dac084S085: SPI DAC DAC084S085 implementation (#5134)

Alligator Board Rev2 tested config sample.
Add example configuration file for Alligator board rev.3.

Signed-off-by: Lorenzo Franco <lorenzo.franco@lorenzing.com>

config/generic-alligator-r2.cfg

@@ -0,0 +1,147 @@
+# This file contains common pin mappings for Alligator (Rev.2) board.
+# To use this config, the firmware should be compiled for the Arduino
+# Due.
+
+# Remember flash procedure:
+# sudo /etc/init.d/alligator-manager --erase
+# sudo bossac -e -w -v -b -R -i -p ttyAMA0 klipper.bin
+# See alligator github for alligator manager:
+# https://github.com/3Dartists/alligator-manager
+
+# See docs/Config_Reference.md for a description of parameters.
+
+[static_digital_output DRV8825_microstepping]
+pins:PC10
+pins:PC29
+pins:PC19
+pins:PC18
+
+[dac084S085 stepper_digipot]
+enable_pin: PB14
+spi_bus: spi0
+# Scale the config so that the channel value can be specified in amps.
+# (For Alligator v2.0 boards, use 2.50)
+scale: 2.50
+# Channel A in this example is X, B is Y, C is Z, D is E0,1,2,3.
+channel_A: 1.5
+channel_B: 1.5
+channel_C: 1.5
+channel_D: 1.0
+# channel D will be the current used by all extruders if> 1
+
+[stepper_x]
+step_pin: PB24
+dir_pin: !PB25
+enable_pin: !PA15
+microsteps: 32 # number of microstep 16, 32
+rotation_distance: 16
+endstop_pin: ^!PC5
+position_endstop: -30
+position_max: 220
+position_min: -30
+homing_speed: 50
+
+[stepper_y]
+step_pin: PB22
+dir_pin: !PB23
+enable_pin: !PA15
+microsteps: 32
+rotation_distance: 16
+endstop_pin: ^!PC3
+position_endstop: -8
+position_min: -8
+position_max: 220
+homing_speed: 50
+
+[stepper_z]
+step_pin: PC27
+dir_pin: PC28
+enable_pin: !PA15
+microsteps: 32
+rotation_distance: 4
+endstop_pin: ^!PC2
+position_endstop: 0
+position_max: 240
+position_min: -1
+
+[extruder]
+step_pin: PC25
+dir_pin: PC26
+enable_pin: !PA15
+microsteps: 32
+rotation_distance: 7
+nozzle_diameter: 0.400
+filament_diameter: 1.750
+heater_pin: PA1
+sensor_pin: PA16 # PA16(near mcu) or PA24(near ethernet)
+sensor_type: ATC Semitec 104NT-4-R025H42G
+control: pid
+pid_kp: 15.572
+pid_ki: 0.446
+pid_kd: 136.064
+min_temp: 0
+max_temp: 270
+
+#[extruder1]
+#step_pin: PD3
+#dir_pin: !PD2
+#enable_pin: !PA15
+#microsteps: 32
+#heater_pin: PC22
+#sensor_pin: PB25
+
+#[extruder2]
+#step_pin: PD7
+#dir_pin: !PD6
+#enable_pin: !PA15
+#microsteps: 32
+#heater_pin: PC21
+#sensor_pin: PC28
+
+#[extruder3]
+#step_pin: PD9
+#dir_pin: !PD8
+#enable_pin: !PA15
+#microsteps: 32
+#heater_pin: PA29
+#sensor_pin: PC5
+
+[heater_bed]
+heater_pin: PA0
+sensor_type: EPCOS 100K B57560G104F
+sensor_pin: PA24 # PA16(near mcu) or PA24(near ethernet)
+control: pid
+pid_kp: 73.517
+pid_ki: 1.132
+pid_kd: 1193.728
+min_temp: 0
+max_temp: 130
+
+[fan]
+pin: PA7
+
+#[heater_fan fan1]
+#pin: PA5
+#heater: extruder
+
+[output_pin BEEPER_pin]
+pin: PB19
+pwm: True
+value: 0
+shutdown_value: 0
+cycle_time: 0.1
+scale: 1000
+
+[mcu]
+serial: /dev/ttyAMA0
+
+[printer]
+kinematics: cartesian
+max_velocity: 300
+max_accel: 1000
+max_z_velocity: 20
+max_z_accel: 100
+
+#[bltouch]
+#sensor_pin: ^PC6
+#control_pin: PC4

