MEN G25A, Руководство пользователя

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Getting Started
20G025A00 E3

2017-04-20 Page 30
2.7.3 Configuring the UART Interfaces
MEN provides a Linux driver that allows to configure the interface mode and baud rate.It
is included in the 13MD05-90 MDIS5 system package for Linux.
The baud_base parameter must be set to 1843200. Use the following command:
MEN’s Linux driver supports the following values for the mode parameter:
Note: You can check using dmesg whether all /dev/ttySx interfaces are present.
2.7.4 Controlling SATA SGPIO Functions
There are two ways to access SGPIO functions under Linux:

Using the MEN software tool included in the MDIS5 System Package for Linux,
13MD05-90.

Using standard Linux I2C tools.
See the MEN website for the MDIS system package:
www.men.de/software/13md05-90/
# modprobe men_lx_z25 baud_base=1843200
se single ended (RS232)
df_fdx differential, full duplex (RS422)
df_hdxe differential, half duplex, with echo (RS485)
df_hdx differential, half duplex, no echo (RS485)
Most Linux kernels only support 4 UARTs by default. If you need more
than 4 UARTs, add parameter 8250.nr_uarts=16 to your kernel boot line in
the bootloader or adjust kernel parameter CONFIG_NR_8250_UARTS and
recompile the kernel.
See the block diagram and the front panel drawing in Chapter 1 Product Overview to
find out the interface names and numbers.
The G25A implementation does not support the standard Linux tools
sgpio and ledmon .
More information on supported functions and hardware implementation

See Chapter 5.3 SATA SGPIO FPGA on page 60 for a register description.

See Chapter 2.7.1.2 Standard Linux I2C Tools on page 28 for a more detailed
description of how to access SMBus devices using standard Linux tools.