https://devzone.nordicsemi.com/f/nordic-q-a/29204/how-to-drive-bma223-sensor-by-nrf52832-twiI used NRF52832 TWI master to drive BMA223 sensor, a. gs.c/gs.h are the driver codes b. the i2c wave is looks right, but there still not generates a NRF_DRV_TWI_EVT_DONE event c. so sinks into while(!this_done) Who can help me? Thanks! en-USTelligent Community 13Thu, 04 Jan 2018 12:11:59 GMThttps://devzone.nordicsemi.com/thread/116153?ContentTypeID=1Thu, 04 Jan 2018 12:11:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f75c71f-8bf0-4871-ac08-11e278a4724aJ&#248;rgen Holmefjord<p>You should check the return values from your calls to nrf_drv_twi_* functions. I would also recommend you to check the return values using APP_ERROR_CHECK(), and follow this debugging method to see if any errors are reported. Have you tried setting a breakpoint in the event handler, to see if it is called at all? Are you using softdevice in your application, and have initialized this before calling <code>sd_app_evt_wait()</code>? In your call to <code>nrf_drv_twi_tx()</code> you have set the <code>no_stop</code> parameter to false, but the datasheet seems to not expect a stop condition between tx and rx in a read operation. Have you tried setting this to true?</p><div style="clear:both;"></div>