Diff: main.cpp

Revision:

0:b44cdf7cb6a5

Child:

1:ab859ed60719

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Feb 13 19:22:58 2015 +0000
@@ -0,0 +1,96 @@
+#include "mbed.h"
+#include <map>
+
+//Initialize serial comms
+Serial pc(USBTX, USBRX);
+
+PwmOut PWM1(p21);
+
+DigitalOut row1(p25);
+DigitalOut row2(p22);
+DigitalOut row3(p23);
+DigitalOut row4(p24);
+
+DigitalIn col1(p20);
+DigitalIn col2(p19);
+DigitalIn col3(p18);
+DigitalIn col4(p17);
+Timer t1;
+
+//map
+map<int, char> keypadMap;
+
+//Mores Code -> Character Map
+void init(){
+        keypadMap[0x11]='1';
+        keypadMap[0x12]='2';
+        keypadMap[0x14]='3';
+        keypadMap[0x18]='A';
+        keypadMap[0x21]='4';
+        keypadMap[0x22]='5';
+        keypadMap[0x24]='6';
+        keypadMap[0x28]='B';
+        keypadMap[0x41]='7';
+        keypadMap[0x42]='8';
+        keypadMap[0x44]='9';
+        keypadMap[0x48]='C';
+        keypadMap[0x81]='*';
+        keypadMap[0x82]='0';
+        keypadMap[0x84]='#';
+        keypadMap[0x88]='D';
+}
+
+int main() {
+    init();
+    //Initialize rows to 0
+    row1 = 0;
+    row2 = 0;
+    row3 = 0;
+    row4 = 0;
+    t1.start();
+    int input = 0x00;
+    while(1) {
+       //Keep each led lit for 4ms
+       switch(t1.read_ms()%4){
+                        case 0:
+                        row1 = 1;
+                        input |= 0x10;
+                        row4 = 0;
+                        break;
+                        case 1:
+                        row2 = 1;
+                        input |= 0x20;
+                        row1 = 0;
+                        break;
+                        case 2:
+                        row3 = 1;
+                        input |= 0x40;
+                        row2 = 0;
+                        break;
+                        case 3:
+                        row4 = 1; 
+                        input |= 0x80;
+                        row3 = 0;
+                        break; 
+                        }
+     if(col1 == 1)
+     input |= 0x01;
+     else if(col2 == 1)
+     input |= 0x02;
+     else if(col3 == 1)
+     input |= 0x04;
+     else if(col4 == 1)
+     input |= 0x08;
+     
+     char c = keypadMap[input]; //assign charcter based on input
+     
+     if(c != 0){
+     pc.printf("%c\r",c);  //print input and char
+     }
+    
+     
+     input = 0x00;
+     
+       
+    }
+}