Diff: main.cpp

Revision:

2:bc6e512b58ac

Parent:

1:ddac5ec89167

Child:

3:08260b6b0828

--- a/main.cpp	Wed Aug 11 03:50:32 2021 +0000
+++ b/main.cpp	Tue Aug 16 10:05:12 2022 +0000
@@ -1,19 +1,99 @@
 #include "mbed.h"
+#include "LPS.h"
 #include "HEPTA_CDH.h"
+Timer t;
+Serial pc(USBTX, USBRX); // tx, rx
+Serial xbee(D1, D0); // tx, rx
+I2C i2c(D4,D5);
+LPS ps(i2c);
 HEPTA_CDH cdh(PB_5, PB_4, PB_3, PA_8, "sd");
-Serial pc(USBTX,USBRX,9600);
-int main()
-{
-    pc.printf("Hello World!\n");
- 
+Ticker press;
+int i;
+int ct = 0;
+float pressure = 0;
+float altitude = 0;
+float temperature = 0;
+char cmd1,cmd2,cmd3;
+void pre() {
+    xbee.printf("%.2f %.2f %.2f \r\n",pressure,altitude,temperature);
+}
+int main() {//1
+    //Display from satellite to PC via xbee.
+    pc.printf("settig start\r\n");
+    xbee.printf("settig start\r\n");
+    
+    //Create a file to save the data acquired from the sensor to a microSD card
+    //Also, if there is no microSD card, this error statement will be displayed
     mkdir("/sd/mydir", 0777);
- 
     FILE *fp = fopen("/sd/mydir/sdtest.txt", "w");
     if(fp == NULL) {
         error("Could not open file for write\r\n");
     }
-    fprintf(fp, "Hello my name is HEPTA\r\n");
-    fclose(fp);
- 
-    pc.printf("Goodbye World!\r\n");
-}
\ No newline at end of file
+    
+    //If there is no Barometric Pressure Sensors, this error statement will appear in teraterm
+    if (!ps.init()){//2
+        printf("Failed to autodetect pressure sensor!\r\n");
+        while (1);
+    }//2
+    ps.enableDefault();
+    
+    //Display "begin" in teraterm and save it to SDcard
+    pc.printf("begin\r\n");
+    xbee.printf("begin\r\n");
+    fprintf(fp,"begin\r\n");
+    for (;;) {//2
+        //if (pc.readable()) xbee.putc(pc.getc());
+        if (xbee.readable()) {//3
+            pc.putc(xbee.getc());
+            cmd1 = xbee.getc();
+        //char cmd1 = xbee.getc();//cmd共有
+        
+        //Input "m", the sensor data is displayed on the teraterm.
+        //And the acquired data is saved to the SD card.
+            if(cmd1 == 'm'){//4
+                pc.printf("start\r\n");
+                fprintf(fp,"start\r\n");
+                xbee.printf("start\r\n");
+                t.start();
+                
+                cmd1 = '\0';
+                
+                pc.printf("p [mbar]\ta [m]\tdeg [C]\r\n");
+                xbee.printf("p [mbar]\ta [m]\tdeg [C]\r\n");
+                fprintf(fp,"p [mbar]\ta [m]\tdeg [C]\r\n");
+                fclose(fp);
+                press.attach(&pre, 0.1);
+                //Save sensor acquisition data to SD card every 10 times
+                while(1){//5
+                    FILE *fp = fopen("/sd/mydir/sdtest.txt", "a");
+                    for(i = 0;i<10;i++){//6
+                        pressure = ps.readPressureMillibars();
+                        altitude = ps.pressureToAltitudeMeters(pressure);
+                        temperature = ps.readTemperatureC();
+                        fprintf(fp,"%d %.2f\t \t%.2f \t%.2f \r\n",ct,pressure,altitude,temperature);
+                        ct = ct + 1;
+                        //if (pc.readable()) xbee.putc(pc.getc());
+                        if (xbee.readable()){//7
+                            pc.putc(xbee.getc());
+                            cmd2 = xbee.getc();
+                            //char cmd2 = xbee.getc();
+                            //xbee.printf("%c\r\n",cmd);
+                            if(cmd2 == 'n'){//8
+                                press.detach();
+                                pc.printf("end\r\n");
+                                pc.printf("time = %f",t.read());
+                                fprintf(fp,"time = %f",t.read());
+                                t.stop();
+                                fclose(fp);
+                                cmd2 = '\0';
+                                return 0;
+                                            }//8
+                                        }//7
+                        wait_us(1);
+                    }//6
+                    fclose(fp);
+                }//5
+            }//4
+        }//3
+    }//2
+}//1
\ No newline at end of file