RE: I use PWM only one channel is effective.this is my code

Ryon_pan — Fri, 14 Dec 2018 05:45:34 GMT

thank you very nuch.the reason it doesn't work is that pins 09 and 10 are reserved for the NFC

RE: I use PWM only one channel is effective.this is my code

Edvin — Wed, 12 Dec 2018 13:54:44 GMT

Hello,

I tested your application by changing the pins to 17, 18 and 19, in order to see it on the LEDs on the DK. It worked fine there.

The reason it doesn't work (only the blue LED works) is that pins 09 and 10 are reserved for the NFC antenna.

If you want to use the NFC pins as GPIOs, you must define CONFIG_NFCT_PINS_AS_GPIOS in your preprocessor defines. Please note that you have to have this define, compile, flash, and then power cycle your nRF in order for it to take effect.

In addition, if you use an nRF52 DK, the pins 09 and 10 are not connected to the pinout by default. In order to connect them, you must add a R0 on R28 and R27 (insert a 0 Ohm capacitor, or solder the pads on each of this resistor placeholders together).

If you use a DK, it is probably easier to use different pins, if you have any available.

The setup description on how to prepare these pins as normal GPIOs is described here.

Best regards,

Edvin

RE: I use PWM only one channel is effective.this is my code

awneil — Tue, 11 Dec 2018 08:37:41 GMT

How to properly post source code: