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daq.c

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+/*
+*/
+
+#include<stdio.h>
+#include<fcntl.h>
+#include<unistd.h>
+#include<string.h>
+#include<stdlib.h>
+#include<time.h>
+#include"uart.c"
+
+#define data_file_path  "/var/lib/cloud9/c9projets/newUART/data.dat"
+
+#define GC0017     4    //co2
+#define CM31911    1    //co
+#define OX0052     2    //o2
+
+#define Rep_Dev_ID      "Y\r\n"
+#define Pulling_Mode    "K 2\r\n"
+#define OX_P_Mode       "K 1\r\n"
+#define unf_gas_con     "z\r\n"
+#define fil_gas_con     "Z\r\n"
+#define Temperature     "T\r\n"
+#define get_readigns    "Q\r\n"
+#define percent_oxigen  "%\r\n"
+
+
+int sensConf(unsigned char uartNumber, int baudRate, unsigned char mode[], unsigned char response[]);
+int measure(unsigned char uartNumber, unsigned char command[], int multiplier, int excess);
+
+int str2int(unsigned char *ptr);
+
+int DAQ(int t_hrs, int tm_s);
+
+
+int main(){
+    
+    //configuración de sensores
+    printf("Configuring CO2 sensor\n");
+    sensConf(GC0017, B9600, Pulling_Mode, " K 00002\r\n");
+    printf("Configuring CO sensor\n");
+    sensConf(CM31911, B9600, Pulling_Mode, "K 00002\r\n");
+    //printf("Configuring O2 sensor\n");
+    //sensConf(OX0052, B9600, OX_P_Mode, "??");
+
+    
+    //adquisición
+    printf("Starting data acquisition\n");
+    DAQ(1, 3);
+    sleep(1);
+    
+    //finalización
+    //deinit uart
+    uartClose(GC0017);
+    uartClose(CM31911);
+    uartClose(OX0052);
+    
+    printf("Exiting of the program...\n");
+    return 0;
+}
+
+
+int sensConf(unsigned char uartNumber, int baudRate, unsigned char mode[], unsigned char response[]){
+    
+    int count;
+    int i = 0;
+    
+    uartConf(uartNumber, baudRate);
+    
+    while( i < 10 ){
+        uartTransmit(uartNumber, mode);
+        tcdrain(uartFile[uartNumber]);  //wait all data has been sent
+        printf("Command sended.\n");
+        //usleep(100000);                  //give the sensor a chance to respond
+        count = uartReceive(uartNumber);
+        if (count == 0) printf("There was no data available to read!\n");
+        else if (strcmp(receive[uartNumber], response) == 0) {
+                printf("Sensor configurated after %d tries.\n", i+1);
+                return 0;
+        } else {
+            printf("The following was read in [%d]: %s\n",count,receive[uartNumber]);
+            char *c = receive[uartNumber];
+            while (*c != '\0'){
+                printf("%d = '%c'\n",*c, *c);
+                c++;
+            }
+        }
+        i ++;
+    }
+    printf("CO2 Sensor configuration failed.\n");
+    return -1;
+}
+
+int measure(unsigned char uartNumber, unsigned char command[], int multiplier, int excess){
+    int measure;
+    uartTransmit(uartNumber, command);
+    uartReceive(uartNumber);
+    measure = (str2int(&receive[uartNumber]) - excess)*multiplier ;
+    return measure;
+}
+
+int str2int(unsigned char *ptr){
+
+  int number = 0;
+
+  while (*ptr != '\0') {
+    if ((*ptr >= '0') && (*ptr <= '9')) {
+      int dig = (*ptr) - '0';
+      number = number*10 + dig;
+    }
+    ptr++;
+  }
+  return number;
+}
+
+int DAQ(int t_hrs, int tm_s)
+{
+    FILE* dfp; // create a file pointer dfp
+    int co2, co, o2, temp;
+    clock_t start_t, end_t;
+    time_t new_time, prev_time, t0;
+	double dif;
+
+    
+    //registro datos de inicio
+    dfp = fopen(data_file_path, "w"); // open file for writing
+    time_t curtime;
+    time(&curtime);
+    fprintf(dfp, "%sStarting DAQ\ntime(s)\t\tCO2(ppm)\t\tCO(ppm)\t\tO2(ppm)\t\tTemperaure(ºC*10)\n", ctime(&curtime)); // send the value to the file
+    fclose(dfp); // close the file using the file pointer
+    
+    //ciclo
+    t0 = (prev_time=time(NULL));
+    for(int i = 0; i < (t_hrs*3600); i=i+tm_s){
+        while((prev_time+tm_s) != (new_time = time(NULL)));
+        start_t = clock();
+            co2 = measure(GC0017, fil_gas_con, 10, 0); co = measure(CM31911, fil_gas_con, 1, 0);
+            /*o2 = measure(OX0052, percent_oxigen, 1, 0);*/temp = measure(CM31911, Temperature, 1, 1000);
+            dfp = fopen(data_file_path, "a"); // open file for writing
+            fprintf(dfp, "%ld \t\t%d\t\t%d\t\t%d\t\t%d\n", new_time-t0, co2, co, o2, temp); // send the value to the file
+            fclose(dfp); // close the file using the file pointer
+            prev_time = new_time;
+        end_t = clock();
+        dif = (double)(end_t - start_t)*1e6 / CLOCKS_PER_SEC;
+        dif = tm_s*1e6 - dif - .15e6;
+        if (dif < 0) dif = 0;
+        usleep((int)dif);
+    }
+    
+    return 0;
+}
+