高级回复: X5045读写一体化C51程序包 -- HotPower的文潭

liuzp001 2010-10-19

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发表于 2006/12/30 1:46:50

X5045读写一体化C51程序包-(精)(11972字)hotpower2004-9-5 13:37:56[130次]

void X5045SpiOpen(void);//打开X5045片选
void X5045SpiClose(void);//关闭X5045片选
void X5045WriteEnable(void);//软件使能X5045写操作
void X5045WriteDisable(void);//软件禁止X5045写操作
unsigned char X5045SpiSend(unsigned char val);//X5045收发SPI协议
void X5045WriteByte(unsigned int addr, unsigned char val);//写X5045一个字节
void X5045WriteWord(unsigned int addr, unsigned int val);//写X5045一个字
unsigned char X5045ReadByte(unsigned int addr);//读X5045一个字节
unsigned int X5045ReadWord(unsigned int addr);//读X5045一个字
unsigned char X5045ReadStatus(void);//读X5045状态
void X5045WriteStatus(unsigned char val);//写X5045状态
void X5045WriteWait(void);//等待X5045写入完成

/*--------------------------------------
     打开X5045片选
--------------------------------------*/
void X5045SpiOpen(void)
{
  EEPROMCS    = 1;//WDT
  EEPROMSCK   = 0;
  EEPROMSIO   = 1;//SO=SI=1,释放总线
  EEPROMCS    = 0;//WDT;打开X5045片选CS
}
/*--------------------------------------
    关闭X5045片选
--------------------------------------*/
void X5045SpiClose(void)
{
  EEPROMCS    = 1;//关闭X5045片选CS
  EEPROMSIO   = 1;//SO=SI=1,释放总线
  EEPROMSCK   = 0;
}

/*--------------------------------------
    软件使能X5045写操作
--------------------------------------*/

void X5045WriteEnable(void)
{
  X5045SpiOpen();//打开X5045片选
  EEPROMWP = 1;//硬件使能X5045写操作
  X5045SpiSend(WREN);//发送使能X5045写命令
  X5045SpiClose();//关闭X5045片选
}

/*--------------------------------------
    软件禁止X5045写操作
--------------------------------------*/
void X5045WriteDisable(void)
{
  X5045SpiOpen();//打开X5045片选
  X5045SpiSend(WRDI);//发送禁止X5045写命令
  EEPROMWP = 0;//硬件禁止X5045写操作
  X5045SpiClose();//关闭X5045片选
}

/*--------------------------------------
    X5045收发SPI协议
--------------------------------------*/
unsigned char X5045SpiSend(unsigned char val)
{
unsigned char i;
  WDTRST = 0x1e;//89s52内狗
  WDTRST = 0xe1;//89s52内狗
  ACC = val;
  for (i = 8; i > 0; i --)
  {
CY = EEPROMSO;//取数据SO
    _rlca_();//存数据ACC.0读数据ACC.7同时进行
EEPROMSI = CY;//送数据SI
EEPROMSCK = 1;//上升沿打入数据
    _nop_();
EEPROMSCK  = 0;//下降沿读入数据(首次为假动作)
  }
  return ACC;
}

/*--------------------------------------
    写X5045一个字节
--------------------------------------*/
void X5045WriteByte(unsigned int addr, unsigned char val)
{
unsigned char temp;
  temp = WRITE;
  if ((addr >> 8) & 0x01) temp |= 8;
  X5045WriteEnable();//使能X5045写操作
  X5045SpiOpen();//打开X5045片选
  X5045SpiSend(temp);//发送X5045写命令及高位地址
  X5045SpiSend(addr & 0xff);//发送X5045写低位地址
  X5045SpiSend(val);//发送X5045写数据
  X5045SpiClose();//关闭X5045片选
  X5045WriteWait();//等待本次X5045写入完成
  X5045WriteDisable();//禁止X5045写操作
}

/*--------------------------------------
    写X5045一个字
--------------------------------------*/
void X5045WriteWord(unsigned int addr, unsigned int val)
{
unsigned char temp;
  temp = WRITE;
  if ((addr >> 8) & 0x01) temp |= 8;
  X5045WriteEnable();//使能X5045写操作
  X5045SpiOpen();//打开X5045片选
  X5045SpiSend(temp);//发送X5045写命令及高位地址
  X5045SpiSend(addr & 0xff);//发送X5045写低位地址
  X5045SpiSend(val & 0xff);//发送X5045写低位数据
  X5045SpiSend(val >> 8);//发送X5045写高位数据
  X5045SpiClose();//关闭X5045片选
  X5045WriteWait();//等待本次X5045写入完成
  X5045WriteDisable();//禁止X5045写操作
}

/*--------------------------------------
    读X5045一个字节
--------------------------------------*/
unsigned char X5045ReadByte(unsigned int addr)
{
unsigned char val;
  X5045SpiOpen();//打开X5045片选
  val = READ;
  if ((addr >> 8) & 0x01) val |= 8;
  X5045SpiSend(val);//发送X5045读命令及高位地址
  X5045SpiSend(addr & 0xff);//发送X5045读低位地址
  val = X5045SpiSend(0xff);//接收X5045读数据
  X5045SpiClose();//关闭X5045片选
  return val;
}

/*--------------------------------------
    读X5045一个字
--------------------------------------*/
unsigned int X5045ReadWord(unsigned int addr)
{
unsigned char val;
  X5045SpiOpen();//打开X5045片选
  val = READ;
  if ((addr >> 8) & 0x01) val |= 8;
  X5045SpiSend(val);//发送X5045读命令及高位地址
  X5045SpiSend(addr & 0xff);//发送X5045读低位地址
  val = X5045SpiSend(0xff);//接收X5045读低位数据
  addr = X5045SpiSend(0xff);//接收X5045读高位数据
  X5045SpiClose();//关闭X5045片选
  addr <<= 8;
  addr |= val;
  return addr;
}
/*--------------------------------------
    读X5045状态
--------------------------------------*/
unsigned char X5045ReadStatus(void)
{
unsigned char val;
  X5045SpiOpen();//打开X5045片选
  X5045SpiSend(RDSR);//发送读X5045状态命令
  val = X5045SpiSend(0xff);//接收X5045状态数据
  X5045SpiClose();//关闭X5045片选
  return val;
}
/*--------------------------------------
    写X5045状态
--------------------------------------*/
void X5045WriteStatus(unsigned char val)
{
  X5045SpiOpen();//打开X5045片选
  X5045SpiSend(WRSR);//发送写X5045状态命令
  X5045SpiSend(val);//发送X5045状态数据
  X5045SpiClose();//关闭X5045片选
}

/*--------------------------------------
    等待X5045写入完成
--------------------------------------*/
void X5045WriteWait(void)
{
  while (X5045ReadStatus() & WIP);//WIP=0 退出
}

系统注：本文被午夜听风加精.

X5045SpiSend()的一个变例(平时EEPROMSCK=1)(868字)hotpower[18次]2004-9-5 19:01:01
unsigned char X5045SpiSend(unsigned char val)
{
unsigned char i;
  ACC = val;
  for (i = 8; i > 0; i --)
  {
EEPROMSCK  = 0;//下降沿读入数据
_nop_();//延时
CY = EEPROMSO;//取数据SO
    _rlca_();//存数据ACC.0读数据ACC.7同时进行
EEPROMSI = CY;//送数据SI
_nop_();//延时
EEPROMSCK = 1;//上升沿打入数据
_nop_();//延时
EEPROMSI = 1;//释放总线SI
  }
  return ACC;
}