Derek Calland / Mbed 2 deprecated Cathode_SevenSegDisplay

Hex Values when using a Common Cathode arrangement for the LED's

Dependencies:   mbed

main.cpp@0:c973368c963d, 2013-03-13 (annotated)

Committer:
Degs
Date:
Wed Mar 13 21:01:58 2013 +0000
Revision:
0:c973368c963d
For Newbies to compare Hex values for LED's

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Degs 0:c973368c963d 1 /*Program Example 3.5: Simple demonstration of 7-segment display. Display digits 0 to 9 in turn.
Degs 0:c973368c963d 2 */
Degs 0:c973368c963d 3 #include "mbed.h"
Degs 0:c973368c963d 4 BusOut display_units(p5,p6,p7,p8,p9,p10,p11,p12); // segments a,b,c,d,e,f,g,DP
Degs 0:c973368c963d 5 BusOut display_tens(p21,p22,p23,p24,p25,p26,p27,p28);
Degs 0:c973368c963d 6 DigitalOut Seconds_Ticker(p30);
Degs 0:c973368c963d 7
Degs 0:c973368c963d 8 char SegConvert( char SegValue);
Degs 0:c973368c963d 9
Degs 0:c973368c963d 10 int main()
Degs 0:c973368c963d 11 {
Degs 0:c973368c963d 12 while(1) {
Degs 0:c973368c963d 13 for(char j=0; j<10; j++) {
Degs 0:c973368c963d 14 display_tens = SegConvert(j);
Degs 0:c973368c963d 15 for(char i=0; i<10; i++) {
Degs 0:c973368c963d 16 display_units = SegConvert(i);
Degs 0:c973368c963d 17 for(int s=0;s<60; s++) {
Degs 0:c973368c963d 18 Seconds_Ticker = 1;
Degs 0:c973368c963d 19 wait(0.5);
Degs 0:c973368c963d 20 Seconds_Ticker = 0;
Degs 0:c973368c963d 21 wait(0.5);}
Degs 0:c973368c963d 22 }
Degs 0:c973368c963d 23 }
Degs 0:c973368c963d 24 }
Degs 0:c973368c963d 25 }
Degs 0:c973368c963d 26
Degs 0:c973368c963d 27 char SegConvert(char SegValue)
Degs 0:c973368c963d 28 {
Degs 0:c973368c963d 29 char SegByte=0x00;
Degs 0:c973368c963d 30 switch (SegValue) {
Degs 0:c973368c963d 31 //DP G F E D C B A
Degs 0:c973368c963d 32 case 0: SegByte = 0x3F; break; //0 0 1 1 1 1 1 1 binary
Degs 0:c973368c963d 33 //display 0
Degs 0:c973368c963d 34 case 1: SegByte = 0x86; break; //1 0 0 0 0 1 1 0
Degs 0:c973368c963d 35 //display 1 + DP
Degs 0:c973368c963d 36 case 2: SegByte = 0x5B; break;
Degs 0:c973368c963d 37 case 3: SegByte = 0x4F; break;
Degs 0:c973368c963d 38 case 4: SegByte = 0x66; break;
Degs 0:c973368c963d 39 case 5: SegByte = 0x6D; break;
Degs 0:c973368c963d 40 case 6: SegByte = 0x7D; break;
Degs 0:c973368c963d 41 case 7: SegByte = 0x07; break;
Degs 0:c973368c963d 42 case 8: SegByte = 0x7F; break;
Degs 0:c973368c963d 43 case 9: SegByte = 0x6F; break;
Degs 0:c973368c963d 44 } //end of switch
Degs 0:c973368c963d 45 return SegByte;
Degs 0:c973368c963d 46 }