pru: Add documentation and install scripts for running on the PRU

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

config/generic-cramps.cfg

@@ -0,0 +1,75 @@
+# This file contains an example configuration for a Beaglebone PRU
+# micro-controller attached to a CRAMPS board.
+
+# THIS FILE HAS NOT BEEN TESTED - PROCEED WITH CAUTION!
+
+# See the example.cfg file for a description of available parameters.
+
+[stepper_x]
+step_pin: P8_13
+dir_pin: P8_12
+enable_pin: !P9_14
+step_distance: .0125
+endstop_pin: ^P8_8
+homing_speed: 50
+position_endstop: 0
+position_max: 200
+
+[stepper_y]
+step_pin: P8_15
+dir_pin: P8_14
+enable_pin: !P9_14
+step_distance: .0125
+endstop_pin: ^P8_10
+homing_speed: 50
+position_endstop: 0
+position_max: 200
+
+[stepper_z]
+step_pin: P8_19
+dir_pin: P8_18
+enable_pin: !P9_14
+step_distance: 0.00025
+endstop_pin: ^P9_13
+homing_speed: 5
+position_endstop: 0
+position_max: 200
+
+[extruder]
+step_pin: P9_16
+dir_pin: P9_12
+enable_pin: !P9_14
+step_distance: .002
+nozzle_diameter: 0.400
+filament_diameter: 1.750
+heater_pin: P9_15
+sensor_type: EPCOS 100K B57560G104F
+sensor_pin: P9_36
+control: pid
+pid_Kp: 22.2
+pid_Ki: 1.08
+pid_Kd: 114
+min_temp: 0
+max_temp: 250
+
+[heater_bed]
+heater_pin: P8_11
+sensor_type: EPCOS 100K B57560G104F
+sensor_pin: P9_33
+control: watermark
+min_temp: 0
+max_temp: 130
+
+[fan]
+pin: P9_41
+
+[mcu]
+serial: /dev/rpmsg_30
+pin_map: beaglebone
+
+[printer]
+kinematics: cartesian
+max_velocity: 300
+max_accel: 3000
+max_z_velocity: 5
+max_z_accel: 100

config/generic-replicape.cfg

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+# This file contains an example configuration for the Beaglebone PRU
+# micro-controller.
+
+# THIS FILE HAS NOT BEEN TESTED - PROCEED WITH CAUTION!
+
+# See the example.cfg file for a description of available parameters.
+
+[stepper_x]
+step_pin: P8_17
+dir_pin: P8_26
+enable_pin: !P9_41
+step_distance: .0125
+endstop_pin: ^P9_25
+homing_speed: 50
+position_endstop: 0
+position_max: 200
+
+[stepper_y]
+step_pin: P8_12
+dir_pin: P8_19
+enable_pin: !P9_41
+step_distance: .0125
+endstop_pin: ^P9_23
+homing_speed: 50
+position_endstop: 0
+position_max: 200
+
+[stepper_z]
+step_pin: P8_13
+dir_pin: P8_14
+enable_pin: !P9_41
+step_distance: 0.00025
+endstop_pin: ^P9_13
+homing_speed: 5
+position_endstop: 0
+position_max: 200
+
+# XXX - Extruder heater hooked up to i2c mosfet
+#[extruder]
+#step_pin: P9_12
+#dir_pin: P8_15
+#enable_pin: !P9_41
+#step_distance: .002
+#nozzle_diameter: 0.400
+#filament_diameter: 1.750
+#heater_pin: ?
+#sensor_type: EPCOS 100K B57560G104F
+#sensor_pin: P9_39
+#control: pid
+#pid_Kp: 22.2
+#pid_Ki: 1.08
+#pid_Kd: 114
+#min_temp: 0
+#max_temp: 250
+
+# XXX - Bed heater hooked up to i2c mosfet
+#[heater_bed]
+#heater_pin: ?
+#sensor_type: EPCOS 100K B57560G104F
+#sensor_pin: P9_40
+#control: watermark
+#min_temp: 0
+#max_temp: 130
+
+# XXX - Fan power hooked up to i2c mosfet
+#[fan]
+#pin: ?
+
+[mcu]
+serial: /dev/rpmsg_30
+pin_map: beaglebone
+
+[printer]
+kinematics: cartesian
+max_velocity: 300
+max_accel: 3000
+max_z_velocity: 5
+max_z_accel: 100