I'm trying to use nRF52 twi with the MPU 9250, I consistently get NACK responses from the 9250. I have the 9250 working with an Arduino.
The function I'm trying to use to transfer using twi is nrf_drv_twi_tx.
When using a logic analyzer on the nRF52 the start condition doesn't quite look right, SDA seems to go high at the same time as SCL goes low in the TWI start condition. I compared this to the Arduino start condition and the timing looks a little different.
Is there a way to lengthen the timing of the start condition for twi transfers? Below is the logic analyzer diagram.
