AT91RM9200对时钟芯片HT1380进行读写操作源码

使用AT91RM9200对时钟芯片HT1380进行读写操作源码(gliethttp)
//---------------------------------------------------------------------------------------------------------------------
typedef struct __xHT1380
{
  #define XHT1380_Install() AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, 0x0f);AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_PIOA)
  #define XHT1380_sclk_Set() AT91F_PIO_SetOutput(AT91C_BASE_PIOA, 0x01 << 2)
  #define XHT1380_rst_Set() AT91F_PIO_SetOutput(AT91C_BASE_PIOA, 0x01 << 3)
  #define XHT1380_io_Set() AT91F_PIO_SetOutput(AT91C_BASE_PIOA, 0x03 << 0)

  #define XHT1380_sclk_Clr() AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, 0x01 << 2)
  #define XHT1380_rst_Clr() AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, 0x01 << 3)
  #define XHT1380_io_Clr() AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, 0x03 << 0)

  #define xHT1380_io_IN()  AT91F_PIO_CfgInput(AT91C_BASE_PIOA,0x03 << 0)
  #define xHT1380_io_OUT() AT91F_PIO_CfgOutput(AT91C_BASE_PIOA,0x03 << 0)
  #define xHT1380_io_Get() (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & 0x03)
//public
 void(*ini)(void);
 void(*start)(void);//启动HT1380
 void(*saveTime)(_xtime *time);
 void(*readTime)(_xtime *time);
 boolean ok;
}_xHT1380;
__inline void HT1380_OUT(uint8 data)
{uint8 i;
   for(i = 0;i < 8;i++)
   {
      if(data & 0x01)XHT1380_io_Set();
      else XHT1380_io_Clr();
      data >>= 1;
      XHT1380_sclk_Set();
      XHT1380_sclk_Clr();
   }
}
__inline uint8 HT1380_IN(void)
{uint8 i;
 uint8 data = 0;
   for(i = 0;i < 8;i++)
   {
      XHT1380_sclk_Set();
      data >>= 1;
      if(xHT1380_io_Get())data |= 0x80;
      XHT1380_sclk_Clr();
   }
   return data;
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_ini(void);
_xHT1380 xxHT1380 = {xHT1380_ini};
_xHT1380 *xHT1380 = &xxHT1380;
//---------------------------------------------------------------------------------------------------------------------
//【  版          本  】v1.0
//【  函  数  名  称  】void xHT1380_write(void)
//【 创建人及创建时间  】gliethttp 2006-06-28 15:18
//【 修改人及修改时间  】
//【  修  改  原  因  】
//【  功  能  描  述  】3V电压，所以时钟频率应该小于700K
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_write(uint8 cmd,uint8 data)
{
   xHT1380_io_OUT();
   XHT1380_sclk_Clr();
   XHT1380_rst_Clr();
   XHT1380_rst_Set();
   HT1380_OUT(cmd);
   HT1380_OUT(data);
   XHT1380_rst_Clr();
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_read(uint8 cmd,uint8 *data)
{
   XHT1380_sclk_Clr();
   XHT1380_rst_Clr();
   xHT1380_io_OUT();
   XHT1380_rst_Set();
   HT1380_OUT(cmd);
   xHT1380_io_IN();
   *data = HT1380_IN();
   XHT1380_rst_Clr();
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_start(void)
{
   xHT1380_write(0x8E,0x00);//允许写
   xHT1380_write(0x80,0x00);//允许晶振
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_saveTime(_xtime *time)
{uint8 data;
   data = ((time->second / 10) << 4) + (time->second % 10);
   xHT1380_write(0x80,data);
   data = ((time->minute / 10) << 4) + (time->minute % 10);
   xHT1380_write(0x82,data);
   //data = (time->hour % 12);
   //if(time->hour >= 12)data |= 0x20;
   data = ((time->hour / 10) << 4) + (time->hour % 10);
   xHT1380_write(0x84,data);
   data = ((time->day / 10) << 4) + (time->day % 10);
   xHT1380_write(0x86,data);
   data = ((time->month / 10) << 4) + (time->month % 10);
   xHT1380_write(0x88,data);
   data = ((time->year / 10) << 4) + (time->year % 10);
   xHT1380_write(0x8C,data);
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_readTime(_xtime *time)
{//假设能在1s内读完这些数据
   xHT1380_read(0x81,&time->second);
   xHT1380_read(0x83,&time->minute);
   xHT1380_read(0x85,&time->hour);
   xHT1380_read(0x87,&time->day);
   xHT1380_read(0x89,&time->month);
   xHT1380_read(0x8D,&time->year);
}
//---------------------------------------------------------------------------------------------------------------------
void xHT1380_ini(void)
{uint8 data,data0;
   XHT1380_Install();
   XHT1380_sclk_Set();
   XHT1380_rst_Set();
   XHT1380_io_Set();
   xHT1380->start = xHT1380_start;
   xHT1380->saveTime = xHT1380_saveTime;
   xHT1380->readTime = xHT1380_readTime;
   xHT1380_read(0x81,&data);
   xHT1380_read(0x8F,&data0);
   if(data0 & 0x80)data |= 0x80;
   if(data & 0x80)xHT1380->start();//表示新的HT1380，需要启动晶振
   xHT1380_read(0x81,&data);
   if(data & 0x80)xHT1380->ok = false;//更换RTC电池
   else xHT1380->ok = true;  //HT1380已经正常工作
}