52单片机内部EEprom使用问题

ID:858245 · 发表于 2021-4-14 20:22

这是52单片机内部EEprom程序数据能存储，但是存储的是上一次的数据。而这次的数据下次再存储的时候才能存储，
请帮忙看看问题出哪了

void ISP_STOP()       //52EEPROM停止写数据
{
      ISP_CONTR=0;
      ISP_CMD=0;
      ISP_TRIG=0;

}
u8 ISP_READ(u16 add)  //52EEPROM读数据
{
      u8 dat;
      EA=0;
      ISP_CONTR = 0x82;
      ISP_CMD=0x01;
      ISP_ADDRL=add&0xff;
      ISP_ADDRH=add>>8;
      ISP_TRIG=0x46;
      ISP_TRIG=0xb9;
      _nop_();
      dat = ISP_DATA;
      ISP_STOP();
         EA=1;
return (dat) ;
}
void ISP_ERASE(u16 add)       //52EEPROM擦除
{
      EA=0;
      ISP_CONTR = 0x82;
      ISP_CMD=0x03;
      ISP_ADDRL=add&0xff;
      ISP_ADDRH=add>>8;
      ISP_TRIG=0x46;
      ISP_TRIG=0xb9;
      ISP_STOP();
EA=1;
}
void ISP_WITE(u8 DATA,u16 add)       //52EEPROM写数据
{
      EA=0;
      ISP_CONTR = 0x82;
      ISP_CMD=0x02;
      ISP_ADDRL=add&0xff;
      ISP_ADDRH=add>>8;
      ISP_TRIG=0x46;
      ISP_TRIG=0xb9;
      _nop_();
      ISP_DATA=DATA;
      ISP_STOP();
      EA=1;
}

