User Manual

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$ sudo vim /etc/modprobe.d/raspi-blacklist.conf
Add '#' at the beginning of the line spi-bcm2708 to comment it out of the blacklist. Save the file, and reboot
the Raspberry Pi:
$ sudo reboot
After rebooting the Raspberry Pi, type in the command lsmod and you can see the spi device driver
(spi_bcm2708) is enabled.
Then, two device files, /dev/spidev0.0 and /dev/spidev0.1, will appear under the directory /dev/ in the
system:
$ ls /dev/spi*
If the two files exist under the directory, it means the SPI driver has been loaded successfully.
Step 2. Connect the circuit