Diff: main.cpp

Revision:

0:8cf7ed60c892

Child:

1:65d57cc8cb22

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 06 08:49:30 2017 +0000
@@ -0,0 +1,56 @@
+#include "mbed.h"
+Serial pc(USBTX, USBRX);
+BusOut Seg1(PC_9,PC_8,PB_8,PC_6,PB_9,PC_5,PA_5,PA_12);// A,B,C,D,E,F,G,DP
+BusOut Seg2(PA_8,PB_1,PB_10,PB_15,PB_4,PB_14,PB_5,PB_13);// A,B,C,D,E,F,G,DP
+char SegConvert(char SegValue); // functionprototype
+
+void SegInit(void); // function prototype
+void HostInit(void); // function prototype
+char GetKeyInput(void); // function prototype
+char data1, data2; // variable declarations
+
+int main() 
+{ // main program
+    SegInit(); // call function to initialise the 7-seg displays
+    HostInit(); // call function to initialise the host terminal
+        while (1) 
+        { // infinite loop
+            data2 = GetKeyInput(); // call function to get 1st key press
+            Seg2=SegConvert(data2); // call function to convert and output
+            data1 = GetKeyInput(); // call function to get 2nd key press
+            Seg1=SegConvert(data1); // call function to convert and output
+            pc.printf(" "); // display spaces between 2 digit numbers
+        }
+}
+
+char SegConvert(char SegValue) { // function 'SegConvert'
+char SegByte=0x00;
+switch (SegValue) { //DPGFEDCBA
+case 0 : SegByte = 0x3F;break; // 00111111 binary
+case 1 : SegByte = 0x06;break; // 00000110 binary
+case 2 : SegByte = 0x5B;break; // 01011011 binary
+case 3 : SegByte = 0x4F;break; // 01001111 binary
+case 4 : SegByte = 0x66;break; // 01100110 binary
+case 5 : SegByte = 0x6D;break; // 01101101 binary
+case 6 : SegByte = 0x7D;break; // 01111101 binary
+case 7 : SegByte = 0x07;break; // 00000111 binary
+case 8 : SegByte = 0x7F;break; // 01111111 binary
+case 9 : SegByte = 0x6F;break; // 01101111 binary
+   }
+    return SegByte;
+}
+
+void SegInit(void) {
+Seg1=SegConvert(0); // initialise to zero
+Seg2=SegConvert(0); // initialise to zero
+}
+
+void HostInit(void) {
+pc.printf("\n\rType two digit numbers to be displayed on the 7-seg display\n\r");
+}
+
+char GetKeyInput(void) {
+char c = pc.getc(); // get keyboard data (note numerical ascii range 0x30-0x39)
+pc.printf("%c",c); // print ascii value to host PC terminal
+return (c&0x0F); // return value as non-ascii (bitmask c with value 0x0F)
+}
\ No newline at end of file