About ADS1271

Hi Vijay,

I'm not sure what sort of sample code we might have for the ADS1271 - I'll check.  We do have code examples for the ADS1274 and ADS1278 though.  Attached is a Code Composer Studio project for the TMS320C5510 and the ADS1274 which you might find useful.

2677.ADS1274-DSK5510-CCS3v1.zip

Hi Tom,

       Thank you for your valuable reply. 

We are using the LPC2368  ARM7 processor for our application. We are using the polling method for Reading the ADC count. We are using the SPI interfacing and High speed mode. We are presently using the single ended input. MCLK =  1Mhz. But the ADC counts are drastically varying.

Here, we are posting our code for ADS1271. Please check it. whether the code flow is correct or not?

signed long int Read_ADCA_Count(void)
{
    unsigned char i,NegativePol = 0;
    signed long int AdcCount=0;
    Read_ADCA_DRDY = Read_ADCA_DRDY_Func();    //Read DRDY pin status
    while(Read_ADCA_DRDY ==1)
    {
        Read_ADCA_DRDY = Read_ADCA_DRDY_Func(); //It will stay in loop upto DRDY goes low.
    }
               
    for(i=0;i<24;i++)    //After that We have to read the 24 bit data
    {
        /*  During the falling edge we have to read the data  */            
        ADCA_CLK_SET
        ADCA_SclkDelay(400);   //Delay approximately 75 micro seconds.
        ADCA_CLK_CLR
        ADCA_SclkDelay(200);
        Read_ADCA_SDO = Read_ADCA_SDO_Func();    //Read the DOUT pin status
        if((Read_ADCA_SDO == 1) && (i ==0 ))    //MSB bit is uesd to check the polarity
               NegativePol = 1;
        else
        {
            if(Read_ADCA_SDO != 0)
                    AdcCount |=1;
               else
                    AdcCount |=0;
        }
        ADCA_SclkDelay(200);
        
                                 
        if(i<23)
            AdcCount<<=1;
    }
    if(NegativePol)     // For negative sign indication with apropriate calculation.
    {        
        AdcCount = 0x7FFFFF - AdcCount;    // 23 bit
        AdcCount = AdcCount * (-1);        
    }    
    return(AdcCount/64);    // We used only 17 bit for desired application.
}  

Regards,

Vijay.

Hi vijay,

  Did your code works,i to trying in same application.

Regards

Raj

Raj,

No, we are suffering the ADC fluctuation problem and also we are missing some data bits.

Regards,

Vijay

vijay

  send me code the of ADS part.we to did't get the output.

Regards

Raj