Advertisement
For usage examples, see the https://python-periphery.readthedocs.io/en/latest/pwm.html.
I2C
The following code shows how to instantiate each of the I2C ports with Periphery:
i2c2 = I2C("/dev/i2c-1")
i2c3 = I2C("/dev/i2c-2")
For usage examples, see the https://python-periphery.readthedocs.io/en/latest/i2c.html.
SPI
The following code shows how to instantiate each of the SPI ports with Periphery:
# SPI1, SS0, Mode 0, 10MHz
spi1_0 = SPI("/dev/spidev32766.0", 0, 10000000)
# SPI1, SS1, Mode 0, 10MHz
spi1_1 = SPI("/dev/spidev32766.1", 0, 10000000)
For usage examples, see the https://python-periphery.readthedocs.io/en/latest/spi.html.
UART
The following code shows how to instantiate each of the UART ports with Periphery:
# UART1, 115200 baud
uart1 = Serial("/dev/ttymxc0", 115200)
# UART3, 9600 baud
uart3 = Serial("/dev/ttymxc2", 9600)
Caution:
UART1 is shared with the Linux serial console. To use the UART1 port in your application, you
must disable the serial console with the following command:
systemctl stop serial-getty@ttymxc0.service
Note: UART3 is not enabled by default in Mendel 3.0 (Chef), but we've released a package update to
enable it. First check to see if it's available on your board:
ls
/dev |
grep
ttymxc
If you see ttymxc2 listed, then you're all good. If not, then you need to update as follows:
sudo apt-get
update
sudo apt-get
dist-upgrade
sudo reboot
now
For usage examples, see the https://python-periphery.readthedocs.io/en/latest/serial.html.
Advertisement
