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

Committer:
ohtsuka
Date:
2014-07-24
Revision:
5:f2944e456618
Parent:
4:4c01d79dd741

File content as of revision 5:f2944e456618:

#include "mbed.h"
#include "LPS331_I2C.h"

DigitalOut myled(LED1);
DigitalIn JP(p6);
LocalFileSystem local("local"); 

Timer t;

LPS331_I2C lps331(p9, p10, LPS331_I2C_SA0_HIGH); // 気圧センサ

int main() {
    char id;

    printf("start BBsat\r\n");
    JP.mode(PullUp);

    id = lps331.whoami();
    printf("id = %x\r\n", id);
    
    lps331.setResolution(LPS331_I2C_PRESSURE_AVG_512, LPS331_I2C_TEMP_AVG_128);
    lps331.setDataRate(LPS331_I2C_DATARATE_7HZ); // 7Hz(1秒間に7回更新)
    lps331.setActive(true); // 動作開始
              
    FILE *fp = fopen("/local/data.txt", "a");   // 「追記」でファイルを開く
    if(fp==NULL) {
        printf("fopen error.\r\n");
    }
    fprintf(fp,"BBsat start. **********\r\n");  // fprintf()は、ファイルに文字を出力
    fclose(fp);

    t.start();
    
    while(1) {
        int ms=0;       // リセットからの経過時間(単位:ミリ秒(MilliSecond)
        float pres=lps331.getPressure();    // 気圧
        float temp=lps331.getTemperature(); // 気温

        if(JP==0) {     // JPが0(GND)だったら、
            break;      //whileのループを終了
        }

        ms = t.read_ms(); //現在時刻を取得

        FILE *fp = fopen("/local/data.txt", "a");
        fprintf(fp,  "%10d,%6.2f,%4.1f\r\n", ms, pres, temp);   // 時刻,気圧,気温を出力
        fclose(fp);

        wait(0.05);     // LED点滅
        myled = 1;
        wait(0.05);
        myled = 0;
    }
}