ID:584814 · 发表于 2021-4-16 11:06

说个和你提出的问题类似的：
我的彩电修不好，请帮忙看一下万用表、镙丝刀、电烙铁、焊锡丝哪个有问题？

ID:814525 · 发表于 2021-4-16 16:35

52单片机内部EEprom要重新写数据，是要先擦除片区，再写入。估计你把先后顺序高反了。

ID:858964 · 发表于 2021-4-16 17:18

建议试试：
在擦除函数，写数据函数 ISP_STOP(); 代码行之前，添加延时几毫秒的代码。

ID:213173 · 发表于 2021-4-16 20:57

//EEPROM多字节多扇区读写应用示例
#include <reg52.h> //52系列单片机头文件
#include <intrins.h>
#include <stdlib.h> //包含产生随机数用到的rand()函数。
#define uchar unsigned char
#define uint unsigned int
//定义ISP的操作命令
#define RdCommand 0x01 //读命令
#define PrgCommand 0x02 //写命令
#define EraseCommand 0x03 //擦除命令
#define WaitTime 0x01 //定义CPU的等待时间,写入硬件延时
/*STC89系列EEPROM寄存器声明*/
sfr ISP_DATA=0xe2; //0000,0000 EEPROM数据寄存器
sfr ISP_ADDRH=0xe3; //0000,0000 EEPROM地址高字节
sfr ISP_ADDRL=0xe4; //0000,0000 EEPROM地址第字节
sfr ISP_CMD=0xe5; //xxxx,xx00 EEPROM命令寄存器
sfr ISP_TRIG=0xe6; //0000,0000 EEPRPM命令触发寄存器
sfr ISP_CONTR=0xe7; //0000,x000 EEPROM控制寄存器
sbit LED1=P1^0;
sbit LED2=P1^7;
/* 测试常量数组 */
uchar code table[512] =
{
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,
0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff,
0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0,
0xef,0xee,0xed,0xec,0xeb,0xea,0xe9,0xe8,0xe7,0xe6,0xe5,0xe4,0xe3,0xe2,0xe1,0xe0,
0xdf,0xde,0xdd,0xdc,0xdb,0xda,0xd9,0xd8,0xd7,0xd6,0xd5,0xd4,0xd3,0xd2,0xd1,0xd0,
0xcf,0xce,0xcd,0xcc,0xcb,0xca,0xc9,0xc8,0xc7,0xc6,0xc5,0xc4,0xc3,0xc2,0xc1,0xc0,
0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0,
0xaf,0xae,0xad,0xac,0xab,0xaa,0xa9,0xa8,0xa7,0xa6,0xa5,0xa4,0xa3,0xa2,0xa1,0xa0,
0x9f,0x9e,0x9d,0x9c,0x9b,0x9a,0x99,0x98,0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90,
0x8f,0x8e,0x8d,0x8c,0x8b,0x8a,0x89,0x88,0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80,
0x7f,0x7e,0x7d,0x7c,0x7b,0x7a,0x79,0x78,0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70,
0x6f,0x6e,0x6d,0x6c,0x6b,0x6a,0x69,0x68,0x67,0x66,0x65,0x64,0x63,0x62,0x61,0x60,
0x5f,0x5e,0x5d,0x5c,0x5b,0x5a,0x59,0x58,0x57,0x56,0x55,0x54,0x53,0x52,0x51,0x50,
0x4f,0x4e,0x4d,0x4c,0x4b,0x4a,0x49,0x48,0x47,0x46,0x45,0x44,0x43,0x42,0x41,0x40,
0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x33,0x36,0x35,0x34,0x33,0x32,0x31,0x30,
0x2f,0x2e,0x2d,0x2c,0x2b,0x2a,0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,
0x1f,0x1e,0x1d,0x1c,0x1b,0x1a,0x19,0x18,0x17,0x16,0x15,0x14,0x13,0x12,0x11,0x10,
0x0f,0x0e,0x0d,0x0c,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00
};
uint code table1[]={0x2000,0x2200,0x2400,0x2600,0x2800,0x2a00};//STC89C52RC EEPROM 扇区地址
//uint code table1[]={0x4000,0x4200,0x4400,0x4600,0x4800,0x4a00};//STC89C54 EEPROM 扇区地址
uint Random;//随机数变量
/* ================ 打开 ISP,IAP 功能 ================= */
void ISP_IAP_enable(void)
{
EA = 0; /* 关中断 */
ISP_CONTR = ISP_CONTR & 0x18; /* 0001,1000 */
ISP_CONTR = ISP_CONTR | WaitTime; /* 写入硬件延时 */
ISP_CONTR = ISP_CONTR | 0x80; /* ISPEN=1 */
}
/* =============== 关闭 ISP,IAP 功能 ================== */
void ISP_IAP_disable(void)
{
ISP_CONTR = ISP_CONTR & 0x7f; /* ISPEN = 0 */
ISP_TRIG = 0x00;
EA = 1; /* 开中断 */
}
/* ================ 公用的触发代码 ==================== */
void ISPgoon(void)
{
ISP_IAP_enable(); /* 打开 ISP,IAP 功能 */
ISP_TRIG = 0x46; /* 触发ISP_IAP命令字节1 */
ISP_TRIG = 0xb9; /* 触发ISP_IAP命令字节2 */
_nop_();
}
/* ==================== 字节读 ======================== */
uchar byte_read(uint byte_addr)
{
ISP_ADDRH = (uchar)(byte_addr >> 8);/* 地址赋值 */
ISP_ADDRL = (uchar)(byte_addr & 0x00ff);
ISP_CMD = ISP_CMD & 0xf8; /* 清除低3位 */
ISP_CMD = ISP_CMD | RdCommand; /* 写入读命令 */
ISPgoon(); /* 触发执行 */
ISP_IAP_disable(); /* 关闭ISP,IAP功能 */
return (ISP_DATA); /* 返回读到的数据 */
}
/* ================== 扇区擦除 ======================== */
void SectorErase(uint sector_addr)
{
uint iSectorAddr;
iSectorAddr = (sector_addr & 0xfe00); /* 取扇区地址 */
ISP_ADDRH = (uchar)(iSectorAddr >> 8);
ISP_ADDRL = 0x00;
ISP_CMD = ISP_CMD & 0xf8; /* 清空低3位 */
ISP_CMD = ISP_CMD | EraseCommand; /* 擦除命令3 */
ISPgoon(); /* 触发执行 */
ISP_IAP_disable(); /* 关闭ISP,IAP功能 */
}
/* ==================== 字节写 ======================== */
void byte_write(uint byte_addr, uchar original_data)
{
ISP_ADDRH = (uchar)(byte_addr >> 8); /* 取地址 */
ISP_ADDRL = (uchar)(byte_addr & 0x00ff);
ISP_CMD = ISP_CMD & 0xf8; /* 清低3位 */
ISP_CMD = ISP_CMD | PrgCommand; /* 写命令2 */
ISP_DATA = original_data; /* 写入数据准备 */
ISPgoon(); /* 触发执行 */
ISP_IAP_disable(); /* 关闭IAP功能 */
}
void main()
{
uchar i;
uint j,k;
LED2=0;//LED2亮
k=50000;
while(k--);//延时等待系统稳定
LED2=1;//LED2灭
for(i=0;i<6;i++)//循环写6个扇区
{
SectorErase(table1[i]);//擦除扇区
for(j=0;j<512;j++)//循环写512个字节
{
byte_write(table1[i]+j,table[j]);//写入数据
if(byte_read(table1[i]+j)!= table[j])//比较对错
{
LED1=0;//错误LED1亮
k=50000;
while(k--);//延时便于观察
LED1=1;//LED1灭
}
}
}
Random=rand()/64;//生成0~511随机数
if(byte_read(table1[Random%6]+Random)==table[Random])//随机在6个扇区的随机地址抽样比对
LED2=0;//正确LED2亮
else LED1=0;//错误LED1亮
while(1);
}

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52单片机内部EEprom使用问题

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