Initial AON3D M2+ dual MCU configuration

- Octopus Pro: Motors (MOTOR0-7), bed heater (PA1), chamber heater (PB10)
- Azteeg X3: Thermistors, endstops, probe, fan, hotend heaters
- IDEX setup with external DM542T drivers
- Includes wiring documentation and swap guide

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/azteeg-to-octopus-mapping.md

@@ -0,0 +1,79 @@
+# Azteeg X3 → Octopus Pro Swap Guide
+
+**Do NOT install M0DIAG-M7DIAG jumpers**
+
+---
+
+## MOTORS (left to right on Octopus)
+
+| Motor | Axis | Step | Dir | Enable |
+|-------|------|------|-----|--------|
+| MOTOR0 | X (T0) | PF13 | PF12 | PF14 |
+| MOTOR1 | Y (left) | PG0 | PG1 | PF15 |
+| MOTOR2 | Z (left) | PF11 | PG3 | PG5 |
+| MOTOR3 | E0 (T0) | PG4 | PC1 | PA0 |
+| MOTOR4 | E1 (T1) | PF9 | PF10 | PG2 |
+| MOTOR5 | X2 (T1) | PC13 | PF0 | PF1 |
+| MOTOR6 | Y1 (right) | PE2 | PE3 | PD4 |
+| MOTOR7 | Z1 (right) | PE6 | PA14 | PE0 |
+
+---
+
+## ENDSTOPS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| X min endstop | → | PG6 |
+| X2 endstop | → | PG9 |
+| Y min endstop | → | PG10 |
+| Y1 endstop | → | PG11 |
+| Z min endstop | → | PG12 |
+| Z1 endstop | → | PG13 |
+
+---
+
+## THERMISTORS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Extruder 0 thermistor | → | PF4 |
+| Extruder 1 thermistor | → | PF5 |
+| Chamber thermistor | → | PF6 |
+| Bed thermistor | → | PF3 |
+
+---
+
+## HEATERS
+
+| Wire from Azteeg | Azteeg Pin | → | Octopus Pin |
+|------------------|------------|---|-------------|
+| Hotend 0 heater | ar10 | → | PA2 (HE0) |
+| Hotend 1 heater | ar9 | → | PA3 (HE1) |
+| Chamber heater | ar4 | → | PB10 (HE2) |
+| Bed heater | ar8 | → | PA1 (HB) |
+
+---
+
+## FANS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Enclosure fan | → | PD12 |
+
+---
+
+## PROBE
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Probe signal | → | PG15 |
+
+---
+
+## POWER
+
+| Wire from Azteeg | → | Octopus |
+|------------------|---|---------|
+| 24V + | → | VIN + |
+| 24V - | → | VIN - |
+| USB to Pi | → | USB-C |