nrf_drv_twi_tx twi softdevice s110 problem

RE: nrf_drv_twi_tx twi softdevice s110 problem

MartinBL — Fri, 24 Nov 2017 12:47:01 GMT

Shooting from the hip here, but it could be similar to this case (or the cases linked to within it). If that is not the case I think you should open a new thread, and maybe post some of you code.

RE: nrf_drv_twi_tx twi softdevice s110 problem

AndrewJ — Fri, 24 Nov 2017 06:59:49 GMT

Hi Martin, Justin. We are facing the exact same problem here (using nRF5_SDK_12.3.0). When I have no softdevice, I can call nrf_drv_twi_tx() and talk to my sensor, but with softdevice enabled, the call to nrf_drv_twi_tx() will hang forever. Was there any resolution to this thread?

RE: nrf_drv_twi_tx twi softdevice s110 problem

justin chang — Thu, 24 Mar 2016 02:59:54 GMT

hi, thanks for answer. yes, i tried to running twi example without softdevice and got right return values. it still doesn't work with softdevice. it seems reset when execute nrf_drv_twi_tx() with softdevice. i have two leds, so i tested that led1 blinks when tx_done and led2 blinks when rx_done in twi_handler without softdevice. i checked with ocillator, scl and sda are fine without softdevice but it doesn't with softdevice. it doesn't show any waves. is there any common trouble issue for twi with softdevice?

RE: nrf_drv_twi_tx twi softdevice s110 problem

MartinBL — Mon, 21 Mar 2016 13:49:11 GMT

Hi.

Have you tried to communicate with your device without the SoftDevice running?
Are you sure the address is correct and that you are supposed to right shift it?
Have you checked for errors returned from the TWI drivers? You can check p_event->type for NRF_DRV_TWI_ERROR as well as NRF_DRV_TWI_RX_DONE and NRF_DRV_TWI_TX_DONE. If you don't use a TWI handler then the TWI drivers will operate in blocking mode meaning that your code will get stuck if you try to transmit something on the TWI bus and something goes wrong.
Here is a simple example for debugging a TWI application.