Stream CRC32: Difference between revisions
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[[File:Stream_crc32_flowgraph.PNG]] | [[File:Stream_crc32_flowgraph.PNG]] | ||
The data plot after CRC32 is as follows. As seen, the packet length | The data plot after CRC32 is as follows. As seen, a CRC has been added at the end of each packet and the packet length tag has been updated from 100 bytes to 104 bytes, where the extra 4 bytes are for the CRC. | ||
[[File:Stream_crc32_output.PNG| | [[File:Stream_crc32_output.PNG|1000px]] | ||
== Source Files == | == Source Files == | ||
Latest revision as of 06:42, 27 January 2022
Byte-stream CRC block.
- Input
- stream of bytes, which form a packet. The first byte of the packet has a tag with key "length" and the value being the number of bytes in the packet.
- Output
- The same bytes as incoming, but trailing a CRC32 of the packet. The tag is re-set to the new length.
Parameters
- Mode
- Set to true if you want to check CRC, false to create CRC.
- Length tag name
- Length tag key for the tagged stream.
- Packed
- If the data is packed or unpacked bits.
Example Flowgraph
The following flowgraph adds tags to the output of the signal source. This is done because Stream CRC32 is a tagged stream block and needs a Length tag key.
The data plot after CRC32 is as follows. As seen, a CRC has been added at the end of each packet and the packet length tag has been updated from 100 bytes to 104 bytes, where the extra 4 bytes are for the CRC.
Source Files
- C++ files
- crc32_bb_impl.cc
- Header files
- crc32_bb_impl.h
- Public header files
- crc32_bb.h
- Block definition
- digital_crc32_bb.block.yml