CS5463的SPI串口问题求指教

只看该作者 · 2014-2-21 12:39

本帖最后由 sea1105 于 2014-2-21 12:46 编辑

STC单片机SPI查询的方式，CS5463驱动程序如下。试验中发现读取CS5463寄存器的默认值正确，但是CS5463初始化程序里的寄存器值却好像无法写入。用示波器检测SPI口波形无论读取都正常，很费解，请高手指点指点。

sbit  CS5463_CS = P1^4;
sbit  CS5463_RESET = P3^5;

#define Write_Reg       0x40

unsigned char SPI_swap(unsigned char dat)
{
      CS5463_CS = 0;             //pull low slave SS
      SPDAT = dat ;       //trigger SPI send
      while(!(SPSTAT & SPIF));          //wait send complete
      SPSTAT = SPIF | WCOL;             //clear SPI status
      CS5463_CS = 1;                               //push high slave SS

      return SPDAT;
}

void CS5463_Write(unsigned char *dat,unsigned char num)
{
      unsigned char i;

      for(i = 0;i < num;i++)
      {
            SPI_swap(*dat++);
      }
}

void CS5463_Read(unsigned char *dat,unsigned char reg)
{
      unsigned char i;

      SPI_swap(reg << 1);
      for(i = 0;i < 3;i++)
      {
            *dat++= SPI_swap(0xFE);
      }
}

void Clear_DRDY(void)
{
      unsigned char buf[4];

      buf[0] = (Config << 1) | Write_Reg;
      buf[1] = 0xFF;
      buf[2] = 0xFF;
      buf[3] = 0xFF;
      CS5463_Write(buf, 4);
}

void CS5463_Init(void)
{
      unsigned char buf[4];

      CS5463_RESET = 0;                            //复位CS5460
Delay_nms(5);                            //延迟5ms
CS5463_RESET = 1;
Delay_nms(5);                            //延迟5ms

//发送同步字节
      buf[0] = 0xFF;
      buf[1] = 0xFF;
      buf[2] = 0xFF;
      buf[3] = 0xFE;
      CS5463_Write(buf,4);

//写配置寄存器
      buf[0] = (Config << 1) | Write_Reg;
      buf[1] = 0x00;                         //电流增益设为10，相位偏移为默认值
      buf[2] = 0x00;
      buf[3] = 0x01;                //DCLK = MCLK / 1
      CS5463_Write(buf,4);

//写控制寄存器,缺省值
buf[0] = (Ctrl << 1) | Write_Reg;
buf[1] = 0x00;
buf[2] = 0x00;
buf[3] = 0x00;
CS5463_Write(buf,4);

//写周期计数寄存器N=4000
buf[0] = (CycleCount << 1) | Write_Reg;
buf[1] = 0x00;
buf[2] = 0x0F;
buf[3] = 0xA0;
CS5463_Write(buf,4);

//写中断屏蔽寄存器
buf[0] = (Mask << 1) | Write_Reg;
buf[1] = 0x80;                   //DRDY中断允许
buf[2] = 0x00;
buf[3] = 0x00;
CS5463_Write(buf,4);

//写能量-脉冲速率寄存器
      buf[0] = (PulseRate << 1) | Write_Reg;
      buf[1] = PulseConst >> 16;
      buf[2] = PulseConst >> 8;
      buf[3] = PulseConst;
      CS5463_Write(buf,4);

//写模式寄存器
buf[0] = (Mode << 1) | Write_Reg;
buf[1] = 0x00;
buf[2] = 0x00;                      //E2:Energy Sign
buf[3] = 0x61;                      //电压电流高通滤波器开启，IIR默认开启，E3:Reactive Power,AFC(频率测量) 开启
CS5463_Write(buf,4);

//写电压增益校准寄存器
//       buf[0] = (Vgn << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write(buf,4);

//写电压直流偏置校准寄存器
//       buf[0] = (VDCoff << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write(buf,4);

//写电流增益校准寄存器
//       buf[0] = (Ign << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write(buf,4);

//写电流直流偏置校准寄存器
//       buf[0] = (IDCoff << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write(buf,4);

//写电压交流偏置校准寄存器
//       buf[0] = (VACoff << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write( buf, 4 );

//写电流交流偏置校准寄存器
//       buf[0] = (IACoff << 1) | Write_Reg;
//       buf[1] = 0x;
//       buf[2] = 0x;
//       buf[3] = 0x;
//       CS5463_Write(buf, 4 );

//清状态寄存器
      buf[0] = (Status << 1) | Write_Reg;
      buf[1] = 0xFF;
      buf[2] = 0xFF;
      buf[3] = 0xFF;
      CS5463_Write(buf,4);

//启动转换
      buf[0] = 0xE8;
      CS5463_Write(buf,1);
}