mirror of
https://github.com/esp-rs/esp-hal.git
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0064766ef2
* No longer publicly expose the `PeripheralClockControl` struct * Update examples as needed to get things building again * Update CHANGELOG.md * Address review feedback, fix a warning * Use a critical section for all devices other than the ESP32-C6/H2, as they modify multiple registers * Rebase and update `etm` driver to fix build errors
63 lines
1.3 KiB
Rust
63 lines
1.3 KiB
Rust
//! SPI loopback test
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//!
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//! Folowing pins are used:
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//! SCLK GPIO19
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//! MISO GPIO25
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//! MOSI GPIO23
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//! CS GPIO22
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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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#![no_std]
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#![no_main]
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use esp32_hal::{
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clock::ClockControl,
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gpio::IO,
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peripherals::Peripherals,
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prelude::*,
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spi::{Spi, SpiMode},
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Delay,
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};
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use esp_backtrace as _;
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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 = peripherals.DPORT.split();
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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.gpio19;
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let miso = io.pins.gpio25;
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let mosi = io.pins.gpio23;
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let cs = io.pins.gpio22;
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let mut spi = Spi::new(
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peripherals.SPI2,
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sclk,
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mosi,
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miso,
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cs,
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100u32.kHz(),
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SpiMode::Mode0,
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&clocks,
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);
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let mut 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_ms(250u32);
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}
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}
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