main.c

单片机源代码

/*
	avr-libc EEPROM 读写测试程序
	main.c
	MCU:atmega8
	
	芯艺 2004-09-11
*/

#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/eeprom.h>
#include <stdio.h>

unsigned char g_aEepDat[] __attribute__((section(".eeprom"))) ;

char g_aString[81];

void IoInit(void);

int main(void)
{
	char c;
	unsigned int i;
	
	IoInit();
	
	printf_P(PSTR("请输入命令，w :写 r: 读\n"));
	
	while(1)
	{
		scanf("%c",&c);
		if(c=='r')
		{
			for(i=0;i<E2END;i++)
			{
				c=eeprom_read_byte(g_aEepDat+i);
				if(c!=0)
					printf("%c",c);
				else
					break;
			}
			printf("\n");
		}
		else if(c=='w')
		{
			printf_P(PSTR("请输入字符串:\n"));
			scanf("%s",g_aString);
			
			//确定输入字符串长度
			for(i=0;i<E2END;i++)
			{
				if(g_aString[i]==0)
					break;
			}
	
			eeprom_write_block(g_aString,g_aEepDat,++i);
			printf_P(PSTR("保存完成!\n"));
		}		
	}
}