UM0851 datasheet(122/245 Pages) STMICROELECTRONICS

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Communication device drivers

UM0851

122/245

Doc ID 16604 Rev 2

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IP over HDLC

The Linux HDLC mid-layer wraps HDLC to a network device. It is possible to implement

IP protocol over an HDLC interface. You need two boards to make an IP-based test.

Example :

On board A

# setslot hdlc0 tx 0-127

# setslot hdlc0 rx 0-127

# sethdlc hdlc0 hdlc

# ifconfig hdlc0 192.168.1.1 netmask 255.255.255.0

On board B

# setslot hdlc0 tx 0-127

# setslot hdlc0 rx 0-127

# sethdlc hdlc0 hdlc

# ifconfig hdlc0 192.168.1.2 netmask 255.255.255.0

Ping from board A

# ping 192.168.1.2

4.10.10

Configuration options

4.10.11

References

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HDLC framework in linux "drivers/net/wan" for Linux 2.6.27

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SPEAr HDLC driver "drivers/net/wan/spr_hdlc.c" and "drivers/net/wan/spr_hdlc.h".

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HDLC Framework documentation Documentation/networking/generic-hdlc.txt.

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http://www.kernel.org/pub/linux/utils/net/hdlc/

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hdlctest utility: http://www.kernel.org/pub/linux/utils/net/hdlc/hdlctest-1.0.tar.gz

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sethdlc utility: http://www.kernel.org/pub/linux/utils/net/hdlc/sethdlc-1.18.tar.gz

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setslot utility

Table 36.

Menuconfig options

Configuration option

Comment

SPEAR_HDLC

SPEAR HDLC support

SPEAR_TDM_HDLC

Enables TDM interface

SPEAR_TDM_HDLC_CHANNEL_NUM

Number of TDM sub channel

SPEAR_E1_DS21554_INIT

Enables E1 interface

SPEAR_RS485_1_HDLC

Enables RS485 1 interface

SPEAR_RS485_1_HDLC_CTS_ENABLE

Enables collision detection for RS485 1 interface

SPEAR_RS485_2_HDLC

Enables RS485 2 interface

SPEAR_RS485_2_HDLC_CTS_ENABLE

Enables collision detection for RS485 2 interface

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