请教ad7793或ltc2400方面的问题！

只看该作者 · 2014-3-25 16:51

各位达人们，本人新新手一个，有谁有ad7793或ltc2400这类24位ad芯片的 51单片机汇编语言程序吗，能否给我参考一下。在此先谢谢位了！

-4 · 2014-3-25 17:53

void AD7793_GPIO_Config(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_5;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4  | GPIO_Pin_6 | GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
      AD7793_CS_SET();

}

void WriteToReg(unsigned char ByteData)
{
      unsigned char temp;
      unsigned char i;
      AD7793_CS_CLR();
      temp=0x80;
      for(i=0;i<8;i++)
      {
            if((temp & ByteData)==0)
            {
                     AD7793_DIN_CLR();
            }
            else
            {
                     AD7793_DIN_SET();
            }
            AD7793_SCLK_CLR();
            Delay(200);
            AD7793_SCLK_SET();
            Delay(200);
            temp=temp>>1;
      }
      AD7793_CS_SET();
}

void AD7793_Reset(void)       //复位AD7793
{
      unsigned int ResetTime;

      ResetTime=32;
      AD7793_SCLK_SET();

      AD7793_CS_CLR();
      AD7793_DIN_SET();
      while(ResetTime--)
      {
            WriteToReg(0xff);
            Delay(100);
            AD7793_SCLK_CLR();
            Delay(100);
            AD7793_SCLK_SET();
      }
      AD7793_CS_SET();
}

unsigned char AD7793_ReadStatusRegister(void) //读状态寄存器
{
      unsigned char j;
      unsigned char temp;

      WriteToReg(0x40);

      AD7793_DIN_SET();
      AD7793_CS_CLR();
      temp=0;
      AD7793_DOUT_SET()

            for(j=0; j<8; j++)
            {
                     AD7793_SCLK_CLR();
                     AD7793_DOUT_SET()
                              if(AD7793_DOUT_GET()==0)
                              {
                                    temp=temp<<1;
                              }else
                              {
                                    temp=temp<<1;
                                    temp=temp+0x01;
                              }
                              Delay(200);
                              AD7793_SCLK_SET();
                              Delay(200);
            }
            AD7793_CS_SET();

            return temp;
}
void Ad7793_WriteModeRegister(unsigned char ModeRegisterH,unsigned char ModeRegisterL)       //写模式寄存器
{
      WriteToReg(0x08);
      WriteToReg(ModeRegisterH);
      WriteToReg(ModeRegisterL);
}

void Ad7793_WriteConfigRegister(unsigned char ConfigRegisterH,unsigned char ConfigRegisterL) //写配置寄存器
{
      WriteToReg(0x10);
      WriteToReg(ConfigRegisterH);
      WriteToReg(ConfigRegisterL);
}

void Ad7793_WriteIORegister(unsigned char IORegister)  //写IO寄存器
{
      WriteToReg(0x28);
      WriteToReg(IORegister);
}

long AD7793_ReadDataRegister(void) //读数据寄存器
{
      union long_4uchar AD7793Result;
      unsigned char i,j;
      unsigned char temp;

      temp=AD7793_ReadStatusRegister();
      while((temp&0x80)==0x80)
      {
            temp=AD7793_ReadStatusRegister();

      }

      WriteToReg(0x58);

      AD7793_DIN_SET();
      AD7793_CS_CLR();
      AD7793_DOUT_SET()

            for(i=0; i<3; i++)
            {
                     for(j=0; j<8; j++)
                     {
                              AD7793_SCLK_CLR();
                              AD7793_DOUT_SET()
                                    if(AD7793_DOUT_GET()==0)
                                    {
                                             temp=temp<<1;
                                    }else
                                    {
                                             temp=temp<<1;
                                             temp=temp+0x01;
                                    }
                                    Delay(200);
                                    AD7793_SCLK_SET();
                                    Delay(200);
                     }
                     AD7793Result._4byte._uchar[3-i]=temp;
            }
            AD7793_CS_SET();

            AD7793Result._long=AD7793Result._long>>17;
            return AD7793Result._long;
}

void Init_AD7793(void)
{
      AD7793_GPIO_Config();
      AD7793_Reset();
      Ad7793_WriteModeRegister(0x00,0x0a);
      Ad7793_WriteConfigRegister(0x1A,0x10);
      Ad7793_WriteIORegister(0x03);
}
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