led_flash.c

来自「CODE for embedded C ,hand coding version」· C语言 代码 · 共 53 行

/*---------------------------------------------------------------*-
 LED_Flash.C(v1.00)
 Author:06_Digital_Media 
 All Right Reserved
 -----------------------------------------------------------------
 Simple 'Flash LED 'test function 

 -*--------------------------------------------------------------*/
 #include "Main.H"
 #include "Port.H"
 #include "LED_Flash.H"

 //------------Private variable definitions ----------------------
 static bit LED_state_G;
 /*--------------------------------------------------------------*-
   LED_FLASH_Init()
   Prepare for LED_Change_State()function - see below
   -*-----------------------------------------------------------*/

   void LED_FLASH_Init(void){
    LED_state_G = 0 ;
   }

   /*------------------------------------------------------------*-
     LED_FLASH_Change_State()
	 Changes the state of an LED (or pulses  a buzzer ,etc) on a specific
	 port pin

	 Must call at twice the required flash rate:thus ,for 1HZ flash (on for
	 0.5 seconds,off for 0.5 seconds) must call every 0.5 seconds

	 -*-----------------------------------------------------------*/


	 void LED_FLASH_Change_State(void){
	  //Change the LED from OFF to ON (or vice versa)
	  if (LED_state_G == 1){
	   LED_state_G = 0;
	   LED_pin = 0;
	  }
	  else
	  {
	   LED_state_G = 1;
	   LED_pin = 1;
	  }
	 }

	 /*----------------------------------------------------------*-
	 -------END OF FILE-------------------------------------------
	 -*----------------------------------------------------------*/