VERIFY BUTTON CONNECTION

RE: VERIFY BUTTON CONNECTION

PCBindex — Fri, 31 Aug 2018 05:52:58 GMT

If I understood you correct this is the configuration:

P0.06 -- 10k resistor -- button -- VCC

With internal pull down on the input pin you will have a voltage divider which will lower the voltage to about half the voltage (internal pull down is about 13k). If this is the case you will never detect any change on the pin because the required voltage have to be 0.7 VDD to be valid high level. You should remove the 10k resistor in that case.

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RE: VERIFY BUTTON CONNECTION

MARTIN FR — Tue, 26 Apr 2016 10:45:30 GMT

Thank you so much for your suggestion could you please tell me what configuration do i need to make the button work in the software because in the NRF51DK button is connected to GND and pin 17 but in my custom board i have connected my button to vcc and pin 6 of the NRF51SOC i have tested my custom board it is making the pwm signal enable after press the button for 3 seconds and and if i did the smae configuration for my custom board it is enabling the PWM signal if i keep on the pressing the button once i released the button the pwm signal goes off immediately could you please check my source code

RE: VERIFY BUTTON CONNECTION

Ole Bauck — Fri, 22 Apr 2016 13:43:06 GMT

Have you initialized app_timer, started the LFCLK and enabled the buttons? See here for an example on using app_button.

RE: VERIFY BUTTON CONNECTION

MARTIN FR — Fri, 22 Apr 2016 13:23:55 GMT

I have removed the 10k resistor still when i press the button it is not getting detected and what else should i taken care of inorder to test the button functionality

RE: VERIFY BUTTON CONNECTION

MARTIN FR — Fri, 22 Apr 2016 12:11:36 GMT

Thank you so much for your kind reply so i have to remove the 10K resistror and configure the button lke this so i will do liek that

CUSTOM PCB button configuration: static app_button_cfg_t p_button[] = { {BP, APP_BUTTON_ACTIVE_HIGH,NRF_GPIO_PIN_PULLDOWN , button_handler}};

RE: VERIFY BUTTON CONNECTION

Ole Bauck — Fri, 22 Apr 2016 12:05:04 GMT

That will not work. If you remove the pull-down, the pin will float when the button is not pressed. The external 10k resistor should be removed. This resistor is unecessary and are just causing problems.

RE: VERIFY BUTTON CONNECTION

MARTIN FR — Fri, 22 Apr 2016 11:54:08 GMT

yes that is my configuration but is there is any possibility to remove the internal pull down instead of removing the external 10k resistor if it is possible please sugggest me some ideas can i do like that will it work instead of NRF_GPIO_PIN_PULLDOWN can i change that to NULL will it remove the internal pull down resistor or i shoud remove only the 10k resistor

static app_button_cfg_t p_button[] = { {BP, APP_BUTTON_ACTIVE_HIGH,NULL , button_handler}};

RE: VERIFY BUTTON CONNECTION

Ole Bauck — Fri, 22 Apr 2016 11:43:22 GMT

If I understood you correct this is the configuration:

P0.06 -- 10k resistor -- button -- VCC