EEPW论坛

 
//控制管脚的宏定义
#define Ctrl_Out  P3DIR |= BIT1 + BIT2 + BIT3;
#define Ctrl_0    P3OUT &= ~(BIT1 + BIT2 + BIT3)
#define SRCLK_1   P3OUT |= BIT1
#define SRCLK_0   P3OUT &= ~BIT1
#define SER_1     P3OUT |= BIT2
#define SER_0     P3OUT &= ~BIT2
#define RCLK_1    P3OUT |= BIT3
#define RCLK_0    P3OUT &= ~BIT3

void HC595_output_Byte(unsigned char HC595_data)
{
    unsigned char i;
    
    Ctrl_Out;
    Ctrl_0;
    
    for(i = 0; i < 8; i++)
    {
        SRCLK_0;
        if(HC595_data & 0x80)  SER_1;
        else            SER_0;
        SRCLK_1;
        HC595_data <<= 1;
    }
    RCLK_1;
    for(i = 10; i > 0; i--) ;//延迟一点时间
    RCLK_0;
}