VxWorks任务创建与任务间通信示例代码及技术解答

这个示例展示了在VxWorks实时操作系统中如何创建任务并实现任务间的通信。使用任务创建函数和消息队列实现多任务并发执行以及任务之间的数据交换。

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

#define TASK_PRIORITY 100
#define TASK_STACK_SIZE 20000
#define MSG_SIZE 50
#define MAX_MSGS 10

MSG_Q_ID msgQueue;

void taskA() {
    char msg[MSG_SIZE] = "Message from Task A";
    while(1) {
        msgQSend(msgQueue, msg, MSG_SIZE, WAIT_FOREVER, MSG_PRI_NORMAL);
        taskDelay(100);
    }
}

void taskB() {
    char receivedMsg[MSG_SIZE];
    while(1) {
        msgQReceive(msgQueue, receivedMsg, MSG_SIZE, WAIT_FOREVER);
        printf("Received message: %s\n", receivedMsg);
        taskDelay(100);
    }
}

void vxWorksExample() {
    msgQueue = msgQCreate(MAX_MSGS, MSG_SIZE, MSG_Q_FIFO);
    taskSpawn("taskA", TASK_PRIORITY, 0, TASK_STACK_SIZE, (FUNCPTR)taskA, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    taskSpawn("taskB", TASK_PRIORITY, 0, TASK_STACK_SIZE, (FUNCPTR)taskB, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
}

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