Created ADC Control (markdown)

ADC-Control.md

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+# Wiring:
+* Use blue cable for steering and green cable for speed
+* Use 3.3v from programming port or a voltage regulator
+* If you don’t need steering, connect blue cable to ground, and set **STEERING_COEFFICIENT** to 0 in config.h
+* 100k Pull down resistors connected to ground are recommended to prevent issues when inputs are floating (wire is cut or disconnected)
+
+⚠ don’t use red wire it delivers 15v
+
+
+# Configuration:
+* If you use a joystick as input, enable **ADC1_MID_POT** and **ADC1_MID_POT** in config.h
+
+# Manual Calibration:
+* Connect FTDI to right sensor cable to read USART DEBUG values
+* Turn the potis to minimum position, write value 1: to **ADC1_MIN** and value 2: to **ADC2_MIN** in config.h
+* Turn the potis to maximum position, write value 1: to **ADC1_MAX** and value 2: to **ADC2_MAX** in config.h
+* For middle resting potis, let the potis in the middle resting position, write value 1: to **ADC1_MID** and value 2: to **ADC2_MID**
+
+Config.h values will be ignored if you have already used the auto-calibration procedure below.
+
+# Auto-calibration:
+Auto-calibration finds the minimum, middle and maximum values for ADC inputs.
+* press the power button for more than 5 sec and release after the beep sound
+* move the potentiometers freely to the min and max limits repeatedly
+* release potentiometers to the resting position
+* press the power button to confirm or wait for the 20 sec timeout
+
+The limits will be stored in flash memory and will be erased only if you fully delete memory before flashing.<br />
+An alternative to bypass those limits is to change **FLASH_WRITE_KEY** in config.h to a value different than 0x1234.
+
+⚠ Auto-calibration only works if both ADC are connected/used.
+
+
+# Extra Features
+## Setup current and speed limit:
+* press the power button for more than 5 sec and immediately after the beep sound press one more time shortly
+* move and hold the pots to a desired limit position for Current and Speed
+* press the power button to confirm or wait for the 10 sec timeout
+
+## Support of extra buttons:
+Uncomment #define **SUPPORT_BUTTONS_RIGHT** to use right sensor board cable for button inputs. Disable DEBUG_SERIAL_USART3!
+Variables button1 and button2 can be later used to implement different behavior
+
+