DO0281R00
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Filtering by frame length
Example:
You want to filter all frames that are 1012 bytes long.
Set the following filter registers:
Register
Parameter
Function
State:
x05
00 00 03 F4 Frame is 1012 bytes long (0x03F4)
x06
00 00 FF FF Mask on 2 bytes
Filter 1
x55
00 00 00 00 No negation of StateFilter
x56
80 00 00 00 Filter1 consists of state filter
Uplink
x65
00 00 00 00 Do not invert output
x66
00 00 00 01 Frame is output at the uplink port if filter 1 applies.
ConfigReg
401
xx xx xx xE Activate filter for CON A port (1110)
Configuring filters
You can set what you want to do with the result of a filter in the Registers menu
"401-410". You can show that a filter applies via the filter LEDs or the external
output.
Information and setting values can be found in the chapter called "TAP
configuration register [
44]".
To be able to use the configuration settings, they have to be saved.
Filters