gpio.c

LED控制

#include <pic.h>
#include "..\inc\include.h"
#include "..\lib\GPIO.h"

volatile uchar	KeyValue;	//
volatile uchar	KeyEvent;	//


static void Delay(uchar t)
{
	uchar i;
	int j;
	i = t;
	while(i--){
		j = 1000;
		while(j--);	
	}			
}

void Port_Init(void)
{
#if	defined(_16F737) || defined(_16F747) || defined(_16F767) || defined(_16F777)
	ADCON1 |= 0x0F;					//pins config as digital IO instead of anolog input pins
#endif
//---Port A---

//---Port B---
	RBPU = 0;						//PORTB Pull-up 
	TRISB |= 0xF0;					//RB4~7 input
	TRISB &= 0xF0;					//RB0~3 output
	TRISB0 = 0;						//LED(RB0) output
	LED = 0;
	
//---Port C---
	TRISC6 = 0;						//RC6/TxD output
//---Port D---
	
}

void KeyScan(void)
{
	Delay(20);						//延时消抖
	if((!KEY_DEC) || (!KEY_INC) || (!KEY_POWER)){				//按下按键
		//LED2 = !LED2;
		LED = OFF;					//按键时LED闪烁一下（开始）
		KeyValue = (uchar)((!KEY_DEC<<2) | (!KEY_INC<<1) | (!KEY_POWER<<0));
		KeyEvent = KEY_PRESSED;
	} 
	else if(KeyValue & 0x07) {									//松开按键
		//LED3 = !LED3;
		KeyValue = KeyValue;		//按键值不变，留待处理
		KeyEvent = KEY_RELEASED;
	} else {													//误触发
		KeyValue = 0;
		KeyEvent = KEY_IDLE;
	}
	PORTB = PORTB;
	RBIF = 0;	
}