Diff: main.cpp

Revision:

0:5e8377638086

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Oct 06 06:43:48 2013 +0000
@@ -0,0 +1,49 @@
+#include "mbed.h"
+
+//Pin connected to Data in (DS) of 74HC595
+DigitalOut dataPin(dp9);
+//Pin connected to latch pin (ST_CP) of 74HC595
+DigitalOut latchPin(dp10);
+//Pin connected to clock pin (SH_CP) of 74HC595
+DigitalOut clockPin(dp11);
+
+uint8_t Tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
+
+void shiftOut(DigitalOut data, DigitalOut clk, int sdata) {
+    for (int i = 7; i >= 0; i--) {
+        clk = 0;
+        if(sdata & (1 << i)){
+            data = 1;
+        } else {
+            data = 0;
+        }
+        clk = 1;
+        data = 0;
+    }
+}
+
+void leddisp(long n){
+    char disp[9];
+    
+    sprintf(disp, "%08d¥n", n);
+    
+    for (int c = 8; c >= 0 ;c--){
+        // write to the shift register with the correct bit set high:
+        latchPin = 0;
+        // shift the bits out:
+        shiftOut(dataPin, clockPin, Tab[disp[c] - 48]);
+        // turn on the output so the LEDs can light up:
+        latchPin = 1;
+    }
+}
+
+int main() {
+    long number = 0;
+    while(1) {
+        leddisp(number++);
+        if (number > 99999999) {
+            number = 0;
+        }
+        wait(0.1);
+    }
+}