Custom board based on nrf52832 s132 pin input P0.09

RE: Custom board based on nrf52832 s132 pin input P0.09

FormerMember — Wed, 14 Mar 2018 09:24:03 GMT

When I configure pin 9 as a GPIO and set the pull to "pull-down" and test here, the voltage on pin 9 is 0.

What kind of board do you use? A custom board? Could you try the same configurations on the nRF52-DK and check if it works?

Could could check that the button on your board is correctly soldered? I.e, not shifted by 90 degrees for example.

RE: Custom board based on nrf52832 s132 pin input P0.09

dhinojosac — Tue, 13 Mar 2018 12:38:05 GMT

First, in the main

int main(void)
{
    bool erase_bonds;
    log_init();
    timer_init();

    buttons_leds_init(&erase_bonds); //init leds and buttons

    board_bikelite_init();  // INIT BOARD BIKELITE
    ...

In the function buttons_leds_init

static void buttons_leds_init(bool * p_erase_bonds)
{
    ret_code_t err_code;
    bsp_event_t startup_event;

    /** init buttons and leds in bsp.c **/
    err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, bsp_event_handler); 
    APP_ERROR_CHECK(err_code);


    err_code = bsp_btn_ble_init(NULL, &startup_event);
    APP_ERROR_CHECK(err_code);

    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

In the bsp_init() in the bsp.c

uint32_t bsp_init(uint32_t type, bsp_event_callback_t callback)
{
    uint32_t err_code = NRF_SUCCESS;

#if LEDS_NUMBER > 0 && !(defined BSP_SIMPLE)
    m_indication_type     = type;
#endif // LEDS_NUMBER > 0 && !(defined BSP_SIMPLE)

#if (BUTTONS_NUMBER > 0) && !(defined BSP_SIMPLE)
    m_registered_callback = callback;

    // BSP will support buttons and generate events
    if (type & BSP_INIT_BUTTONS)
    {
        uint32_t num;

        for (num = 0; ((num < BUTTONS_NUMBER) && (err_code == NRF_SUCCESS)); num++)
        {
            err_code = bsp_event_to_button_action_assign(num, BSP_BUTTON_ACTION_PUSH, BSP_EVENT_DEFAULT);
        }

        if (err_code == NRF_SUCCESS)
        {
            err_code = app_button_init((app_button_cfg_t *)app_buttons,
                                       BUTTONS_NUMBER,
                                       APP_TIMER_TICKS(50));
        }

        if (err_code == NRF_SUCCESS)
        {
            err_code = app_button_enable();
        }

        if (err_code == NRF_SUCCESS)
        {
            err_code = app_timer_create(&m_button_timer_id,
                                        APP_TIMER_MODE_SINGLE_SHOT,
                                        button_timer_handler);
        }
    }

In the fuction app_button_init we passed the buttons defined in bsp.c as:

static const app_button_cfg_t app_buttons[BUTTONS_NUMBER] =
{
    #ifdef BSP_BUTTON_0
    {BSP_BUTTON_0, APP_BUTTON_ACTIVE_HIGH, BUTTON_PULL, bsp_button_event_handler},
    #endif // BUTTON_0

    #ifdef BSP_BUTTON_1
    {BSP_BUTTON_1, APP_BUTTON_ACTIVE_HIGH, BUTTON_PULL, bsp_button_event_handler},
    #endif // BUTTON_1

    /** BSP_BUTTON_2  = BUTTON_3 = 9 (P0.09) and BUTTON_PULL is NRF_GPIO_PIN_PULLDOWN**/
    #ifdef BSP_BUTTON_2
    {BSP_BUTTON_2, APP_BUTTON_ACTIVE_HIGH, BUTTON_PULL, bsp_button_event_handler},
    #endif // BUTTON_2

It is configured as input with pull down, but we don'tt understand the reason of the voltage :S

RE: Custom board based on nrf52832 s132 pin input P0.09

FormerMember — Tue, 13 Mar 2018 08:22:22 GMT

From that read-out of UICR, the "NFC-pins" are set to be used as GPIOs.

How do you configure pin 9 (BUTTON_3) in your code?

RE: Custom board based on nrf52832 s132 pin input P0.09

dhinojosac — Mon, 12 Mar 2018 21:58:56 GMT

Using nrfjprog to read the specific address of the pin.

RE: Custom board based on nrf52832 s132 pin input P0.09

dhinojosac — Mon, 12 Mar 2018 14:44:12 GMT

Thanks, I attach the UICR reading file.
devzone.nordicsemi.com/.../read_5F00_uicr.log

RE: Custom board based on nrf52832 s132 pin input P0.09

FormerMember — Mon, 12 Mar 2018 13:52:20 GMT

If CONFIG_NFCT_PINS_AS_GPIOS is set in "pre-processor" symbols, the "NFC-pins" should be regular GPIOs.

To double check that the configuration is correct, you can read UICR using nrfjprog. What is the result from that reading?