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comparison trigger.pio @ 12:283955273884

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Add trigger PIO file
author Daniel O'Connor <darius@dons.net.au>
date Mon, 24 Feb 2025 17:27:20 +1030
parents
children c7845db23ab2
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11:e9d12b36cfcc 12:283955273884
1 ;
2 ; Copyright (c) 2025 Daniel O'Connor
3 ;
4
5 .program trigger
6 .define TRIGGER_IRQ 0
7
8 .wrap_target
9 ; Wait for trigger to be low
10 wait 0 pin 0
11 ; Wait for rising edge
12 wait 1 pin 0
13 ; Signal other state machine
14 irq nowait TRIGGER_IRQ
15 .wrap
16
17 % c-sdk {
18 static inline void trigger_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) {
19 pio_sm_config c = trigger_program_get_default_config(offset);
20
21 // Configure SM input pin mapping to point to trigger pin
22 sm_config_set_in_pins(&c, pin);
23 // Set to input
24 pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, false);
25 // Connect this GPIO to this PIO block
26 pio_gpio_init(pio, pin);
27
28 sm_config_set_clkdiv(&c, clkdiv);
29
30 // Load our configuration, and start the program from the beginning
31 pio_sm_init(pio, sm, offset, &c);
32 pio_sm_set_enabled(pio, sm, true);
33 }
34 %}