simplify mario song

notes.c

@@ -24,6 +24,69 @@
 #define MARIO		50
 
 unsigned short freqs[] = {
+	// PD3-7
+	100,
+	200,
+	250,
+	300,
+	350,
+	// PB0-4
+	400,
+	450,	// middle c
+	500,
+	600,
+	700,
+	// PC0-4
+	750,
+	800,
+	850,
+	900,
+	950,
+
+	// notes
+	[MARIO] = 131,	// C3
+	262,	// C4
+	110,	// A2
+	220,	// A3
+	117,	// Bb2
+	233,	// Bb3
+
+	87,
+	175,
+	73,
+	147,
+	78,
+	156,
+
+	156,
+	147,
+	139,
+	131,
+	156,
+	147,
+	104,
+	98,
+	139,
+
+	156,
+	185,
+	175,
+	165,
+	233,
+	220,
+	208,
+	156,
+	123,
+	123,
+	110,
+	104,
+
+	['"'] = 16000,
+
+	[255] = 0	// used as a 'silent' note
+};
+
+unsigned short t_freqs[] = {
 	// PD3-7
 	FREQ(100),
 	FREQ(200),
@@ -86,8 +149,9 @@ unsigned short freqs[] = {
 	[255] = 0	// used as a 'silent' note
 };
 unsigned char note = 0;
-// 0 = buttons write note+cycles+\xff to UART
+// 0 = normal/piano mode
-// 1 = buttons don't do anything, speaker reads note+cycles+\xff from UART
+// 1 = recording mode
+// 2 = mario demo
 unsigned char mode = '0';
 
 ISR (PCINT0_vect)
@@ -126,9 +190,9 @@ ISR (PCINT2_vect)
 void
 usart_init(void)
 {
-	// 115200 bps, RX/TX enabled
+	// 9600 bps, TX enabled
 	UBRR0 = 103;
-	UCSR0B = (1 << RXEN0) | (1 << TXEN0);
+	UCSR0B = 1 << TXEN0;
 	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
 }
 
@@ -158,7 +222,7 @@ playtone(void)
 {
 	// Prepare Timer/Counter
 	TCNT1 = 1;
-	OCR1A = freqs[note];
+	OCR1A = t_freqs[note];
 	TCCR1B |= 1 << CS11;
 
 	// Monitor OutPut Compare Flag
@@ -177,24 +241,10 @@ play_note(unsigned char _note, unsigned short _cycles)
 
 	usart_send(note);
 
-	if (note != 255) {
 	for (unsigned short i = 0; i < _cycles; i++)
 		playtone();
-	} else {
-		// when note is 255, don't play anything for _cycles ms
-		// Prepare Timer/Counter
-		TCNT1 = 1;
-		OCR1A = 16e3 * _cycles / T1_PRESCALAR;
-		TCCR1B |= 1 << CS11;
 
-		// Monitor OutPut Compare Flag
+	_delay_ms(25);
-		while ((TIFR1 & (1 << OCF1A)) == 0);
-
-		// Toggles port For Speaker
-		PORTD ^= 1 << P_SPKR;
-		TIFR1 |= 1 << OCF1A;
-		TCCR1B &= ~(1 << CS11);
-	}
 }
 
 int
@@ -224,6 +274,8 @@ main(void)
 	for (unsigned char n = 0;; n = (n + 1) % 2) {
 		if (PINC & _BV(5))
 			mode = '2';
+		else if (PINB & _BV(5))
+			mode = '3';
 		else
 			mode = '0';
 
@@ -243,79 +295,30 @@ main(void)
 			playtone();
 
 			cycles = (cycles + 1) % 0xffff;
-		} else if (mode == '2') {
+		} else if (mode == '1') {
-			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);
-			_delay_ms(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);
-			_delay_ms(1800);
 			
-			play_note(MARIO + 6, 87 * 0.3);
+		} else if (mode == '3') {
-			play_note(MARIO + 7, 175 * 0.3);
+			for (unsigned char i = 0; i < 2; i++) {
-			play_note(MARIO + 8, 73 * 0.3);
+				for (unsigned char j = 0; j <= 5; j++)
-			play_note(MARIO + 9, 147 * 0.3);
+					play_note(MARIO + j, freqs[MARIO + j] * 0.3);
-			play_note(MARIO + 10, 78 * 0.3);
-			play_note(MARIO + 11, 156 * 0.3);
 				_delay_ms(1800);
-			play_note(MARIO + 6, 87 * 0.3);
+			}
-			play_note(MARIO + 7, 175 * 0.3);
+
-			play_note(MARIO + 8, 73 * 0.3);
+			for (unsigned char i = 0; i < 2; i++) {
-			play_note(MARIO + 9, 147 * 0.3);
+				for (unsigned char j = 6; j <= 11; j++)
-			play_note(MARIO + 10, 78 * 0.3);
+					play_note(MARIO + j, freqs[MARIO + j] * 0.3);
-			play_note(MARIO + 11, 156 * 0.3);
 				_delay_ms(1800);
+			}
 
-			play_note(MARIO + 12, 156 * 0.3);
+			for (unsigned char i = 12; i <= 14; i++)
-			_delay_ms(25);
+				play_note(MARIO + i, freqs[MARIO + i] * 0.3);
-			play_note(MARIO + 13, 147 * 0.3);
+			for (unsigned char i = 15; i <= 20; i++)
-			_delay_ms(25);
+				play_note(MARIO + i, freqs[MARIO + i] * 0.6);
-			play_note(MARIO + 14, 139 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 15, 131 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 16, 156 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 17, 147 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 18, 104 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 19, 98 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 20, 139 * 0.6);
 
-			play_note(MARIO + 21, 156 * 0.3);
+			for (unsigned char i = 21; i <= 26; i++)
-			_delay_ms(25);
+				play_note(MARIO + i, freqs[MARIO + i] * 0.3);
-			play_note(MARIO + 22, 185 * 0.3);
+			for (unsigned char i = 27; i <= 32; i++)
-			_delay_ms(25);
+				play_note(MARIO + i, freqs[MARIO + i] * 0.6);
-			play_note(MARIO + 23, 175 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 24, 165 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 25, 233 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 26, 220 * 0.3);
-			_delay_ms(25);
-			play_note(MARIO + 27, 208 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 28, 156 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 29, 123 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 30, 123 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 31, 110 * 0.6);
-			_delay_ms(25);
-			play_note(MARIO + 32, 104 * 0.6);
-			_delay_ms(25);
 		}
 	}
 }