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annotate trigger.pio @ 24:c7845db23ab2

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Add sideset for trigger output. Trigger both SMs
author Daniel O'Connor <darius@dons.net.au>
date Tue, 25 Feb 2025 16:47:00 +1030
parents 283955273884
children 6070d2e66b4c
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1 ;
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2 ; Copyright (c) 2025 Daniel O'Connor
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3 ;
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5 .program trigger
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6 .define DAC_TRIGGER_IRQ 0
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7 .define CTRL_TRIGGER_IRQ 1
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8 ; Use 1 side set pin for debugging
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9 .side_set 1
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11 .wrap_target
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12 ; Wait for trigger to be low
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13 wait 0 pin 0 side 0
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14 ; Wait for rising edge
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15 wait 1 pin 0 side 0
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16 ; Signal other state machines
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17 irq nowait DAC_TRIGGER_IRQ side 1
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18 irq nowait CTRL_TRIGGER_IRQ side 1
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19 .wrap
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21 % c-sdk {
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22 static inline void trigger_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) {
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23 pio_sm_config c = trigger_program_get_default_config(offset);
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25 // Configure SM input pin mapping to point to trigger pin
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26 sm_config_set_in_pins(&c, pin);
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27 // Set to input
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28 pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, false);
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29 // Connect this GPIO to this PIO block
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30 pio_gpio_init(pio, pin);
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32 // Configure side pin mapping to point to debug pin
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33 sm_config_set_sideset_pins(&c, pin + 1);
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34 // Set to output
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35 pio_sm_set_consecutive_pindirs(pio, sm, pin + 1, 1, true);
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36 // Connect this GPIO to this PIO block
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37 pio_gpio_init(pio, pin + 1);
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39 sm_config_set_clkdiv(&c, clkdiv);
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41 // Load our configuration, and start the program from the beginning
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42 pio_sm_init(pio, sm, offset, &c);
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43 pio_sm_set_enabled(pio, sm, true);
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44 }
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45 %}