"Task Notifications" on nRF51/nRF52

[Gianluca]

Hello,

I'm using FreeRTOS on nRF51 and I would like to use task notifications instead of semaphore to simply manage task's syncronization.

To test its operation mode, I implemented the simple example shown at www.freertos.org/xTaskNotifyGive.html.

Unfortunately, it seems not working. Could somebody help me to understand why it is not working?

Thanks in advance.

EDIT:

I'm still having this problem. This is my code, Can somebody help me???

#include <stdbool.h>
#include <stdint.h>

#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"
#include "semphr.h"

#include "bsp.h"
#include "nordic_common.h"
#include "nrf_gpio.h"
#include "nrf_drv_clock.h"
#include "sdk_errors.h"
#include "app_error.h"
#include "nrf_delay.h"

#include "SEGGER_RTT.h"

#define TASK_DELAY_Red 1000

//#define TIMER_PERIOD_Red 700

// Task Handles
TaskHandle_t xTask_1 = NULL;
TaskHandle_t xTask_2 = NULL;

static void vTask_1 (void *pvParameter);
static void vTask_2 (void *pvParameter);

static void vTask_1 (void *pvParameter)
{
//UNUSED_PARAMETER(pvParameter);
for( ;; )
{
SEGGER_RTT_printf(0,"Inside vTask_1, notification to vTask_2\r\n");
xTaskNotifyGive( vTask_2 );

SEGGER_RTT_printf(0,"Inside vTask_1, waiting the notification from vTask_2\r\n");
ulTaskNotifyTake( pdFALSE, 3000 );
}
}

static void vTask_2 (void *pvParameter)
{
//UNUSED_PARAMETER(pvParameter);
for( ;; )
{
SEGGER_RTT_printf(0,"Inside vTask_2, waiting the notification from vTask_1\r\n");
ulTaskNotifyTake( pdFALSE, 3000 );

SEGGER_RTT_printf(0,"Inside vTask_2, notification to vTask_1\r\n");
xTaskNotifyGive( vTask_1 );

}
}

int main(void)
{

xTaskCreate( vTask_1, "T1", configMINIMAL_STACK_SIZE + 200, NULL, 1, &xTask_1 );
xTaskCreate( vTask_2, "T2", configMINIMAL_STACK_SIZE + 200, NULL, 1, &xTask_2 );

vTaskStartScheduler();

while (true)
{
}
}

[drk_tg]

Hi,

It works for me. :-) Both on version 8.x.x and 9.x.x. of FreeRTOS. Can you post your code?

[Gianluca]

Hello,

This is my code. 

Do you notice any error?

#include <stdbool.h>
#include <stdint.h>

#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"
#include "semphr.h"

#include "bsp.h"
#include "nordic_common.h"
#include "nrf_gpio.h"
#include "nrf_drv_clock.h"
#include "sdk_errors.h"
#include "app_error.h"
#include "nrf_delay.h"

#include "SEGGER_RTT.h"

#define TASK_DELAY_Red 1000

//#define TIMER_PERIOD_Red 700

// Task Handles
TaskHandle_t xTask_1 = NULL;
TaskHandle_t xTask_2 = NULL;

static void vTask_1 (void *pvParameter);
static void vTask_2 (void *pvParameter);



static void vTask_1 (void *pvParameter)
{ 
    //UNUSED_PARAMETER(pvParameter);
    for( ;; )
    {
        SEGGER_RTT_printf(0,"Inside vTask_1, notification to vTask_2\r\n");
        xTaskNotifyGive( vTask_2 );
        
        SEGGER_RTT_printf(0,"Inside vTask_1, waiting the notification from vTask_2\r\n");
        ulTaskNotifyTake( pdFALSE, 3000 );
    }
}





static void vTask_2 (void *pvParameter)
{
    //UNUSED_PARAMETER(pvParameter);
    for( ;; )
    {
        SEGGER_RTT_printf(0,"Inside vTask_2, waiting the notification from vTask_1\r\n");
        ulTaskNotifyTake( pdFALSE, 3000 );
        
        SEGGER_RTT_printf(0,"Inside vTask_2, notification to vTask_1\r\n");
        xTaskNotifyGive( vTask_1 );
    
    }
}

int main(void)
{
    
    xTaskCreate( vTask_1, "T1", configMINIMAL_STACK_SIZE + 200, NULL, 1, &xTask_1 );
    xTaskCreate( vTask_2, "T2", configMINIMAL_STACK_SIZE + 200, NULL, 1, &xTask_2 );
    
    vTaskStartScheduler();
    
    while (true)
    {
    }
}

[Susheel Nuguru]

did you manage to fix this problem?