfg(feature = "stm32c031c6")]
+    let (tx, rx, usart, irq) = (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1));
 
     let config = Config::default();
     let mut usart = Uart::new(usart, rx, tx, irq, NoDma, NoDma, config);

tests/stm32/src/bin/usart_dma.rs

@@ -71,6 +71,9 @@ async fn main(_spawner: Spawner) {
         p.GPDMA1_CH0,
         p.GPDMA1_CH1,
     );
+    #[cfg(feature = "stm32c031c6")]
+    let (tx, rx, usart, irq, tx_dma, rx_dma) =
+        (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1), p.DMA1_CH1, p.DMA1_CH2);
 
     let config = Config::default();
     let mut usart = Uart::new(usart, rx, tx, irq, tx_dma, rx_dma, config);