ADS1147: CC2640R2F

Hi Navod Rajapaki,

I'm not really sure what is being asked here, so you might need to provide additional clarification to your questions.

The SCLK signal is provided to the ADC's SCLK pin from the controller. SCLK is the Serial Clock, and as its name implies this is the clock that the serial communication uses for timing. DIN is the Data Input pin, so your controller sends commands (Read reg, write reg, read data, etc.) to this pin to be able to control the ADC.

I would strongly encourage you to completely read the ADS1147 datasheet before posting additional questions, many of the answers are already included in this document

We typically do not review third-party code. There is example code for the ADS114x (16-bit) and ADS124x (24-bit) devices on TI.com: https://www.ti.com/lit/zip/sbac144

-Bryan

how to send 16 SCLK for ADS1147?.pluse duration is 366ns.i didn't understand your reply. I used CC2640R2 board.

Hi Navod Rajapaki,

SCLK is signal that is sent by the controller, so the first thing you need to do is set up the SPI peripheral in the controller (CC2640R2).

There is a separate support forum for MCUs if you need help with the CC2640R2: https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum

-Bryan

Hi Bryan Lizon86,

I already set up the SPI peripheral in the controller and send 16 SCLK using SPI but I haven't come expected result. Following code is used.

void SCLK_16_command()
{

/* Call driver init functions */
SPI_init();

SPI_Handle handle;
SPI_Params params;
SPI_Transaction transaction;
uint32_t txBuf[] = {0b010101010101010101010101010101010}; // 16 SCLKs

// Init SPI and specify non-default parameters
SPI_Params_init(&params);
params.bitRate = 2700000;
params.frameFormat = SPI_POL0_PHA1;
params.mode = SPI_MASTER;

// Configure the transaction
transaction.count = sizeof(txBuf);
transaction.txBuf = txBuf;
transaction.rxBuf = NULL;

// Open the SPI and perform the transfer
handle = SPI_open(CC2640R2_LAUNCHXL_SPI1, &params);

SPI_transfer(handle, &transaction);

SPI_close(handle);

}

//checking whether DRDY(MISO pin as Data ready connected) is high

while(DRDY==1){

Task_sleep (0.01 * (1000 / Clock_tickPeriod));
RDATA_command();
SCLK_16_command();
usleep(1.7);

}

The below picture indicated Clock signal.

Why its not continuing the 32 bit clock cycle either giving delay after a 8 bits.i want to clean that delay and give a 32 bit continuously.

please answer to my question directly either sending links.