commit ece65dcc2a11b6f22eed9ce583075f82ca177064
parent 6a28f45c514cdacf47d466f14b0bc69abccd064f
Author: Vineet K <git@vineetk.net>
Date: Sun, 21 Apr 2024 20:46:46 -0400
play NES SMB Underground theme for testing
Diffstat:
| M | notes.c | | | 213 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------- |
1 file changed, 179 insertions(+), 34 deletions(-)
diff --git a/notes.c b/notes.c
@@ -8,6 +8,9 @@
#include <avr/io.h>
#include <avr/interrupt.h>
+#define F_CPU 16e6
+#include <util/delay.h>
+
#define T1_PRESCALAR 8
#define FREQ(f) (16e6 / f / T1_PRESCALAR / 2)
@@ -18,8 +21,11 @@
#define P_TX 1
#define P_SPKR 2
+#define MARIO 50
+
unsigned short freqs[] = {
// PD3-7
+#if 0
FREQ(100),
FREQ(200),
FREQ(250),
@@ -27,18 +33,74 @@ unsigned short freqs[] = {
FREQ(350),
// PB0-4
FREQ(400),
+#else
+ FREQ(131), // middle c
+ FREQ(262),
+ FREQ(110),
+ FREQ(220),
+ FREQ(117),
+ FREQ(233),
+#endif
FREQ(500),
- FREQ(600),
- FREQ(700),
- FREQ(750),
+ FREQ(6000),
+ FREQ(5000),
+ FREQ(5500),
// PC0-4
- FREQ(1000),
- FREQ(1250),
- FREQ(1500),
- FREQ(1750),
- FREQ(2000),
+ FREQ(4000),
+ FREQ(7250),
+ FREQ(6500),
+ FREQ(5750),
+ FREQ(5000),
+ FREQ(5000),
+ FREQ(6000),
+ FREQ(7000),
+ FREQ(8000),
+ FREQ(8000),
+ FREQ(8000),
+ FREQ(8000),
+ FREQ(8000),
+
+ // notes
+ [MARIO] = FREQ(131), // C3
+ FREQ(262), // C4
+ FREQ(110), // A2
+ FREQ(220), // A3
+ FREQ(117), // Bb2
+ FREQ(233), // Bb3
+
+ FREQ(87),
+ FREQ(175),
+ FREQ(73),
+ FREQ(147),
+ FREQ(78),
+ FREQ(156),
+
+ FREQ(156),
+ FREQ(147),
+ FREQ(139),
+ FREQ(131),
+ FREQ(156),
+ FREQ(147),
+ FREQ(104),
+ FREQ(98),
+ FREQ(139),
+
+ FREQ(156),
+ FREQ(185),
+ FREQ(175),
+ FREQ(165),
+ FREQ(233),
+ FREQ(220),
+ FREQ(208),
+ FREQ(156),
+ FREQ(123),
+ FREQ(123),
+ FREQ(110),
+ FREQ(104),
- [32] = 0 // used as a 'silent' note
+ ['"'] = FREQ(16000),
+
+ [255] = 0 // used as a 'silent' note
};
unsigned char note = 0;
// 0 = buttons write note+cycles+\xff to UART
@@ -108,6 +170,36 @@ usart_read(void)
return UDR0;
}
+void
+playtone(void)
+{
+ // Prepare Timer/Counter
+ TCNT1 = 1;
+ OCR1A = freqs[note];
+ TCCR1B |= 1 << CS11;
+
+ // Monitor OutPut Compare Flag
+ while ((TIFR1 & (1 << OCF1A)) == 0);
+
+ // Toggles port For Speaker
+ PORTD ^= 1 << P_SPKR;
+ TIFR1 |= 1 << OCF1A;
+ TCCR1B &= ~(1 << CS11);
+}
+
+void
+play_note(unsigned char _note, unsigned short _cycles)
+{
+ note = _note;
+
+ if (note != 255) {
+ for (unsigned short i = 0; i < _cycles; i++)
+ playtone();
+ } else {
+ _delay_ms(_cycles);
+ }
+}
+
int
main(void)
{
@@ -139,7 +231,7 @@ main(void)
usart_send(mode);
}
// check if any buttons are pressed, otherwise don't play a note
- if (mode != '1' && ((PINB & PCMSK0) | (PINC & PCMSK1) | (PIND & PCMSK2)) == 0) {
+ if (mode == '0' && ((PINB & PCMSK0) | (PINC & PCMSK1) | (PIND & PCMSK2)) == 0) {
// if a button was released, then send note and cycles played
if (cycles > 0) {
usart_send(tmp);
@@ -152,23 +244,14 @@ main(void)
}
if (mode == '0') {
- // Prepare Timer/Counter
- TCNT1 = 1;
tmp = note;
- OCR1A = freqs[note];
- TCCR1B |= 1 << CS11;
- // Monitor OutPut Compare Flag
- while ((TIFR1 & (1 << OCF1A)) == 0);
+ playtone();
