24cxxmain.c

本程序提供的两个函数适用于 24C01 到 24c512

#include<iom16v.h>
#include<macros.h>
#include"xd.h"
#define XDmain
#include"xdprj.h"


uchar r_buf[64];

uchar w_buf[64];

void main()
{
	uint i;
	
     uchar *r;
     uint b;
     uint c;

     uchar *w;
     uint x;
     uint y;

	tms(100);

	//-----初始化cpu------
    setreg_m16();	//初始化cpu


	for(i=0;i<64;i++)		//清主机读和写缓存区
		r_buf[i]=w_buf[i]=0;

	for(i=0;i<64;i++)		//写缓存区赋初值
		w_buf[i]=i;

     r=r_buf;	//读参数
     b=0x00;
     c=64;

     w=w_buf;	//写参数
     x=0x00;
     y=64;

     wt24c(w,x,y);	//写

     rd24c(r,b,c);	//读
     
     //-----读出的数据发送到PC-----
     for(i=0;i<64;i++)
     	txd_buf[i]=r_buf[i];
     
     txd_buf[69]=syserr;
     
     txdpo(txd_buf, 69);
     
     while(1);
     //----------------------------

	c=0;


}



//-------------------------------------------------------------------------------------------------------------------------
//ICC-AVR application builder : 2005-11-9 22:09:34
// Target : M16
// Crystal: 8.0000Mhz


void port_init(void)
{
 PORTA = 0xFF;
 DDRA  = 0x00;
 PORTB = 0xFF;
 DDRB  = 0x00;
 PORTC = 0xFF; //m103 output only
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0x00;
}

//TWI initialize
// bit rate:100
void twi_init(void)
{
 TWCR= 0X00; //disable twi
 TWBR= 0x64; //set bit rate
 TWSR= 0x00; //set prescale
 TWAR= 0x00; //set slave address
 TWCR= 0x04; //enable twi
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x33; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x08;
}

//call this routine to initialize all peripherals
void setreg_m16(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 twi_init();
 uart0_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}