Raspberry Pi Os Uart; Raspberry Pi Os Ethernet Port; Alternative Set-Up - Sferalabs Iono Pi Max v2 3+ Lite User Manual

dtoverlay=sdio,bus_width=4,poll_once=off

Raspberry Pi OS UART

By default, the Linux serial console is active on the main UART (/dev/ttyAMA0). If you are
using the RS-232 or RS-485 interfaces connected to the main UART (see next chapter),
you should disable it to avoid console data being sent to the serial port.
To disable the ttyAMA0 console service, run:
$ sudo systemctl disable serial-getty@ttyAMA0.service
and edit the /boot/cmdline.txt file to delete the serial console configuration:
console=serial0,115200

Raspberry Pi OS Ethernet port

Only when using the Compute Module 4S, add the following line in the /boot/config.txt file
to enable the Ethernet port:
dtoverlay=dwc2,dr_mode=host

Alternative set-up

If you are using other Operating Systems or need not to use the provided drivers, you can
access all the functionalities of Iono Pi Max via dedicated GPIO pins, the I 2 C bus and the
SPI interface.
All the features directly controlled via GPIO, such as digital inputs and watchdog control,
can be accessed using any of the standard methods provided by the operating system or
any available library for your programming language or framework of choice.
Make sure the GPIO pins are correctly configured as inputs or outputs, depending on the
function and no pull-up/pull-down is enabled.
All features of Iono Pi Max controlled via I 2 C are accessible at the address 0x35 on bus 1
("i2c-1" - GPIO2/SDA1 and GPIO3/SCL1).
The RTC (PCF2131) is directly accessible at address 0x53 on bus 1.
The CAN controller (MCP2518FD) is connected to the SPI interface chip select 0 ("spi0.0"
- GPIO8-11) and the interrupt signal (INT) to GPIO28.
Refer to the next chapter for details about each feature.
24 Iono Pi Max User Guide