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Arduino firmware that executes g-code like commands over a serial line to move the FarmBot and operate the tool mount

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farmbot-arduino-controller

This software is responsible for receiving G-Codes from the Raspberry Pi, executing them, and reporting back the results.

Technicals

Created with eclipseArduino V2 - For more details see http://www.baeyens.it/eclipse/

Command line flash tool installation

sudo apt-get install arduino gcc-avr avr-libc avrdude python-configobj python-jinja2 python-serial
mkdir tmp
cd tmp
git clone https://github.com/miracle2k/python-glob2
cd python-glob2
wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python
sudo python setup.py install
git clone git://github.com/amperka/ino.git
cd ino
sudo make install

Command line flash tool use

NOTE: We tag releases when they are stable. The latest version (on master) is not guaranteed to be stable.

See releases to find a stable release.

OPTION A: For less stable "edge" version:

git clone  https://github.com/FarmBot/farmbot-arduino-firmware

OPTION B: For stable release 1.0:

git clone -b 'alpha-1.0' --single-branch  https://github.com/FarmBot/farmbot-arduino-firmware

To flash the firmware onto the device, run this:

cd farmbot-arduino-firmware
ino build
ino upload

Software overview

All files are in /src

Farmbot_arduino_controller contains the setup() and main(). This is the main sequence:

      -------------------------- 
     |farmbot_arduino_controller|
      ----------- -------------- 
                 v
      -------------------------- 
     |Command                   |
      ----------- -------------- 
                 v
      -------------------------- 
     |GCodeProcessor            |
      ----------- -------------- 
                 v
      -------------------------- 
     |***Handler                |
      ------- ----------- ------ 
             |           |
             |            --- 
             v               v
      --------------     ----------- 
     |StepperControl|   | PinControl|
      --------------     ----------- 

Codes used for communication

Pin Numbering

RAMPS 1.4 (for other boards, see /src/pins.h)

Tag Pin Nr Comment
X_STEP_PIN 54 X axis step signal
X_DIR_PIN 55 X axis direction choice
X_ENABLE_PIN 38 X axis enable
X_MIN_PIN 3 X axis end stop at home position
X_MAX_PIN 2 X axis end stop at far position
X_ENCDR_A 16 X axis encoder A channel
X_ENCDR_B 17 X axis encoder B channel
X_ENCDR_A_Q 31 X axis encoder A channel for quarature (not implemented)
X_ENCDR_B_Q 33 X axis encoder B channel for quarature (not implemented)
Y_STEP_PIN 60 Y axis step signal
Y_DIR_PIN 61 Y axis direction choice
Y_ENABLE_PIN 56 Y axis enable
Y_MIN_PIN 14 Y axis end stop at home position
Y_MAX_PIN 15 Y axis end stop at far position
Y_ENCDR_A 23 Y axis encoder A channel
Y_ENCDR_B 25 Y axis encoder B channel
Y_ENCDR_A_Q 35 Y axis encoder A channel for quarature (not implemented)
Y_ENCDR_B_Q 37 Y axis encoder B channel for quarature (not implemented)
Z_STEP_PIN 46 Z axis step signal
Z_DIR_PIN 48 Z axis direction choice
Z_ENABLE_PIN 62 Z axis enable
Z_MIN_PIN 18 Z axis end stop at home position
Z_MAX_PIN 19 Z axis end stop at far position
Z_ENCDR_A 27 Z axis encoder A channel
Z_ENCDR_B 29 Z axis encoder B channel
Z_ENCDR_A_Q 39 Z axis encoder A channel for quarature (not implemented)
Z_ENCDR_B_Q 41 Z axis encoder B channel for quarature (not implemented)
LED_PIN 13 on board LED
FAN_PIN 9 RAMPS board fan pin
HEATER_0_PIN 10 RAMPS board heating pin 0
HEATER_1_PIN 8 RAMPS board heating pin 1
SERVO_0_PIN 4 Servo motor 0 signal pin
SERVO_1_PIN 5 Servo motor 1 signal pin

