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UM0851 Datasheet(PDF) 121 Page - STMicroelectronics

Part # UM0851
Description  SPEAr is a family of highly customizable ARM-based embedded
PDF  245 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0851 Datasheet(HTML) 121 Page - STMicroelectronics

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UM0851
Communication device drivers
Doc ID 16604 Rev 2
121/245
hdlc1
Link encap:UNSPEC
HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
POINTOPOINT NOARP
MTU:1500
Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:7
RX bytes:0 (0.0 B)
TX bytes:0 (0.0 B)
hdlc2
Link encap:UNSPEC
HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
POINTOPOINT NOARP
MTU:1500
Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:7
RX bytes:0 (0.0 B)
TX bytes:0 (0.0 B)
hdlc3
Link encap:UNSPEC
HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
POINTOPOINT NOARP
MTU:1500
Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:7
RX bytes:0 (0.0 B)
TX bytes:0 (0.0 B)
If you set "SPEAR TDM HDLC channel number" to 2, then the first two interfaces (hdlc0 and
hdlc1) are logical HDLC channels on TDM/E1 port. The other two interfaces (hdlc2 and
hdlc3) correspond to RS485 HDLC 1 and RS485 HDLC2. Use the correct interface name in
the following commands.
4.10.9
Raw data test
To make a raw data test, use the hdlctest tool.
●
TDM loopback test (loopback TXD and RXD)
Example :
# setslot hdlc0 tx 0-127
# setslot hdlc0 rx 0-127
# hdlctest hdlc0 1000 1024 55aa55aa
●
For E1 application, there are only 32 timeslots. And TS0 in E1 is reserved. So only use
TS1 to TS31. First remove TS0 and TS32 (TS32 must have the same assignment as
TS0 if you use TDM/E1 HDLC port as E1 application)
Example :
# setslot hdlc0 -tx 0,32
# setslot hdlc0 -rx 0,32
# setslot hdlc0 tx 1-31
# setslot hdlc0 rx 1-31
# hdlctest hdlc0 1000 1024 55aa55aa
●
TDM two port loopback test (transmit on hdlc0 and receive on hdlc1)
Example :
# setslot hdlc0 tx 0-63
# setslot hdlc0 rx 64-127
# setslot hdlc1 tx 64-127
# setslot hdlc1 rx 0-63
# hdlctest hdlc0:hdlc1 1000
●
RS485 loopback test
Example :
# hdlctest hdlc2 1000



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