Hi, I hope this is the right place to ask this.
I am trying to read data from a ADS7142 in manual mode dual channel-single ended.
Communication with the chip works just fine, but when the time comes to read the data, it only returns zeroes
Setup:
HAL_StatusTypeDef configure(I2C_HandleTypeDef *hi2c, uint8_t DeviceAddress) {
do {
HAL_StatusTypeDef buff = writeSingleRegister(hi2c, DeviceAddress,
REG_CHANNEL_INPUT_CFG, 0b00); //dual single ended
if (buff != HAL_OK) {
return buff;
}
} while (readSingleRegister(hi2c, DeviceAddress, REG_CHANNEL_INPUT_CFG)
!= 0b00);
do {
HAL_StatusTypeDef buff = writeSingleRegister(hi2c, DeviceAddress,
REG_OPMODE_SEL, 0b100); //Manual auto sequence
if (buff != HAL_OK) {
return buff;
}
} while (readSingleRegister(hi2c, DeviceAddress, REG_OPMODE_SEL) != 0b100);
do {
HAL_StatusTypeDef buff = writeSingleRegister(hi2c, DeviceAddress,
REG_AUTO_SEQ_CHEN, 0b11); //both channels
if (buff != HAL_OK) {
return buff;
}
} while (readSingleRegister(hi2c, DeviceAddress, REG_AUTO_SEQ_CHEN) != 0b11);
calibrateOffset(hi2c, DeviceAddress);
return HAL_OK;
}
Reading:
void Measure(I2C_HandleTypeDef *hi2c, uint8_t DeviceAddress,
uint16_t *RxBuffer) {
uint8_t intermediateBuffer[4];
setBit(hi2c, DeviceAddress, REG_START_SEQUENCE, 0x1); //start sequencing
HAL_I2C_Master_Receive(hi2c, DeviceAddress << 1, intermediateBuffer, 4,
100); //read data
//HAL_I2C_Master_Seq_Receive_DMA(hi2c, DeviceAddress<<1, intermediateBuffer, 4, );
setBit(hi2c, DeviceAddress, REG_ABORT_SEQUENCE, 0x1); //stop sequencing
RxBuffer[0] = intermediateBuffer[0] >> 4;
RxBuffer[0] = intermediateBuffer[1] >> 12;
RxBuffer[1] = intermediateBuffer[2] >> 4;
RxBuffer[1] = intermediateBuffer[3] >> 12;
}
I'm not sure what is going on here, the manual provides no conversion delay, it only talks about continuous SCL, is this possible on STM32 at all?
I thought it might be with I2C_Master_seq_recieve, but I don't get the I2C_XferOptions.
