sound works

sound-driver/spi_init.c

@@ -0,0 +1,31 @@
+#include <stddef.h>
+#include <msp430g2553.h>
+#include <stdint.h>
+#include "scheduler.h"
+#include "spi.h"
+#include "soundCodes.h"
+
+
+extern uint8_t cmd;
+
+void spiInit() {
+  // SPI slave
+  // BIT4: UCB0STE
+  // BIT5: UCB0CLK
+  // BIT6: UCB0SOMI
+  // BIT7: UCB0SIMO
+  P1SEL |= BIT4 | BIT5 | BIT7;
+  P1SEL2 |= BIT4 | BIT5 | BIT7;
+
+  // most significant bit first, enable STE
+  UCB0CTL0 = UCSYNC | UCMSB | UCMODE_2;
+  UCB0CTL1 = 0x00;
+
+  // enable RX interrupt
+  UC0IE |= UCB0RXIE;
+
+  cmd = SOUND_IDLE;
+  schAdd(spiCmdHandler, NULL, 0, 100);
+}
+
+