automatique.c
4.84 KB
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/*-------------------------------------------------------------------------------
--------------------------PROJET BALLON ATMOSPHERIQUE ---------------------------
----------------------Baptiste GRILLERE - Olivier MAHIEUX------------------------
--------------------------------------IMA4---------------------------------------
---------------------------------------------------------------------------------
--------------------------------PROGRAMME AUTOMATIQUE----------------------------
---------------------------------------------------------------------------------*/
#include<stdlib.h>
#include<stdio.h>
#include<unistd.h>
#include<fcntl.h>
#include<termios.h>
#include<string.h>
#include<sys/types.h>
#include<sys/ioctl.h>
#include<linux/serial.h>
//INITIALISATIONS
//Variables pour le traitement de données GPS
char data_gps[1024];
char trame[69], header[64], time[64], lat[64], longi[64],alt[64], nord[64], est[64];
char metres[64] = "metres";
int retoursscanf = 0; //sert à déterminer si on lit une trame GPS complète
//Variables pour la detection de la chute du ballon
int alt_int_tmp = 50;
int alt_int;
int diff=0;
//Descripteurs de fichier pour gestion des ports USB
int portGPS;
int portCAPTEUR;
int portLORA;
FILE* fp;
char pression[64]; //donnée de pression en hPa
char hp[16] = "hPa";
//Le mode initial est "en ascension"
int mode = 0;
int init_serial(char*device,int speed){
struct termios new;
struct termios saveterm;
int fd = open(device,O_NOCTTY|O_RDWR|O_NONBLOCK);
if(fd<0){perror(device); exit(-1);}
tcgetattr(fd,&saveterm); /* save current port settings */
bzero(&new,sizeof(new));
new.c_cflag=CLOCAL|CREAD|speed|CS8;
new.c_iflag=0;
new.c_oflag=0;
new.c_lflag=0; /* set input mode (non-canonical, no echo,...) */
new.c_cc[VTIME]=0; /* inter-character timer unused */
new.c_cc[VMIN]=1; /* blocking read until 1 char received */
tcflush(fd, TCIFLUSH);
tcsetattr(fd,TCSANOW,&new);
return fd;
}
void init_PORT(){
portGPS = init_serial("/dev/ttyUSB0",B9600);
portLORA = init_serial("/dev/ttyACM0",B9600);
portCAPTEUR = init_serial("/dev/ttyACM1",B9600);
fp=fdopen(portGPS,"r");
}
//Fonction stockant dans data_GPS les données provenant du GPS
void lecture_GPS(){
printf("lecture GPS....\n");
while( (retoursscanf != 7) && ( memcmp(header,"$GPGGA",6) != 0) )
{
//Acquisition trame GPS
fgets(data_gps,sizeof(data_gps),fp);
//traitement de la trame
retoursscanf = sscanf(data_gps,"%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%*[^,],%*[^,],%*[^,],%[^,],%*[^,],%*[^,],%*[^,],%*[^,],%*s", header, time, lat, nord, longi, est, alt);
//printf("retour: %d\n",retoursscanf);
printf("header: %s\n",header);
}
printf("heure : %s\n", time);
printf("header : %s\n", header);
printf("latitude : %s\n", lat);
printf("longitude : %s\n", longi);
printf("altitude : %s\n", alt);
alt_int = atoi(alt);
//Envoi au sol des données traitées
if(mode == 0)
write(portLORA,&time,sizeof(time));
if(mode == 0 || mode == 1){
write(portLORA,&lat,sizeof(lat));
write(portLORA,&nord,sizeof(nord));
}
if(mode == 0 || mode == 1){
write(portLORA,&longi,sizeof(longi));
write(portLORA,&est,sizeof(est));
}
if(mode==0 || mode==1){
write(portLORA,&alt,sizeof(alt));
write(portLORA,&metres,sizeof(metres));
}
}
void lecture_capteur(){
read(portCAPTEUR,&pression,sizeof(pression));
printf("pression = %s\n",pression);
write(portLORA,&pression,sizeof(pression));
write(portLORA,&hp,sizeof(hp));
sleep(1);
}
//MODE AUTOMATIQUE
int main(void) {
init_PORT();
while(1) {
//MODE ASCENSION
while(mode == 0){
printf("Mode ascension actif\n");
lecture_capteur();
alt_int_tmp = alt_int;
lecture_GPS();
diff = abs(alt_int - alt_int_tmp);
printf("diff: %d\n", diff);
printf("mode: %d\n",mode);
if(200 <= diff)
mode = 1;
sleep(10);
}
//MODE CHUTE
while(mode == 1){
printf("Mode CHUTE\n");
lecture_GPS();
sleep(1);
}
}
return 0;
}