G-Codes

Codes sent to the arduino

Code type Number Parameters Function
G G-Code, the codes working the same as a 3D printer
G 00 X Y Z S Move to location at given speed for axis (don't have to be a straight line), in absolute coordinates
G 01 X Y Z S Move to location on a straight line
G 28 Move home all axis
F Farm commands, commands specially added for the farmbot
F 01 T Dose amount of water using time in millisecond
F 02 N Dose amount of water using flow meter that measures pulses
F 09 Reset emergency stop
F 11 Home X axis
F 12 Home Y axis
F 13 Home Z axis
F 14 Calibrate X axis
F 15 Calibrate Y axis
F 16 Calibrate Z axis
F 20 List all parameters and value
F 21 P Read parameter
F 22 P V Write parameter
F 23 P V Update parameter (during calibration)
F 31 P Read status
F 32 P V Write status
F 41 P V M Set a value V on an arduino pin in mode M (digital=0/analog=1)
F 42 P M Read a value from an arduino pin P in mode M (digital=0/analog=1)
F 43 P M Set the I/O mode M (input=0/output=1) of a pin P in arduino
F 44 P V W T M Set the value V on an arduino pin P, wait for time T in milliseconds, set value W on the arduino pin P in mode M (digital=0/analog=1)
F 51 E P V Set a value on the tool mount with I2C (not implemented)
F 52 E P Read value from the tool mount with I2C (not implemented)
F 61 P V Set the servo on the pin P (only pin 4 and 5) to the requested angle V
F 81 Report end stop
F 82 Report current position
F       83           Report software version
F         84     X Y Z     Set axis current position to zero (yes=1/no=0)
E                     Emergency stop

Codes received from the arduino

Code type Number Parameters Function
R Report messages
R 00 Idle
R 01 Current command started
R 02 Current command finished successfully
R 03 Current command finished with error
R 04 Current command running
R 05 X Y Z Report motor/axis state
R 06 X Y Z Report calibration state during execution
R 07 Retry movement
R 08 Command echo
R 09 Command invalid
R 11 X axis homing complete
R 12 Y axis homing complete
R 13 Z axis homing complete
R 20 Report all paramaters complete
R 21 P V Report parameter value
R 31 P V Report status value
R 41 P V Report pin value
R 81 XA XB YA YB ZA ZB Report end stops
R 82 X Y Z Report current position
R 83 Report software version
R 84 X Y Z Report encoder position scaled
R 85 X Y Z Report encoder position raw
R 87 Emergency lock
R 99 Debug message

Axis states (R05)

The state is reported for each axis individually, using the prefix X, Y or Z

Value Description
0 Idle
1 Starting motor
2 Accelerating
3 Cruising
4 Decelerating
5 Stopping motor
6 Crawling

Calibration states (R06)

The status for calibration is also reported for the axis that is calibrating

Value Description
0 Idle
1 Moving to home
2 Moving to end

Parameters for commands

Parameters Description Unit of Measurement
X X movement millimeters
Y Y movement millimeters
Z Z movement millimeters
A X speed steps/second
B Y speed steps/second
C Z speed steps/second
Q Queue number #
T Time seconds
N Number #
P Parameter/pin number #
V Value number #
W Secondary value #
E Element (in tool mount) #
M Mode (set pin mode) 0 = output / 1 = input
M Mode (read/write) 0 = digital / 1 = analog
XA End stop 1 on x axis 0/1
XB End stop 2 on x axis 0/1
YA End stop 1 on y axis 0/1
YB End stop 2 on y axis 0/1
ZA End stop 1 on z axis 0/1
ZB End stop 2 on z axis 0/1

