Jens Strümper / LedBlink

LedBlink library makes it possible to change blink frequency of a given LED by calling the Blink function with a float parameter elsewhere in the code to visualise state changes in a program.

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Show/hide line numbers LedBlink.cpp Source File

LedBlink.cpp

00001 #include "mbed.h"
00002 #include "LedBlink.h"
00003 Ticker LedTicker; 
00004 volatile float led_timer = 0;
00005 bool ChangeStatusFlag = false;
00006 
00007 LedBlink::LedBlink(PinName pin) :_pin(pin) {
00008     _pin = 1;
00009     }
00010     
00011 void LedBlink::LedBlinkCallback(void) {
00012     if (led_timer == 0){
00013         _pin = 1;
00014         }
00015     if (led_timer != 0){ 
00016         _pin = !_pin;
00017         if (ChangeStatusFlag) {
00018             // re-task ticker flash rate
00019             LedTicker.detach(); 
00020             LedTicker.attach(this, &LedBlink::LedBlinkCallback,led_timer); 
00021             ChangeStatusFlag = false;
00022         }
00023     }   
00024 } 
00025 
00026 void LedBlink::Blinker(float frequency){
00027     led_timer = frequency;
00028     ChangeStatusFlag = true;
00029     LedBlinkCallback();
00030 }
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