prepare display

game-ctrl/Makefile

@@ -11,7 +11,7 @@ CFLAGS=-Wall -mmcu=$(MCU) -std=gnu99 -I $(TOOLCHAIN_PREFIX)/include -O1 -g0
 
 LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
 
-$(ARTIFACT).elf:	main.o spi.o scheduler.o canvas.o shapes.o game.o buttons.o myrand.o
+$(ARTIFACT).elf:	main.o spi.o scheduler.o canvas.o shapes.o game.o buttons.o myrand.o display.o
 	$(CC) -o $@ $(LDFLAGS) $^
 	$(OBJDUMP) -D $(ARTIFACT).elf > $(ARTIFACT).txt
 

game-ctrl/display.c

@@ -0,0 +1,50 @@
+#include <stdint.h>
+
+#include "display.h"
+#include "spi.h"
+
+
+uint16_t score;
+
+
+void displayInit() {
+  score = 0;
+
+  spiSendBegin(e_SPI_DISPLAY);
+
+  // display test off
+  spiSendOctet(0x0f);
+  spiSendOctet(0x01);
+
+  // BCD decode for all digits
+  spiSendOctet(0x09);
+  spiSendOctet(0xff);
+
+  // scan limit to digits 0-3
+  spiSendOctet(0x0b);
+  spiSendOctet(0x03);
+
+  // intensity
+  spiSendOctet(0x0a);
+  spiSendOctet(0x0f);
+
+
+  // normal operation
+  spiSendOctet(0x0C);
+  spiSendOctet(0x01);
+
+  spiSendEnd(e_SPI_DISPLAY);
+}
+
+
+
+void displaySetScore(uint16_t v) {
+  score = v;
+
+  spiSendBegin(e_SPI_DISPLAY);
+
+  spiSendOctet(0x01);
+  spiSendOctet(0x07);
+
+  spiSendEnd(e_SPI_DISPLAY);
+}

game-ctrl/display.h

@@ -0,0 +1,13 @@
+#ifndef _DISPLAY_H_
+#define _DISPLAY_H_
+
+#include <stdint.h>
+
+
+void displayInit();
+void displaySetScore(uint16_t v);
+
+
+
+
+#endif // _DISPLAY_H_

game-ctrl/game.c

@@ -6,6 +6,7 @@
 #include "shapes.h"
 #include "canvas.h"
 #include "../rgb-driver/colors.h"
+#include "display.h"
 
 
 #define GAME_CYCLE_TIME 100
@@ -116,6 +117,8 @@ void gameExec(void *handle) {
       }
     }
   }
+
+  displaySetScore(7);
 }
 
 void gameInit() {

game-ctrl/main.c

@@ -11,6 +11,7 @@
 #include "shapes.h"
 #include "myrand.h"
 #include "spi.h"
+#include "display.h"
 
 
 int main() {
@@ -27,6 +28,7 @@ int main() {
     schInit();
 
     spiInit();
+    displayInit();
     myRandInit();
     canvasInit();
 

game-ctrl/spi.c

@@ -2,8 +2,8 @@
 #include "spi.h"
 
 void spiInit() {
-  // SPI in master mode
+  // SPI in master mode, most significant bit first
-  UCB0CTL0 = UCMST;
+  UCB0CTL0 = UCMST | UCMSB;
   // SPI timing config
   UCB0CTL1 = UCSSEL_3;
   // Faster than 8 ends up in strange communication errors

rgb-driver/main.S

@@ -122,8 +122,8 @@ init:
   mov.w   #OUTMOD_7,&TA1CCTL2
 
   ;; spi configuration
-  ;;  USCI B to slave mode
+  ;;  USCI B to slave mode, enable STE and most significant bit first
-  mov.b   #UCSYNC|UCMODE_2, &UCB0CTL0
+  mov.b   #UCSYNC|UCMODE_2|UCMSB, &UCB0CTL0
   mov.b   #0x00, &UCB0CTL1
 
   ;; make sure the isr will not immediately start