Reset PID integral on brake config-option

Use RESET_PID_ON_BRAKE to reset the pid regulator if you are braking or
stop pedaling. If this config option is not active, the pid regulator
will slowly ramp down instead, which gives you a faster kick-in of the
motor if you release the brake or start pedaling again.

Author: jenkie

Arduino_Pedelec_Controller/Arduino_Pedelec_Controller.ino

@@ -751,7 +751,13 @@ void loop()
     if (power_set>curr_power_max*factor_speed)
     {power_set=curr_power_max*factor_speed;}                  //Maximum allowed power including Speed-Cutoff
     if ((((poti_stat<=throttle_stat)||(pedaling==false))&&(throttle_stat==0))||(brake_stat==0))  //integral part of PID regulator is slowly shrinked to 0 when you stop pedaling or brake
+    {
+#ifdef RESET_PID_ON_BRAKE
+      myPID.ResetIntegral();
+#else
       myPID.ShrinkIntegral();
+#endif
+    }
     else
     {
       pid_set=power_set;

Arduino_Pedelec_Controller/config.h

@@ -129,6 +129,7 @@ const int fixed_throttle_in_watts = 250;         //number of watts to set as thr
 // #define SUPPORT_HRMI         //uncomment if polar heart-rate monitor interface connected to i2c port
 #define SUPPORT_BRAKE        //uncomment if brake switch connected
 // #define INVERT_BRAKE         //uncomment if brake signal is low when not braking
+// #define RESET_PID_ON_BRAKE   //uncomment to reset the pid regulator if you are braking or stop pedaling. If this config option is not active, the pid regulator will slowly ramp down instead, which gives you a faster kick-in of the motor if you release the brake or start pedaling again
 #define DETECT_BROKEN_SPEEDSENSOR //detect broken speed sensor and disable motor (useful for legalisation)