Arduino parameter numbers

ID Name
2 PARAM_CONFIG_OK
3 PARAM_USE_EEPROM
4 PARAM_E_STOP_ON_MOV_ERR
5 PARAM_MOV_NR_RETRY
11 MOVEMENT_TIMEOUT_X
12 MOVEMENT_TIMEOUT_Y
13 MOVEMENT_TIMEOUT_Z
15 MOVEMENT_KEEP_ACTIVE_X
16 MOVEMENT_KEEP_ACTIVE_Y
17 MOVEMENT_KEEP_ACTIVE_Z
18 MOVEMENT_HOME_AT_BOOT_X
19 MOVEMENT_HOME_AT_BOOT_Y
20 MOVEMENT_HOME_AT_BOOT_Z
21 MOVEMENT_INVERT_ENDPOINTS_X
22 MOVEMENT_INVERT_ENDPOINTS_Y
23 MOVEMENT_INVERT_ENDPOINTS_Z
25 MOVEMENT_ENABLE_ENDPOINTS_X
26 MOVEMENT_ENABLE_ENDPOINTS_Y
27 MOVEMENT_ENABLE_ENDPOINTS_Z
31 MOVEMENT_INVERT_MOTOR_X
32 MOVEMENT_INVERT_MOTOR_Y
33 MOVEMENT_INVERT_MOTOR_Z
36 MOVEMENT_SECONDARY_MOTOR_X
37 MOVEMENT_SECONDARY_MOTOR_INVERT_X
41 MOVEMENT_STEPS_ACC_DEC_X
42 MOVEMENT_STEPS_ACC_DEC_Y
43 MOVEMENT_STEPS_ACC_DEC_Z
45 MOVEMENT_STOP_AT_HOME_X
46 MOVEMENT_STOP_AT_HOME_Y
47 MOVEMENT_STOP_AT_HOME_Z
51 MOVEMENT_HOME_UP_X
52 MOVEMENT_HOME_UP_Y
53   MOVEMENT_HOME_UP_Z
55   MOVEMENT_STEP_PER_MM_X
56   MOVEMENT_STEP_PER_MM_Y
57   MOVEMENT_STEP_PER_MM_Z
61   MOVEMENT_MIN_SPD_X
62 MOVEMENT_MIN_SPD_Y
63 MOVEMENT_MIN_SPD_Z
65 MOVEMENT_HOME_SPD_X
66 MOVEMENT_HOME_SPD_Y
67 MOVEMENT_HOME_SPD_Z
71 MOVEMENT_MAX_SPD_X
72 MOVEMENT_MAX_SPD_Y
73 MOVEMENT_MAX_SPD_Z
101 ENCODER_ENABLED_X
102 ENCODER_ENABLED_Y
103 ENCODER_ENABLED_Z
105 ENCODER_TYPE_X
106 ENCODER_TYPE_Y
107 ENCODER_TYPE_Z
111 ENCODER_MISSED_STEPS_MAX_X
112 ENCODER_MISSED_STEPS_MAX_Y
113 ENCODER_MISSED_STEPS_MAX_Z
115 ENCODER_SCALING_X
116 ENCODER_SCALING_Y
117 ENCODER_SCALING_Z
121 ENCODER_MISSED_STEPS_DECAY_X
122 ENCODER_MISSED_STEPS_DECAY_Y
123 ENCODER_MISSED_STEPS_DECAY_Z
125 ENCODER_USE_FOR_POS_X
126 ENCODER_USE_FOR_POS_Y
127 ENCODER_USE_FOR_POS_Z
131 ENCODER_INVERT_X
132 ENCODER_INVERT_Y
133 ENCODER_INVERT_Z
141 MOVEMENT_AXIS_NR_STEPS_X
142 MOVEMENT_AXIS_NR_STEPS_Y
143 MOVEMENT_AXIS_NR_STEPS_Z
145 MOVEMENT_STOP_AT_MAX_X
146 MOVEMENT_STOP_AT_MAX_Y
147 MOVEMENT_STOP_AT_MAX_Z
201 PIN_GUARD_1_PIN_NR
202 PIN_GUARD_1_TIME_OUT
203 PIN_GUARD_1_ACTIVE_STATE
205 PIN_GUARD_2_PIN_NR
206 PIN_GUARD_2_TIME_OUT
207 PIN_GUARD_2_ACTIVE_STATE
211 PIN_GUARD_3_PIN_NR
212 PIN_GUARD_3_TIME_OUT
213 PIN_GUARD_3_ACTIVE_STATE
215 PIN_GUARD_4_PIN_NR
216 PIN_GUARD_4_TIME_OUT
217 PIN_GUARD_4_ACTIVE_STATE
221 PIN_GUARD_5_PIN_NR
222 PIN_GUARD_5_TIME_OUT
223 PIN_GUARD_5_ACTIVE_STATE

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Arduino firmware that executes g-code like commands over a serial line to move the FarmBot and operate the tool mount

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