GPIO set time

RE: GPIO set time

Øyvind Karlsen — Wed, 06 Jul 2016 05:56:53 GMT

The minimum time for GPIO toggling depends on the load capacitance (higher capacitance higher rise/fall time), the values are on a nanosecond scale and can be found in the electrical specification for the GPIO module.

RE: GPIO set time

RK — Tue, 05 Jul 2016 16:23:03 GMT

if you're using a PCA10040 dev kit not only do you have to enable the pins as GPIOs, you have to remove two resistors and add two other resistors as the GPIO pins on the board aren't actually connected until you do.

RE: GPIO set time

Wojtek — Tue, 05 Jul 2016 13:47:54 GMT

how do you enable it? did you try using another pin? Just to make sure that the problem is elsewhere. 1us toggling should be easily achieved.

RE: GPIO set time

Thangaraj — Tue, 05 Jul 2016 13:45:51 GMT

Hi Sorry, It is enabled as GPIO

RE: GPIO set time

Wojtek — Tue, 05 Jul 2016 13:40:49 GMT

If you have register NFCPINS enabled (i understand enabled = 1), then you cant use it as gpio...