nrf_drv_twi_tx return error 0x10

[Fabien Comte]

Hello,

I have this code

if (NRF_SUCCESS!=nrf_drv_twi_tx(&m_twi,devAddr,&regAddr,1,true))
		return false;
		
	unsigned int err_code = nrf_drv_twi_tx(&m_twi,devAddr,data,length,false);

and the second nrf_drv_twi_tx returns error 0x10 with devAddr = 0x69 regAddr = 0x6F length = 0x01

I have a lot of writes before work correctly but this one always fails.

I am on nRF52 with SDK 11 alpha.

[MartinBL]

Hi

Are you trying to transmit data stored in flash? If you look at the definition of nrf_drv_twi_tx() you will see that it calls nrf_drv_twi_xfer(), which in turn calls twim_xfer(). The last function will return 0x10 (aka NRF_ERROR_INVALID_ADDR Bad "Memory Address") if the data you are trying to send is not stored in RAM.

[Fabien Comte]

You are correct, MPU 9250 driver use flash as firmware source directly for I2C write. You have to copy chunks in RAM for I2C write (inv_mpu.c) Thank you.