f_8_19a_ledtoggle_a.c

来自「* Use 10 MHz crystal frequency. * Use 」· C语言 代码 · 共 28 行

#include "config.h"
#include "delay.h"

// this code illustrates a WRONG way to toggle
// an LED on or off after a switch press and release.
// LED will actually be ON while switch is
// held down, and OFF when switch the is released.
// Does NOT toggle on press and release.
// Also, no switch debouncing delay is included.
 
void main(void)
{

  TRISB = 0xEF;		// set RB4 as output  
  RB4 = 0;		// turn RB4 off
  while(1) { 
    if (!RB6) {
      // switch pressed, turn on LED
      RB4 = 1;
    }
    if (RB6) {
      // switch pressed, turn off LED
      RB4 = 0;
    }
  }
}