key.c

A7102-433.rar

#include    "../header/key.h"
/***********************************************
函 数:	KeyScan
功 能:	按键扫描 
输 入:	/  
输 出:	/
描 述:	/
***********************************************/
void    KeyScan(void)
{
    uchar   temp0,temp1;

    temp0    = P2&0xf0;
    if(temp0!=0xf0)
    {
        Delay(5);
        temp1   = P2&0xf0;
        if((temp0 == temp1)&&(!flag_always))
        {
            flag_always = true;                                     /* 已经有键按下，在本次释放前不再扫描 */
            switch(temp0)
            {
                case 0xe0:      /* 设置键 */

                     flag_master = ~flag_master;
                     flag_clear  = false;                     
                     
                     LcdDclear();
                     if(flag_master)
                     {
                         number         = 0x00;
                         Time_second    = 1000;

                         WriteLcdCmd(0x80);			            /* 设置DDRAM地址第一行 */
                         Delay(3);
                         Lcd_Display_Character(0x54);
                         Lcd_Display_Character(0x78);
                         Lcd_Display_Character(0x3a);
                         Lcd_Display_Character(0x20);                       /* Tx:  */

                         WriteLcdCmd(0xc0);			            /* 设置DDRAM地址第二行 */
                         Delay(3);
                         Lcd_Display_Character(0x52);
                         Lcd_Display_Character(0x78);
                         Lcd_Display_Character(0x3a);
                         Lcd_Display_Character(0x20);                       /* Rx:  */
                     }
                     else
                     {
                         Time_second    = 0x0000;
                         flag_transimiter    = false;

                         WriteLcdCmd(0xc0);			           /* 设置DDRAM地址第二行 */
                         Delay(3);
                         Lcd_Display_Character(0x52);
                         Lcd_Display_Character(0x78);
                         Lcd_Display_Character(0x3a);
                         Lcd_Display_Character(0x20);                       /* Rx:  */
                     }
                     break;
                case 0xd0:      /* +键 */

                     break;
                case 0xb0:

                     break;
                case 0x70:
                     
                     break;

                default:
                    break;
            }
        }
    }
    else
    {
        flag_always     = false;                 // 按键释放
    }
}