"app_button" functions doesn't work on XL1 gpio "P0.00"

[Hugo]

Hello,

On my custom board, on nrf52832, I can can use app_buttons for all usual pins, but not the XL1 (P0.00). I didn't try XL2 (not routed)

Using this pin as input or output works fine with standard functions.  I use sdk15.2, with softdevice s132, and didnt't try without it (I'm not sure it would help, and anyway I need the softdevice)

As I'm not using the 32kHz crystal, I set my sdk_config with:

#define NRFX_CLOCK_CONFIG_LF_SRC 0
#define CLOCK_CONFIG_LF_SRC 0

#define NRF_SDH_CLOCK_LF_SRC 0

Do you have some idea?

I guess is might need some interuption configuration.

[Vidar Berg]

Hello,

There shouldn't be any restrictions on P0.00 as long as you use the internal RC. Are you using the same button/IO configuration for all the pins you test with and do you have pull up/down enabled so that isn't floating? 

[Hugo]

I'm using 5 buttons(P0.28 P0.30,P0.00,P0.02,P0.03). Code is working for the 4 other buttons. Defining the button "P0.00" to pin P0.31 (a sixth button no defined at all yet anywhere in the code), works very fine.


This is my code:

nrf_gpio_cfg_input (0,NRF_GPIO_PIN_PULLUP);
//! if you want more buttons, change value GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS in sdk_config.h
static app_button_cfg_t p_button[] = {  {BUTTON_1, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_2, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_3, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_4, APP_BUTTON_RELEASE, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_5, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler}};

    app_button_init(p_button,sizeof(p_button) / sizeof(p_button[0]),100);
    app_button_enable();

By making this new test, one more info: I'm using internal pull-up. This pull up is not active.and in it I specify the pin 0 as input pull up, so the app_button_init seems to erase this setting.
If I change to P0.31, the pull-up works great on P0.00
At last, even if the pull up is not active, connecting the pin to the ground or VCC does not call an handler.

[Vidar Berg]

Is BUTTON_PULL defined as "pull up" in your board header? In that case I don't see why app_button_init would clear this setting. Could you upload your project here so I can try to replicate it? Also if you could verify that NRF_GPIO->PIN_CNF[0].SENSE is not '0' after app_button_enable(). 

[Hugo]

Hi Vidar,

Thanks for your help.

of course:

#define BUTTON_PULL    NRF_GPIO_PIN_PULLUP

Also, NRF_GPIO->PIN_CNF[0].SENSE doesn't exist. NRF_GPIO->PIN_CNF[PIN] is an integer. this is what I get (button 0 is 0):

    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[0] %d",NRF_GPIO->PIN_CNF[0]);
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[BUTTON_1] %d",NRF_GPIO->PIN_CNF[BUTTON_1]);
     	nrf_gpio_cfg_input (0,NRF_GPIO_PIN_PULLUP);
//! if you want more buttons, change value GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS in sdk_config.h
    static app_button_cfg_t p_button[] = {  {BUTTON_0, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_1, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_2, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_3, APP_BUTTON_RELEASE, BUTTON_PULL, button_pressed_handler},
                                            {BUTTON_4, APP_BUTTON_PUSH, BUTTON_PULL, button_pressed_handler}};

    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[0] %d",NRF_GPIO->PIN_CNF[0]);
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[BUTTON_1] %d",NRF_GPIO->PIN_CNF[BUTTON_1]);
    app_button_init(p_button,sizeof(p_button) / sizeof(p_button[0]),100);
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[0] %d",NRF_GPIO->PIN_CNF[0]);
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[BUTTON_1] %d",NRF_GPIO->PIN_CNF[BUTTON_1]);
    app_button_enable();
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[0] %d",NRF_GPIO->PIN_CNF[0]);
    NRF_LOG_INFO("NRF_GPIO->PIN_CNF[BUTTON_1] %d",NRF_GPIO->PIN_CNF[BUTTON_1]);

and its log:

<info> app: NRF_GPIO->PIN_CNF[0] 2
<info> app: NRF_GPIO->PIN_CNF[BUTTON_1] 2
<info> app: NRF_GPIO->PIN_CNF[0] 12
<info> app: NRF_GPIO->PIN_CNF[BUTTON_1] 2
<info> app: NRF_GPIO->PIN_CNF[0] 12
<info> app: NRF_GPIO->PIN_CNF[BUTTON_1] 12
<info> app: NRF_GPIO->PIN_CNF[0] 196620
<info> app: NRF_GPIO->PIN_CNF[BUTTON_1] 196620

I'm sorry, I cannot give you my code. I tryed with no success to make a standalone app_button example. (it seems complicated with timers, clock, etc...). But you have all the interesting part.
Kind regards,

[Vidar Berg]

Hi, 

PIN0.0 is configured as input  with pull-up and sense for low level according to log output. PIN_CNF[x] has a bit-field for SENSE configuration. The way I wrote it was a bit misleading. You can see the register description here.

Anyway, can you log the P0.0 register from your main loop to see if the value remains the same?