Sharp GP2 familly distance sensor library
Dependents: FRC_2018 0hackton_08_06_18 0hackton_08_06_18_publish Kenya_2019 ... more
Diff: GP2A.h
- Revision:
- 4:4f443a6a6843
- Parent:
- 3:dcd04d9d0eb7
- Child:
- 5:49fb7016797c
--- a/GP2A.h Tue May 22 17:15:37 2018 +0000 +++ b/GP2A.h Thu May 31 17:25:25 2018 +0000 @@ -33,8 +33,8 @@ * axis. * The slope parameter must be computed by user unless the GP2 reference is * listed in the list below : - * - GP2Y0A02YK0F (Min = 30cm, Max = 150cm, Slope = 60) - * - GP2Y0A21YK0F (Min = 7cm, Max = 80cm, Slope = 20.88) + * - GP2Y0A02YK0F (Min = 30cm, Max = 150cm, Slope = 55) + * - GP2Y0A21YK0F (Min = 7cm, Max = 80cm, Slope = 10) * * You may add others sensors if you wish it * @@ -50,8 +50,8 @@ * Slope definitions for common GP2A sensors */ -#define GP2Y0A02YK0F 60.0 -#define GP2Y0A21YK0F 20.888 +#define GP2Y0A02YK0F 55.0 +#define GP2Y0A21YK0F 10 /** * Includes : Mbed library @@ -69,10 +69,11 @@ /** * Constructor of a Sharp GP2 Familly object. * - * @param vmes : the Mbed pin used to connect with GP2A sensor - * @param dMin : the GP2A sensor min distance to mesure - * @param dMax : the GP2A sensor max distance to mesure - * @param slope : the slope of the linear part of the graph V = f(1/d) + * @param vmes (PinName) : the Mbed pin used to connect with GP2A sensor + * @param dMin (double) : the GP2A sensor min distance to mesure + * @param dMax (double) : the GP2A sensor max distance to mesure + * @param slope (double) : the slope of the linear part of the graph V = f(1/d) + * @note you better use slope value that I've put above */ GP2A(PinName vmes, float dMin, float dMax, float slope); @@ -80,6 +81,8 @@ * Return the distance to target mesured by sensor in cm * * @return Distance in cm + * @note Distance is (very) approximative, to have a better mesurment I recommand an averaging of at least 5 measures + * @note you may get a new mesurment every 50ms */ double getDistance (void);