Hi I have ported a simple function from nRF51 to nRF52 which Outputs PWM coded Startup Diagnose Information via a GPIO. The Timing is generated by wait Loops and GPIO will be toggled by direct writing to OUTSET Register. I have noticed that the Timing is no longer precise on the nRF52. It seems, that writing to the OUTSET Register not always takes effect immediately. I guess it is an effect caused by the System bus write buffer.
Qustions: What is the correct way to force a GPIO to react immediately? I have tried the following to toggle the GPIO which seems to work:
- read OUTSET Register
- write OUTSET Register
- read OUTSET Register
Where can i get more Information about the System bus write buffer?
Thank you for help. Kind regards Paul
