x5045.c

一个用到ZLG7289的实际项目

#include <x5045.h> 
/*--------------------------------------
不打开dog
--------------------------------------*/
void X5045Init(void)
{
	EEPROMCS   = 1;
	EEPROMSI   = 1;
	EEPROMSO   = 1;
	EEPROMSCK  = 0;
	X5045WriteStatus(0x30);
}
/*--------------------------------------
     打开X5045片选
--------------------------------------*/
void X5045SpiOpen(void)
{
  EEPROMCS    = 1;//WDT
  EEPROMSCK   = 0;
  EEPROMSI   = 1;//SO=SI=1,释放总线
  EEPROMSO   = 1;
  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
  EEPROMSI   = 1;//SO=SI=1,释放总线
  EEPROMSO   = 1;
  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;
  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
}




/*--------------------------------------
    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
}