63 lines
1.3 KiB
Rust
63 lines
1.3 KiB
Rust
//! SPI loopback test
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//!
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//! The following wiring is assumed:
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//! - SCLK => GPIO0
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//! - MISO/MOSI => GPIO2
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//! - CS => GPIO5
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//!
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//! Depending on your target and the board you are using you have to change the
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//! pins.
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//!
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//! This example transfers data via SPI.
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//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
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#![no_std]
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#![no_main]
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use esp_backtrace as _;
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use esp_hal::{
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delay::Delay,
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peripheral::Peripheral,
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prelude::*,
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spi::{
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master::{Config, Spi},
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SpiMode,
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},
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};
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use esp_println::println;
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#[entry]
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fn main() -> ! {
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let peripherals = esp_hal::init(esp_hal::Config::default());
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let sclk = peripherals.GPIO0;
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let miso_mosi = peripherals.GPIO2;
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let cs = peripherals.GPIO5;
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let miso = unsafe { miso_mosi.clone_unchecked() };
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let mut spi = Spi::new_with_config(
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peripherals.SPI2,
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Config {
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frequency: 100.kHz(),
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mode: SpiMode::Mode0,
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..Config::default()
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},
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)
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.with_sck(sclk)
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.with_mosi(miso_mosi)
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.with_miso(miso)
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.with_cs(cs);
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let delay = Delay::new();
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loop {
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let mut data = [0xde, 0xca, 0xfb, 0xad];
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spi.transfer(&mut data).unwrap();
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println!("{:x?}", data);
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delay.delay_millis(250);
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}
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}
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