error for transmitting i2c buffer

[max]

Hi.

i use 

i call  i2c_write() and if the buffer is large(8kB) i get error in i2c transfer -5.

i go deeply and found that it is due too error -11:

ret = k_sem_take(&(get_dev_data(dev)->completion_sync),
				 I2C_TRANSFER_TIMEOUT_MSEC)

If i step into this function and then run the code there is no errors and the code executed well.

Thanks for help.

[Øivind]

Hi,

My recommendation would be to write the data in multiple smaller pieces.

If that is not possible, you can try to edit the I2C_TRANSFER_TIMEOUT_MSEC parameter in zephyr/drivers/i2c/i2c_nrfx_twim.c to give the transfer more time to finish.

[max]

i can't use smaller pieces, i must transfer 8k in one shot. 
how can i config it? override ?

[Øivind]

Yes, if 8k is necessary. I2C_TRANSFER_TIMEOUT_MSEC is defined as K_MSEC(500) at the start of i2c_nrfx_twim.c. Try increasing the value such that the transfer has time to go through consistently.