void chart_drawCurve(Bitmap *bm, const chart_y_t *curve_y, int curve_cnt);
void chart_drawDots(Bitmap *bm, const chart_x_t *dots_x, const chart_y_t *dots_y, int cnt);
void chart_drawCurve(Bitmap *bm, const chart_y_t *curve_y, int curve_cnt);
void chart_drawDots(Bitmap *bm, const chart_x_t *dots_x, const chart_y_t *dots_y, int cnt);