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 aknockae
La com série entr...
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/*
* Test on serial device
*/
////
// Include files
////
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <libwebsockets.h>
#include "serial.h"
#define MAX_FRAME_SIZE 1024
#define WAIT_DELAY 50
#define SERIAL_DEVICE "/dev/ttyACM0"
/*****************************************************************************/
/**********************PARTIE WEBSOCKETS + COM SERIE**************************/
/*****************************************************************************/
//Fonction qui retourne un tableau de char, chaque char correspondant à une donnée d'un capteur
char * getDataFromSensors(char *request,int sizeOfRequest)
{
int sd=serialOpen(SERIAL_DEVICE,SERIAL_BOTH);
serialConfig(sd,B9600);
int i;
char *reponse = NULL;
//On envoie le GET au FPGA pour récupérer les données
for(i = 0; i < sizeOfRequest;i++)
{
if(write(sd,(void*)&request[i],sizeof(char))!=1)
{
perror("main.write"); exit(-1);
}
}
printf("\nReponse : ");
reponse = malloc(3*sizeof(char));
for(i=0;i < 3;i++)
{
if(read(sd,(void*)&reponse[i],sizeof(char))!=1)
{
perror("main.read"); exit(-1);
}
}
printf("\nTemperature : %d",reponse[1]);
printf("\nPressure : %d",reponse[0]);
printf("\nHumidity : %d\n",reponse[2]);
serialClose(sd);
return reponse;
}
static int callback_http(struct libwebsocket_context *this, struct libwebsocket *wsi, enum libwebsocket_callback_reasons reason, void *user,void *in,size_t len)
{
return 0;
}
static int callback_my(struct libwebsocket_context * this, struct libwebsocket *wsi, enum libwebsocket_callback_reasons reason, void *user,void *in,size_t len)
{
static char *requete = NULL;
static char *reponse = NULL;
static int msize=0;
switch(reason)
{
case LWS_CALLBACK_ESTABLISHED:
printf("connection established\n");
requete=NULL;
// Declenchement d'un prochain envoi au navigateur
libwebsocket_callback_on_writable(this,wsi);
break;
case LWS_CALLBACK_RECEIVE:
// Ici sont traites les messages envoyes par le navigateur
printf("received data: %s\n",(char *)in);
requete=malloc(len+LWS_SEND_BUFFER_PRE_PADDING+LWS_SEND_BUFFER_POST_PADDING);
if(requete==NULL)
{
perror("callback_my.malloc"); exit(EXIT_FAILURE);
}
memcpy(requete+LWS_SEND_BUFFER_PRE_PADDING,in,len);
// Declenchement d'un prochain envoi au navigateur
msize=len;
libwebsocket_callback_on_writable(this,wsi);
break;
case LWS_CALLBACK_SERVER_WRITEABLE:
// Ici sont envoyes les messages au navigateur
//Si la requete a pour valeur GET, on envoie les donnée au site
if(requete!= NULL)
{
if(requete[0] == 'G' && requete[1] == 'E' && requete[2] == 'T')
{
char *reponse = NULL;
reponse = getDataFromSensors(requete,3);
int length = 3;
unsigned char *buf = malloc(LWS_SEND_BUFFER_PRE_PADDING + length + LWS_SEND_BUFFER_POST_PADDING);
memcpy (buf + LWS_SEND_BUFFER_PRE_PADDING, reponse, length );
libwebsocket_write(wsi, buf + LWS_SEND_BUFFER_PRE_PADDING, length, LWS_WRITE_TEXT);
free(reponse);
free(requete);
requete = NULL;
reponse = NULL;
}
}
break;
default:
break;
}
return 0;
}
static struct libwebsocket_protocols protocols[] = {
{
"http-only", // name
callback_http, // callback
0, // data size
0 // maximum frame size
},
{"myprotocol",callback_my,0,MAX_FRAME_SIZE},
{NULL,NULL,0,0}
};
/*****************************************************************/
/**********************MAIN***************************************/
/*****************************************************************/
int main(void){
char j;
int i;
unsigned long count = 0;
//Initialisation WebSockets
int port=9000;
struct lws_context_creation_info info;
memset(&info,0,sizeof info);
info.port=port;
info.protocols=protocols;
info.gid=-1;
info.uid=-1;
struct libwebsocket_context *context=libwebsocket_create_context(&info);
//Initialisation com Serie
if(context==NULL)
{
fprintf(stderr, "libwebsocket init failed\n");
return -1;
}
printf("starting server...\n");
//boucle infinie du main
while(1)
{
libwebsocket_service(context,WAIT_DELAY);
}
libwebsocket_context_destroy(context);
return 0;
}
//********************************************************************************//
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