C 语言置位写法

#include "SN8F5701.H"

/******************************************************************************\
 *
 *  @brief main PZ-PA026 Project
 *
 *  @note  none
 *
 *  @author LuoPeng
 *
 *
\******************************************************************************/

sbit k1 = P0 ^ 4;

#define LED1 P05

bit f_k1;

uint8_t num = 0;

void KEY_prs(void);
void delay(uint8_t x);
void Led_off(void);

void delay(uint8_t x)
{
    uint8_t a, b;
    for (a = x; a > 0; a--)
        for (b = 110; b > 0; b--)
            ;
}

void key(void)
{
    if (f_k1)
    {
        if (k1 == 0)
        {
            delay(10);
            if (k1 == 0)
            {
                f_k1 = 0;

                LED1 = ~LED1;
            }
        }
    }
    else if (k1)
        f_k1 = 1;
}

void mcu_config(void)
{
    uint16_t delay_timer = 50000;
    uint8_t delay_timer1 = 0;

    //    CLR_WDT();
    IEN0 = 0x00;

    /** !<  CLKSEL Register (0xE5) CLKSEL[2:0] : 110: fcpu = fosc  / 2 !> */

    CLKSEL = 0x06; // fcpu = 32M / 2	= 16M
    CLKCMD = 0X69;

    /** !<  CKCON Register 6..4  PWSC[2:0] : 001: 1 cycle !> */
    CKCON = 0X10; // ROM 2 cycles   16M

    /** !<  TIMER information !> */
    TH0 = 0xFF;
    TL0 = 0xFF;
    TH1 = 0xFF;
    TL1 = 0xFF;

    /** !<  T0/T1 mode1, clock source from Fcpu/12, 1.33uS  !>   */
    //	TMOD |= T0Mode1 | T0ClkFcpu;

    /** !<  Timer 0/1 enable. Clear TF0/TF1  !> */
    TCON |= 0x10;

    /** !<  Enable T0 interrupt   !> */
    IEN0 |= 0x02;
    /** !<  Enable total interrupt >!*/
    IEN0 |= 0x80;

    /** !<  Enable total interrupt >!*/
    IEN0 |= 0x80;

    P0M |= (1 << 4 | 1 << 1 | 1 << 2 | 1 << 3 | 1 << 5 | 1 << 0);

    P0M &= ~(1 << 4); // P04 ÊäÈëģʽ
    P0UR |= (1 << 4); //ʹÄÜP04ÉÏÀ­
}

void main(void)
{

    f_k1 = 1;

    mcu_config();
    delay(200);

    while (1)
    {
        key();
        delay(500);
        f_k1 = 1;
        delay(500);
        f_k1 = 0;
        //	delay(200);	delay(200);	LED1=~LED1;

        //		CLR_WDT();
        //		if(f_time_10ms)
        //		{
        //			f_time_10ms =0;
        //		}
    }
}