Introduce SPI3 instead of SPI1 for test and examples

Author: Sh3Rm4n

examples/spi.rs

@@ -20,7 +20,7 @@ fn main() -> ! {
 
     let mut flash = dp.FLASH.constrain();
     let mut rcc = dp.RCC.constrain();
-    let mut gpioa = dp.GPIOA.split(&mut rcc.ahb);
+    let mut gpioc = dp.GPIOC.split(&mut rcc.ahb);
 
     let clocks = rcc
         .cfgr
@@ -30,28 +30,28 @@ fn main() -> ! {
         .freeze(&mut flash.acr);
 
     // Configure pins for SPI
-    let sck = gpioa
-        .pa5
-        .into_af5_push_pull(&mut gpioa.moder, &mut gpioa.otyper, &mut gpioa.afrl);
-    let miso = gpioa
-        .pa6
-        .into_af5_push_pull(&mut gpioa.moder, &mut gpioa.otyper, &mut gpioa.afrl);
-    let mosi = gpioa
-        .pa7
-        .into_af5_push_pull(&mut gpioa.moder, &mut gpioa.otyper, &mut gpioa.afrl);
+    let sck = gpioc
+        .pc10
+        .into_af6_push_pull(&mut gpioc.moder, &mut gpioc.otyper, &mut gpioc.afrh);
+    let miso = gpioc
+        .pc11
+        .into_af6_push_pull(&mut gpioc.moder, &mut gpioc.otyper, &mut gpioc.afrh);
+    let mosi = gpioc
+        .pc12
+        .into_af6_push_pull(&mut gpioc.moder, &mut gpioc.otyper, &mut gpioc.afrh);
 
     let spi_mode = Mode {
         polarity: Polarity::IdleLow,
         phase: Phase::CaptureOnFirstTransition,
     };
 
     let mut spi = Spi::new(
-        dp.SPI1,
+        dp.SPI3,
         (sck, miso, mosi),
         spi_mode,
         3_000_000.Hz(),
         clocks,
-        &mut rcc.apb2,
+        &mut rcc.apb1,
     );
 
     // Create an `u8` array, which can be transfered via SPI.

testsuite/src/lib.rs

@@ -45,6 +45,11 @@ pub struct CrossSerialPair1<T1, T2>(pub PA2<T1>, pub PB11<T2>);
 /// This is used for UART, where UART3(TX) is connected to UART2(RX)
 pub struct CrossSerialPair2<T1, T2>(pub PB10<T1>, pub PA3<T2>);
 
+/// Pin Pair directly connected to each other.
+///
+/// This is used for SPI, where SPI3(TX) is connected to SPI3(RX)
+pub struct SpiPair<T>(pub PC10<T>, pub PC11<T>, pub PC12<T>);
+
 #[export_name = "main"]
 unsafe extern "C" fn __dummy_entry() -> ! {
     defmt_test::export::exit()