66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
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#include <inttypes.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#define __DELAY_BACKWARD_COMPATIBLE__
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#include <util/delay.h>
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#include <stdlib.h>
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#include <avr/pgmspace.h>
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#include <lib/bughal.h>
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#include <lib/freq_table.h>
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#include <lib/apps.h>
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static uint16_t osc;
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static uint16_t sample;
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static uint8_t row;
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#define LENGTH(x) (sizeof(x) / sizeof(x[0]))
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static const uint8_t mushroom[] = {6,1,6,10,13,18,13,1,6,8,13,8,13,18,20,25,20,3,8,11,15,11,15,20,23,27,23};
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static void mariofx_ISR(void) {
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if (row < LENGTH(mushroom)) {
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osc += pgm_read_word(&freq_table[mushroom[row] + 18]) * 3;
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if (++sample == 800 ) {
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sample = 0;
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row++;
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}
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} else {
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if (btn_state(BTNST_SUP, BTN_RIGHT)) {
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button_clear(BTN_RIGHT);
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row = 0;
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}
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}
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if (osc >= 0xc000) {
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PORTB |= (1 << PORTB2);
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PORTC &= ~(1<< PORTC5);
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}
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else {
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PORTB &= ~(1<< PORTB2);
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PORTC |= (1 << PORTC5);
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}
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}
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static void mariofx(void) {
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/* initialisation required */
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if (mode_uninitialized) {
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mode_uninitialized = false;
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init_buzzr();
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osc = sample = row = 0;
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start_timer(mariofx_ISR);
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}
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/*deinialisation required */
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if (mode_last_tick) {
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stop_timer();
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}
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return;
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}
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REGISTER(mariofx);
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