X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Farm.git;a=blobdiff_plain;f=betty%2Fbetty.c;h=3a3e7a51313d9f398055ad43ce54508b5abffd0a;hp=bac66143a21d14c53f875da34132b7375c49e396;hb=HEAD;hpb=b75b1bf631a3bb68f50f65c65736b1bf743f51b7

diff --git a/betty/betty.c b/betty/betty.c
index bac6614..3a3e7a5 100644
--- a/betty/betty.c
+++ b/betty/betty.c
@@ -17,6 +17,7 @@ const char d1_txt[]="betty";
 const char d2_txt[]="- alphablend -";
 u8 contrast;
 t_button button;
+int sample_count;
 
 /*
  * functions
@@ -37,6 +38,33 @@ void display_string_page(u8 x,u8 p,u8 *s,u8 f,u8 o,u8 sp) {
 	}
 }
 
+void audio_mute_toggle(void) {
+
+	if(IOPIN0&(1<<11))
+		IOCLR0=(1<<11);
+	else
+		IOSET0=(1<<11);
+}
+
+#define AUDIO_TONE_C	(7500000/(262*256))
+#define AUDIO_TONE_D	(7500000/(294*256))
+#define AUDIO_TONE_E	(7500000/(330*256))
+#define AUDIO_TONE_F	(7500000/(349*256))
+#define AUDIO_TONE_G	(7500000/(392*256))
+//#define AUDIO_TONE_A	(7500000/(440*256))
+#define AUDIO_TONE_A	120
+#define AUDIO_TONE_H	(7500000/(494*256))
+
+void __attribute__ ((interrupt("IRQ"))) set_sample(void) {
+
+	//uart0_send_byte('S');
+	pwm_update_match(PWM_CHAN2,PWM_SINGLE_EDGE,sinus[sample_count++],0);
+	if(sample_count==0xff)
+		sample_count=0;
+	interrupt_ack();
+	interrupt_tc_ir_set(INTERRUPT_TC0,INTERRUPT_MATCH0);
+}
+
 void __attribute__ ((interrupt("IRQ"))) input_event(void) {
 
 	u8 noret,tries;
@@ -106,6 +134,9 @@ void __attribute__ ((interrupt("IRQ"))) input_event(void) {
 				display_string_page(10,8,(u8 *)d2_txt,
 				                    DISPLAY_FILL_B,0,8);
 				break;
+			case BUTTON_MUTE:
+				audio_mute_toggle();
+				break;
 			default:
 				display_clear_screen();
 				break;
@@ -135,6 +166,9 @@ int main() {
 
 	/* variables */
 
+	/* init */
+	sample_count=0;
+
 	/* system init */
 	pll_init();
 	pin_init();
@@ -166,12 +200,32 @@ int main() {
 
 	/* interrupt init */
 	interrupt_init();
+
+	// ext interrupt
 	interrupt_ext_ir_config(INTERRUPT_EXT3,INTERRUPT_EXT_NOWAKE,
 	                        INTERRUPT_EXT_MODE_EDGE,
 	                        INTERRUPT_EXT_POLAR_LOW);
 	interrupt_ext_ir_set(INTERRUPT_EXT3);
 	interrupt_enable(INTERRUPT_EINT3,INTERRUPT_MODE_VIRQ,
-	                 0,(u32)input_event);
+	                 0,(u32)&input_event);
+
+	// timer interrupt
+	interrupt_tc_config(INTERRUPT_TC0,INTERRUPT_TC_MODE_T,0,0);
+	interrupt_tc_match_config(INTERRUPT_TC0,INTERRUPT_M0,AUDIO_TONE_A,
+	                          INTERRUPT_TC_MATCH_IR|
+	                          INTERRUPT_TC_MATCH_RESET);
+	interrupt_tc_ir_set(INTERRUPT_TC0,INTERRUPT_MATCH0);
+	interrupt_enable(INTERRUPT_TIMER0,INTERRUPT_MODE_VIRQ,
+	                 1,(u32)&set_sample);
+	interrupt_tc_enable(INTERRUPT_TC0);
+
+	/* pwm init */
+	pwm_reset;
+	pwm_set_rate_and_prescaler(0xff,0);
+	pwm_config(PWM_CHAN2,PWM_SINGLE_EDGE,0,0);
+	pwm_match_ctrl_config(PWM_CHAN2,PWM_MATCH_RESET);
+	pwm_enable;
+	
 
 	/*
 	 * start it ...