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mcp4728: Update to better match printrbot revf requirements

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Reported by @Grumps49.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-07-26 10:59:07 -04:00
parent 73709984b0
commit a878831d5e
3 changed files with 15 additions and 10 deletions
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17
config/example-extras.cfg
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@ -890,27 +890,28 @@
#i2c_mcu: mcu
# The name of the micro-controller that the MCP4451 chip is
# connected to. The default is "mcu".
#i2c_address:
#i2c_address: 96
# The i2c address that the chip is using on the i2c bus. The default
# is zero.
# is 96.
#channel_a:
#channel_b:
#channel_c:
#channel_d:
# The value to statically set the given MCP4728 channel to. This is
# typically set to a number between 0.0 and 1.0 with 1.0 being the
# highest voltage and 0.0 being the lowest voltage. However, the
# range may be changed with the 'scale' parameter (see below). If a
# channel is not specified then it is left unconfigured.
# highest voltage (2.048V) and 0.0 being the lowest voltage. However,
# the range may be changed with the 'scale' parameter (see
# below). If a channel is not specified then it is left
# unconfigured.
#scale:
# This parameter can be used to alter how the 'channel_x' parameters
# are interpreted. If provided, then the 'channel_x' parameters
# should be between 0.0 and 'scale'. This may be useful when the
# MCP4728 is used to set stepper voltage references. The 'scale' can
# be set to the equivalent stepper amperage if the MCP4728 were at
# its highest voltage, and then the 'channel_x' parameters can be
# specified using the desired amperage value for the stepper. The
# default is to not scale the 'channel_x' parameters.
# its highest voltage (2.048V), and then the 'channel_x' parameters
# can be specified using the desired amperage value for the
# stepper. The default is to not scale the 'channel_x' parameters.
# Statically configured MCP4018 digipot connected via two gpio "bit