Embedded C Programming End Term: 13 April 2025, Set QEF3 (January 2025 term)

1#include "FreeRTOS.h"
2#include "task.h"
3#include "queue.h"
4
5QueueHandle_t xQueue;
6
7void SenderTask(void *pvParameters) {
8  int data = 100;
9  while (1) {
10    if (xQueueSend(xQueue, &data, pdMS_TO_TICKS(1000)) == pdPASS) {
11      printf("Data sent: %d\n", data);
12    }
13    vTaskDelay(pdMS_TO_TICKS(500));
14  }
15}
16
17void ReceiverTask(void *pvParameters) {
18  int receivedData;
19  while (1) {
20    if (xQueueReceive(xQueue, &receivedData, pdMS_TO_TICKS(2000)) == pdTRUE) {
21      printf("Data received: %d\n", receivedData);
22    }
23  }
24}
25
26int main() {
27  xQueue = xQueueCreate(5, sizeof(int));
28
29  xTaskCreate(SenderTask, "Sender", 1000, NULL, 1, NULL);
30  xTaskCreate(ReceiverTask, "Receiver", 1000, NULL, 1, NULL);
31
32  vTaskStartScheduler();
33  while (1);
34}

1void handleEvent(Event_t event) {
2  switch (currentState) {
3    case STATE_STOPPED:
4      if (event == EVENT_BUTTON_PRESS) {
5        currentState = STATE_SLOW;
6      }
7      break;
8    case STATE_SLOW:
9      if (event == EVENT_BUTTON_PRESS) {
10        currentState = STATE_FAST;
11      }
12      break;
13    case STATE_FAST:
14      if (event == EVENT_BUTTON_PRESS) {
15        currentState = STATE_STOPPED;
16      } else if (event == EVENT_SENSOR_ALERT) {
17        currentState = STATE_OVERSPEED;
18      }
19      break;
20    case STATE_OVERSPEED:
21      if (event == EVENT_BUTTON_PRESS) {
22        currentState = STATE_STOPPED;
23      }
24      break;
25    default:
26      currentState = STATE_STOPPED;
27      break;
28  }
29}