Facing issues when running a simple Free rtos Button LED

RE: Facing issues when running a simple Free rtos Button LED

Susheel Nuguru — Thu, 07 Jan 2021 08:25:15 GMT

Well, you have made no connection to the button/gpio handler to your task. I think instead of making this a task, you need to make this a button_callback handler that gets called from the button handler library when you press the button.

Please read mode about the button library in the link i mentioned in my previous reply and the code snippet to aid to understand it.

RE: Facing issues when running a simple Free rtos Button LED

ashokraj — Thu, 07 Jan 2021 06:11:17 GMT

Hi Susheel,,

Thanks for your response.

Why do you have a while(1) in your button_task_handler?

I have kept a while(1) becuase I want to implement this logic in free rtos. I am with an impression that, every task in free rrtos needs to have a while(1) loop.

I want to implement button , led as a two separate tasks running on freertos. so I tried to implement them as tasks!!

RE: Facing issues when running a simple Free rtos Button LED

Susheel Nuguru — Mon, 04 Jan 2021 11:23:15 GMT

You are not initializing any button gpios to connect them to you button handler. Why do you have a while(1) in your button_task_handler?

Please look at the app_button library documentation and an example how to use it in nRF5_SDK_17.0.0_9d13099\examples\ble_peripheral\ble_app_tile\main.c

Normally you initialize a button handler to a gpio as below

static void button_event_handler(uint8_t pin_no, uint8_t button_action)
{

}

/**@brief Function for initializing the button handler module.
 */
static void buttons_init(void)
{
    ret_code_t err_code;

    //The array must be static because a pointer to it will be saved in the button handler module.
    static app_button_cfg_t buttons[] =
    {
        {BUTTON, APP_BUTTON_ACTIVE_LOW, BUTTON_PULL, button_event_handler}
    };

    err_code = app_button_init(buttons, ARRAY_SIZE(buttons),
                               BUTTON_DETECTION_DELAY);
    APP_ERROR_CHECK(err_code);
}

itn main()
{
        buttons_init();
        uint32_t err_code = app_button_enable();
        APP_ERROR_CHECK(err_code);
}

You do not need to create a task for the button_handler as it should be a registered callback that should come from app_button library which is called when you press the button you registered.

RE: Facing issues when running a simple Free rtos Button LED

ashokraj — Wed, 30 Dec 2020 10:49:21 GMT

ok Thanks Marte, Will be waiting for your team to come back

RE: Facing issues when running a simple Free rtos Button LED

Marte Myrvold — Wed, 23 Dec 2020 07:33:36 GMT

Hi Ashok,

I'm afraid our FreeRTOS expert is out of office because of holiday seasons, but I will come back to you when he's back.

Best regards,

Marte

RE: Facing issues when running a simple Free rtos Button LED

ashokraj — Sat, 19 Dec 2020 05:57:09 GMT

Hi Marte,

Thanks for your response. I have developed the code based on Blinky freeRTOS example only. In my code led_toggle task is extraced from FreeRTOS example. Led_toggle_task is running but not button and LED task.

Regards,

Ashok

RE: Facing issues when running a simple Free rtos Button LED

Marte Myrvold — Fri, 18 Dec 2020 13:02:24 GMT

Hi,

I would recommend starting out with one of the existing examples in the SDK, and then build on top of that one. Since you're working with FreeRTOS and you want to use the LEDs, you should start with the Blinky FreeRTOS example, and then add button functionality to that one.

Best regards,

Marte