readswitch._c

电梯楼层采集器代码

#include"include.h"

#define CLK    7
#define SH_LD  5


#define SER_SL_HI()      DDRB |= (1<<SH_LD)
#define SER_SL_LO()      DDRB &= ~(1<<SH_LD)	 //SH/LD 接PB5

#define SER_CK_HI()      DDRB |= (1<<CLK)
#define SER_CK_LO()      DDRB &= ~(1<<CLK)   //SCK 接 PB7

#define CLK_EN_HI()	  	 DDRB |= (1<<4) 
#define CLK_EN_LO()   	 DDRB &= (1<<4)

#define HC165Switch_Port()  (PINB&(1<<6))   //输入 QH 接PB6

//------------------------------------------------------------------------------
//读AVR控制器地址码和扩展口的按键
void ReadHC165Switch(void)
{
  static unsigned char *Read_buffer;
  struct ReadHC165Switch *Readwitch;
  unsigned char i,j,ret = 0xff;
  Read_buffer = Read74HC165Switch;
  CLK_EN_LO();
 //数据锁存,在shift/load输入一脉冲  
  SER_CK_LO();
  SER_SL_HI();
  asm("nop");
  SER_SL_LO();
  asm("nop");
  SER_SL_HI();
  asm("nop");
  asm("nop");
 //读数据
 for(i=0;i<sizeof(struct ReadHC165Switch);i++)
 {
  	 for(j=0;j<8;j++)
	 {
	    SER_CK_HI();
	  	if(HC165Switch_Port()==0)
		{
		  ret <<= 1;
		  ret &= ~0x01;
		}
		else
		{
		  ret <<= 1;
		  ret |= 0x01;
		}
		asm("nop");
		asm("nop");
		SER_CK_LO();
		asm("nop");
		asm("nop");	 
	 }
	 *Read_buffer++ = ret;
  }
  Readwitch = (struct ReadHC165Switch *)Read74HC165Switch;
}
//------------------------------------------------------------------------------
//扫描按键  PA,PC端口
void  ReadSwitch(void)
{ 
    unsigned char i; 
    ReadSwitchPINA = 0; 
	ReadSwitchPINC = 0;
    for(i=0; i<40; i++); 
	if(!(PINA & 0x80))  ReadSwitchPINA |= 0x80; 
	if(!(PINA & 0x40))  ReadSwitchPINA |= 0x40; 
    if(!(PINA & 0x20))  ReadSwitchPINA |= 0x20; 
    if(!(PINA & 0x10))  ReadSwitchPINA |= 0x10; 
    if(!(PINA & 0x08))  ReadSwitchPINA |= 0x08; 
    if(!(PINA & 0x04))  ReadSwitchPINA |= 0x04; 
    if(!(PINA & 0x02))  ReadSwitchPINA |= 0x02; 
    if(!(PINA & 0x01))  ReadSwitchPINA |= 0x01; 
    for(i=0; i<40; i++); 
	if(!(PINC & 0x80))  ReadSwitchPINC |= 0x80; 
	if(!(PINC & 0x40))  ReadSwitchPINC |= 0x40; 
    if(!(PINC & 0x20))  ReadSwitchPINC |= 0x20; 
    if(!(PINC & 0x10))  ReadSwitchPINC |= 0x10; 
    if(!(PINC & 0x08))  ReadSwitchPINC |= 0x08; 
    if(!(PINC & 0x04))  ReadSwitchPINC |= 0x04; 
    if(!(PINC & 0x02))  ReadSwitchPINC |= 0x02; 
    if(!(PINC & 0x01))  ReadSwitchPINC |= 0x01; 
	
} 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void communication_ReadSwitch(void)
{



}