Producer-consumer pattern in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a queue for the producer-consumer pattern.

FreeRTOS

QueueHandle_t xQueue = xQueueCreate([1], sizeof(int));

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A10

BxQueueSend

CvTaskDelay

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name instead of a number for queue size.

Passing NULL instead of a number.

The queue size must be specified as a number, here 10, to hold 10 items.

2fill in blank

medium

Complete the code to send data from the producer to the queue.

FreeRTOS

xQueueSend([1], &data, portMAX_DELAY);

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AxSemaphore

BxQueue

CxTaskHandle

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Using a semaphore handle instead of the queue handle.

Passing NULL as the queue handle.

The queue handle xQueue is used to send data to the queue.

3fill in blank

hard

Fix the error in the consumer task to receive data from the queue.

FreeRTOS

if(xQueueReceive([1], &receivedData, portMAX_DELAY) == pdPASS) {
    // process receivedData
}

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AxSemaphore

BxTaskHandle

CxQueue

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Using a semaphore handle instead of the queue handle.

Passing NULL as the queue handle.

The queue handle xQueue must be used to receive data from the queue.

4fill in blank

hard

Fill both blanks to create a producer task that sends data to the queue and delays.

FreeRTOS

void vProducerTask(void *pvParameters) {
    int data = 0;
    for(;;) {
        xQueue[1](xQueue, &data, portMAX_DELAY);
        data++;
        vTask[2](pdMS_TO_TICKS(1000));
    }
}

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ASend

BDelay

CReceive

DDelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using xQueueReceive in the producer task.

Using vTaskDelete instead of vTaskDelay.

The producer sends data with xQueueSend and delays with vTaskDelay.

5fill in blank

hard

Fill all three blanks to create a consumer task that receives data, processes it, and delays.

FreeRTOS

void vConsumerTask(void *pvParameters) {
    int receivedData;
    for(;;) {
        if(xQueue[1](xQueue, &receivedData, portMAX_DELAY) == pdPASS) {
            processData([2]);
        }
        vTask[3](pdMS_TO_TICKS(500));
    }
}

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ASend

BreceivedData

CDelay

DReceive

Attempts:

3 left

💡 Hint

Common Mistakes

Using xQueueSend instead of xQueueReceive in the consumer.

Passing wrong variable to processData.

Using vTaskDelete instead of vTaskDelay.

The consumer receives data with xQueueReceive, processes the receivedData variable, and delays with vTaskDelay.