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- /*
- * sequence.c
- *
- * Copyright (c) 2024 Thomas Buck (thomas@xythobuz.de)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * See <http://www.gnu.org/licenses/>.
- */
-
- #include <stdio.h>
- #include <inttypes.h>
- #include "pico/stdlib.h"
-
- #include "led.h"
- #include "pulse.h"
- #include "ui.h"
- #include "sequence.h"
-
- static const uint32_t channel_times[NUM_CHANNELS] = CH_GPIO_TIMINGS;
-
- static uint32_t ms_per_beat = 0;
- static uint32_t beats = MAX_BEATS;
- static uint32_t last_t = 0;
- static uint32_t last_i = 0;
- static uint32_t bank = 0;
- static uint32_t beattimer_start = 0;
-
- static enum channels sequence[MAX_BEATS] = {0};
-
- void sequence_init(void) {
- ms_per_beat = 0;
- beats = MAX_BEATS;
- last_t = to_ms_since_boot(get_absolute_time());
- last_i = 0;
-
- for (uint i = 0; i < MAX_BEATS; i++) {
- sequence[i] = 0;
- }
- }
-
- void sequence_set_bpm(uint32_t new_bpm) {
- ms_per_beat = 60000 / new_bpm / beats;
- printf("bpm now %"PRIu32" = %"PRIu32"ms\n", new_bpm, ms_per_beat);
- }
-
- uint32_t sequence_get_bpm(void) {
- return 60000 / (ms_per_beat * beats);
- }
-
- uint32_t sequence_get_ms(void) {
- return ms_per_beat;
- }
-
- void sequence_set_beats(uint32_t new_beats) {
- beats = (new_beats <= MAX_BEATS) ? new_beats : MAX_BEATS;
-
- uint32_t max_banks_currently = (beats + (NUM_BTNS - 1)) / NUM_BTNS;
- bank = (bank < max_banks_currently) ? bank : max_banks_currently;
- }
-
- uint32_t sequence_get_beats(void) {
- return beats;
- }
-
- void sequence_set_bank(uint32_t new_bank) {
- uint32_t b = (new_bank < MAX_BANKS) ? new_bank : MAX_BANKS;
-
- uint32_t max_banks_currently = (beats + (NUM_BTNS - 1)) / NUM_BTNS;
- bank = (b < max_banks_currently) ? b : max_banks_currently;
- }
-
- uint32_t sequence_get_bank(void) {
- return bank;
- }
-
- static void sequence_set(uint32_t beat, enum channels ch, bool value) {
- if (beat < MAX_BEATS) {
- if (value) {
- sequence[beat] |= ch;
- } else {
- sequence[beat] &= ~ch;
- }
- }
- }
-
- static bool sequence_get(uint32_t beat, enum channels ch) {
- if (beat < MAX_BEATS) {
- return (sequence[beat] & ch) != 0;
- }
- return false;
- }
-
- void sequence_handle_button_loopstation(enum buttons btn, bool rec) {
- switch (btn) {
- case BTN_A:
- case BTN_E: {
- pulse_trigger_out(0, channel_times[0]);
- pulse_trigger_led(0, channel_times[0]);
- pulse_trigger_led(4, channel_times[0]);
- break;
- }
-
- case BTN_B:
- case BTN_F: {
- pulse_trigger_out(1, channel_times[1]);
- pulse_trigger_led(1, channel_times[1]);
- pulse_trigger_led(5, channel_times[1]);
- break;
- }
-
- case BTN_C:
- case BTN_G: {
- pulse_trigger_out(2, channel_times[2]);
- pulse_trigger_led(2, channel_times[2]);
- pulse_trigger_led(6, channel_times[2]);
- break;
- }
-
- default: {
- break;
- }
- }
-
- if (rec) {
- switch (btn) {
- case BTN_A:
- case BTN_E: {
- sequence_set(last_i, CH_KICK, true);
- break;
- }
-
- case BTN_B:
- case BTN_F: {
- sequence_set(last_i, CH_SNARE, true);
- break;
- }
-
- case BTN_C:
- case BTN_G: {
- sequence_set(last_i, CH_HIHAT, true);
- break;
- }
-
- default: {
- break;
- }
- }
- }
- }
-
- void sequence_handle_button_drummachine(enum buttons btn) {
- uint32_t beat = 42; // TODO!!
-
- switch (btn) {
- case BTN_A: {
- // TODO kick is wrong here
- bool val = !sequence_get(beat, CH_KICK);
- sequence_set(beat, CH_KICK, val);
- break;
- }
-
- case BTN_B: {
- // TODO snare is wrong here
- bool val = !sequence_get(beat, CH_SNARE);
- sequence_set(beat, CH_SNARE, val);
- break;
- }
-
- case BTN_C: {
- // TODO hihat is wrong here
- bool val = !sequence_get(beat, CH_HIHAT);
- sequence_set(beat, CH_HIHAT, val);
- break;
- }
-
- default: {
- break;
- }
- }
- }
-
- void sequence_looptime(bool fin) {
- if (!fin) {
- beattimer_start = to_ms_since_boot(get_absolute_time());
- } else {
- if (ms_per_beat == 0) {
- uint32_t now = to_ms_since_boot(get_absolute_time());
- uint32_t diff = now - beattimer_start;
- ms_per_beat = diff / beats;
- printf("looptime: diff=%"PRIu32"ms per_beat=%"PRIu32"ms\n", diff, ms_per_beat);
- }
- }
- }
-
- void sequence_run(void) {
- uint32_t now = to_ms_since_boot(get_absolute_time());
-
- if ((ms_per_beat > 0) && (now >= (last_t + ms_per_beat))) {
- //printf("trigger\n");
-
- uint32_t i = last_i + 1;
- if (i >= beats) i = 0;
-
- if (ui_get_machinemode() == MODE_DRUMMACHINE) {
- led_set(last_i, false);
- led_set(i, true);
- }
-
- for (uint ch = 0; ch < NUM_CHANNELS; ch++) {
- if (sequence[i] & (1 << ch)) {
- pulse_trigger_out(ch, channel_times[ch]);
- if (ui_get_machinemode() == MODE_LOOPSTATION) {
- pulse_trigger_led(ch, channel_times[ch]);
- pulse_trigger_led(ch + 4, channel_times[ch]);
- }
- }
- }
-
- last_t = now;
- last_i = i;
- }
- }
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