This program allows full-duplex communications, sending data from its standard input to the SPI slave, and displaying on its standard output the data received from the SPI port.
- -d, --device=DEVICE
use the given Linux spidev character device.
- -s, --speed=<int>
set the target SPI speed for transfer.
- -b, --blocksize=<int>
set the block size (in bytes) for transfer.
- -n, --number=<int>
set the number of blocks to transmit (-1 for continuous transfert).
- -h, --help
display the help screen and exit.
- -v, --version
display the version number and exit.
- Get help:
$ spi-pipe -h
- Send and receive at the same time
$ command-1 | spi-pipe --device=/dev/spidev0.0 | command-2
Note that command-1, command-2 and spi-pipe run simultaneously in three different processes.
- Send data to the SPI link
$ command-1 | spi-pipe --device=/dev/spidev0.0
- Receive data from the SPI link
$ spi-pipe --device=/dev/spidev0.0 < /dev/zero | command-2
You can also use command-2 < /dev/spidev0.0 but with spi-pipe you can control what is sent to the device (always `0` here).
- Read 40 blocks of 4 bytes from the SPI link
$ spi-pipe --device=/dev/spidev0.0 -b 4 -n 40 < /dev/zero | command-2
Written by Christophe BLAESS <https://www.blaess.fr/christophe>.
Github home page: <https://github.com/cpb-/spi-tools.git>
Copyright © 2014 Christophe Blaess.
Licensed under GPLv2 <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.