Diff: main.cpp

Revision:

0:2a95ba95e37d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 14 19:41:45 2020 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+#include "BMP180.h"
+#include <stdio.h>
+
+
+I2C i2c(D4, D5);
+BMP180 bmp180(&i2c);
+Serial xbee(PA_9, PA_10);
+DigitalOut led(LED1);
+PwmOut servo(A1);
+float calc(float);
+
+float get_P()
+{
+    float sum = 0.0f;
+    for(int i=0;i<10;i++){
+        bmp180.startPressure(BMP180::ULTRA_LOW_POWER);
+        wait_ms(10);    // Wait for conversion to complete
+        int pressure;
+        if(bmp180.getPressure(&pressure) != 0) {
+            printf("Error getting pressure\n");
+        }
+        sum += pressure;
+    }
+    return sum/1000.0f;
+}
+
+float get_T()
+{
+    float sum = 0.0f;
+    for(int i=0;i<10;i++){
+        bmp180.startTemperature();
+        wait_ms(5);     // Wait for conversion to complete
+        float temp;
+        if(bmp180.getTemperature(&temp) != 0) {
+            printf("Error getting temperature\n");
+        }
+        sum += temp;
+    }
+    return sum/10.0f;
+}
+
+
+
+int main()
+{
+    while(1) {
+        if (bmp180.init() != 0) {
+            printf("Error communicating with BMP180\n");
+        } else {
+            printf("Initialized BMP180\n");
+            break;
+        }
+        wait(1);
+    }
+    float temp, pressure;
+    while(1) {
+        servo = 0.0;
+        if(xbee.readable()==0) {
+            wait(0.1);
+            continue;
+        }
+        char c = xbee.getc();
+        if(c == 'G') {
+            temp = get_T();
+            pressure = get_P();
+            xbee.printf("P%04.6fT%02.6f\n", pressure, temp);
+            printf("P%04.6fT%02.6f\n", pressure, temp);
+        }else if(c == 'O'){
+            led = 1;
+            servo.pulsewidth(0.002);
+            for(int i = 1;i<10;i++){
+                led = !led;
+                wait(0.1);
+            }
+        }
+        led = 0;
+        wait(1);
+    }
+}
+
+float calc(float x)
+{
+    return (1.45+(2.4-0.5)/180*x)/1000;
+}