最新C8051F120单片机读写Samsung FLASH存储器程序

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huolf|

楼主 | 2009-9-20 17:16 | 只看该作者回帖奖励

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Flash存储器, C8051F120, 读写, 单片机, Samsung

DBMODE  为数据线的输入输出模式为单片机的PXMDOUT
DBOUT 为输出模式
DBus    为数据端口 Px

/--------FLASH命令传送------//
void Comm_Latch_Cycle(uchar COMMAND)
{
      uchar SFRPAGE_SAVE = SFRPAGE;
  SFRPAGE = CONFIG_PAGE;
DBMODE  = DBOUT;
      ALE=0;
  ALE=0;
  CLE=1;
  RE=1;
  WE=1;
  DBus=COMMAND;          //WRITE COMMAND
   WE=0;
  WE=1;
  CLE=0;
  ALE=0;
  SFRPAGE = SFRPAGE_SAVE;

}
//------------------ 传送地址------------------------------
void Add_Latch_Cycle(uint ADDR )  //传送地址，ADDR为页地址,从addr页第0字节开始
{
   uchar SFRPAGE_SAVE = SFRPAGE;
   SFRPAGE = CONFIG_PAGE;
  DBMODE= DBOUT;
  CLE=0;
  ALE=1;
  RE=1;
  WE=1;
  DBus=0;                //A0-A7，column address
      WE=0;
  WE=1;
  DBus=(uchar)ADDR;       //A9-A16 ,Row Address page address A12-A29
   WE=0;
  WE=1;
  DBus=(uchar)(ADDR>>8);    //A17-A24,Row Address
  WE=0;
  WE=1;
  ALE=0;
  CLE=0;
      SFRPAGE = SFRPAGE_SAVE;
}
//读状态,状态正确时返回0，错误时返回1
uchar Status_Read(void)
{
uchar  Status;
Comm_Latch_Cycle(0x70);
Status=Read_Byte();
Status=Status & 0x01;
return Status;    //status=0 erease ok else failled
}
//从FLASH读一个字节
uchar Read_Byte(void)             //read one byte from flash
{
   uchar Rdata;
  char SFRPAGE_SAVE = SFRPAGE;
  SFRPGCN=CONFIG_PAGE;
  DBMODE = DBIN;                   //Data Bus input mode
   DBus = 0xFF;
  ALE =0;
  CLE =0;
   RE  =1;
   RE  =0;
   Rdata =DBus;
   RE=1;
  SFRPAGE = SFRPAGE_SAVE;
      return(Rdata);
}

信息来源：http://www.52embed.com/viewthread.php?tid=97&extra=page%3D1

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最新C8051F120单片机读写Samsung FLASH存储器程序

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