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#include <string.h>
#include "common.h"
#include "gba-buttons.c"
#include "background-tiles.c"
#include "sprites.h"
#include "text.h"
//
// Main functions.
//
// TODO: Cleanup OBJ/OAM memory copying and access.
//
int main(void) {
// Configure the display in mode 0 to show OBJs, where tile memory is
// sequential.
DISP_CTRL = DISP_ENABLE_SPRITES | DISP_MODE_0 | DISP_BG_0;
// Initialize sprite button overlay.
init_sprite_pal(0, COLOR_WHITE);
init_sprites(0);
init_button_sprites();
// Initialize text engine.
txt_init(0, COLOR_RED, 0);
// Register interrupts.
irq_init();
irs_set(IRQ_VBLANK, irs_stub);
// turn sound on
SOUND_STATUS = SOUND_ENABLE;
SOUND_DMG_MASTER = sound_volume(SOUND_SQUARE1 | SOUND_SQUARE2, 7);
SOUND_DSOUND_MASTER = SOUND_DMG100;
Note active_note = NOTE_C_4;
int octave_diff = 0;
bool playing = false;
bool new_note = false;
u8 interval = 7;
u32 sound_sequence[16] = {
NOTE_C_4,
NOTE_A_4,
NOTE_D_5,
NOTE_D_4,
NOTE_F_4,
NOTE_G_4,
NOTE_C_4,
NOTE_A_4,
NOTE_D_5,
NOTE_D_4,
NOTE_F_4,
NOTE_G_4,
NOTE_A_4,
NOTE_G_4,
NOTE_A_4,
NOTE_F_4,
};
int step_counter = 0;
int step_counter_2 = 0;
int frame_counter = 0;
bool trigger_1 = true;
bool trigger_2 = true;
while(true) {
bios_vblank_wait();
poll_keys();
txt_position(0, 1);
if (frame_counter >= 7 * 4) {
if ((step_counter + 1) % 4 == 0) {
step_counter_2 = (step_counter_2 + 1) % 16;
trigger_2 = true;
}
trigger_1 = true;
frame_counter = 0;
step_counter = (step_counter + 1) % 16;
}
if (trigger_1 && playing) {
active_note = sound_sequence[step_counter];
txt_clear_line();
txt_printf("SYNTH 1\n\n");
txt_clear_line();
txt_printf("Step: %d\n", step_counter);
txt_clear_line();
txt_printf("Playing: %s\n\n\n\n", note_names[active_note]);
SOUND_SQUARE1_CTRL = SOUND_SQUARE_ENV_VOL(13) | SOUND_SQUARE_ENV_TIME(4) | SOUND_SQUARE_DUTY(1);
SOUND_SQUARE1_FREQ = SOUND_SQUARE_RESET | sound_rates[active_note];
trigger_1 = false;
}
if (trigger_2 && playing) {
active_note = sound_sequence[step_counter_2];
txt_clear_line();
txt_printf("SYNTH 2\n\n");
txt_clear_line();
txt_printf("Step: %d\n", step_counter_2);
txt_clear_line();
txt_printf("Playing: %s\n", note_names[active_note]);
SOUND_SQUARE2_CTRL = SOUND_SQUARE_ENV_VOL(12) | SOUND_SQUARE_ENV_TIME(3) | SOUND_SQUARE_DUTY(3);
SOUND_SQUARE2_FREQ = SOUND_SQUARE_RESET | sound_rates[active_note];
trigger_2 = false;
}
if (key_pressed(KEY_B)) {
playing = true;
step_counter = 0;
step_counter_2 = 8;
frame_counter = 0;
trigger_1 = true;
trigger_2 = true;
}
if (key_pressed(KEY_A)) {
playing = false;
}
frame_counter++;
// update_button_sprites();
};
return 0;
}
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