Diff: main.cpp

Revision:

0:0bf629429936

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 14 04:59:29 2013 +0000
@@ -0,0 +1,79 @@
+// WS2803_Testing_MBED
+// By Thomas Olson
+// teo20130210.01
+// MBED LPC1768
+// WS2803 pin4 CKI -> ws2803_clockPin(p21)
+// WS2803 pin5 SDI -> ws2803_dataPin(p22)
+
+
+#include "mbed.h"
+
+DigitalOut ws2803_clockPin(p21);
+DigitalOut ws2803_dataPin(p22);
+
+#define nLEDs 18
+#define nBARs 2         // Number of WS2803 chained together
+
+uint8_t ledBar[nBARs][nLEDs];
+
+void shiftOut(uint8_t sodata) {
+    for(int i = 7; i >= 0; i--) {
+        ws2803_clockPin = 0;
+        if(sodata & (0x01 << i)){
+            ws2803_dataPin = 1;
+        } else {
+            ws2803_dataPin = 0;
+        }
+        wait_us(1);
+        ws2803_clockPin = 1;
+        wait_us(1);
+        ws2803_clockPin = 0;
+    }
+}
+
+void loadWS2803(){
+  for(int wsBar = 0; wsBar < nBARs; wsBar++){
+    for (int wsOut = 0; wsOut < nLEDs; wsOut++){
+      shiftOut(ledBar[nBARs-(wsBar+1)][wsOut]);
+    }
+  }
+  ws2803_clockPin = 0;
+  wait_us(600); // 500us-600us needed to reset WS2803s
+}
+
+void clearWS2803(){
+        for(int wsOut = 0; wsOut < nLEDs; wsOut++){
+                ledBar[0][wsOut] = ledBar[1][wsOut] = 0x00;
+                loadWS2803();
+        }
+}
+
+int main() {
+    // initialize WS2803s
+    ws2803_clockPin = 0;
+    wait_us(600);
+   
+    while(1) {
+        clearWS2803();
+        wait(2.0);
+        // Chase mode
+        for(int iOut=7; iOut < 256; iOut*=2){
+            for(int wsOut = 0; wsOut < nLEDs; wsOut++){
+                ledBar[0][wsOut] = ledBar[1][wsOut] = (uint8_t)(0xFF & iOut);
+                loadWS2803();
+                clearWS2803();
+            }
+        }
+
+        wait(2.0);    
+        //parallel mode
+        for(int iOut = 7; iOut < 64; iOut*=4){
+                for(int wsOut = 0; wsOut < nLEDs; wsOut++){
+                        ledBar[0][wsOut] = ledBar[1][wsOut] = (uint8_t)(0xFF & iOut);
+                        loadWS2803();
+                        wait_us(1000000);
+                }
+                wait_us(10000);
+        }
+    }// while(1)
+}