*@Type Assignment based on STM32F4DISCOVERY board and FreeRTOS
*@Module Systems Programming for Embedded Devices(ELE00063M) @ University of York
*@Version V1.0
*@Student Bernard
*@Date March 2020
@Brief This is breadboard prototype of Bus Door Controller with following features:
* Setting the threshold current (LIMIT) via trimmer
* Measuring(simulate) motor current via trimmer
* Safety pressure switch
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By default, after powering up doors are CLOSING, hitting closed limit switch(SW8) changes the state of doors to CLOSED, toggle Open/Close switch(SW4) will change the state to OPENING, after opened limit switch(SW1) is pressed, state changes to OPENED. While Opening state user can triger SW4 to close the doors and vice versa. During the Closing state of the doors if the pressure switch is activated interrupts arrives, state goes to ERROR OBSTACLE, second press will simulate REMOVED OBSTACLE and doors will go to OPEN state Current state of the doors, set thershold current and measured motor current are printed on the 16x2 LCD display, additionally, position of the doors and motor direction are represented with LEDs
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For DEBUG purpose uncomment line #define DEBUG