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stc89c52单片机的EEPROM问题

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发布时间: 2021-1-19 16:22

正文摘要:

看STC89C52的手册关于EEPROM部分，不清楚P1是什么作用？手册中和测试程序中的说明部分并没有提到和ISP寄存器有什么关联，下面是部分程序，

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ID:825883 发表于 2021-1-21 08:49
人人学会单片机 发表于 2021-1-19 18:57
STC所指的EEPROM文件 跟我们自己写的程序没有绝对关系，它只是一个EEPROM文件

ID:825883 发表于 2021-1-21 08:28
wulin 发表于 2021-1-19 17:31
P1在这个示例中是用来接LED可以直观了解EEPROM的读写成功或失败。给你一个示例比较好理解些。读写时间有点 ...

谢谢你
ID:390416 发表于 2021-1-19 18:57
STC所指的EEPROM文件 跟我们自己写的程序没有绝对关系，它只是一个EEPROM文件
ID:825883 发表于 2021-1-19 17:40
好像是用于指示操作是否完成的。为什么在STC-isp界面右侧的EEPROM文件选项卡中，没有数据呢？
ID:213173 发表于 2021-1-19 17:31
P1在这个示例中是用来接LED可以直观了解EEPROM的读写成功或失败。给你一个示例比较好理解些。读写时间有点长。
  1. #include <reg52.h>      //52系列单片机头文件
  2. #include <intrins.h>
  3. #include <stdlib.h>        //包含产生随机数用到的rand()函数。
  4. #define uchar unsigned char
  5. #define uint unsigned int
  6. //定义ISP的操作命令
  7. #define RdCommand 0x01                //读命令
  8. #define PrgCommand 0x02                //写命令
  9. #define EraseCommand 0x03        //擦除命令
  10. #define WaitTime 0x01                 //定义CPU的等待时间,写入硬件延时
  11. /*STC89系列EEPROM寄存器声明*/
  12. sfr ISP_DATA=0xe2;                //0000,0000 EEPROM数据寄存器
  13. sfr ISP_ADDRH=0xe3;                //0000,0000 EEPROM地址高字节
  14. sfr ISP_ADDRL=0xe4;                //0000,0000 EEPROM地址第字节
  15. sfr ISP_CMD=0xe5;                //xxxx,xx00 EEPROM命令寄存器
  16. sfr ISP_TRIG=0xe6;                //0000,0000 EEPRPM命令触发寄存器
  17. sfr ISP_CONTR=0xe7;                //0000,x000 EEPROM控制寄存器

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

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

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

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


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