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comparison trigger.pio @ 27:e1d8fe3e418a

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Run PIOs at 1x with delays and sync. Can now use a single trigger to set both DAC & ctrl. DAC [still] jitters against the ctrl though..
author Daniel O'Connor <darius@dons.net.au>
date Wed, 26 Feb 2025 11:03:59 +1030
parents 6070d2e66b4c
children
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equal deleted inserted replaced
26:336f06fa6e47 27:e1d8fe3e418a
1 ; 1 ;
2 ; Copyright (c) 2025 Daniel O'Connor 2 ; Copyright (c) 2025 Daniel O'Connor
3 ; 3 ;
4 4
5 .program trigger 5 .program trigger
6 .define DAC_TRIGGER_IRQ 0 6 .define TRIGGER_IRQ 0
7 .define CTRL_TRIGGER_IRQ 1
8 ; Use 1 side set pin for debugging 7 ; Use 1 side set pin for debugging
9 .side_set 1 8 .side_set 1
10 9
11 .wrap_target 10 .wrap_target
12 ; Wait for trigger to be low 11 ; Wait for trigger to be low
13 wait 0 pin 0 side 0 12 wait 0 pin 0 side 0
14 ; Wait for rising edge 13 ; Wait for rising edge
15 wait 1 pin 0 side 0 14 wait 1 pin 0 side 0
16 ; Signal DAC SM (which will trigger the control one) 15 ; Signal DAC & ctrl SMs
17 irq nowait DAC_TRIGGER_IRQ side 1 16 irq nowait TRIGGER_IRQ side 1
18 .wrap 17 .wrap
19 18
20 % c-sdk { 19 % c-sdk {
21 static inline void trigger_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) { 20 static inline void trigger_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) {
22 pio_sm_config c = trigger_program_get_default_config(offset); 21 pio_sm_config c = trigger_program_get_default_config(offset);
35 // Connect this GPIO to this PIO block 34 // Connect this GPIO to this PIO block
36 pio_gpio_init(pio, pin + 1); 35 pio_gpio_init(pio, pin + 1);
37 36
38 sm_config_set_clkdiv(&c, clkdiv); 37 sm_config_set_clkdiv(&c, clkdiv);
39 38
40 // Load our configuration, and start the program from the beginning 39 // Load our configuration
41 pio_sm_init(pio, sm, offset, &c); 40 pio_sm_init(pio, sm, offset, &c);
42 pio_sm_set_enabled(pio, sm, true);
43 } 41 }
44 %} 42 %}