RE: Handling ret_code_t errors (SDK14.2)

Jørgen Holmefjord — Wed, 21 Feb 2018 11:15:34 GMT

Hi,

Error code 0x8201 means NRF_ERROR_DRV_TWI_ERR_ANACK, and the possible return codes from the function call is given in the function API docuementation. I'm not sure what you mean by "Should I mask the return code and check the LSB only?". Why would you mask out part of the error code?

Not all error codes are non-recoverable. You need to decide this when you write your application. If it is acceptable in your application to for instance get an address NACK, you can mask out these errors while passing the rest of the error codes to APP_ERROR_CHECK(), using a if-check:

ret_code_t err_code = nrf_drv_twi_tx(....);
if(err_code != NRF_ERROR_DRV_TWI_ERR_ANACK)
{
    APP_ERROR_CHECK(err_code);
}

There is no need to reset the device, This is just the default recovery method used in the SDK. You can write your own app_error_fault_handler function, that will handle all general error codes based on your opinion of the seriousness/recoverability.

Best regards,
Jørgen