chipmisc: Add support for statically configured output pins

Allow digital and PWM output pins to be setup via new config
sections.  This makes it easier to setup pin configurations.

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

4 files changed, 108 insertions, 60 deletions

diff --git a/config/example-extras.cfg b/config/example-extras.cfg
new file mode 100644
index 00000000..ec9de90b
--- /dev/null
+++ b/config/example-extras.cfg
@@ -0,0 +1,83 @@
+# This file serves as documentation for config parameters of
+# additional devices that may be configured on a printer. The snippets
+# in this file may be copied into the main printer.cfg file. See the
+# "example.cfg" file for description of common config parameters.
+
+
+# In a multi-extruder printer add an additional extruder section for
+# each additional extruder. The additional extruder sections should be
+# named "extruder1", "extruder2", "extruder3", and so on. See the
+# "extruder" section in example.cfg for a description of available
+# parameters.
+#[extruder1]
+#step_pin: ar36
+#dir_pin: ar34
+#...
+#deactivate_gcode:
+#   A list of G-Code commands (one per line) to execute on a G-Code
+#   tool change command (eg, "T1") that deactivates this extruder and
+#   activates some other extruder. It only makes sense to define this
+#   section on multi-extruder printers. The default is to not run any
+#   special G-Code commands on deactivation.
+#activate_gcode:
+#   A list of G-Code commands (one per line) to execute on a G-Code
+#   tool change command (eg, "T0") that activates this extruder. It
+#   only makes sense to define this section on multi-extruder
+#   printers. The default is to not run any special G-Code commands on
+#   activation.
+
+
+# Heater cooling fans (one may define any number of sections with a
+# "heater_fan" prefix). A "heater fan" is a fan that will be enabled
+# whenever its associated heater is active.
+#[heater_fan my_nozzle_fan]
+# See the "fan" section for fan configuration parameters.
+#pin: ar4
+# The remaining variables are specific to heater_fan.
+#heater: extruder
+#   Name of the config section defining the heater that this fan is
+#   associated with.  The default is "extruder".
+#heater_temp: 50.0
+#   A temperature (in Celsius) that the heater must drop below before
+#   the fan is disabled. The default is 50 Celsius.
+
+
+# Statically configured digital output pins (one may define any number
+# of sections with a "static_digital_output" prefix). Pins configured
+# here will be setup as a GPIO output during MCU configuration.
+#[static_digital_output my_output_pins]
+#pins:
+#   A comma separated list of pins to be set as GPIO output pins. The
+#   pin will be set to a high level unless the pin name is prefaced
+#   with "!". This parameter must be provided.
+
+
+# Statically configured PWM output pins (one may define any number of
+# sections with a "static_pwm_output" prefix). Pins configured here
+# will be setup as PWM outputs during MCU configuration.
+#[static_pwm_output my_output_pwm]
+#pin:
+#   The pin to configure as PWM output. This parameter must be
+#   provided.
+#value:
+#   The value to statically set the PWM output to. This is typically
+#   set to a number between 0.0 and 1.0 with 1.0 being full on and 0.0
+#   being full off. However, the range may be changed with the 'scale'
+#   parameter (see below). This parameter must be provided.
+#hard_pwm:
+#   Set this value to force hardware PWM instead of software PWM. Set
+#   to 1 to force a hardware PWM at the fastest rate; set to a higher
+#   number to force hardware PWM with the given cycle time in clock
+#   ticks. The default is to use software PWM.
+#cycle_time: 0.100
+#   The amount of time (in seconds) per PWM cycle when using software
+#   based PWM. The default is 0.100 seconds.
+#scale:
+#   This parameter can be used to alter how the 'value' parameter is
+#   interpreted. If provided, then the 'value' parameter should be
+#   between 0.0 and 'scale'. This may be useful when configuring a PWM
+#   pin that controls a stepper voltage reference. The 'scale' can be
+#   set to the equivalent stepper amperage if the PWM were fully
+#   enabled, and then the 'value' parameter can be specified using the
+#   desired amperage for the stepper. The default is to not scale the
+#   'value' parameter.
diff --git a/config/example.cfg b/config/example.cfg
index 4bb805db..32ece835 100644
--- a/config/example.cfg
+++ b/config/example.cfg
@@ -2,7 +2,8 @@
 # copy and edit this file to configure a new cartesian style
 # printer. For delta style printers, see the "example-delta.cfg"
 # file. For corexy/h-bot style printers, see the "example-corexy.cfg"
-# file.
+# file. Only common config sections are described here - see the
+# "example-extras.cfg" file for configuring less common devices.
 
