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Diffstat (limited to 'config/example-extras.cfg')
| -rw-r--r-- | config/example-extras.cfg | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/config/example-extras.cfg b/config/example-extras.cfg index 14ea6391..5451eac5 100644 --- a/config/example-extras.cfg +++ b/config/example-extras.cfg @@ -778,6 +778,31 @@ # default is to not scale the 'channel_x' parameters. +# Statically configured MCP4018 digipot connected via two gpio "bit +# banging" pins (one may define any number of sections with an +# "mcp4018" prefix). +#[mcp4018 my_digipot] +#scl_pin: +# The SCL "clock" pin. This parameter must be provided. +#sda_pin: +# The SDA "data" pin. This parameter must be provided. +#wiper: +# The value to statically set the given MCP4018 "wiper" to. This is +# typically set to a number between 0.0 and 1.0 with 1.0 being the +# highest resistance and 0.0 being the lowest resistance. However, +# the range may be changed with the 'scale' parameter (see +# below). This parameter must be provided. +#scale: +# This parameter can be used to alter how the 'wiper' parameter is +# interpreted. If provided, then the 'wiper' parameter should be +# between 0.0 and 'scale'. This may be useful when the MCP4018 is +# used to set stepper voltage references. The 'scale' can be set to +# the equivalent stepper amperage if the MCP4018 is at its highest +# resistance, and then the 'wiper' parameter can be specified using +# the desired amperage value for the stepper. The default is to not +# scale the 'wiper' parameter. + + # Configure an SX1509 I2C to GPIO expander. Due to the delay incurred # by I2C communication you should NOT use SX1509 pins as stepper enable, # step or dir pins or any other pin that requires fast bit-banging. They |