Diff: main.cpp

Revision:

0:0ff20d8e9090

Child:

1:b9ea35d93329

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 07 05:17:35 2016 +0000
@@ -0,0 +1,32 @@
+#include "mbed.h"
+#include "math.h"
+#include "BMP180.h"
+#define p0 1013.25f//海面気圧
+
+DigitalOut myled(LED1);
+Serial pc(USBTX,USBRX);
+BMP180 bmp(PB_7, PB_6);
+Timer timer;
+
+float getAlt(float press, float temp);
+
+int main() {
+    float pressure,temperature,altitude;
+    float time;   
+    bmp.Initialize(64,BMP180_OSS_ULTRA_LOW_POWER);
+    pc.printf("time, temperature ,pressure, altitude\r\n");
+    timer.start();
+    
+    while(1) {
+        bmp.ReadData(&temperature,&pressure);
+        altitude = getAlt(pressure,temperature);
+        time = timer.read();
+        pc.printf("%f, %f, %f, %f \r\n",time, temperature, pressure, altitude);
+        myled =! myled;
+        wait(1);
+    }
+}
+
+float getAlt(float press, float temp){
+    return (pow((p0/press), (1.0f/5.257f))-1.0f)*(temp+273.15f)/0.0065f;
+}
\ No newline at end of file