求助单片机EEPROM储存问题,每次都是储存的跟读出的不一样

ID:45129 · 发表于 2020-4-11 13:33

我在单片机上储存数据时，每次都是储存的跟读出的不一样，我把程序贴上来，求大神指导下
/*当前米数储存子程序*/
void dqmscc()
{
uchar w,q,b,g,s;
  w=(unsigned char)dqms/10%10;
  q=(unsigned char)dqms/100%10;
  b=(unsigned char)dqms/10%10;
  s=(unsigned char)dqms/10%10;
  g=(unsigned char)dqms%10;
  SectorErase(0x2000);
  byte_write(0x2000,w);
  byte_write(0x2008,q);
  byte_write(0x200f,b);
  byte_write(0x2017,s);
  byte_write(0x201e,g);
}
/*当前米数读出子程序*/
void dqmsdc()
{
  uchar w,q,b,g,s;
  w=byte_read(0x2000);
  q=byte_read(0x2008);
  b=byte_read(0x200f);
  s=byte_read(0x2017);
  g=byte_read(0x201e);
  dqms=w*10000+q*1000+b*100+s*10+g;
}

ID:580799 · 发表于 2020-4-11 14:01

/*当前米数储存子程序*/
void dqmscc()
{
uchar w,q,b,g,s;
  w=(unsigned char)dqms/10000%10;
  q=(unsigned char)dqms/1000%10;
  b=(unsigned char)dqms/100%10;
  s=(unsigned char)dqms/10%10;
  g=(unsigned char)dqms%10;
  SectorErase(0x2000);
  byte_write(0x2000,w);
  byte_write(0x2008,q);
  byte_write(0x200f,b);
  byte_write(0x2017,s);
  byte_write(0x201e,g);
}
/*当前米数读出子程序*/
void dqmsdc()
{
  uchar w,q,b,g,s;
  w=byte_read(0x2000);
  q=byte_read(0x2008);
  b=byte_read(0x200f);
  s=byte_read(0x2017);
  g=byte_read(0x201e);
  dqms=w*10000+q*1000+b*100+s*10+g;
}

最好写成
/*当前米数储存子程序*/
void dqmscc()
{
uchar w,q,b,g,s;
  q=(qms>>24)&0xff;
  b=(dqms>>16)&0xff;
  s=(dqms>>8)&0xff;
  g=dqms&0xff;
  SectorErase(0x2000);
  byte_write(0x2000,w);
  byte_write(0x2008,q);
  byte_write(0x200f,b);
  byte_write(0x2017,s);
  byte_write(0x201e,g);
}
/*当前米数读出子程序*/
void dqmsdc()
{
  uchar w,q,b,g,s;
  q=byte_read(0x2008);
  b=byte_read(0x200f);
  s=byte_read(0x2017);
  g=byte_read(0x201e);
  dqms=(q<<24)|(b<<16)|(s<<8)|g;
}

ID:235200 · 发表于 2020-4-11 14:21

要贴出byte_read　byte_write两个子函数,贴出这个看不出来

ID:213173 · 发表于 2020-4-11 15:49

不知你是用单片机内置EEPROM还是外挂EEPROM。如果是内置也得知道单片机品牌型号，否则这么理解你的程序？

ID:45129 · 发表于 2020-4-11 17:47

csmyldl 发表于 2020-4-11 14:21
要贴出byte_read　byte_write两个子函数,贴出这个看不出来

/* ==================== 字节读 ======================== */
unsigned char byte_read(unsigned int byte_addr)
{
ISP_ADDRH = (unsigned char)(byte_addr >> 8); /* 地址赋值 */
ISP_ADDRL = (unsigned char)(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(unsigned int sector_addr)
{
unsigned int iSectorAddr;
iSectorAddr = (sector_addr & 0xfe00); /* 取扇区地址 */
ISP_ADDRH = (unsigned char)(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(unsigned int byte_addr, unsigned char original_data)
{
ISP_ADDRH = (unsigned char)(byte_addr >> 8); /* 取地址 */
ISP_ADDRL = (unsigned char)(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 */
delayms1(20);
ISPgoon(); /* 触发执行 */
ISP_IAP_disable(); /* 关闭IAP功能 */
}
你好，这个是字节写跟字节读的程序，麻烦帮忙看下，单片机是STC89C52,内部EEPROM

ID:45129 · 发表于 2020-4-11 17:48

xingqi 发表于 2020-4-11 14:01
/*当前米数储存子程序*/
void dqmscc()
{

谢谢，我试下看看

ID:45129 · 发表于 2020-4-11 17:49

wulin 发表于 2020-4-11 15:49
不知你是用单片机内置EEPROM还是外挂EEPROM。如果是内置也得知道单片机品牌型号，否则这么理解你的程序？

