Kazuhiro Ouchi
DFROBOT 3-Wire LED Module sample program.
秋月電子で販売されているDFROBOT社の3-Wire LED モジュールをLPC1114FN28に接続してみました。 そのサンプルプログラムになります。
LEDモジュールとの接続方法は以下の通り。
DATA (DS) - dp9
LATCH (STCP) - dp10
CLOCK (SHCP) - dp11
Vcc - +5V
GND - GND
Revision 0:5e8377638086, committed 2013-10-06
- Comitter:
- kanpapa
- Date:
- Sun Oct 06 06:43:48 2013 +0000
- Commit message:
- 1st release
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 Sun Oct 06 06:43:48 2013 +0000
@@ -0,0 +1,49 @@
+#include "mbed.h"
+
+//Pin connected to Data in (DS) of 74HC595
+DigitalOut dataPin(dp9);
+//Pin connected to latch pin (ST_CP) of 74HC595
+DigitalOut latchPin(dp10);
+//Pin connected to clock pin (SH_CP) of 74HC595
+DigitalOut clockPin(dp11);
+
+uint8_t Tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
+
+void shiftOut(DigitalOut data, DigitalOut clk, int sdata) {
+ for (int i = 7; i >= 0; i--) {
+ clk = 0;
+ if(sdata & (1 << i)){
+ data = 1;
+ } else {
+ data = 0;
+ }
+ clk = 1;
+ data = 0;
+ }
+}
+
+void leddisp(long n){
+ char disp[9];
+
+ sprintf(disp, "%08d¥n", n);
+
+ for (int c = 8; c >= 0 ;c--){
+ // write to the shift register with the correct bit set high:
+ latchPin = 0;
+ // shift the bits out:
+ shiftOut(dataPin, clockPin, Tab[disp[c] - 48]);
+ // turn on the output so the LEDs can light up:
+ latchPin = 1;
+ }
+}
+
+int main() {
+ long number = 0;
+ while(1) {
+ leddisp(number++);
+ if (number > 99999999) {
+ number = 0;
+ }
+ wait(0.1);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sun Oct 06 06:43:48 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f \ No newline at end of file