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Created ADC Control (markdown)

Candas1
2020-10-25 13:53:08 +01:00
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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