ADS132A02-读取ADC转换数据失败

代码：ADC转换数据读取函数

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字节状态响应

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();

}

问题：我采用32位数据格式，禁用CRC和Hamming。初始化完成后，读取通道转换数据，总共12个字节(4字节状态响应，4字节通道1转换数据，4字节通道2转换数据)。为何读取的4字节状态为0X2274是正常的，而其余8字节通道数据为0呢？