Question

pic单片机怎么在MPLAB设定初始EEPROM

实际程序需要接受外部键盘，设定参数到EEPROM，但是想初始想EEPROM有个值，怎么办呢？

Answer 1

用DE伪指令
举例：
ORG 0x2100 ;这是PIC16F628A的EEPROM虚拟地址，当然
;不同的芯片是不同的
DE 0x00, 0x01, 0x02, 0x03 ;初始化EEPROM数据
picc编译器
EEPROM 数据
有些PIC单片机支持用外部编程器对内部的EEPROM进行编程。
__EEPROM_DATA()可以将用于初始化的数据放入HEX文件中，如：
__EEPROM_DATA(0, 1, 2, 3, 4, 5, 6, 7)
可将0-7八个数放入HEX文件中，在用外部的编程器进行编程时将 这八个数写入PIC单片机中。
__EEPROM_DATA不是用于运行时写入EEPROM数据的，在运行时请用 EEPROM_READ(), EEPROM_WRITE()。

追问

EEPROM虚拟地址是什么？我在数据手册中怎么没看到？

追答

这个在数据手册没有，在宏汇编de指令时讲的，0X2100对应eeprom的起始地址，记住就行了

Answer 2

//初始化EEPROM的数据，它们是8个一组合（如果不够8个将它补全8个字节，），
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0xF2,0x7F,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0xF2,0x7F,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
__EEPROM_DATA(0x00,0x00,0x00,0x00,0x4F,0xFE,0x03,0x00);
__EEPROM_DATA(0xDD,0xDD,0x13,0x00,0xE0,0x4C,0x00,0x00);
__EEPROM_DATA(0x68,0x5B,0x00,0x00,0x18,0x60,0x00,0x00);
__EEPROM_DATA(0x55,0x5A,0xBE,0xFF,0x65,0xC8,0x21,0x00);
__EEPROM_DATA(0x03,0x50,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF);
__EEPROM_DATA(0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF);
__EEPROM_DATA(0xFF,0xFF,0xFF,0xFF,0x01,0xFF,0x00,0xFF);
__EEPROM_DATA(0x02,0xFF,0xC5,0xFF,0x06,0xFF,0x01,0xFF);
__EEPROM_DATA(0x0F,0xFF,0x14,0xFF,0xff,0xff,0xff,0xff);

Answer 3

如果你用C语言编程的话，可以用如下的程序：
__EEPROM_DATA(0x1e,0x50,0x01,0x1d,0x01,0xb8,0x18,0xa6);
注意，前面是双下划线。它的意思是从EEPROM的单元0＝7分别用0x1e,0x50,0x01,0x1d,0x01,0xb8,0x18,0xa6填充。如果还有数据，接着写这个语句。
这个可看北航的《PIC16系列单片机C程序设计与PROTEUS仿真》一书的P62。

Answer 4

你是不是想烧写EEPROM的初始值上去？在烧写程序时先选择View-EEPORM.就可以修改烧进去的值了。