关于ADS122C04的咨询

haijun Jiang

Other Parts Discussed in Thread: ADS122C04, ADS1220

ADS122C04 寄存器配置可以正确读写，但是读取数据的时候，读出的数据全都是0，代码如下：

寄存器配置值为：static uint8_t C_ADS1220_Par_Default_W[4] = {0x91,0x08,0x00,0x00};

uint32_t ADS122C_GetData(void)
{
uint8_t ret;
uint32_t L_ADS122C_Data = 0;
uint32_t L_ADS122C_Buf[N];

ADS122C_DRDY();

ret = ADS122C_Config_Init();

if(ret == 1)
{

ADS122C_StartConversion();

for(uint8_t i = 0; i < N; i++)
{

while(ADS122CDRDY_IN);

delay_ms(10);

ADS122C_Read_Data(&L_ADS122C_Buf[i]);

}

for(uint8_t i = 0; i < N; i++)
{

L_ADS122C_Data += L_ADS122C_Buf[i];

}

L_ADS122C_Data = (uint32_t)(L_ADS122C_Data / N);//取平均值

}
else
{
//异常
L_ADS122C_Data = 0;
}

ADS122C_PowerDown();

return L_ADS122C_Data;
}

请问是为什么呢？

7 年多前

0 haijun Jiang 7 年多前

Prodigy 130 points

//读取AD1220转换数据
uint8_t ADS122C_Read_Data(uint32_t *R_Data)
{
uint32_t l_Data = 0;

if(!I2C_Start())
return HAL_I2C_ERROR_TIMEOUT;

I2C_SendByte((ADS122C_ADDR_WRITE));//写器件地址

if(!I2C_WaitAck())
{
I2C_Stop();
return HAL_I2C_ERROR_TIMEOUT;
}

I2C_SendByte((ADS122CREG_DATA));//写器件地址

if(!I2C_WaitAck())
{
I2C_Stop();
return HAL_I2C_ERROR_TIMEOUT;
}

I2C_Stop();

if(!I2C_Start())
return HAL_I2C_ERROR_TIMEOUT;

I2C_SendByte(ADS122C_ADDR_READ); //读器件地址

if(!I2C_WaitAck())
{
I2C_Stop();
return HAL_I2C_ERROR_TIMEOUT;
}

l_Data = I2C_ReceiveByte();

I2C_Ack();

l_Data = (l_Data<<8) | I2C_ReceiveByte();

I2C_Ack();

l_Data = (l_Data<<8) | I2C_ReceiveByte();

I2C_NoAck();

I2C_Stop();

*R_Data = l_Data;

return HAL_I2C_ERROR_NONE;
}