智能防溜.c

sca3000加速度传感器c语言程序

//********************
//FILE: 智能防溜.c
//********************
#include <iom128v.h>
#include <macros.h>
#include<eeprom.h>
#define SIZE 100
unsigned char SPI_rx_buff[SIZE];
unsigned char SPI_tx_buff[SIZE];
unsigned char rx_wr_index,rx_rd_index,rx_counter,rx_buffer_overflow;
unsigned char tx_wr_index,tx_rd_index,tx_counter;
unsigned char aix;
unsigned char x_aix;
unsigned char y_aix;
unsigned char z_aix;
unsigned char address;
//秙ca3000加速度值//
unsigned char sca3000_aix(unsigned char address)
{
   aix=0;
   //address=address<<2;
   PORTB=PORTB&(~0x04);
   SPDR=address;
   while(!(SPCR&(1<<SPIF)))
   ;
   SPDR=0x00;
   while(!(SPCR&(1<<SPIF)))
  ;
   aix=SPDR;
  // aix=x_aix<<8;
   //SPDR=0x00;
   //while(!(SPCR&(1<<SPIF)))
   //;
   //aix|=SPDR;
   PORTB=PORTB|0x04;
   return aix;
   }

#pragma interrupt_handler spi_stc_isr:18
void spi_stc_isr(void)
{
   SPI_rx_buff[rx_wr_index]=SPDR;
   if(++rx_wr_index==SIZE);
    rx_wr_index=0;
   if(++rx_counter==SIZE)
   {
     rx_counter=0;
	 rx_buffer_overflow=1;
   }  
   if(rx_counter)
   {
      --tx_counter;
	  SPDR=SPI_tx_buff[tx_rd_index];
	  if(++tx_rd_index==SIZE)
	     tx_rd_index=0;
   }
   }
 
 
unsigned char getSPIchar(void)
{
    unsigned char data;
	while(rx_counter==0);
	data=SPI_rx_buff[rx_rd_index];
	if(++rx_rd_index==SIZE)
	   rx_rd_index=0;
	CLI();
	--rx_counter;
	SEI();
	return data;
	 
}

void putSPIchar(char c)
{
    while(tx_counter==SIZE);
	CLI();
	if(tx_counter||((SPSR&0x80)==0))
	  { 
	  SPI_tx_buff[tx_wr_index]=c;
	  if(++tx_wr_index==SIZE)
	    tx_wr_index=0;
		++tx_counter;
	  }
	 else
	    SPDR=c;
		SEI();
}

void spi_init(void)
{
    unsigned char temp;
	DDRB|=0x80;
	PORTB|=0x80;
	SPCR=0xD5;
	
    SPSR=0x00;
	temp=SPSR;
	temp=SPDR;
}

void main(void)
{
    unsigned char i;
	CLI();
	spi_init();
	SEI();
	address=0x0F;    //读x轴加速度值，0x05为x轴加速度高位地址//
	sca3000_aix(address);
	x_aix=aix;
	while(0==0)
	{
	  putSPIchar(i);
	  i++;
	  getSPIchar();
	}
}