56a7553b2d
* Remove uneeded usb generics * Ensure all structs are consistently CamelCased * changelog
70 lines
1.7 KiB
Rust
70 lines
1.7 KiB
Rust
//! This shows using Parallel IO to input 4 bit parallel data at 1MHz clock
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//! rate.
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//!
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//! Uses GPIO 1, 2, 3 and 4 as the data pins.
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//% CHIPS: esp32c6 esp32h2
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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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dma::{Dma, DmaPriority},
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dma_buffers,
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gpio::Io,
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parl_io::{BitPackOrder, NoClkPin, ParlIoRxOnly, RxFourBits},
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peripherals::Peripherals,
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prelude::*,
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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 = peripherals.SYSTEM.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 (_, mut tx_descriptors, rx_buffer, mut rx_descriptors) = dma_buffers!(0, 32000);
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let dma = Dma::new(peripherals.DMA);
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let dma_channel = dma.channel0;
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let rx_pins = RxFourBits::new(io.pins.gpio1, io.pins.gpio2, io.pins.gpio3, io.pins.gpio4);
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let parl_io = ParlIoRxOnly::new(
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peripherals.PARL_IO,
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dma_channel.configure(
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false,
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&mut tx_descriptors,
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&mut rx_descriptors,
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DmaPriority::Priority0,
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),
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1.MHz(),
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&clocks,
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)
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.unwrap();
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let mut parl_io_rx = parl_io
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.rx
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.with_config(rx_pins, NoClkPin, BitPackOrder::Msb, Some(0xfff))
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.unwrap();
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let mut buffer = rx_buffer;
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buffer.fill(0u8);
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let delay = Delay::new(&clocks);
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loop {
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let transfer = parl_io_rx.read_dma(&mut buffer).unwrap();
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transfer.wait().unwrap();
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println!("Received: {:02x?} ...", &buffer[..30]);
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delay.delay_millis(500);
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}
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}
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