1SPI-CONFIG(1)                    User Commands                   SPI-CONFIG(1)
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NAME

6       spi-config - set or query SPI configuration.
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SYNOPSIS

9       spi-config options...
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DESCRIPTION

12       Set or query the configuration of a SPI port.
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14       -d, --device=DEVICE
15              use the given Linux spidev character device.
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17       -q, --query
18              print the current configuration.
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20       -m, --mode=[0-3]
21              set the spi mode (see SPI MODES below).
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23       -l, --lsb={0,1}
24              set LSB first (1) or MSB first (0).
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26       -b, --bits=[7...]
27              set the number of bits per word.
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29       -s, --speed=FREQUENCY
30              set clock frequency (in Hz).
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32       -r, --spirdy={0,1}
33              set the SPI READY mode flag.
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35       -s, --wait
36              block, keeping the file descriptor open. See WAIT OPTION below.
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38       -h, --help
39              display the help screen and exit.
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41       -v, --version
42              display the version number and exit.
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45   SPI MODES
46       mode 0 low iddle level, sample on leading edge.
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48       mode 1 low iddle level, sample on trailing edge.
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50       mode 2 high iddle level, sample on leading edge.
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52       mode 3 high iddle level, sample on trailing edge.
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55   WAIT OPTION
56       On  some platforms, the speed is reset to a default value when the file
57       descriptor is closed.  To avoid this, one can use the  -w  option  that
58       keeps the file descriptor open. See also last example below.
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EXAMPLES

61       Get help:
62              $ spi-config -h
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64       Query current configuration:
65              $ spi-config --device=/dev/spidev0.0 -q
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67       Change clock frequency to 1 MHz:
68              $ spi-config --device=/dev/spidev0.0 --speed=1000000
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70       Set a configuration and keep the device open:
71              $ spi-config --wait --speed=1000000 & PID=$!
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73       Close device previously open:
74              $ kill $PID
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AUTHOR

77       Written by Christophe BLAESS <https://www.blaess.fr/christophe>.
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REPORTING BUGS

80       Github home page: <https://github.com/cpb-/spi-tools.git>
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83       Copyright © 2014 Christophe Blaess.
84       Licensed under GPLv2 <http://gnu.org/licenses/gpl.html>.
85       This is free software: you are free to change and redistribute it.
86       There is NO WARRANTY, to the extent permitted by law.
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90SPI-tools                         August 2014                    SPI-CONFIG(1)
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