 # DO NOT COPY THIS FILE WITHOUT CAREFULLY READING AND UPDATING IT
 # FIRST. Incorrectly configured parameters may cause damage.
@@ -150,18 +151,6 @@ filament_diameter: 3.500
 #   otherwise cause retraction followed immediately by pressure
 #   buildup. This setting only applies if pressure_advance is
 #   non-zero. The default is 0.010 (10 milliseconds).
-#deactivate_gcode:
-#   A list of G-Code commands (one per line) to execute on a G-Code
-#   tool change command (eg, "T1") that deactivates this extruder and
-#   activates some other extruder. It only makes sense to define this
-#   section on multi-extruder printers. The default is to not run any
-#   special G-Code commands on deactivation.
-#activate_gcode:
-#   A list of G-Code commands (one per line) to execute on a G-Code
-#   tool change command (eg, "T0") that activates this extruder. It
-#   only makes sense to define this section on multi-extruder
-#   printers. The default is to not run any special G-Code commands on
-#   activation.
 #
 # The remaining variables describe the extruder heater.
 heater_pin: ar10
@@ -217,15 +206,6 @@ max_temp: 210
 #   Maximum temperature (mcu will shutdown if temperature is above
 #   this value). This parameter must be provided.
 
-# In a multi-extruder printer add an additional extruder section for
-# each additional extruder. The additional extruder sections should be
-# named "extruder1", "extruder2", "extruder3", and so on. See the
-# "extruder" section above for a description of available parameters.
-#[extruder1]
-#step_pin: ar36
-#dir_pin: ar34
-#...
-
 # The heater_bed section describes a heated bed (if present - omit
 # section if not present).
 [heater_bed]
@@ -323,17 +303,3 @@ max_z_accel: 30
 #   centripetal velocity cornering algorithm. A larger number will
 #   permit higher "cornering speeds" at the junction of two moves. The
 #   default is 0.02mm.
-
-# Heater cooling fans (one may define any number of sections with a
-# "heater_fan" prefix). A "heater fan" is a fan that will be enabled
-# whenever its associated heater is active.
-#[heater_fan my_nozzle_fan]
-# See the "fan" section for fan configuration parameters.
-#pin: ar4
-# The remaining variables are specific to heater_fan.
-#heater: extruder
-#   Name of the config section defining the heater that this fan is
-#   associated with.  The default is "extruder".
-#heater_temp: 50.0
-#   A temperature (in Celsius) that the heater must drop below before
-#   the fan is disabled. The default is 50 Celsius.
diff --git a/config/generic-rambo.cfg b/config/generic-rambo.cfg
index f1cc0389..f01eb82f 100644
--- a/config/generic-rambo.cfg
+++ b/config/generic-rambo.cfg
@@ -77,19 +77,6 @@ pin: PH5
 [mcu]
 serial: /dev/ttyACM0
 custom:
-  # Turn off yellow led
-  set_digital_out pin=PB7 value=0
-  # Stepper micro-step pins
-  set_digital_out pin=PG1 value=1
-  set_digital_out pin=PG0 value=1
-  set_digital_out pin=PK7 value=1
-  set_digital_out pin=PG2 value=1
-  set_digital_out pin=PK6 value=1
-  set_digital_out pin=PK5 value=1
-  set_digital_out pin=PK3 value=1
-  set_digital_out pin=PK4 value=1
-  #set_digital_out pin=PK2 value=1
-  #set_digital_out pin=PK1 value=1
   # Initialize digipot
   send_spi_message pin=PD7 msg=0487 # X = ~0.75A
   send_spi_message pin=PD7 msg=0587 # Y = ~0.75A
@@ -103,3 +90,15 @@ max_velocity: 300
 max_accel: 3000
 max_z_velocity: 5
 max_z_accel: 100
+
+# Enable 16 micro-steps on steppers X, Y, Z, E0, E1
+[static_digital_output stepper_config]
+pins:
+    PG1, PG0,
+    PK7, PG2,
+    PK6, PK5,
+    PK3, PK4,
+    PK2, PK1
+
+[static_digital_output yellow_led]
+pins: !PB7
diff --git a/config/makergear-m2-2012.cfg b/config/makergear-m2-2012.cfg
index a2b0e89d..1bf72a54 100644
--- a/config/makergear-m2-2012.cfg
+++ b/config/makergear-m2-2012.cfg
@@ -77,17 +77,6 @@ hard_pwm: 1
 [mcu]
 serial: /dev/ttyACM0
 custom:
-  # Turn off yellow led
-  set_digital_out pin=PB7 value=0
-  # Stepper micro-step pins
-  set_digital_out pin=PG1 value=1
-  set_digital_out pin=PG0 value=1
-  set_digital_out pin=PK7 value=1
-  set_digital_out pin=PG2 value=1
-  set_digital_out pin=PK6 value=1
-  set_digital_out pin=PK5 value=1
-  set_digital_out pin=PK3 value=1
-  set_digital_out pin=PK4 value=1
   # Initialize digipot
   send_spi_message pin=PD7 msg=0487 # X = ~0.75A
   send_spi_message pin=PD7 msg=0587 # Y = ~0.75A
@@ -101,3 +90,14 @@ max_velocity: 500
 max_accel: 3000
 max_z_velocity: 25
 max_z_accel: 30
+
+# Enable 8 micro-steps on steppers X, Y, Z, E0
+[static_digital_output stepper_config]
+pins:
+    PG1, PG0,
+    PK7, PG2,
+    PK6, PK5,
+    PK3, PK4
+
+[static_digital_output yellow_led]
+pins: !PB7