VxWorks任务间通信示例及常见解决方案

VxWorks是一个实时操作系统，提供了任务间通信机制以实现多任务并发操作。其中，消息队列是一种常见的通信方式，允许任务之间交换数据和信息。以下示例演示了如何在VxWorks中创建和使用消息队列进行任务间通信。

#include <vxWorks.h>
#include <msgQLib.h>
#include <stdio.h>

#define MSG_SIZE 50
#define MAX_MSGS 10

MSG_Q_ID msgQId; // 消息队列ID

void task1() {
    char message[MSG_SIZE] = "Hello from Task 1";
    msgQSend(msgQId, message, sizeof(message), WAIT_FOREVER, MSG_PRI_NORMAL);
}

void task2() {
    char receivedMsg[MSG_SIZE];
    while (1) {
        if (msgQReceive(msgQId, receivedMsg, MSG_SIZE, WAIT_FOREVER) != ERROR) {
            printf("Received message: %s\n", receivedMsg);
        }
    }
}

void main() {
    msgQId = msgQCreate(MAX_MSGS, MSG_SIZE, MSG_Q_FIFO);
    taskSpawn("t1", 100, 0, 2000, (FUNCPTR)task1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    taskSpawn("t2", 100, 0, 2000, (FUNCPTR)task2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
}

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