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pedrolamaspedrolamas
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Update pinmap and documentation
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‎klipper_config/pinmap.md‎

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# ATmega644P Pinmap for Klipper Simulavr
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This document provides a comprehensive pinmap for the ATmega644P microcontroller and how its pins are configured in the Klipper simulavr setup based on the actual configuration files.
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## Pin Configuration Table
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| Pin # | Pin Code | Pin Function | Klipper Usage |
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|-------|----------|--------------------------|--------------------------|
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| 1 | PB0 | T0/XCK0 | stepper_x_step_pin |
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| 2 | PB1 | T1 | stepper_x_dir_pin |
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| 3 | PB2 | AIN0/INT2 | stepper_x_endstop_pin |
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| 4 | PB3 | AIN1/OC0A | stepper_y_step_pin |
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| 5 | PB4 | SS/OC0B | - |
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| 6 | PB5 | MOSI | - |
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| 7 | PB6 | MISO | - |
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| 8 | PB7 | SCK | - |
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| 9 | RESET | Reset (Active Low) | - |
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| 10 | GND | Ground | - |
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| 11 | VCC | +5V Power | - |
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| 12 | XTAL2 | Crystal Oscillator Pin 2 | - |
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| 13 | XTAL1 | Crystal Oscillator Pin 1 | - |
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| 14 | PC0 | SCL | - |
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| 15 | PC1 | SDA | - |
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| 16 | PC2 | TCK | stepper_y_dir_pin |
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| 17 | PC3 | TMS | stepper_y_endstop_pin |
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| 18 | PC4 | TDO | stepper_z_step_pin |
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| 19 | PC5 | TDI | stepper_z_dir_pin |
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| 20 | PC6 | TOSC1 | stepper_z_endstop_pin |
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| 21 | PC7 | TOSC2 | extruder_step_pin |
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| 22 | PD0 | RXD0 | - |
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| 23 | PD1 | TXD0 | - |
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| 24 | PD2 | RXD1/INT0 | - |
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| 25 | PD3 | TXD1/INT1 | - |
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| 26 | PD4 | OC1B | extruder_dir_pin |
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| 27 | PD5 | OC1A | extruder1_step_pin |
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| 28 | PD6 | OC2B/ICP1 | extruder1_dir_pin |
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| 29 | PD7 | OC2A | - |
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| 30 | GND | Analog Ground | - |
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| 31 | AVCC | Analog VCC | - |
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| 32 | AREF | Analog Reference | - |
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| 33 | PA7 | ADC7 | heater_bed_sensor_pin |
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| 34 | PA6 | ADC6 | extruder1_sensor_pin |
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| 35 | PA5 | ADC5 | extruder_sensor_pin |
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| 36 | PA4 | ADC4 | - |
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| 37 | PA3 | ADC3 | - |
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| 38 | PA2 | ADC2 | - |
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| 39 | PA1 | ADC1 | - |
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| 40 | PA0 | ADC0 | - |
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## Pin Usage Summary
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### Stepper Motors
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- **X-Axis Stepper**: PB0 (step), PB1 (direction), PB2 (endstop)
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- **Y-Axis Stepper**: PB3 (step), PC2 (direction), PC3 (endstop)
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- **Z-Axis Stepper**: PC4 (step), PC5 (direction), PC6 (endstop)
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### Extruders
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- **Primary Extruder**: PC7 (step), PD4 (direction), PA5 (sensor)
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- **Secondary Extruder**: PD5 (step), PD6 (direction), PA6 (sensor)
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### Temperature Sensors
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- **Heated Bed**: PA7 (sensor)
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- **Extruder**: PA5 (sensor)
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- **Extruder1**: PA6 (sensor)
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### Available Pins
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The following pins are currently unassigned and available for additional features:
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- PA0, PA1, PA2, PA3, PA4 (ADC channels)
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- PB4, PB5, PB6, PB7 (SPI interface)
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- PC0, PC1 (I²C/TWI interface)
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- PD0, PD1 (UART0)
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- PD2, PD3 (UART1)
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- PD7 (Digital I/O with PWM capability)
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### Communication Interfaces
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- **SPI**: PB4 (SS), PB5 (MOSI), PB6 (MISO), PB7 (SCK) - Available
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- **I²C/TWI**: PC0 (SCL), PC1 (SDA) - Available
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- **UART0**: PD0 (RX), PD1 (TX) - Available
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- **UART1**: PD2 (RX), PD3 (TX) - Available
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## Notes
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- This pinmap is designed for **simulavr simulation** with the Klipper firmware
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- The pin assignments are defined in the Klipper configuration files for virtual hardware simulation
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- Many functions (heaters, fans, enable pins) use virtual pins rather than physical pins
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- ADC channels (Port A) are used for temperature sensing simulation
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- JTAG debugging pins (PC2-PC6) and timer-related pins (PB0-PB1, PC6-PC7, PD4-PD6) are repurposed for stepper motor control
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- All hardware communication interfaces (SPI, I²C, UART) remain available for expansion
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- Pin assignments match the simulavr virtual ATmega644P implementation

