Diff: main.cpp

Revision:

0:324e4a46d8ae

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jul 29 06:05:58 2020 +0000
@@ -0,0 +1,49 @@
+/*
+BMP280から気圧・温度を取得してCAN送信・シリアル送信．
+気圧->5回移動平均．
+<BMP280ピン設定>
+CSB : HIGH
+SDO : LOW
+*/
+#include "mbed.h"
+#include "BME280.h"
+
+BME280 bmp = BME280(PB_7, PB_6); // pin30,29 SDA,SCL
+Serial pc(PA_9, PA_10, 115200); // pin19,20 TX,RX
+
+#define N 5
+float pressure_ave = 0.0f; // 気圧[hPa]
+float pressure_new = 0.0f;
+float buff_p[N];
+float sum = 0.0f;
+int cnt = 0;
+float tem = 0.0f; // 温度[C]
+char senddata[5];
+union Float2Byte{
+    float _float;
+    char _byte[4];
+}f2b;
+
+int main(){
+    wait(0.1);
+    bmp.initialize();
+    for(int i;i<N;i++){
+        buff_p[i] = bmp.getPressure();
+        sum += buff_p[i];
+    }
+    pc.printf("Start.\n\r");
+    while(1){
+        sum = sum - buff_p[cnt];
+        pressure_new = bmp.getPressure();
+        buff_p[cnt] = pressure_new;
+        sum = sum + pressure_new;
+        cnt++;
+        if(cnt == N) cnt = 0;
+        pressure_ave = sum/N;
+        tem = bmp.getTemperature();
+        pc.printf("Pre[hPa]: %f\n\r", pressure_ave);
+        pc.printf("Tem[C] : %f\n\r", tem);
+        
+        wait(0.0005);
+    }
+}
\ No newline at end of file