Gee
2196633ed5
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First commit of the repo. Contents beyond the v0.1 simulator and layout: - Full Pico 2 W firmware (firmware/app, drivers, engine port, host test). - BANK page and 404 mode A/B removed; learned pads play exactly what was learned. - 404/MiniFreak renamed to KIT/SYNTH throughout (jacks, code, sim, docs, layout labels; wiring rebuilt). - ROLL returns to page select after a re-roll; a freshly learned track turns on. - LCD contrast 66. - ROOT and SCALE pages: 21 scales, AUTO = the seed picks; global and sticky. Intended music change: the scale table grew from 8 to 21 and AUTO picks from all of them, so every seed's scale changed. Vectors regenerated with npm run vectors, plus new key-override cases. Flash record is now version 2. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
#include "encoder.h"
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#include "hardware/gpio.h"
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#define PIN_A 10
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#define PIN_B 11
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#define REST 3 /* A = B = 1: both contacts open at a detent */
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#define DIR -1 /* as wired on the bench, the raw count runs down clockwise */
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static volatile int32_t steps, clicks;
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static volatile int8_t acc; /* edges since the last rest */
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static volatile uint8_t prev;
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/* index = previous AB << 2 | current AB; invalid (bounce) transitions count 0 */
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static const int8_t TABLE[16] = { 0,-1, 1, 0, 1, 0, 0,-1, -1, 0, 0, 1, 0, 1,-1, 0 };
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static uint8_t read_ab(void){ return (uint8_t)((gpio_get(PIN_A) << 1) | gpio_get(PIN_B)); }
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static void on_edge(uint gpio, uint32_t events){
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uint8_t cur;
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int8_t d;
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(void)events;
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if(gpio != PIN_A && gpio != PIN_B) return;
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cur = read_ab();
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d = TABLE[(prev << 2) | cur];
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steps += d; acc = (int8_t)(acc + d);
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prev = cur;
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if(cur == REST){
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/* a full click is 4 edges; accept 2 or more in case bounce hid some, ignore wiggles of 1 */
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if(acc >= 2) clicks += DIR;
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else if(acc <= -2) clicks -= DIR;
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acc = 0;
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}
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}
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void encoder_init(void){
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gpio_init(PIN_A); gpio_set_dir(PIN_A, GPIO_IN); gpio_pull_up(PIN_A);
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gpio_init(PIN_B); gpio_set_dir(PIN_B, GPIO_IN); gpio_pull_up(PIN_B);
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prev = read_ab();
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gpio_set_irq_enabled_with_callback(PIN_A, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true, on_edge);
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gpio_set_irq_enabled(PIN_B, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true);
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}
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int32_t encoder_count(void){ return clicks; }
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int32_t encoder_steps(void){ return DIR * steps; }
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int encoder_ab(void){ return read_ab(); }
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