File content as of revision 13:38c5ffe5873a:

#include "HMC6352.h"
#include "math.h"
#include "getGPS.h"
//#include <math.h>

#define M_PI 3.14  // とりあえず円周率を定義

Serial pc(USBTX, USBRX);
HMC6352 compass(D4, D5);
GPS gps(D1, D0);

int AngleGet() {
    while(1) {
    double angle;
    compass.setOpMode(HMC6352_CONTINUOUS, 1, 20);
    angle = compass.sample() / 10;

    double next_x;
    double next_y;
    double theta;
    double delta;
    //if(gps.getgps()) {
        pc.printf("%lf %lf\r\n", 0, 0);  //gps.latitude=0, gps.longitude=0
        next_x = 30;
        next_y = 30;
        theta = atan(next_x - 0 / next_y - 0) * 180 / M_PI;
        printf("%f", theta);
        delta = theta - angle;
        printf("%f-%f=%f\r\n", theta, angle, delta); 
        //}
        /*
        else {
                pc.printf("No data\r\n");//データ取得に失敗した場合
                wait(1);
        }
        */
        wait(2);
        }
}