113 lines
3.3 KiB
Rust
113 lines
3.3 KiB
Rust
#![no_std]
|
|
#![no_main]
|
|
#![feature(type_alias_impl_trait)]
|
|
use defmt::info;
|
|
use embassy_executor::Spawner;
|
|
use embassy_rp::gpio::{AnyPin, Pin};
|
|
use embassy_rp::pio::{Pio0, PioPeripherial, PioStateMachine, PioStateMachineInstance, ShiftDirection, Sm0, Sm1, Sm2};
|
|
use embassy_rp::pio_instr_util;
|
|
use embassy_rp::relocate::RelocatedProgram;
|
|
use {defmt_rtt as _, panic_probe as _};
|
|
|
|
#[embassy_executor::task]
|
|
async fn pio_task_sm0(mut sm: PioStateMachineInstance<Pio0, Sm0>, pin: AnyPin) {
|
|
// Setup sm0
|
|
|
|
// Send data serially to pin
|
|
let prg = pio_proc::pio_asm!(
|
|
".origin 16",
|
|
"set pindirs, 1",
|
|
".wrap_target",
|
|
"out pins,1 [19]",
|
|
".wrap",
|
|
);
|
|
|
|
let relocated = RelocatedProgram::new(&prg.program);
|
|
let out_pin = sm.make_pio_pin(pin);
|
|
let pio_pins = [&out_pin];
|
|
sm.set_out_pins(&pio_pins);
|
|
sm.write_instr(relocated.origin() as usize, relocated.code());
|
|
pio_instr_util::exec_jmp(&mut sm, relocated.origin());
|
|
sm.set_clkdiv((125e6 / 20.0 / 2e2 * 256.0) as u32);
|
|
sm.set_set_range(0, 1);
|
|
let pio::Wrap { source, target } = relocated.wrap();
|
|
sm.set_wrap(source, target);
|
|
|
|
sm.set_autopull(true);
|
|
sm.set_out_shift_dir(ShiftDirection::Left);
|
|
|
|
sm.set_enable(true);
|
|
|
|
let mut v = 0x0f0caffa;
|
|
loop {
|
|
sm.wait_push(v).await;
|
|
v ^= 0xffff;
|
|
info!("Pushed {:032b} to FIFO", v);
|
|
}
|
|
}
|
|
|
|
#[embassy_executor::task]
|
|
async fn pio_task_sm1(mut sm: PioStateMachineInstance<Pio0, Sm1>) {
|
|
// Setupm sm1
|
|
|
|
// Read 0b10101 repeatedly until ISR is full
|
|
let prg = pio_proc::pio_asm!(".origin 8", "set x, 0x15", ".wrap_target", "in x, 5 [31]", ".wrap",);
|
|
|
|
let relocated = RelocatedProgram::new(&prg.program);
|
|
sm.write_instr(relocated.origin() as usize, relocated.code());
|
|
pio_instr_util::exec_jmp(&mut sm, relocated.origin());
|
|
sm.set_clkdiv((125e6 / 2e3 * 256.0) as u32);
|
|
sm.set_set_range(0, 0);
|
|
let pio::Wrap { source, target } = relocated.wrap();
|
|
sm.set_wrap(source, target);
|
|
|
|
sm.set_autopush(true);
|
|
sm.set_in_shift_dir(ShiftDirection::Right);
|
|
sm.set_enable(true);
|
|
loop {
|
|
let rx = sm.wait_pull().await;
|
|
info!("Pulled {:032b} from FIFO", rx);
|
|
}
|
|
}
|
|
|
|
#[embassy_executor::task]
|
|
async fn pio_task_sm2(mut sm: PioStateMachineInstance<Pio0, Sm2>) {
|
|
// Setup sm2
|
|
|
|
// Repeatedly trigger IRQ 3
|
|
let prg = pio_proc::pio_asm!(
|
|
".origin 0",
|
|
".wrap_target",
|
|
"set x,10",
|
|
"delay:",
|
|
"jmp x-- delay [15]",
|
|
"irq 3 [15]",
|
|
".wrap",
|
|
);
|
|
let relocated = RelocatedProgram::new(&prg.program);
|
|
sm.write_instr(relocated.origin() as usize, relocated.code());
|
|
|
|
let pio::Wrap { source, target } = relocated.wrap();
|
|
sm.set_wrap(source, target);
|
|
|
|
pio_instr_util::exec_jmp(&mut sm, relocated.origin());
|
|
sm.set_clkdiv((125e6 / 2e3 * 256.0) as u32);
|
|
sm.set_enable(true);
|
|
loop {
|
|
sm.wait_irq(3).await;
|
|
info!("IRQ trigged");
|
|
}
|
|
}
|
|
|
|
#[embassy_executor::main]
|
|
async fn main(spawner: Spawner) {
|
|
let p = embassy_rp::init(Default::default());
|
|
let pio = p.PIO0;
|
|
|
|
let (_, sm0, sm1, sm2, ..) = pio.split();
|
|
|
|
spawner.spawn(pio_task_sm0(sm0, p.PIN_0.degrade())).unwrap();
|
|
spawner.spawn(pio_task_sm1(sm1)).unwrap();
|
|
spawner.spawn(pio_task_sm2(sm2)).unwrap();
|
|
}
|