ADS131A02: ADS131A02-Failed to read ADC conversion data

Part Number: ADS131A02
Other Parts Discussed in Thread: ADS131A04, , ADS131A04EVM

Hi Team,

The customer is experiencing below issue and needs your help.

Code: ADC conversion data read function

void Read_ADC_Data(uint8_t *pBuffer, uint8_t Num_Byte)

{

uint8_t channel_1,channel_2;

uint32_t receive_status;

ADS_DRDY_LOW();

SPI2_CS_LOW();

receive_status =  (uint32_t) ADS131A02_Write_CMD(ADS_CMD_NULL);

pBuffer[0] = (uint8_t ) (receive_status>>24);// 4-byte status response

pBuffer[1] = (uint8_t ) (receive_status>>16);

pBuffer[2] = (uint8_t ) (receive_status>>8);

pBuffer[3] = (uint8_t ) (receive_status&0X0000FFFF);

for(channel_1=4; channel_1<(Num_Byte-4); channel_1++)  pBuffer[channel_1] = SPI2_Write_Read(0X00);

for(channel_2=8; channel_2<Num_Byte; channel_2++)  pBuffer[channel_2] = SPI2_Write_Read(0X00);

delay_ms(1);

SPI2_CS_HIGH();

ADS_DRDY_HIGH();

}

Question: Customer is using a 32-bit data format with CRC and Hamming disabled. After the initialization is completed, the channel conversion data is read. Totally there are12 bytes (4-byte status response, 4-byte channel 1 conversion data, 4-byte channel 2 conversion data). Why is the 4 bytes of the status 0X2274 normal, and the remaining 8 bytes of channel data is 0?

Thanks.