谢谢提醒，单片机是STC879C52，用的是内部EEPROM

ID:45129 · 发表于 2020-4-11 20:03

xingqi 发表于 2020-4-11 14:01
/*当前米数储存子程序*/
void dqmscc()
{

你好，你修改的这个含税万位数是没有处理吗？

ID:213173 · 发表于 2020-4-11 20:49

hamburger3975 发表于 2020-4-11 17:49
谢谢提醒，单片机是STC879C52，用的是内部EEPROM

这是STS89C52多字节读写EEPROM的官方示例程序，汉字注释是自己添加的。

/*------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------------------------------------*/
/* --- STC89-90xx Series MCU ISP/IAP/EEPROM Demo -------------------*/
/* --- Mobile: (86)13922805190 -------------------------------------*/
/* If you want to use the program or the program referenced in the */
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#include "reg51.h"
#include "intrins.h"
typedef unsigned char BYTE;
typedef unsigned int WORD;
/*Declare SFR associated with the IAP */
sfr IAP_DATA = 0xE2; //Flash data register
sfr IAP_ADDRH = 0xE3; //Flash address HIGH
sfr IAP_ADDRL = 0xE4; //Flash address LOW
sfr IAP_CMD = 0xE5; //Flash command register
sfr IAP_TRIG = 0xE6; //Flash command trigger
sfr IAP_CONTR = 0xE7; //Flash control register
/*Define ISP/IAP/EEPROM command*/
#define CMD_IDLE 0 //Stand-By
#define CMD_READ 1 //Byte-Read
#define CMD_PROGRAM 2 //Byte-Program
#define CMD_ERASE 3 //Sector-Erase
/*Define ISP/IAP/EEPROM operation const for IAP_CONTR*/
//#define ENABLE_IAP 0x80 //if SYSCLK<40MHz
#define ENABLE_IAP 0x81 //if SYSCLK<20MHz
//#define ENABLE_IAP x82 //if SYSCLK<10MHz
//#define ENABLE_IAP 0x83 //if SYSCLK<5MHz
//Start address for STC89C58xx EEPROM
//#define IAP_ADDRESS 0x08000
#define IAP_ADDRESS 0x02000 //宏定义EEPROM起始地址
void Delay(BYTE n);
void IapIdle();//关闭IAP
BYTE IapReadByte(WORD addr);//IAP读字节
void IapProgramByte(WORD addr, BYTE dat);//写字节
void IapEraseSector(WORD addr);//扇区擦除
void main()
{
WORD i;
P1 = 0xfe; //1111,1110 System Reset OK
Delay(10); //Delay
IapEraseSector(IAP_ADDRESS); //Erase current sector//IAP_ADDRESS扇区擦除
for (i=0; i<512; i++) //Check whether all sector data is FF
{
if (IapReadByte(IAP_ADDRESS+i) != 0xff)//读IAP_ADDRESS+i是否=0xff
goto Error; //If error, break（ goto Error;无条件跳转语句）
}
P1 = 0xfc; //1111,1100 Erase successful
Delay(10); //Delay
for (i=0; i<512; i++) //Program 512 bytes data into data flash
{
IapProgramByte(IAP_ADDRESS+i, (BYTE)i);//写IAP_ADDRESS扇区数据
}
P1 = 0xf8; //1111,1000 Program successful
Delay(10); //Delay
for (i=0; i<512; i++) //Verify 512 bytes data
{
if (IapReadByte(IAP_ADDRESS+i) != (BYTE)i)//读IAP_ADDRESS扇区数据
goto Error; //If error, break
}
P1 = 0xf0; //1111,0000 Verify successful
while (1);
Error:
P1 &= 0x7f; //0xxx,xxxx IAP operation fail
while (1);
}
/*----------------------------
Software delay function
----------------------------*/
void Delay(BYTE n)
{
WORD x;
while (n--)
{
x = 0;
while (++x);
}
}
/*----------------------------
Disable ISP/IAP/EEPROM function
Make MCU in a safe state
----------------------------*/
void IapIdle()
{
IAP_CONTR = 0; //Close IAP function
IAP_CMD = 0; //Clear command to standby
IAP_TRIG = 0; //Clear trigger register
IAP_ADDRH = 0x80; //Data ptr point to non-EEPROM area
IAP_ADDRL = 0; //Clear IAP address to prevent misuse
}
/*----------------------------
Read one byte from ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
Output:Flash data
----------------------------*/
BYTE IapReadByte(WORD addr)
{
BYTE dat; //Data buffer
IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
IAP_CMD = CMD_READ; //Set ISP/IAP/EEPROM READ command
IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
IAP_TRIG = 0x46; //Send trigger command1 (0x46)
IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
dat = IAP_DATA; //Read ISP/IAP/EEPROM data
IapIdle(); //Close ISP/IAP/EEPROM function
return dat; //Return Flash data
}
/*----------------------------
Program one byte to ISP/IAP/EEPROM area
Input: addr (ISP/IAP/EEPROM address)
dat (ISP/IAP/EEPROM data)
Output:-
----------------------------*/
void IapProgramByte(WORD addr, BYTE dat)
{
IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
IAP_CMD = CMD_PROGRAM; //Set ISP/IAP/EEPROM PROGRAM command
IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
IAP_DATA = dat; //Write ISP/IAP/EEPROM data
IAP_TRIG = 0x46; //Send trigger command1 (0x46)
IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
IapIdle();
}
/*----------------------------
Erase one sector area
Input: addr (ISP/IAP/EEPROM address)
Output:-
----------------------------*/
void IapEraseSector(WORD addr)
{
IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
IAP_CMD = CMD_ERASE; //Set ISP/IAP/EEPROM ERASE command
IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
IAP_TRIG = 0x46; //Send trigger command1 (0x46)
IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
IapIdle();
}

复制代码

ID:45129 · 发表于 2020-4-12 10:48

wulin 发表于 2020-4-11 20:49
这是STS89C52多字节读写EEPROM的官方示例程序，汉字注释是自己添加的。

好的，谢谢。

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