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Configuration


The Art-Net configuration is stored in the file 'artnet.txt'.

Parameter name
 Description
net
 Bits 14-8 of the 15 bit Port-Address are encoded into the bottom 7 bits of this field. (default = 0)
subnet
 Bits 7-4 of the 15 bit Port-Address are encoded into the bottom 4 bits of this field. (default = 0)
universe
 Bits 3-0 of the 15 bit Port-Address. (default = 0)
short_name
 Default = 'AvV Art-Net Node'
long_name Default = 'Raspberry Pi Art-Net 3 L6470 Stepper Motor Controller'
manufacturer_id Default = 7FF0 (RESERVED FOR PROTOTYPING/EXPERIMENTAL USE ONLY)
oem_value Default = 20E0 (OemArtRelay)

The SlushEngine configuration is stored in the file 'slush.txt'
Parameter nameDescription
dmx_start_address_port_a DMX start address I/O Port A (8-channels). DMX value < 127 is OFF, DMX value >= 127 is ON
dmx_footprint_port_a DMX Footprint. Valid values: 1, 2, 3, 4, 5, 6, 7, 8
dmx_slot_info_port_a Valid values see ANSI E1.20, Appendix C: Slot Info (Normative). Format: [Slot ID Type]:[Slot Category/ID]
dmx_start_address_port_b DMX start address I/O Port B (8-channels). DMX value < 127 is OFF, DMX value >= 127 is ON
dmx_footprint_port_b DMX Footprint. Valid values: 1, 2, 3, 4, 5, 6, 7, 8
dmx_slot_info_port_b Valid values see ANSI E1.20, Appendix C: Slot Info (Normative). Format: [Slot ID Type]:[Slot Category/ID]

Example:
dmx_start_address_port_a=5
dmx_footprint_port_a=1
# Relay or power control
dmx_slot_info_port_a=00:0505

The SparkFun AutoDriver configuration is stored in the file 'sparkfun.txt'
Parameter nameDescription
sparkfun_spi_csThe SPI0 chip select pin: 0 (CE0) , 1 (CE1). Can be overridden in file 'motor%.txt'
sparkfun_reset_pin The BCM GPIO pin for the board reset input. (default = 20, Header P1-38).
sparkfun_busy_pin The BCM GPIO pin for the board busy output. (optional)

The motor configuration is stored in the file 'motor%.txt', where % can be 0, 1, 2, 3.
SparkFun AutoDriver only
Parameter nameDescription
sparkfun_spi_cs The SPI0 chip select pin: 0 (CE0) , 1 (CE1)
sparkfun_position The board position in the chain. Values: 0, 1, 2, 3
DMX settings
Parameter nameDescription
dmx_mode Operation mode. Starts with 0, Mode 0
dmx_start_address Dmx start address of the mode selected
dmx_slot_info Valid values see ANSI E1.20, Appendix C: Slot Info (Normative). Format: [Slot ID Type]:[Slot Category/ID],[Slot ID Type]:[Slot Category/ID]...

DMX Mode parameters. Used with limit switch : goUntil(act, dir, sps)
Parameter nameDescription
mode_max_steps Maximum steps from home position
mode_switch_act Valid values: reset, copy
mode_switch_dir Valid values: reverse, forward
mode_switch_sps Steps per second
mode_switch Use limit switch {default=yes , 0=no}
Motor parameters
Parameter nameDescription
motor_step_angel Degrees
motor_voltage V Volt
motor_current A Ampére
motor_resistance R Ohm
motor_inductance mH Henry
L6470 register set when parameters are set:
For the details see AN4144 Application note : Voltage mode control operation and parameter optimization
RegisterParameters
INT_SPEED motor_resistance , motor_inductance
L6470 parameters
Note: These settings will override the registers set by the motor parameters.
Parameter nameL6470 Parameter
l6470_min_speed MIN_SPEED (0x08)
l6470_max_speed MAX_SPEED (0x07)
l6470_acc ACC (0x05)
l6470_dec DECEL (0x06)
l6470_kval_hold KVAL_HOLD (0x09)
l6470_kval_run KVAL_RUN (0x0A)
l6470_kval_acc KVAL_ACC (0x0B)
l6470_kval_dec KVAL_DEC (0x0C)
l6470_micro_steps Valid values 1, 2, 4, 8, 16, 32, 64, 128

Example #1:
l6470_kval_hold=50
l6470_kval_run=50
l6470_kval_acc=50
l6470_kval_dec=50
#l6470_min_speed=25
l6470_max_speed=800
l6470_micro_steps=1
l6470_micro_steps=4
#
motor_step_angel=1.8
motor_resistance=2.3
motor_inductance=1.8
#
dmx_mode=4
dmx_start_address=1
dmx_slot_info=00:0101
# mode 4, mode 5 settings
#
mode_max_steps=800
#
# Use limit switch {default=yes , 0=no}
mode_switch=0
# goUntil(act, dir, sps)
#
# copy, reset
#mode_switch_act=
# reverse, forward
#mode_switch_dir=
# Steps per second
#mode_switch_sps
Example #2:
l6470_kval_hold=60
l6470_kval_run=60
l6470_kval_acc=60
l6470_kval_dec=60
#l6470_min_speed=25
l6470_max_speed=400
#l6470_micro_steps=1
l6470_micro_steps=4
#
motor_step_angel=1.8
motor_resistance=2.3
motor_inductance=1.8
#
dmx_mode=5
dmx_start_address=3
dmx_slot_info=00:0402,01:0002
# mode 4, mode 5 settings
#
mode_max_steps=800
#
# Use limit switch {default=yes , 0=no}
mode_switch=0
# goUntil(act, dir, sps)
#
# copy, reset
#mode_switch_act=
# reverse, forward
#mode_switch_dir=
# Steps per second
#mode_switch_sps

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