ICM-20948 driver firmware upload fails.

Hi,

I just was working through the same problem. I used information found in this post: https://www.invensense.com/developers/forums/topic/icm-20948-dmp-flash-error-2/ Particularly I used a different write sequence (and ic library) which Dingari had modified in the following github location: https://github.com/jrowberg/i2cdevlib/pull/360

The code I used was the following (note that this is for a nRF based device).

/** Read single byte from an -bit device register.

 * @param devAddr IC slave device address

 * @param regAddr Register regAddr to read from

 * @param data Container for byte value read from device

 * @param timeout Optional read timeout in milliseconds ( to disable, leave off to use default class value in ICdev::readTimeout)

 * @return Status of read operation (true = success)

 */

int_t ICdev::readByte(uint_t devAddr, uint_t regAddr, uint_t *data, uint_t timeout) {

    return readBytes(devAddr, regAddr, , data, timeout);

}
/** Read multiple bytes from an -bit device register.

 * @param devAddr IC slave device address

 * @param regAddr First register regAddr to read from

 * @param length Number of bytes to read

 * @param data Buffer to store read data in

 * @param timeout Optional read timeout in milliseconds ( to disable, leave off to use default class value in ICdev::readTimeout)

 * @return IC_TransferReturn_TypeDef http://downloads.energymicro.com/documentation/doxygen/group__IC.html

 */

int_t ICdev::readBytes(uint_t devAddr, uint_t regAddr, uint_t length, uint_t *data, uint_t timeout) {
            //bool transfer_succeeded;

	    nrf_drv_twi_tx(&m_twi,devAddr,®Addr,,false);

            //transfer_succeeded  = twi_master_transfer(m_device_address, ®ister_address, , TWI_DONT_ISSUE_STOP);
	    ret_code_t r= nrf_drv_twi_rx(&m_twi,devAddr,data,length);
	    //transfer_succeeded &= twi_master_transfer(m_device_address|TWI_READ_BIT, destination, number_of_bytes, TWI_ISSUE_STOP);

	    return r==NRF_SUCCESS;              

  

}
/** Write multiple bytes to an -bit device register.

 * @param devAddr IC slave device address

 * @param regAddr First register address to write to

 * @param length Number of bytes to write

 * @param data Buffer to copy new data from

 * @return Status of operation (true = success)

 */

bool ICdev::writeBytes(uint_t devAddr, uint_t regAddr, uint_t length, const uint_t* data) {

    

    const uint_t buf_len = length+; // Register address + number of bytes

    uint_t tx_buf[buf_len];
    tx_buf[] = regAddr;

        

    memcpy(tx_buf+, data, length);
    return NRF_SUCCESS == nrf_drv_twi_tx(&m_twi, devAddr, tx_buf, buf_len, true); 

    

}