main.cpp

00001 #include "mbed.h"
00002 //ShiftBrite Demo
00003 DigitalOut latch(p15);
00004 DigitalOut enable(p16);
00005 //Cycles through different colors on RGB LED
00006 SPI spi(p11, p12, p13);
00007 //Use SPI hardware to write color values to LED driver chip
00008 void RGB_LED(int red, int green, int blue) {
00009     unsigned int low_color=0;
00010     unsigned int high_color=0;
00011     high_color=(blue<<4)|((red&0x3C0)>>6);
00012     low_color=(((red&0x3F)<<10)|(green));
00013     spi.write(high_color);
00014     spi.write(low_color);
00015     latch=1;
00016     latch=0;
00017 }
00018 
00019 int main() {
00020     int red=0;
00021     int green=0;
00022     int blue=0;
00023     spi.format(16,0);
00024     spi.frequency(500000);
00025     enable=0;
00026     latch=0;
00027     wait(2);
00028     for (red = 0; red<50; red = red+10) {
00029         for (blue = 0; blue<50; blue = blue+10) {
00030             for (green = 0; green<50; green = green+10)
00031 
00032             {
00033                 RGB_LED( red, green, blue);
00034                 wait(.25);
00035             }
00036         }
00037     }
00038 
00039 }