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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>
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
#include "storage.h"
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#include "hardware/flash.h"
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#include "pico/flash.h"
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#include <stddef.h>
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#include <string.h>
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#define MAGIC 0x53425831u /* "SBX1" */
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#define VERSION 2 /* 2: ROOT / SCALE added, BANK gone. Older records are ignored. */
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#define OFFSET (PICO_FLASH_SIZE_BYTES - FLASH_SECTOR_SIZE)
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#define BUFSZ 512
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typedef struct {
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uint32_t magic, version;
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uint32_t seed, salts[2];
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int32_t gen, bpm, scale, root, mono_ch, mono_oct;
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uint8_t on[SB_NT];
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pad_t learn[NKIT];
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slot_t slots[NSLOTS];
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uint32_t crc;
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} record_t;
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_Static_assert(sizeof(record_t) <= BUFSZ, "record too big");
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static uint32_t crc(const record_t *r){
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const uint8_t *p = (const uint8_t *)r;
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uint32_t h = 0x811C9DC5u;
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size_t i;
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for(i = 0; i < offsetof(record_t, crc); i++) h = (h ^ p[i]) * 0x01000193u;
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return h;
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}
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/* defaults from app.js DEF and app */
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void storage_defaults(live_t *L, slot_t *slots){
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int t;
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memset(L, 0, sizeof *L);
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L->state.seed = 0x5EEDB0C5u;
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L->gen = 0; L->scale = -1; L->root = -1; L->energy = 64; L->drift = 32; L->bpm = 165;
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for(t = 0; t < SB_NT; t++) L->on[t] = 1;
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L->mono_ch = 1; L->mono_oct = 0; L->clock = 1;
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memset(slots, 0, sizeof(slot_t) * NSLOTS);
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}
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int storage_load(live_t *L, slot_t *slots){
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const record_t *r = (const record_t *)(XIP_BASE + OFFSET);
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int t;
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storage_defaults(L, slots);
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if(r->magic != MAGIC || r->version != VERSION || r->crc != crc(r)) return 0;
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L->state.seed = r->seed; L->state.salts[0] = r->salts[0]; L->state.salts[1] = r->salts[1];
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L->gen = r->gen; L->bpm = r->bpm; L->scale = r->scale; L->root = r->root; L->mono_ch = r->mono_ch; L->mono_oct = r->mono_oct;
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for(t = 0; t < SB_NT; t++) L->on[t] = r->on[t] ? 1 : 0;
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memcpy(L->learn, r->learn, sizeof L->learn);
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memcpy(slots, r->slots, sizeof r->slots);
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return 1;
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}
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static void do_write(void *buf){
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flash_range_erase(OFFSET, FLASH_SECTOR_SIZE);
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flash_range_program(OFFSET, (const uint8_t *)buf, BUFSZ);
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}
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int storage_save(const live_t *L, const slot_t *slots){
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static uint8_t buf[BUFSZ] __attribute__((aligned(4)));
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record_t *r = (record_t *)buf;
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memset(buf, 0xFF, sizeof buf);
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memset(r, 0, sizeof *r);
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r->magic = MAGIC; r->version = VERSION;
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r->seed = L->state.seed; r->salts[0] = L->state.salts[0]; r->salts[1] = L->state.salts[1];
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r->gen = L->gen; r->bpm = L->bpm; r->scale = L->scale; r->root = L->root; r->mono_ch = L->mono_ch; r->mono_oct = L->mono_oct;
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memcpy(r->on, L->on, sizeof r->on);
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memcpy(r->learn, L->learn, sizeof r->learn);
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memcpy(r->slots, slots, sizeof r->slots);
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r->crc = crc(r);
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return flash_safe_execute(do_write, buf, 500) == PICO_OK;
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}
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