- // Toggles port For Speaker
- PORTD ^= 1 << P_SPKR;
- TIFR1 |= 1 << OCF1A;
- TCCR1B &= ~(1 << CS11);
cycles = (cycles + 1) % 0xffff;
} else if (mode == '1') {
note = usart_read();
- if (note >= '0') note -= '0';
+ if (note >= 'Z') note -= '0';
tmp = usart_read();
cycles = tmp << 8;
tmp = usart_read();
@@ -176,26 +259,88 @@ main(void)
tmp = usart_read();
// reset to default mode when an invalid note is read
- if (tmp != 'z' || note > '@') {
+ if (tmp != 'z' || note >= '|') {
mode = '0';
continue;
}
- for (unsigned short i = 0; i < cycles; i++) {
- usart_send(HIGH(cycles));
- usart_send(LOW(cycles));
- usart_send(0);
+ for (unsigned short i = 0; i < cycles; i++)
+ playtone();
+ } else if (mode == '2') {
+ play_note(MARIO + 0, 131 * 0.3);
+ play_note(MARIO + 1, 262 * 0.3);
+ play_note(MARIO + 2, 110 * 0.3);
+ play_note(MARIO + 3, 220 * 0.3);
+ play_note(MARIO + 4, 117 * 0.3);
+ play_note(MARIO + 5, 233 * 0.3);
+ play_note(255, 1800);
+ play_note(MARIO + 0, 131 * 0.3);
+ play_note(MARIO + 1, 262 * 0.3);
+ play_note(MARIO + 2, 110 * 0.3);
+ play_note(MARIO + 3, 220 * 0.3);
+ play_note(MARIO + 4, 117 * 0.3);
+ play_note(MARIO + 5, 233 * 0.3);
+ play_note(255, 1800);
- TCNT1 = 1;
- OCR1A = freqs[note];
- TCCR1B |= 1 << CS11;
+ play_note(MARIO + 6, 87 * 0.3);
+ play_note(MARIO + 7, 175 * 0.3);
+ play_note(MARIO + 8, 73 * 0.3);
+ play_note(MARIO + 9, 147 * 0.3);
+ play_note(MARIO + 10, 78 * 0.3);
+ play_note(MARIO + 11, 156 * 0.3);
+ play_note(255, 1800);
+ play_note(MARIO + 6, 87 * 0.3);
+ play_note(MARIO + 7, 175 * 0.3);
+ play_note(MARIO + 8, 73 * 0.3);
+ play_note(MARIO + 9, 147 * 0.3);
+ play_note(MARIO + 10, 78 * 0.3);
+ play_note(MARIO + 11, 156 * 0.3);
+ play_note(255, 1800);
- while ((TIFR1 & (1 << OCF1A)) == 0);
+ play_note(MARIO + 12, 156 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 13, 147 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 14, 139 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 15, 131 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 16, 156 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 17, 147 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 18, 104 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 19, 98 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 20, 139 * 0.6);
- PORTD ^= 1 << P_SPKR;
- TIFR1 |= 1 << OCF1A;
- TCCR1B &= ~(1 << CS11);
- }
+ play_note(MARIO + 21, 156 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 22, 185 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 23, 175 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 24, 165 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 25, 233 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 26, 220 * 0.3);
+ play_note(255, 25);
+ play_note(MARIO + 27, 208 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 28, 156 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 29, 123 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 30, 123 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 31, 110 * 0.6);
+ play_note(255, 25);
+ play_note(MARIO + 32, 104 * 0.6);
+ play_note(255, 25);
+
+ play_note(255, 3600);
}
}
}
