标题: 52单片机内部EEprom使用问题 [打印本页]
作者: 13325662598    时间: 2021-4-14 20:22
标题: 52单片机内部EEprom使用问题
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;
}



作者: man1234567    时间: 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 ？
作者: 张天师    时间: 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。
作者: Kxuan163    时间: 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。
作者: wulin    时间: 2021-4-16 20:57
  1. //EEPROM多字节多扇区读写应用示例
  2. #include <reg52.h>      //52系列单片机头文件
  3. #include <intrins.h>
  4. #include <stdlib.h>        //包含产生随机数用到的rand()函数。
  5. #define uchar unsigned char
  6. #define uint unsigned int
  7. //定义ISP的操作命令
  8. #define RdCommand 0x01                //读命令
  9. #define PrgCommand 0x02                //写命令
  10. #define EraseCommand 0x03        //擦除命令
  11. #define WaitTime 0x01                 //定义CPU的等待时间,写入硬件延时
  12. /*STC89系列EEPROM寄存器声明*/
  13. sfr ISP_DATA=0xe2;                //0000,0000 EEPROM数据寄存器
  14. sfr ISP_ADDRH=0xe3;                //0000,0000 EEPROM地址高字节
  15. sfr ISP_ADDRL=0xe4;                //0000,0000 EEPROM地址第字节
  16. sfr ISP_CMD=0xe5;                //xxxx,xx00 EEPROM命令寄存器
  17. sfr ISP_TRIG=0xe6;                //0000,0000 EEPRPM命令触发寄存器
  18. sfr ISP_CONTR=0xe7;                //0000,x000 EEPROM控制寄存器

  20. sbit LED1=P1^0;
  21. sbit LED2=P1^7;

  23. /* 测试常量数组 */
  24. uchar code table[512] =
  25. {
  26.     0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
  27.     0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
  28.     0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
  29.     0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
  30.     0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
  31.     0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
  32.     0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
  33.     0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
  34.     0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
  35.     0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
  36.     0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
  37.     0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
  38.     0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,
  39.     0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
  40.     0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,
  41.     0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff,
  42.     0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0,
  43.     0xef,0xee,0xed,0xec,0xeb,0xea,0xe9,0xe8,0xe7,0xe6,0xe5,0xe4,0xe3,0xe2,0xe1,0xe0,
  44.     0xdf,0xde,0xdd,0xdc,0xdb,0xda,0xd9,0xd8,0xd7,0xd6,0xd5,0xd4,0xd3,0xd2,0xd1,0xd0,
  45.     0xcf,0xce,0xcd,0xcc,0xcb,0xca,0xc9,0xc8,0xc7,0xc6,0xc5,0xc4,0xc3,0xc2,0xc1,0xc0,
  46.     0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0,
  47.     0xaf,0xae,0xad,0xac,0xab,0xaa,0xa9,0xa8,0xa7,0xa6,0xa5,0xa4,0xa3,0xa2,0xa1,0xa0,
  48.     0x9f,0x9e,0x9d,0x9c,0x9b,0x9a,0x99,0x98,0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90,
  49.     0x8f,0x8e,0x8d,0x8c,0x8b,0x8a,0x89,0x88,0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80,
  50.     0x7f,0x7e,0x7d,0x7c,0x7b,0x7a,0x79,0x78,0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70,
  51.     0x6f,0x6e,0x6d,0x6c,0x6b,0x6a,0x69,0x68,0x67,0x66,0x65,0x64,0x63,0x62,0x61,0x60,
  52.     0x5f,0x5e,0x5d,0x5c,0x5b,0x5a,0x59,0x58,0x57,0x56,0x55,0x54,0x53,0x52,0x51,0x50,
  53.     0x4f,0x4e,0x4d,0x4c,0x4b,0x4a,0x49,0x48,0x47,0x46,0x45,0x44,0x43,0x42,0x41,0x40,
  54.     0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x33,0x36,0x35,0x34,0x33,0x32,0x31,0x30,
  55.     0x2f,0x2e,0x2d,0x2c,0x2b,0x2a,0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,
  56.     0x1f,0x1e,0x1d,0x1c,0x1b,0x1a,0x19,0x18,0x17,0x16,0x15,0x14,0x13,0x12,0x11,0x10,
  57.     0x0f,0x0e,0x0d,0x0c,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00
  58. };

