spi separated

sound-driver/Makefile

@@ -11,7 +11,7 @@ CFLAGS+= -g3 -ggdb -gdwarf-2
 
 LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
 
-$(ARTIFACT).elf:	main.o scheduler.o psg.o sequencer.o melody.o
+$(ARTIFACT).elf:	main.o scheduler.o spi.o psg.o sequencer.o melody.o
 	$(CC) -o $@ $(LDFLAGS) $^
 	$(OBJDUMP) -D $(ARTIFACT).elf > $(ARTIFACT).txt
 

sound-driver/main.c

@@ -2,18 +2,12 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+#include "spi.h"
 #include "psg.h"
 #include "scheduler.h"
 #include "sequencer.h"
 #include "melody.h"
 
-void __attribute__ ((interrupt (USCIAB0RX_VECTOR))) receive() {
-  if (UC0IFG & UCB0RXIFG) {
-    // receive an octet
-  }
-}
-
-
 int main() {
   WDTCTL = WDTPW | WDTHOLD;
 
@@ -25,22 +19,10 @@ int main() {
   BCSCTL2 = 0;
   BCSCTL3 = 0;
 
-  // SPI slave
-  // BIT4: UCB0STE
-  // BIT5: UCB0CLK
-  // BIT6: UCB0SOMI
-  // BIT7: UCB0SIMO
-  P1SEL |= BIT4 | BIT5 | BIT6 | BIT7;
-  P1SEL2 |= BIT4 | BIT5 | BIT6 | BIT7;
-  // most significant bit first, enable STE
-  UCB0CTL0 = UCSYNC | UCMSB | UCMODE_2;
-  UCB0CTL1 = 0x00;
-  // enable RX interrupt
-  UC0IE |= UCB0RXIE;
-
 
   schInit();
 
+  spiInit();
   psgInit();
   sequencerInit();