Add waveform selection to demo software

Available waveforms: Sawtooth, Square, Triangle, Sine (To be completed)

demo/main.cpp

@@ -91,7 +91,10 @@ static void help(void) {
 	puts("leds               - Led set demo");
 #endif
 #ifdef CSR_AUDIO_BASE
-	puts("saw                - Sawtooth Audio demo");
+	puts("saw                - Sawtooth Wave demo");
+	puts("square             - Square Wave demo");
+	puts("triangle           - Triangle Wave demo");
+	puts("sine               - Sine Wave demo");
 	puts("imperial           - Imperial March demo");
 	puts("roll               - Music demo");
 #endif
@@ -123,7 +126,29 @@ static void leds_cmd(char **val) {
 #ifdef CSR_AUDIO_BASE
 static void saw_cmd(char **val) {
 	int value = (int)strtol(get_token(val), NULL, 0);
-	printf("Setting Sawtooth to %dHz\n", value);
+	printf("Setting Oscillator 0 to Sawtooth: %dHz\n", value);
+	wave(WAVE_SAW);
+	audio_targ0_write(value);
+}
+
+static void square_cmd(char **val) {
+	int value = (int)strtol(get_token(val), NULL, 0);
+	printf("Setting Oscillator 0 to Square: %dHz\n", value);
+	wave(WAVE_SQUARE);
+	audio_targ0_write(value);
+}
+
+static void triangle_cmd(char **val) {
+	int value = (int)strtol(get_token(val), NULL, 0);
+	printf("Setting Oscillator 0 to Triangle: %dHz\n", value);
+	wave(WAVE_TRIANGLE);
+	audio_targ0_write(value);
+}
+
+static void sine_cmd(char **val) {
+	int value = (int)strtol(get_token(val), NULL, 0);
+	printf("Setting Oscillator 0 to Sine: %dHz\n", value);
+	wave(WAVE_SINE);
 	audio_targ0_write(value);
 }
 
@@ -223,6 +248,12 @@ static void console_service(void) {
 #ifdef CSR_AUDIO_BASE
 	else if (strcmp(token, "saw") == 0)
 		saw_cmd(&str);
+	else if (strcmp(token, "square") == 0)
+		square_cmd(&str);
+	else if (strcmp(token, "triangle") == 0)
+		triangle_cmd(&str);
+	else if (strcmp(token, "sine") == 0)
+		sine_cmd(&str);
 	else if (strcmp(token, "imperial") == 0)
 		imperial_cmd();
 	else if (strcmp(token, "roll") == 0)

demo/note

@@ -5,6 +5,7 @@
 // Function Definition
 
 void note(uint32_t frequency, unsigned int duration_ms);
+void wave(uint32_t wave);
 
 // Notes
 
@@ -76,3 +77,10 @@ void note(uint32_t frequency, unsigned int duration_ms);
 #define NOTE_B6 1976
 
 #define NOTE_C7 2093
+
+// Waves
+
+#define WAVE_SAW 0
+#define WAVE_SQUARE 1
+#define WAVE_TRIANGLE 2
+#define WAVE_SINE 3

demo/note.cpp

@@ -6,3 +6,7 @@ void note(uint32_t frequency, unsigned int duration_ms) {
 	busy_wait(duration_ms);
 	audio_targ0_write(0);
 }
+
+void wave(uint32_t wave) {
+	audio_wave0_write(wave);
+}