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- /*
- * ui.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 "adc.h"
- #include "buttons.h"
- #include "lcd.h"
- #include "led.h"
- #include "sequence.h"
- #include "ui.h"
-
- #define REDRAW_MS 2000
-
- static bool rec_held_down = false;
- static enum ui_modes ui_mode = 0;
- static enum machine_modes machine_mode = 0;
- static uint32_t last_redraw = 0;
-
- enum machine_modes ui_get_machinemode(void) {
- return machine_mode;
- }
-
- static void ui_redraw(void) {
- char mode[64] = {0};
- char val[64] = {0};
- char bat[64] = {0};
-
- switch (ui_mode) {
- case UI_BPM: {
- snprintf(mode, sizeof(mode) - 1, "BPM:");
- snprintf(val, sizeof(val) - 1, "%"PRIu32, sequence_get_bpm());
- break;
- }
-
- case UI_MODE: {
- if ((machine_mode == MODE_LOOPSTATION) && (sequence_get_ms() != 0)) {
- snprintf(mode, sizeof(mode) - 1, "Mode: %"PRIu32"ms", sequence_get_ms());
- }else {
- snprintf(mode, sizeof(mode) - 1, "Mode:");
- }
- switch (machine_mode) {
- case MODE_LOOPSTATION: {
- snprintf(val, sizeof(val) - 1, "Loop");
- break;
- }
-
- case MODE_DRUMMACHINE: {
- snprintf(val, sizeof(val) - 1, "Drum");
- break;
- }
-
- default: {
- printf("%s: invalid machine mode: %d\n", __func__, machine_mode);
- machine_mode = 0;
- ui_redraw();
- return;
- }
- }
- break;
- }
-
- case UI_LENGTH: {
- snprintf(mode, sizeof(mode) - 1, "Length:");
- snprintf(val, sizeof(val) - 1, "%"PRIu32, sequence_get_beats());
- break;
- }
-
- case UI_BANK: {
- snprintf(mode, sizeof(mode) - 1, "Bank:");
- snprintf(val, sizeof(val) - 1, "%"PRIu32, sequence_get_bank());
- break;
- }
-
- default: {
- printf("%s: invalid mode: %d\n", __func__, ui_mode);
- ui_mode = 0;
- ui_redraw();
- return;
- }
- }
-
- snprintf(bat, sizeof(bat) - 1, "Bat: %.2fV", bat_get());
- lcd_draw(mode, val, bat);
- }
-
- static void ui_buttons_loopstation(enum buttons btn, bool val) {
- switch (btn) {
- case BTN_A:
- case BTN_B:
- case BTN_C:
- case BTN_E:
- case BTN_F:
- case BTN_G: {
- if (val) {
- sequence_handle_button_loopstation(btn, rec_held_down);
- }
- break;
- }
-
- case BTN_REC:
- case BTN_D:
- case BTN_H: {
- rec_held_down = val;
- sequence_looptime(!val);
- break;
- }
-
- default: {
- printf("%s: invalid btn: %d\n", __func__, btn);
- break;
- }
- }
- }
-
- static void ui_buttons_drummachine(enum buttons btn, bool val) {
- switch (btn) {
- case BTN_A:
- case BTN_B:
- case BTN_C:
- case BTN_D:
- case BTN_E:
- case BTN_F:
- case BTN_G:
- case BTN_H:
- case BTN_REC: {
- if (val) {
- sequence_handle_button_drummachine(btn);
- }
- break;
- }
-
- default: {
- printf("%s: invalid btn: %d\n", __func__, btn);
- break;
- }
- }
- }
-
- static void ui_buttons(enum buttons btn, bool val) {
- switch (btn) {
- case BTN_CLICK: {
- if (val) {
- ui_mode = (ui_mode + 1) % UI_NUM_MODES;
-
- // allow other ui modes only in drumkit mode
- if (machine_mode == MODE_LOOPSTATION) {
- ui_mode = 0;
- }
-
- ui_redraw();
- }
- break;
- }
-
- default: {
- switch (machine_mode) {
- case MODE_LOOPSTATION: {
- ui_buttons_loopstation(btn, val);
- break;
- }
-
- case MODE_DRUMMACHINE: {
- ui_buttons_drummachine(btn, val);
- break;
- }
-
- default: {
- printf("%s: invalid mode: %d\n", __func__, machine_mode);
- machine_mode = 0;
- ui_buttons(btn, val);
- break;
- }
- }
- break;
- }
- }
- }
-
- void ui_encoder(int32_t val) {
- if (val == 0) {
- return;
- }
-
- switch (ui_mode) {
- case UI_BPM: {
- sequence_set_bpm(sequence_get_bpm() + val);
- break;
- }
-
- case UI_MODE: {
- int32_t tmp = machine_mode + val;
- while (tmp < 0) {
- tmp += MACHINE_NUM_MODES;
- }
- while (tmp >= MACHINE_NUM_MODES) {
- tmp -= MACHINE_NUM_MODES;
- }
-
- enum machine_modes prev_mode = machine_mode;
- machine_mode = tmp;
-
- printf("mode add %"PRIi32" now %d\n", val, machine_mode);
-
- if (prev_mode != machine_mode) {
- // reset sequence
- sequence_init();
-
- // turn off all LEDs
- for (uint i = 0; i < LED_COUNT; i++) {
- led_set(i, false);
- }
-
- // enable static LEDs in loopstation mode
- if (machine_mode == MODE_LOOPSTATION) {
- led_set(NUM_CHANNELS, true);
- led_set(NUM_CHANNELS + 4, true);
- }
- }
- break;
- }
-
- case UI_LENGTH: {
- sequence_set_beats(sequence_get_beats() + val);
- break;
- }
-
- case UI_BANK: {
- sequence_set_bank(sequence_get_bank() + val);
- break;
- }
-
- default: {
- printf("%s: invalid mode: %d\n", __func__, ui_mode);
- ui_mode = 0;
- ui_encoder(val);
- return;
- }
- }
-
- ui_redraw();
- }
-
- void ui_init(void) {
- buttons_callback(ui_buttons);
-
- // enable static LEDs in loopstation mode
- machine_mode = MODE_LOOPSTATION;
- led_set(NUM_CHANNELS, true);
- led_set(NUM_CHANNELS + 4, true);
-
- ui_redraw();
- }
-
- void ui_run(void) {
- uint32_t now = to_ms_since_boot(get_absolute_time());
- if (now >= (last_redraw + REDRAW_MS)) {
- ui_redraw();
- last_redraw = now;
- }
- }
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