  60. uint code table1[]={0x2000,0x2200,0x2400,0x2600,0x2800,0x2a00};//STC89C52RC EEPROM 扇区地址
  61. //uint code table1[]={0x4000,0x4200,0x4400,0x4600,0x4800,0x4a00};//STC89C54 EEPROM 扇区地址
  62. uint Random;//随机数变量
  63. /* ================ 打开 ISP,IAP 功能 ================= */
  64. void ISP_IAP_enable(void)
  65. {
  66.         EA = 0;       /* 关中断   */
  67.         ISP_CONTR = ISP_CONTR & 0x18;       /* 0001,1000 */
  68.         ISP_CONTR = ISP_CONTR | WaitTime; /* 写入硬件延时 */
  69.         ISP_CONTR = ISP_CONTR | 0x80;       /* ISPEN=1  */
  70. }
  71. /* =============== 关闭 ISP,IAP 功能 ================== */
  72. void ISP_IAP_disable(void)
  73. {
  74.         ISP_CONTR = ISP_CONTR & 0x7f; /* ISPEN = 0 */
  75.         ISP_TRIG = 0x00;
  76.         EA   =   1;   /* 开中断 */
  77. }
  78. /* ================ 公用的触发代码 ==================== */
  79. void ISPgoon(void)
  80. {
  81.         ISP_IAP_enable();   /* 打开 ISP,IAP 功能 */
  82.         ISP_TRIG = 0x46;  /* 触发ISP_IAP命令字节1 */
  83.         ISP_TRIG = 0xb9;  /* 触发ISP_IAP命令字节2 */
  84.         _nop_();
  85. }
  86. /* ==================== 字节读 ======================== */
  87. uchar byte_read(uint byte_addr)
  88. {
  89.         ISP_ADDRH = (uchar)(byte_addr >> 8);/* 地址赋值 */
  90.         ISP_ADDRL = (uchar)(byte_addr & 0x00ff);
  91.         ISP_CMD   = ISP_CMD & 0xf8;   /* 清除低3位  */
  92.         ISP_CMD   = ISP_CMD | RdCommand; /* 写入读命令 */
  93.         ISPgoon();       /* 触发执行  */
  94.         ISP_IAP_disable();    /* 关闭ISP,IAP功能 */
  95.         return (ISP_DATA);    /* 返回读到的数据 */
  96. }
  97. /* ================== 扇区擦除 ======================== */
  98. void SectorErase(uint sector_addr)
  99. {
  100.         uint iSectorAddr;
  101.         iSectorAddr = (sector_addr & 0xfe00); /* 取扇区地址 */
  102.         ISP_ADDRH = (uchar)(iSectorAddr >> 8);
  103.         ISP_ADDRL = 0x00;
  104.         ISP_CMD = ISP_CMD & 0xf8;   /* 清空低3位  */
  105.         ISP_CMD = ISP_CMD | EraseCommand; /* 擦除命令3  */
  106.         ISPgoon();       /* 触发执行  */
  107.         ISP_IAP_disable();    /* 关闭ISP,IAP功能 */
  108. }
  109. /* ==================== 字节写 ======================== */
  110. void byte_write(uint byte_addr, uchar original_data)
  111. {
  112.         ISP_ADDRH = (uchar)(byte_addr >> 8);  /* 取地址  */
  113.         ISP_ADDRL = (uchar)(byte_addr & 0x00ff);
  114.         ISP_CMD  = ISP_CMD & 0xf8;    /* 清低3位 */
  115.         ISP_CMD  = ISP_CMD | PrgCommand;  /* 写命令2 */
  116.         ISP_DATA = original_data;   /* 写入数据准备 */
  117.         ISPgoon();       /* 触发执行  */
  118.         ISP_IAP_disable();     /* 关闭IAP功能 */
  119. }

  121. void main()
  122. {
  123.         uchar i;
  124.         uint j,k;
  125.         LED2=0;//LED2亮
  126.         k=50000;
  127.         while(k--);//延时等待系统稳定
  128.         LED2=1;//LED2灭
  129.         for(i=0;i<6;i++)//循环写6个扇区
  130.         {
  131.                 SectorErase(table1[i]);//擦除扇区
  132.                 for(j=0;j<512;j++)//循环写512个字节
  133.                 {
  134.                         byte_write(table1[i]+j,table[j]);//写入数据
  135.                         if(byte_read(table1[i]+j)!= table[j])//比较对错
  136.                         {
  137.                                 LED1=0;//错误LED1亮
  138.                                 k=50000;
  139.                                 while(k--);//延时便于观察
  140.                                 LED1=1;//LED1灭
  141.                         }       
  142.                 }
  143.         }
  144.         Random=rand()/64;//生成0~511随机数  
  145.         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
  146.                 LED2=0;//正确LED2亮
  147.         else LED1=0;//错误LED1亮
  148.         while(1);
  149. }
复制代码




欢迎光临 (http://www.51hei.com/bbs/) Powered by Discuz! X3.1