‎klipper_config/printer/extruder-dual-stepper.cfg‎

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[extruder_stepper stepper1]
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extruder: extruder
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step_pin: PC3
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dir_pin: !PC4
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step_pin: PD5
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dir_pin: !PD6
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enable_pin: virtual_pin:extruder_stepper__stepper1__enable_pin
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microsteps: 16
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rotation_distance: 33.683
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[extruder_stepper stepper2]
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extruder: extruder
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step_pin: PC1
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dir_pin: !PC2
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step_pin: PC7
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dir_pin: !PD4
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enable_pin: virtual_pin:extruder_stepper__stepper2__enable_pin
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microsteps: 16
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rotation_distance: 33.683

‎klipper_config/printer/extruder-dual.cfg‎

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[extruder]
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step_pin: PC1
3-
dir_pin: !PC2
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step_pin: PC7
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dir_pin: !PD4
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enable_pin: virtual_pin:extruder__enable_pin
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microsteps: 16
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rotation_distance: 33.683
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max_extrude_only_velocity: 100
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[extruder1]
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step_pin: PC3
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dir_pin: !PC4
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step_pin: PD5
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dir_pin: !PD6
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enable_pin: virtual_pin:extruder1__enable_pin
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microsteps: 16
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rotation_distance: 33.683

‎klipper_config/printer/extruder-single.cfg‎

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[extruder]
2-
step_pin: PC1
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dir_pin: !PC2
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step_pin: PC7
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dir_pin: !PD4
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enable_pin: virtual_pin:extruder__enable_pin
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microsteps: 16
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rotation_distance: 33.683

‎klipper_config/printer/kinematics-cartesian-bltouch.cfg‎

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[stepper_y]
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step_pin: PB3
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dir_pin: !PB4
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dir_pin: !PC2
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enable_pin: virtual_pin:stepper_y__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PB5
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endstop_pin: ^PC3
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position_endstop: 0
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position_max: 235
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homing_speed: 100
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homing_retract_dist: 0
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[stepper_z]
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step_pin: PB6
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dir_pin: PB7
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step_pin: PC4
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dir_pin: PC5
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enable_pin: virtual_pin:stepper_z__enable_pin
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microsteps: 16
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rotation_distance: 40
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homing_retract_dist: 0
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[bltouch]
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sensor_pin: ^!PC0
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sensor_pin: ^!PC6
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control_pin: PA4
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z_offset: 0

‎klipper_config/printer/kinematics-cartesian-probe.cfg‎

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[stepper_y]
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step_pin: PB3
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dir_pin: !PB4
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dir_pin: !PC2
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enable_pin: virtual_pin:stepper_y__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PB5
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endstop_pin: ^PC3
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position_endstop: 0
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position_max: 235
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homing_speed: 100
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homing_retract_dist: 0
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[stepper_z]
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step_pin: PB6
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dir_pin: PB7
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step_pin: PC4
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dir_pin: PC5
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enable_pin: virtual_pin:stepper_z__enable_pin
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microsteps: 16
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rotation_distance: 40
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homing_retract_dist: 0
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[probe]
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pin: PC0
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pin: PC6
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z_offset: 0

‎klipper_config/printer/kinematics-cartesian.cfg‎

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[stepper_y]
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step_pin: PB3
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dir_pin: !PB4
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dir_pin: !PC2
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enable_pin: virtual_pin:stepper_y__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PB5
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endstop_pin: ^PC3
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position_endstop: 0
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position_max: 235
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homing_speed: 100
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homing_retract_dist: 0
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[stepper_z]
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step_pin: PB6
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dir_pin: PB7
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step_pin: PC4
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dir_pin: PC5
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enable_pin: virtual_pin:stepper_z__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PC0
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endstop_pin: ^PC6
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position_endstop: 0
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position_max: 250
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homing_retract_dist: 0

‎klipper_config/printer/kinematics-delta.cfg‎

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[stepper_b]
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step_pin: PB3
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dir_pin: !PB4
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dir_pin: !PC2
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enable_pin: virtual_pin:stepper_y__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PB5
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endstop_pin: ^PC3
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position_endstop: 0
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homing_speed: 100
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homing_retract_dist: 0
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arm_length: 315
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[stepper_c]
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step_pin: PB6
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dir_pin: PB7
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step_pin: PC4
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dir_pin: PC5
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enable_pin: virtual_pin:stepper_z__enable_pin
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microsteps: 16
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rotation_distance: 40
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endstop_pin: ^PC0
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endstop_pin: ^PC6
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position_endstop: 0
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homing_speed: 100
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homing_retract_dist: 0

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