LP-MSPM0G3507: TMAG3001

Hi, thanks for the question! As far as the I2C goes, there are many examples in the CCS MSPM0 SDK for both controller mode as well as peripheral mode. Assuming you have gone through the TMAG3001 datasheet and set all of your configurations to your specific use case, you should be able to send a read request to the TMAG like this:

#define I2C_TX_PACKET_SIZE (2)

#define I2C_RX_PACKET_SIZE (6)

#define I2C_TARGET_ADDRESS (0x??)

gTxPacket[2] = [0x12, ......] ; // register of x axis MSB

gRxPacket[6];  // assuming you are going to read all 6 registers of MSB/LSB for all axes

DL_I2C_fillControllerTXFIFO(I2C_INST, &gTxPacket[0], I2C_TX_PACKET_SIZE);

DL_I2C_startControllerTransfer(I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, I2C_RX_PACKET_SIZE);

for (uint8_t i = 0; i < I2C_RX_PACKET_SIZE; i++) {
    while (DL_I2C_isControllerRXFIFOEmpty(I2C_INST))
           ;
    gRxPacket[i] = DL_I2C_receiveControllerData(I2C_INST);
}

I am using the i2c_controller_rw_multibyte_fifo_poll as an example, but you can choose another to best suit your needs. Hope this helps!

So this should be similar to the read, you will need to have the address of the register you are writing/configuring, so something like this:

The specifics for the config registers is more of an OPT3001 question, but this is one way to write to the registers. Hope this helps!