Merge #1042

1042: embassy-nrf: Add SPIS module r=Dirbaio a=kalkyl

Verified to be working on nrf9160

Co-authored-by: Henrik Alsér <henrik.alser@me.com>
Co-authored-by: Henrik Alsér <henrik.alser@ucsmindbite.se>
Co-authored-by: kalkyl <henrik.alser@me.com>

examples/nrf/src/bin/spis.rs

@@ -0,0 +1,27 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nrf::interrupt;
+use embassy_nrf::spis::{Config, Spis};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Running!");
+
+    let irq = interrupt::take!(SPIM2_SPIS2_SPI2);
+    let mut spis = Spis::new(p.SPI2, irq, p.P0_31, p.P0_29, p.P0_28, p.P0_30, Config::default());
+
+    loop {
+        let mut rx_buf = [0_u8; 64];
+        let tx_buf = [1_u8, 2, 3, 4, 5, 6, 7, 8];
+        if let Ok((n_rx, n_tx)) = spis.transfer(&mut rx_buf, &tx_buf).await {
+            info!("RX: {:?}", rx_buf[..n_rx]);
+            info!("TX: {:?}", tx_buf[..n_tx]);
+        }
+    }
+}