keyboard.c

来自「基于ＧＳＭ无线温度检测系统」· C语言 代码 · 共 49 行

/*
ICBEAN M16板键盘程序 
 keyboard.c

*/

#include "common.h"
#include "keyboard.h"


void keyboard_Initial(void)
{
	DDR_KEYBoard &=0xC3;   
	PORT_KEYBoard |=0x3C;
}

uchar GetKey(void)
{
    uchar key=0;
	uchar key_press_status;

   	PORT_KEYBoard |=0x3C;//对键盘IO口初始化
	
	delay(5);
    key_press_status =PIN_KEYBoard;
	key_press_status &=0x3C;//将键值提出来
   	
 	if((~key_press_status) & 0x20) 
	{
		key=PLAY_KEYBOARD;
	}                          

 	if((~key_press_status) & 0x10)
 	{
		key=REC_KEYBOARD;
	}
	if((~key_press_status) & 0x08)
	{
		key=SET_KEYBOARD;
	}                          

 	if((~key_press_status) & 0x04)
 	{
		key=STOP_KEYBOARD;
	}

	return key;
}