main.rs

    // Initialize and start PIO
    let (mut pio, sm0, sm1, _, _) = pac.PIO0.split(&mut pac.RESETS);

    let program_sm0 = pio_proc::pio_file!("src/pio0.pio", select_program("morse"));
    let installed_sm0 = pio.install(&program_sm0.program).unwrap();
    info!("sm0 offset: {}", installed_sm0.offset());
    let (mut sm_0, _, _) = pio::PIOBuilder::from_program(installed_sm0)
        .set_pins(led_pin_id, 1)
        .clock_divisor(50000.0)
        .build(sm0);

    let program_sm1 = pio_proc::pio_file!("src/pio0.pio", select_program("delay"));
    let installed_sm1 = pio.install(&program_sm1.program).unwrap();
    info!("sm1 offset: {}", installed_sm1.offset());
    let (mut sm_1, _, _) = pio::PIOBuilder::from_program(installed_sm1)
        .clock_divisor(50000.0)
        .build(sm1);

    // The GPIO pin needs to be configured as an output.
    sm_0.set_pindirs([(led_pin_id, pio::PinDir::Output)]);

    //    let sm = sm_0.with(sm_1);
    //    sm.sync().start();

    sm_0.start();

pio0.pio

.program morse
.wrap_target
get_data:
;pull
on_state:
; 3 clock cycles
set x 1
set pins 1
; Tunable parameter for timing
nop [0]
;jmp delay
off_state:
; 3 clock cycles
set x 0
set pins 0
; Tunable parameter for timing
nop [0]
;jmp delay
delay:
;irq wait 4
;jmp x-- off_state
.wrap


.program delay
.wrap_target
wait 1 irq 4
set y 17
delay1:
nop [31]
nop [31]
jmp y-- delay1
irq clear 4
.wrap