Diff: main.cpp

Revision:

0:dc9726268dc6

Child:

1:00a40243c245

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jul 15 08:16:02 2013 +0000
@@ -0,0 +1,91 @@
+/**
+ * This program is test for p9813 IC 
+ **/
+
+
+#include "mbed.h"
+
+//DigitalOut led(LED1);
+BusOut leds(LED1,LED2,LED3,LED4);
+AnalogIn analog(p15);
+
+
+#define H 1
+#define L 0
+
+DigitalOut di(p10);//signal
+DigitalOut ci(p11);//clock
+
+void sendBit(char bit){
+    ci =L;
+    di = (bit==0 ? L:H );
+    ci=H;//read DI at rising edge
+}
+char toGrayCode(char byte){
+    char shift = byte>>1;
+    return shift^byte;
+}
+
+void sendByte(char byte){
+    char mask =0x80;
+    for(  ; mask != 0x00 ; mask>>=1){// 1000 0000
+        sendBit(byte & mask);
+    }
+}
+
+void sendStartFrame(){
+    for(int i = 0; i<4 ;i++){
+        sendByte(0x00);
+    }
+}
+
+void sendStopFrame(){
+    sendStartFrame();
+}
+
+void sendRGB(char rb,char gb ,char bb){
+    printf("******\n");
+    printf("r is %X \n",rb);
+    printf("g is %X \n",gb );
+    printf("b is %X \n",bb );
+    printf("******\n\n");
+    
+    char r = toGrayCode(rb);
+    char g = toGrayCode(gb);
+    char b = toGrayCode(bb);
+    
+    sendStartFrame();
+    sendBit(H);
+    sendBit(H);
+    // error check
+    sendBit( (~b) & 0x80 );//mask by 1000 0000
+    sendBit( (~b) & 0x40 );//mask by 0100 0000
+    sendBit( (~g) & 0x80 );//mask by 1000 0000
+    sendBit( (~g) & 0x40 );//mask by 0100 0000
+    sendBit( (~r) & 0x80 );//mask by 1000 0000
+    sendBit( (~r) & 0x40 );//mask by 0100 0000
+    //send RGB data
+    sendByte(b);
+    sendByte(g);
+    sendByte(r);
+    sendStopFrame();
+}
+
+
+
+int main() {
+    leds =0x0;
+    while(1) {
+        
+        leds=leds+1;
+        sendRGB(0x00,0x00,0xFF);
+        wait(2.0*analog.read());
+        leds=leds+1;
+        sendRGB(0xFF,0x00,0x00);
+        wait(2.0*analog.read());
+        leds=leds+1;
+        sendRGB(0x00,0xFF,0x00);
+        wait(2.0*analog.read());
+        leds=leds+1;
+    }
+}