PIC18F25K22 EEPROM操作的问题

只看该作者 · 2012-2-27 12:53

根据安装目录下的demo,

void write(void)          // write a byte of data to EEPROM
{
GIE=0;                   // disable interrupts
WREN=1;             // enable writes
EECON2=0x55;    // required sequence for EEPROM update
EECON2=0xAA;
WR=1;
while(WR)continue;
EEIF=0;
WREN=0;
GIE=1;  // re-enable interrupts
}

自己做了个测试函数：
Init_eeprom(void)
{
EECON1 &= ~0xc0; //选择操作eeprom数据存储区
}

//
void Test_ee(void)
{
char data = 0;

EEADR = 0x00;
EEDATA=0x20;
write();

//data=read();
//Disp_char(data);
}

发现eeprom的数据没有写进去，0XFF.
没发现那里不妥，请知情者指教啊

1万 · 2012-2-27 13:01

你怎么看的？
IDE里的EEPROM吗，那个可能没更新过来！！

只看该作者 · 2012-2-27 13:29

是IDE里的EEPROM。
同步有读函数，显示结果。

2万 · 2012-2-27 14:19

呵呵，乱搞的EEPROM读写函数当然别指望有好结果。给你一个参考的读写函数：
//-----------------------------------------------------------------------------
//filename: eeprom.c
//Version:  v1.0
//Designer: yezhen
//StartTime:2007.2.7
//EndTime:
//History:
//-----------------------------------------------------------------------------
#include          "eeprom.h"
//-----------------------------------------------------------------------------
//Location  to  eeprom_address(0x00)
__EEPROM_DATA( 10,  0, 20, 20,  3,  0,-50, 50);
__EEPROM_DATA(  0,  1,  1,  1, 10,  0,  0,  0);
//-----------------------------------------------------------------------------
void                EEpromWrite(void)
{
if(WriteEeprom){
            if(WR){}
            else{
               if(Fcase<datalength){
                                    EEADRH=0x00;
                                    EEADRL=Fcase;       //赋EEPROM写入地址
                                    EEDATL=MenuCase[Fcase];//赋EEPROM写入数值
                                    CFGS=DataSpace;       //指定访问闪存区或EEPROM区
                                    EEPGD=EepromSpace;    //指定访问EEPROM区
                                    WREN=AllowWrite;    //容许内部EEPROM写操作
                                    GIE=false;          //发送写序列码前必须写禁止中断
                                    EECON2=0x55;          //发送写序列码
                                    EECON2=0xaa;
                                    WR=StartWrite;       //启动写操作
                                    GIE=true;
                                    Fcase++;
                                    }
               else{
                     WREN=DisAllowWrite;//禁止EEPROM/FLASH写操作
                     WriteEeprom=false;
                     }
               }
            }
}
//-----------------------------------------------------------------------------
void                EEpromRead(void)
{
uchar DataCount=0x00;
while(DataCount<datalength){
                        MenuCase[DataCount]=EEPROM_READ(DataCount);
                        DataCount++;
                        }
}
//-----------------------------------------------------------------------------

2万 · 2012-2-27 14:20

//-----------------------------------------------------------------------------
//filename: eeprom.h
//Version:  v1.0
//Designer: yezhen
//StartTime:2012-2-6
//EndTime:
//History:
//-----------------------------------------------------------------------------
#include          "common.h"
//-----------------------------------------------------------------------------
#define             DataSpace          0
#define             ConfigSpace       1
#define             EepromSpace       0
#define             FlashSpace          1
#define             DisAllowWrite       0
#define             AllowWrite          1
#define             StartWrite          1
//-----------------------------------------------------------------------------
extern             schar             MenuCase[];
extern             BYTEBIT             sysflag;
extern             uchar             Fcase;
//-----------------------------------------------------------------------------