Semaphore Synchronization (FreeRTOS) - Freertos Typing CST Test
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Semaphore Synchronization (FreeRTOS) — Freertos Code
Uses a binary semaphore to synchronize two tasks.
#include <FreeRTOS.h>
#include <task.h>
#include <semphr.h>
#include <stdio.h>
SemaphoreHandle_t xBinarySem;
void vTaskProducer(void* pvParameters) {
printf("Producer giving semaphore\n");
xSemaphoreGive(xBinarySem);
vTaskDelete(NULL);
}
void vTaskConsumer(void* pvParameters) {
xSemaphoreTake(xBinarySem, portMAX_DELAY);
printf("Consumer received semaphore\n");
vTaskDelete(NULL);
}
int main() {
xBinarySem = xSemaphoreCreateBinary();
xTaskCreate(vTaskProducer, "Producer", configMINIMAL_STACK_SIZE, NULL, 1, NULL);
xTaskCreate(vTaskConsumer, "Consumer", configMINIMAL_STACK_SIZE, NULL, 1, NULL);
vTaskStartScheduler();
return 0;
}Freertos Language Guide
FreeRTOS is a lightweight, open-source real-time operating system (RTOS) kernel for embedded devices. It provides multitasking, scheduling, and inter-task communication for microcontrollers and small processors.
Primary Use Cases
- ▸Task scheduling for embedded systems
- ▸IoT and sensor node software
- ▸Industrial automation control
- ▸Real-time motor and sensor management
- ▸Edge devices and microcontroller applications
Notable Features
- ▸Preemptive and cooperative multitasking
- ▸Task priorities and time slicing
- ▸Inter-task communication (queues, semaphores, mutexes)
- ▸Software timers and tickless idle mode
- ▸Memory management and dynamic allocation support
Origin & Creator
Created by Richard Barry in 2003, now maintained and extended by Amazon Web Services as Amazon FreeRTOS and FreeRTOS Kernel.
Industrial Note
Essential in embedded systems requiring predictable real-time behavior, small footprint, and multitasking support-commonly used in IoT sensors, motor control, and safety-related microcontroller applications.