2faa2654cb
* GPIO Refactoring * CHANGELOG.md * Addressed review comments * Use `Level` instead of plain bool in public API * Let drivers enable analog functions
65 lines
1.5 KiB
Rust
65 lines
1.5 KiB
Rust
//! SPI loopback test
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//!
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//! Folowing pins are used:
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//! SCLK GPIO0
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//! MISO GPIO2
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//! MOSI GPIO4
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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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//! Connect MISO and MOSI pins to see the outgoing data is read as incoming
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//! data.
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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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clock::ClockControl,
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delay::Delay,
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gpio::{any_pin::AnyPin, Io},
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peripherals::Peripherals,
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prelude::*,
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spi::{master::Spi, SpiMode},
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system::SystemControl,
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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 = Peripherals::take();
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let system = SystemControl::new(peripherals.SYSTEM);
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
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let sclk = io.pins.gpio0;
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let miso = io.pins.gpio2;
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let mosi = io.pins.gpio4;
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let cs = io.pins.gpio5;
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let miso = AnyPin::new(miso);
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let mosi = AnyPin::new(mosi);
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let mut spi = Spi::new(peripherals.SPI2, 100.kHz(), SpiMode::Mode0, &clocks).with_pins(
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Some(sclk),
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Some(mosi),
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Some(miso),
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Some(cs),
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);
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let delay = Delay::new(&clocks);
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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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