20190616 - Raspberry Pi

tags: tcfst

Author

• Yuan < [e-mail] >
• Wei < [e-mail] >
• Jia-Hao,Hsu < [e-mail] >

License

OpenCV & Camara

• Pi Facerec Box

Web-Cam

• mjpg-streamer

Google App Srcipt

• Google Apps Script
  

Arduino Demo

Reference

• 用 Google Apps Script 操作試算表

Line Bot

Reference

• Building Line bot

• Line Messaging API

Socket

• Python socket

UDP

TCP

Using Thread

Multicast

Thread

Header File

#include <pthread.h>

Example

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

void *print_message_function( void *ptr );

main()
{
     pthread_t thread1, thread2;
     char *message1 = "Thread 1";
     char *message2 = "Thread 2";
     int  iret1, iret2;

    /* Create independent threads each of which will execute function */

     iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1);
     iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2);

     /* Wait till threads are complete before main continues. Unless we  */
     /* wait we run the risk of executing an exit which will terminate   */
     /* the process and all threads before the threads have completed.   */

     pthread_join( thread1, NULL);
     pthread_join( thread2, NULL); 

     printf("Thread 1 returns: %d\n",iret1);
     printf("Thread 2 returns: %d\n",iret2);
     exit(0);
}

void *print_message_function( void *ptr )
{
     char *message;
     message = (char *) ptr;
     printf("%s \n", message);
}

Process and Synchronize

Reference:

• 行程間的通訊與同步P.5
• Semaphore
• Mutex

梗區

場外

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