db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
116 lines
2.9 KiB
Rust
116 lines
2.9 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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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use embassy_executor::Executor;
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use embassy_time::{Duration, Timer};
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use esp32c6_hal::{
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clock::ClockControl,
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dma::DmaPriority,
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embassy,
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gdma::{self, Gdma},
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gpio::{GpioPin, Unknown, IO},
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interrupt,
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parl_io::{BitPackOrder, NoClkPin, ParlIoRx, ParlIoRxOnly, RxFourBits},
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peripherals,
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peripherals::Peripherals,
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prelude::*,
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};
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use esp_backtrace as _;
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use esp_println::println;
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use static_cell::make_static;
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#[embassy_executor::task]
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async fn parl_io_task(
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mut parl_io_rx: ParlIoRx<
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'static,
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gdma::Channel0,
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RxFourBits<
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'static,
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GpioPin<Unknown, 1>,
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GpioPin<Unknown, 2>,
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GpioPin<Unknown, 3>,
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GpioPin<Unknown, 4>,
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>,
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NoClkPin,
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>,
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) {
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let buffer = dma_buffer();
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loop {
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parl_io_rx.read_dma_async(buffer).await.unwrap();
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println!("Received: {:02x?} ...", &buffer[..30]);
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Timer::after(Duration::from_millis(500)).await;
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}
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}
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#[entry]
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fn main() -> ! {
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esp_println::println!("Init!");
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let peripherals = Peripherals::take();
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let mut system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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#[cfg(feature = "embassy-time-systick")]
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embassy::init(
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&clocks,
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esp32c6_hal::systimer::SystemTimer::new(peripherals.SYSTIMER),
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);
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#[cfg(feature = "embassy-time-timg0")]
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{
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let timer_group0 = esp32c6_hal::timer::TimerGroup::new(peripherals.TIMG0, &clocks);
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embassy::init(&clocks, timer_group0.timer0);
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}
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let tx_descriptors = make_static!([0u32; 8 * 3]);
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let rx_descriptors = make_static!([0u32; 8 * 3]);
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let dma = Gdma::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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tx_descriptors,
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rx_descriptors,
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DmaPriority::Priority0,
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),
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1u32.MHz(),
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&clocks,
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)
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.unwrap();
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let 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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// you need to manually enable the DMA channel's interrupt!
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interrupt::enable(
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peripherals::Interrupt::DMA_IN_CH0,
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interrupt::Priority::Priority1,
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)
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.unwrap();
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let executor = make_static!(Executor::new());
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executor.run(|spawner| {
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spawner.spawn(parl_io_task(parl_io_rx)).ok();
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});
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}
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fn dma_buffer() -> &'static mut [u8; 4092 * 4] {
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static mut BUFFER: [u8; 4092 * 4] = [0u8; 4092 * 4];
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unsafe { &mut BUFFER }
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}
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