EEPROM的例程更改问题

发表于 2018-3-5 21:06

UINT8 read_APROM_BYTE(unsigned int code *u16_addr)
{

      UINT8 rdata;
      rdata = *(u16_addr)>>8;
      return rdata;
}
//-------------------------------------------------------------------------

/*****************************************************************************************************************
write_DATAFLASH_BYTE :
user can copy all this subroutine into project, then call this function in main.
******************************************************************************************************************/
void write_DATAFLASH_BYTE(UINT16 u16_addr,UINT8 u8_data)
{
      UINT8 looptmp=0,u8_addrl_r;
      unsigned char code *cd_longaddr;
      unsigned char xdata *xd_tmp;

//Check page start address
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            u8_addrl_r = 0;
      }
      else
      {
            u8_addrl_r = 0x80;
      }
//Save APROM data to XRAM
      xd_tmp = 0x80;
      cd_longaddr = (u16_addr&0xff00)+u8_addrl_r;
      while (xd_tmp !=0x100)
      {
            *xd_tmp = *cd_longaddr;
            looptmp++;
            xd_tmp++;
            cd_longaddr++;
      }
// Modify customer data in XRAM
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            xd_tmp = u8_addrl_r+0x80;
      }
      else
      {
            xd_tmp = u8_addrl_r+0;
      }
      *xd_tmp = u8_data;
//Erase APROM DATAFLASH page
            IAPAL = u16_addr;
            IAPAH = u16_addr>>8;
            IAPFD = 0xFF;
      set_IAPEN;
            set_APUEN;
IAPCN = 0x22;
            set_IAPGO;
//Save changed RAM data to APROM DATAFLASH
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            u8_addrl_r =0;
      }
      else
      {
            u8_addrl_r = 0x80;
      }
            xd_tmp = 0x80;
      IAPAL = u8_addrl_r;
IAPAH = u16_addr>>8;
            set_IAPEN;
            set_APUEN;
      IAPCN = 0x21;
            while (xd_tmp !=0xFF)
            {
                     IAPFD = *xd_tmp;
                     set_IAPGO;
                     IAPAL++;
                     xd_tmp++;
            }
            clr_APUEN;
            clr_IAPEN;
}
/******************************************************************************************************************/

void main (void)
{
            UINT8 datatemp;
/* -------------------------------------------------------------------------*/
/*  Dataflash use APROM area                                                                                                                      */
/*       APROM 0x3800~0x38FF demo as dataflash                                                                                                    */
/* Please use Memory window key in C:0x3800 to check earse result                                        */
/* -------------------------------------------------------------------------*/

//call write byte
            write_DATAFLASH_BYTE (0x3881,0x55);
            write_DATAFLASH_BYTE (0x3882,0x56);
            write_DATAFLASH_BYTE (0x3855,0xaa);
            write_DATAFLASH_BYTE (0x3856,0x66);
//call read byte
            datatemp = read_APROM_BYTE(0x3882);
while(1);
}

UINT8 read_APROM_BYTE(unsigned int code *u16_addr)
{

      UINT8 rdata;
      rdata = *(0x3800+u16_addr)>>8;
      return rdata;
}
//-------------------------------------------------------------------------

/*****************************************************************************************************************
write_DATAFLASH_BYTE :
user can copy all this subroutine into project, then call this function in main.
******************************************************************************************************************/
void write_DATAFLASH_BYTE(UINT16 u16_addr,UINT8 u8_data)
{
      UINT8 looptmp=0,u8_addrl_r;
      unsigned char code *cd_longaddr;
      unsigned char xdata *xd_tmp;

//Check page start address
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            u8_addrl_r = 0;
      }
      else
      {
            u8_addrl_r = 0x80;
      }
//Save APROM data to XRAM
      xd_tmp = 0x80;
      cd_longaddr = (u16_addr&0xff00)+u8_addrl_r;
      while (xd_tmp !=0x100)
      {
            *xd_tmp = *cd_longaddr;
            looptmp++;
            xd_tmp++;
            cd_longaddr++;
      }
// Modify customer data in XRAM
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            xd_tmp = u8_addrl_r+0x80;
      }
      else
      {
            xd_tmp = u8_addrl_r+0;
      }
      *xd_tmp = u8_data;
//Erase APROM DATAFLASH page
            IAPAL = u16_addr;
            IAPAH = u16_addr>>8;
            IAPFD = 0xFF;
      set_IAPEN;
            set_APUEN;
IAPCN = 0x22;
            set_IAPGO;
//Save changed RAM data to APROM DATAFLASH
      u8_addrl_r = u16_addr;
      if (u8_addrl_r<0x80)
      {
            u8_addrl_r =0;
      }
      else
      {
            u8_addrl_r = 0x80;
      }
            xd_tmp = 0x80;
      IAPAL = u8_addrl_r;
IAPAH = u16_addr>>8;
            set_IAPEN;
            set_APUEN;
      IAPCN = 0x21;
            while (xd_tmp !=0xFF)
            {
                     IAPFD = *xd_tmp;
                     set_IAPGO;
                     IAPAL++;
                     xd_tmp++;
            }
            clr_APUEN;
            clr_IAPEN;
}
/******************************************************************************************************************/

void main (void)
{
            UINT8 datatemp;
/* -------------------------------------------------------------------------*/
/*  Dataflash use APROM area                                                                                                                      */
/*       APROM 0x3800~0x38FF demo as dataflash                                                                                                    */
/* Please use Memory window key in C:0x3800 to check earse result                                        */
/* -------------------------------------------------------------------------*/

//call write byte
            write_DATAFLASH_BYTE (0x3881,0x55);
            write_DATAFLASH_BYTE (0x3882,0x56);
            write_DATAFLASH_BYTE (0x3855,0xaa);
            write_DATAFLASH_BYTE (0x3856,0x66);
//call read byte
            datatemp = read_APROM_BYTE(0x82);
while(1);
}

前一个程序是例程后面的是改动两个部分改动的就是读取的方法地址一个是直接赋值  另外一个由相加确定  为什么不能实现读取？？？
还有读取的时候的地址不能附变量吗？？？

想要将例程的改为下面的可变地址需要怎么改

发表于 2018-3-5 21:33

不知道啊，肯定是跟人家的读取方式不同吧

发表于 2018-3-6 11:08

还按照人家的方法吧。

发表于 2018-3-7 09:10

直接调用人家的函数就行了，修改地址，其他不动。

发表于 2018-3-7 09:11

另外这个写操作应该还需要解除保护和写保护

发表于 2018-5-29 08:51

老兄，发现到底是什么原因导致吗？我也遇到和你一样的问题，改成地址相加的情况，就有问题了

发表于 2018-5-31 17:04

UINT8 read_APROM_BYTE(unsigned char code *u8_addr)
{
      UINT8 rdata;
      rdata = *(0x3800+(unsigned int)u8_addr)>>8;
      return rdata;
}

改成这样试一试！

[技术问答] EEPROM的例程更改问题

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