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Improve the SPIv2 DMA example to verify it actually works.

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This commit is contained in:
Bob McWhirter 2021-07-21 10:52:26 -04:00
parent 0d2051243e
commit bee7f60f08
1 changed files with 23 additions and 10 deletions
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23
examples/stm32l4/src/bin/spi_dma.rs
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@ -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(),
);
let mut cs = Output::new(p.PE0, Level::High, Speed::VeryHigh);
loop {
// 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);
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;