e2p.c

51开发板的源程序

//包含文件如下

#include "c51base.h" 



/******************************************
EEPROM定义
******************************************/
bdata unsigned char b_P0 _at_ 0x30;//sfr at 0x80
bdata unsigned char b_P1 _at_ 0X32;//sfr at 0x90
bdata unsigned char b_P2 _at_ 0x34;//sfr at 0xa0
bdata unsigned char b_P3 _at_ 0x36;//sfr at 0xb0

sbit EPM_SDA = b_P1^4;
sbit EPM_SCL = b_P1^5;
sbit EPM_WP  = b_P1^3;

//bit EMP_WP;
bit enable_task_switch;
extern bit epm_err;
extern bit is_reading;
extern bit is_writing;
char movx_a_dptr();
void SendStopCondition();
/*************EEPROM初始化****************/

void InitEPROM()
{
	is_reading = is_writing = 0;
	DPH = 0X80;
	DPL = 0X00;
	epm_err = 0;
	movx_a_dptr();
	SendStopCondition();
}