add mute switch

sound-driver/Makefile

@@ -11,7 +11,7 @@ CFLAGS=-Wall -mmcu=$(MCU) -std=gnu99 -I $(TOOLCHAIN_PREFIX)/include -O1 -g0
 
 LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
 
-$(ARTIFACT).elf:	main.o scheduler.o spi.o sequencer.o melody_tetris.o melody_tusch1.o ay_3_8913.o
+$(ARTIFACT).elf:	main.o scheduler.o spi.o sequencer.o melody_tetris.o melody_tusch1.o ay_3_8913.o mute.o
 	$(CC) -o $@ $(LDFLAGS) $^
 	$(OBJDUMP) -D $(ARTIFACT).elf > $(ARTIFACT).txt
 

sound-driver/main.c

@@ -7,6 +7,7 @@
 #include "scheduler.h"
 #include "sequencer.h"
 #include "melody_tetris.h"
+#include "mute.h"
 
 int main() {
   WDTCTL = WDTPW | WDTHOLD;
@@ -24,6 +25,7 @@ int main() {
 
 //  spiInit();
   psgInit();
+  muteInit();
   sequencerInit();
 
   __enable_interrupt();

sound-driver/mute.c

@@ -0,0 +1,20 @@
+#include <msp430g2553.h>
+#include "mute.h"
+
+
+
+void muteInit() {
+  // BIT6: MuteCtrl
+  P1DIR |= BIT6;
+  P1OUT &= ~BIT6;
+}
+
+void mute() {
+  P1OUT |= BIT6;
+}
+
+void unMute() {
+  P1OUT &= ~BIT6;
+}
+
+

sound-driver/mute.h

@@ -0,0 +1,8 @@
+#ifndef _MUTE_H_
+#define _MUTE_H_
+
+void muteInit();
+void mute();
+void unMute();
+
+#endif // _MUTE_H_

sound-driver/spi.c

@@ -15,8 +15,8 @@ void spiInit() {
   // BIT5: UCB0CLK
   // BIT6: UCB0SOMI
   // BIT7: UCB0SIMO
-  P1SEL |= BIT4 | BIT5 | BIT6 | BIT7;
+  P1SEL |= BIT4 | BIT5 | BIT7;
-  P1SEL2 |= BIT4 | BIT5 | BIT6 | BIT7;
+  P1SEL2 |= BIT4 | BIT5 | BIT7;
 
   // most significant bit first, enable STE
   UCB0CTL0 = UCSYNC | UCMSB | UCMODE_2;