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comparison ctrl.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 600a394629e6
comparison
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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 .define TRIGGER_IRQ 0
6
5 .program ctrl 7 .program ctrl
6 .define DAC_TRIGGER_IRQ 0
7 .define CTRL_TRIGGER_IRQ 1
8
9 ; Assert all 0s 8 ; Assert all 0s
10 mov pins, null 9 mov pins, null
11 ; Wait for start trigger and clear IRQ 10 ; Wait for start trigger and clear IRQ
12 wait 1 irq CTRL_TRIGGER_IRQ 11 wait 1 irq TRIGGER_IRQ
13 .wrap_target 12 .wrap_target
14 out pins 8 13 out pins 8 [1]
15 nop 14 nop [1]
16 out pins 8 15 out pins 8 [1]
17 nop 16 nop [1]
18 out pins 8 17 out pins 8 [1]
19 nop 18 nop [1]
20 out pins 8 19 out pins 8 [1]
21 nop 20 nop [1]
22 .wrap 21 .wrap
23 22
24 % c-sdk { 23 % c-sdk {
25 static inline void ctrl_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) { 24 static inline void ctrl_program_init(PIO pio, uint sm, uint offset, uint pin, uint clkdiv) {
26 pio_sm_config c = ctrl_program_get_default_config(offset); 25 pio_sm_config c = ctrl_program_get_default_config(offset);
45 // We only send, so disable the RX FIFO to make the TX FIFO deeper. 44 // We only send, so disable the RX FIFO to make the TX FIFO deeper.
46 sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX); 45 sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
47 46
48 sm_config_set_clkdiv(&c, clkdiv); 47 sm_config_set_clkdiv(&c, clkdiv);
49 48
50 // Load our configuration, and start the program from the beginning 49 // Load our configuration
51 pio_sm_init(pio, sm, offset, &c); 50 pio_sm_init(pio, sm, offset, &c);
52 pio_sm_set_enabled(pio, sm, true);
53 } 51 }
54 %} 52 %}