Improve the SPIv2 DMA example to verify it actually works.

1 files changed, 22 insertions, 9 deletions

diff --git a/examples/stm32l4/src/bin/spi_dma.rs b/examples/stm32l4/src/bin/spi_dma.rs
index ca77c2f9b..2d176a3d2 100644
--- a/examples/stm32l4/src/bin/spi_dma.rs
+++ b/examples/stm32l4/src/bin/spi_dma.rs
@@ -18,8 +18,8 @@ use example_common::*;
 use embassy_stm32::spi::{Spi, Config};
 use embassy_traits::spi::FullDuplex;
 use embassy_stm32::time::Hertz;
-use embassy_stm32::gpio::{Output, Level, Speed};
-use embedded_hal::digital::v2::OutputPin;
+use embassy_stm32::gpio::{Output, Level, Speed, Input, Pull};
+use embedded_hal::digital::v2::{OutputPin, InputPin};
 
 #[embassy::task]
 async fn main_task() {
@@ -36,16 +36,29 @@ async fn main_task() {
         Config::default(),
     );
 
+
+    // These are the pins for the Inventek eS-Wifi SPI Wifi Adapter.
+
+    let mut boot = Output::new(p.PB12, Level::Low, Speed::VeryHigh);
+    let mut wake = Output::new(p.PB13, Level::Low, Speed::VeryHigh);
+    let mut reset = Output::new(p.PE8, Level::Low, Speed::VeryHigh);
     let mut cs = Output::new(p.PE0, Level::High, Speed::VeryHigh);
+    let mut ready = Input::new(p.PE1, Pull::Up);
 
-    loop {
-        let write = [0x0A; 10];
-        let mut read = [0; 10];
-        unwrap!(cs.set_low());
-        spi.read_write(&mut read, &write).await.ok();
-        unwrap!(cs.set_high());
-        info!("xfer {=[u8]:x}", read);
+    cortex_m::asm::delay(100_000);
+    reset.set_high();
+    cortex_m::asm::delay(100_000);
+
+    while ready.is_low().unwrap() {
+        info!("waiting for ready");
     }
+
+    let write = [0x0A; 10];
+    let mut read = [0; 10];
+    unwrap!(cs.set_low());
+    spi.read_write(&mut read, &write).await.ok();
+    unwrap!(cs.set_high());
+    info!("xfer {=[u8]:x}", read);
 }
 
 struct ZeroClock;