Toru OHTSUKA / Mbed 2 deprecated BBsatLPS331

This program is for Cansat made with BreadBoard which have pressure sensor LPS331. This program is based on http://mbed.org/users/nyamfg/code/LPS331_HelloWorld/

Dependencies:   mbed

main.cpp@7:8407141d1f70, 2014-09-08 (annotated)

Committer:
ohtsuka
Date:
Mon Sep 08 01:54:25 2014 +0000
Revision:
7:8407141d1f70
Parent:
6:496f4e967298
Child:
8:505d06bba7b1
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
nyamfg 0:1a3c5ad01539 1 #include "mbed.h"
ohtsuka 7:8407141d1f70 2 #include <math.h>
nyamfg 0:1a3c5ad01539 3 #include "LPS331_I2C.h"
nyamfg 0:1a3c5ad01539 4
ohtsuka 7:8407141d1f70 5 //気圧計算用
ohtsuka 7:8407141d1f70 6 #define P0 1013.25f //海面気圧(hPa)
ohtsuka 7:8407141d1f70 7 #define TEMP 20 //気温(度)
ohtsuka 7:8407141d1f70 8
ohtsuka 4:4c01d79dd741 9 DigitalOut myled(LED1);
ohtsuka 6:496f4e967298 10 DigitalOut JPlow(p5); // p6ピンでLowを検出させるために使用。隣同士(p5,p6)のピンをショートさせるとログ出力停止
ohtsuka 3:cb51cc4a041d 11 DigitalIn JP(p6);
ohtsuka 3:cb51cc4a041d 12 LocalFileSystem local("local");
ohtsuka 4:4c01d79dd741 13
ohtsuka 3:cb51cc4a041d 14 Timer t;
nyamfg 0:1a3c5ad01539 15
ohtsuka 4:4c01d79dd741 16 LPS331_I2C lps331(p9, p10, LPS331_I2C_SA0_HIGH); // 気圧センサ
ohtsuka 4:4c01d79dd741 17
nyamfg 0:1a3c5ad01539 18 int main() {
ohtsuka 6:496f4e967298 19 JPlow = 0;
ohtsuka 4:4c01d79dd741 20 JP.mode(PullUp);
ohtsuka 4:4c01d79dd741 21
nyamfg 0:1a3c5ad01539 22 lps331.setResolution(LPS331_I2C_PRESSURE_AVG_512, LPS331_I2C_TEMP_AVG_128);
ohtsuka 4:4c01d79dd741 23 lps331.setDataRate(LPS331_I2C_DATARATE_7HZ); // 7Hz(1秒間に7回更新)
ohtsuka 4:4c01d79dd741 24 lps331.setActive(true); // 動作開始
ohtsuka 3:cb51cc4a041d 25
ohtsuka 4:4c01d79dd741 26 FILE *fp = fopen("/local/data.txt", "a"); // 「追記」でファイルを開く
ohtsuka 4:4c01d79dd741 27 fprintf(fp,"BBsat start. **********\r\n"); // fprintf()は、ファイルに文字を出力
ohtsuka 3:cb51cc4a041d 28 fclose(fp);
nyamfg 0:1a3c5ad01539 29
ohtsuka 3:cb51cc4a041d 30 t.start();
nyamfg 2:70ce034cfcfc 31
ohtsuka 4:4c01d79dd741 32 while(1) {
ohtsuka 4:4c01d79dd741 33 int ms=0; // リセットからの経過時間(単位:ミリ秒(MilliSecond)
ohtsuka 4:4c01d79dd741 34 float pres=lps331.getPressure(); // 気圧
ohtsuka 4:4c01d79dd741 35 float temp=lps331.getTemperature(); // 気温
ohtsuka 7:8407141d1f70 36 float height; // 高度
ohtsuka 3:cb51cc4a041d 37
ohtsuka 7:8407141d1f70 38 //★デバッグ用
ohtsuka 7:8407141d1f70 39 pres = 900;
ohtsuka 7:8407141d1f70 40
ohtsuka 7:8407141d1f70 41 height = ( (powf((P0/pres),1/5.257f)-1)*(TEMP+273.15) ) / 0.0065f;
ohtsuka 7:8407141d1f70 42 printf("height = %5.1f\r\n", height);
ohtsuka 7:8407141d1f70 43
ohtsuka 4:4c01d79dd741 44 if(JP==0) { // JPが0(GND)だったら、
ohtsuka 4:4c01d79dd741 45 break; //whileのループを終了
ohtsuka 3:cb51cc4a041d 46 }
ohtsuka 3:cb51cc4a041d 47
ohtsuka 4:4c01d79dd741 48 ms = t.read_ms(); //現在時刻を取得
ohtsuka 3:cb51cc4a041d 49
ohtsuka 4:4c01d79dd741 50 FILE *fp = fopen("/local/data.txt", "a");
ohtsuka 7:8407141d1f70 51 fprintf(fp, "%10d,%6.2f,%4.1f,%5.1f\r\n", ms, pres, temp, height); // 時刻,気圧,気温を出力
ohtsuka 3:cb51cc4a041d 52 fclose(fp);
ohtsuka 4:4c01d79dd741 53
ohtsuka 4:4c01d79dd741 54 wait(0.05); // LED点滅
ohtsuka 4:4c01d79dd741 55 myled = 1;
ohtsuka 3:cb51cc4a041d 56 wait(0.05);
ohtsuka 4:4c01d79dd741 57 myled = 0;
nyamfg 0:1a3c5ad01539 58 }
nyamfg 0:1a3c5ad01539 59 }