Diff: main.cpp

Revision:

0:332a7dedda99

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Feb 10 15:32:38 2021 +0000
@@ -0,0 +1,52 @@
+#include "mbed.h"
+
+BusOut LED_Disp(p7,p11,p9,p8,p5,p6,p10,p12);
+
+DigitalOut test(LED1);
+
+DigitalOut col1 (p26);       // pin 4 on keypad
+DigitalOut col2 (p28);       // pin 2
+DigitalOut col3 (p24);       // pin 6 
+
+DigitalIn row1 (p27);        // pin 3
+DigitalIn row2 (p22);        // pin 8
+DigitalIn row3 (p23);        // pin 7
+DigitalIn row4 (p25);        // pin 5
+
+char keypad(void) 
+{
+    col1 = 1;             //test keys presson on col1
+    col2 = 0; 
+    col3 = 0; 
+    
+    if (row1==1)
+    {
+        while(row1==1){}
+        
+        col1 = 0;              // pull all back to 0
+        col2 = 0;
+        col3 = 0;
+        return('1');            // return char 1
+    }
+    else if (row2==1)           // row2 = 1
+    {
+        while (row2==1){}
+        
+        col1 = 0;
+        col2 = 0;
+        col3 = 0;
+        return('4');           // return 4
+    } 
+    else  if (row3==1)         // row3 = 1
+    {
+        while (row3==1){}
+        
+        col1 = 0;
+        col2 = 0;
+        col3 = 0;
+        return('7');   
+    } 
+        
+        
+        
+            
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