通俗简单加好用的74HC595驱动代码

一.头文件定义

?以下编写了两种管脚名和对应说明

#define HC595_NUM (5)

#define OE_H    OE = 1
#define OE_L    OE = 0

#define STCP_H  STCP = 1
#define STCP_L  STCP = 0

#define SHCP_H  SHCP = 1
#define SHCP_L  SHCP = 0

//sbit HC595Rclk =P1^3;  //RCLK
//sbit HC595Clk =P1^4;   //SRCLK
//sbit HC595In =P1^2;    //SER

sbit OE = P3^3;
sbit DS = P3^2;    //串行数据输入       对应SER        
sbit STCP = P3^4;  //锁存寄存器时钟输入 对应RCLK
sbit SHCP = P3^5;  //移位寄存器时钟输入 对应SRCLK


void Hc595_Write_data(unsigned char Data[HC595_NUM]);

二.C文件定义

/*移位寄存器的上升沿*/
static void Shift_rising_edge(void){
      SHCP_L, SHCP_H;             //上升沿传输数据到寄存器
}
/*锁存寄存器上升沿*/
static void LOCK_rising_edge(void){
      STCP_L, STCP_H;             //上升沿传输数据到寄存器
}


static void Wirte_byte(unsigned char Data, void(*SRE)(void)){
  unsigned char i=0;
    for(i=0;i<8;i++){    
      DS =(Data<<i)&0x80 ? 1:0;  
      SRE();
    }
}

void Hc595_Write_data(unsigned char Data[HC595_NUM]){
  unsigned char j;
  for(j=0;j<HC595_NUM;j++){ 
    Wirte_byte(Data[j],Shift_rising_edge);
  }
  LOCK_rising_edge();
}

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