IOCAN

# Configuring Inputs

An **input** brings a value into the controller — from a physical pin, the CAN

bus, or computed from other inputs. Every input shares the

[Common IO Settings](Common-IO-Settings.md); each type adds its own options.

Inputs fall into three groups.

## Physical (hardware-pin) inputs

| Input | Reads | Page |

|---|---|---|

| Analog Input | Analog voltage on a pin | [inputs/Analog-Input.md](inputs/Analog-Input.md) |

| Digital Input | On/off (shorted to sGND) with debounce/invert | [inputs/Digital-Input.md](inputs/Digital-Input.md) |

| Frequency Input | Frequency, speed, duty or pulse time from a pin | [inputs/Frequency-Input.md](inputs/Frequency-Input.md) |

| Analog Switch Input | Resistor-ladder / voltage switch | [inputs/Analog-Switch-Input.md](inputs/Analog-Switch-Input.md) |

## Communication inputs

| Input | Reads | Page |

|---|---|---|

| CAN Bus Input | A signal from a raw CAN frame | [inputs/CAN-Bus-Input.md](inputs/CAN-Bus-Input.md) |

| CAN Object Input | A named object provided by a CAN Preset | [inputs/CAN-Object-Input.md](inputs/CAN-Object-Input.md) |

See [Working with the CAN Bus](Working-with-the-CAN-Bus.md).

## Computed / logical / virtual inputs

| Input | Produces | Page |

|---|---|---|

| Constant Value Input | A fixed value | [inputs/Constant-Value-Input.md](inputs/Constant-Value-Input.md) |

| Compare Input | A boolean (1024 / 0) from a comparison | [inputs/Compare-Input.md](inputs/Compare-Input.md) |

| Math / Divide Input | Maths between two inputs | [inputs/Math-Divide-Input.md](inputs/Math-Divide-Input.md) |

| Map Input | 1D lookup on another input | [inputs/Map-Input.md](inputs/Map-Input.md) |

| Mux Input | Selects 1 of 8 inputs | [inputs/Mux-Input.md](inputs/Mux-Input.md) |

| Counter Input | Up/down/reset counter | [inputs/Counter-Input.md](inputs/Counter-Input.md) |

| Waveform Input | Time-based generated signal | [inputs/Waveform-Input.md](inputs/Waveform-Input.md) |

| RBC Input | Decodes Gray code from a set of bit inputs | [inputs/RBC-Input.md](inputs/RBC-Input.md) |

| Virtual Input | Value set from the datalogger (USB sliders) | [inputs/Virtual-Input.md](inputs/Virtual-Input.md) |

| System Input | A system value, selected by pin | [inputs/System-Input.md](inputs/System-Input.md) |

_Not documented here: Test Input and AHRS Input (developer/diagnostic), Current

Sense Input (diagnostic), QEI Input (diff-controller only), and the internal

template-only types Gear Ratio Calculator and Clutch Slip Counter. Duty

measurement is covered by the **Frequency Input** (Duty mode), and the legacy

standalone Frequency/Duty inputs are folded into it._