config/generic-alligator-r3.cfg

@@ -0,0 +1,135 @@
+# This file contains common pin mappings for Alligator (Rev.3) board.
+# To use this config, the firmware should be compiled for the Arduino
+# Due.
+
+# Remember flash procedure:
+# sudo /etc/init.d/alligator-manager --erase
+# sudo bossac -e -w -v -b -R -i -p ttyAMA0 klipper.bin
+# See alligator github for alligator manager:
+# https://github.com/3Dartists/alligator-manager
+
+# See docs/Config_Reference.md for a description of parameters.
+
+[static_digital_output DRV8825_microstepping]
+pins:PC10
+pins:PC29
+pins:PC19
+pins:PC18
+
+[dac084S085 stepper_digipot]
+enable_pin: PD2
+spi_bus: spi0
+# Scale the config so that the channel value can be specified in amps.
+# (For Alligator v3.0 boards, use 2.50)
+scale: 2.50
+# Channel A in this example is X, B is Y, C is Z, D is E0,1,2,3.
+channel_A: 1.5
+channel_B: 1.5
+channel_C: 1.5
+channel_D: 1.0
+# channel D will be the current used by all extruders if> 1
+
+[stepper_x]
+step_pin: PB24
+dir_pin: !PB25
+enable_pin: !PA15
+microsteps: 32 # number of microstep 16, 32
+rotation_distance: 16
+endstop_pin: ^!PC5
+position_endstop: -30
+position_max: 220
+position_min: -30
+homing_speed: 50
+
+[stepper_y]
+step_pin: PB22
+dir_pin: !PB23
+enable_pin: !PC28
+microsteps: 32
+rotation_distance: 16
+endstop_pin: ^!PC3
+position_endstop: -8
+position_min: -8
+position_max: 220
+homing_speed: 50
+
+[stepper_z]
+step_pin: PB20
+dir_pin: PB21
+enable_pin: !PA29
+microsteps: 32
+rotation_distance: 4
+endstop_pin: ^!PC2
+position_endstop: 0
+position_max: 240
+position_min: -1
+
+[extruder]
+step_pin: PB18
+dir_pin: PB19
+enable_pin: !PC27
+microsteps: 32
+rotation_distance: 7
+nozzle_diameter: 0.400
+filament_diameter: 1.750
+heater_pin: PA19
+sensor_pin: PC25
+sensor_type: ATC Semitec 104NT-4-R025H42G
+control: pid
+pid_kp: 15.572
+pid_ki: 0.446
+pid_kd: 136.064
+min_temp: 0
+max_temp: 270
+
+#[extruder1]
+#step_pin: PB17
+#dir_pin: !PB14
+#enable_pin: !PD6
+#microsteps: 32
+#heater_pin: PC22
+#sensor_pin: PA29
+
+#[extruder2]
+#step_pin: PB12
+#dir_pin: !PB13
+#enable_pin: !PD8
+#microsteps: 32
+#heater_pin: PC21
+#sensor_pin: PC28
+
+#[extruder3]
+#step_pin: PB15
+#dir_pin: !PB16
+#enable_pin: !PD9
+#microsteps: 32
+#heater_pin: PA29
+#sensor_pin: PB25
+
+[heater_bed]
+heater_pin: PA0
+sensor_type: EPCOS 100K B57560G104F
+sensor_pin: PA8
+control: pid
+pid_kp: 73.517
+pid_ki: 1.132
+pid_kd: 1193.728
+min_temp: 0
+max_temp: 130
+
+[fan]
+pin: PA7
+
+#[heater_fan fan1]
+#pin: PA5
+#heater: extruder
+
+[mcu]
+serial: /dev/ttyAMA0
+
+[printer]
+kinematics: cartesian
+max_velocity: 300
+max_accel: 1000
+max_z_velocity: 20
+max_z_accel: 100

klippy/extras/dac084S085.py

@@ -0,0 +1,25 @@
+# SPI DAC DAC084S085 implementation
+#
+# Copyright (C) 2021  Lorenzo Franco <lorenzo.franco@lorenzing.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+from . import bus
+
+class dac084S085:
+    def __init__(self, config):
+        self.spi = bus.MCU_SPI_from_config(
+            config, 1, pin_option="enable_pin", default_speed=10000000)
+        scale = config.getfloat('scale', 1., above=0.)
+        for chan, name in enumerate("ABCD"):
+            val = config.getfloat('channel_%s' % (name,), None,
+                                   minval=0., maxval=scale)
+            if val is not None:
+                self.set_register(chan, int(val * 255. / scale))
+    def set_register(self, chan, value):
+        b1 = (chan << 6) | (1 << 4) | ((value >> 4) & 0x0f)
+        b2 = (value << 4) & 0xf0
+        self.spi.spi_send([b1, b2])
+
+def load_config_prefix(config):
+    return dac084S085(config)

test/klippy/printers.test

@@ -95,6 +95,8 @@ CONFIG ../../config/generic-printrboard-g2.cfg
 
 # Printers using the sam3x8e
 DICTIONARY sam3x8e.dict
+CONFIG ../../config/generic-alligator-r2.cfg
+CONFIG ../../config/generic-alligator-r3.cfg
 CONFIG ../../config/generic-archim2.cfg
 CONFIG ../../config/generic-radds.cfg
 CONFIG ../../config/generic-ruramps-v1.3.cfg