Tom Fleet
A quick example of how to use a 7 Segment CA display with a 74HC164 Shift Register.
Revision 0:9c559759e6dc, committed 2013-02-22
- Comitter:
- tomfleet
- Date:
- Fri Feb 22 13:57:49 2013 +0000
- Commit message:
- Version 1, Working as expected.
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Feb 22 13:57:49 2013 +0000
@@ -0,0 +1,31 @@
+// Name: ShiftReg_7seg
+// Description: An example of how to print characters to a common anode 7-segment display.
+
+#include "mbed.h"
+#define dpMask 0x80 //bitiwse OR with data to enable decimal point
+SPI shiftReg (p5, p6, p7);
+DigitalOut MR (p8);
+DigitalOut myled(LED1);
+char charTable[16] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x83, 0xF8, 0x80, 0x98, 0x88, 0x83, 0xC6, 0xA1, 0x86 ,0x8E};//0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
+
+void setup()
+ {
+ MR = 0;
+ wait(0.1);
+ MR = 1;
+ shiftReg.write(0x00);
+ wait(1);
+ shiftReg.write(0xFF);
+ wait(1);
+ }
+
+int main() {
+ setup();
+ while(1) {
+ for (int i = 0; i < sizeof(charTable); i++)
+ {
+ shiftReg.write(charTable[i]);
+ wait(0.2);
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Feb 22 13:57:49 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/3d0ef94e36ec \ No newline at end of file