46 lines
1.0 KiB
Markdown
46 lines
1.0 KiB
Markdown
# smctool
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A Linux userspace tool to read Apple SMC keys. Supports various data types and output formats.
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This tool is a part of the coreboot project.
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### Usage
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##### Main options
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```
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-h, --help: print help
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-k, --key <name>: key name
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-t, --type <type>: data type, see below
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```
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##### Output format options:
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```
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--output-hex: print value as a hexadecimal number
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--output-bin: print binary representation
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```
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##### Supported data types
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`ui8`, `ui16`, `ui32`, `si8`, `si16`, `flag`, `fpXY`, `spXY`
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**fp** and **sp** are unsigned and signed fixed point data types respectively.
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The `X` in **fp** and **sp** data types is integer bits count and `Y` is fraction bits count.
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For example: `fpe2` means 14 integer bits, 2 fraction bits, `sp78` means 7 integer bits, 8 fraction bits (and one sign bit).
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### Examples
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Reading battery level:
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```
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smctool -k B0FC -t ui16 # returns Full Capacity of Battery 0
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smctool -k B0RM -t ui16 # returns Remaining Capacity of Batery 0
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```
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Reading fan speed:
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```
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smctool -k F0Ac -t fpe2
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```
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### License
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GPLv2
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