Visibility to RTOS tasks on EZ430-RF2560 Accelerometer Application

Fred,

Could you clarify what you mean by "simple" device?

The most comprehensive information about the Mindtree stack and the application is available in the Developer's Guide:

http://processors.wiki.ti.com/images/6/6f/MSP430BT5190_CC2560_Developers_Guide.pdf

Regards,
Gustavo

By 'Simple', I am referring to the application referenced on page 58 of the developer's guide you mentioned above. It appears that there is an SDK for that application on the MSP-EXP430F5438, but not for the EZ430-RF2560.

Fred,

Now I understand. There is no simple application for the EZ430. However, you can directly port the Experimenter board code since the only difference is pin configuration. Take a look at the hardware definitions of the EZ430 and the ones in the experimenter board. Apply the EZ430 hardware to the simple application configuration and you can use it in the EZ430.

Regards,
Gustavo

That's great, thanks! I will give it a try.

Back to the RTOS; according the documentation in the code "At least one task should be created via a call to xTaskCreate() before calling vTaskStartScheduler()". Looking at the main() function for the accelerometer application as quoted below, there are no tasks created before the scheduler is called. How is it that any tasks are being called by the RTOS for this application if none were ever created?

int main(void)
{
    sdk_start_scheduler();      /* Start OS scheduler */

    return 0;                   /* Should never reach here */
}

Hi, 

I guess you are referring to the latest FreeRTOS API documentation for vTaskStartScheduler() at http://www.freertos.org/a00132.html

This page shows an example code where a task created before starting the scheduler. Otherwise, the API call to vTaskStartScheduler() will automatically create the idle task. 

Additional tasks are simply created as part of the idle task. 

Regards

Hi Balaji,

I'm referring to the MindTree SDK accelerometer demo for the EZ430-RF256x. The vTaskStartScheduler() is shown below. I don't see that any addtional tasks are created. This is why I can't understand what the RTOS is doing. I also searched the project for 'xTaskCreate' and found nothing. I feel like it's hiding from me.

void vTaskStartScheduler(void)
{
    portBASE_TYPE xReturn;
    /* Add the idle task at the lowest priority. */
    xReturn = xTaskCreate(prvIdleTask, (signed char *)"IDLE", tskIDLE_STACK_SIZE, (void *)NULL, (tskIDLE_PRIORITY | portPRIVILEGE_BIT), (xTaskHandle *) NULL);
    if (xReturn == pdPASS) {
        portDISABLE_INTERRUPTS();
        xSchedulerRunning = pdTRUE;
        xTickCount = (portTickType) 0;
        portCONFIGURE_TIMER_FOR_RUN_TIME_STATS();
        if (xPortStartScheduler()) {}
        else { /* Should only reach here if a task calls xTaskEndScheduler(). */}
    }
}

Excellent. Happy to hear that.

Regards,
Gustavo

Please search for the function sdkPlatformInit(). This is invoked as part of the idle taskfunction portTASK_FUNCTION(prvIdleTask, pvParameters) in the file tasks.c. 

The sdkPlatformInit() function sets up the other tasks in the system. 

Regards