Li Weiyi / Mbed 2 deprecated BalanceCar

虽然移植完毕，但是不work。需要细调……

Dependencies:   mbed

Diff: Microduino_Stepper_PWM.cpp

Revision:
3:c6caae712d5d
Parent:
2:99785a1007a4
--- a/Microduino_Stepper_PWM.cpp	Tue Jun 07 05:26:03 2016 +0000
+++ b/Microduino_Stepper_PWM.cpp	Tue Jun 07 08:14:15 2016 +0000
@@ -133,7 +133,7 @@
     }
     else {
         gpio_write(&dirOUT, 1);
-        period = map(speed, -1200, -1, PERIOD_MIN, PERIOD_MAX);
+        period = map(speed, -1200, -1, PERIOD_MAX, PERIOD_MIN);
         pwmout_period_us(&pwmStep, period);
     }
     //stepperAllEnable();