I would just use Flarq if I want assurances about what I received or in the case of broadcast traffic Flamp.
Not sure I see a need but that is just my opinion. Michael N4ZNV > On Mar 18, 2014, at 2:50 PM, John Phelps <[email protected]> wrote: > > > Hi all, > > Am looking to see how much interest there is in an idea I have been coding > for Fldigi: > > Basically, I am extending the IZ8BLY (MFSK) varicode to support sending and > receiving checksum-verified data-strings by utilizing 3 currently unassigned > 12-bit IZ8BLY varicodes. > > This will add the capability for Fldigi to send/receive data-strings known & > proven to be uncorrupted using the PSKR, MFSK, THOR, & other IZ8BLY > varicode-using modems without requiring any additional or external programs. > > > Technical details: > > > - New MFSK Varicode Assignments: > <Data Start> = 111111000000 > <Data End+CRC-16 Start> = 111111100000 > <CRC-16 End> = 111111110000 > > > - Data Transmit Example: > Data strings / data blocks are written as ASCII-256 to a TX TCP port > A newline character ends each string / data block and is not considered part > of the data. > A CRC-16 checksum is computed for the string's data > > The data-string is then sent in the format below: > Notice the CRC-16 is converted to lower case letters, and has no preceding > "0x" > <Data Start>Example ASCII-256 Information<Data End+CRC-16 Start>9bc3<CRC-16 > End> > > > - When a string containing a Valid CRC-16 is received, the line is: > * Optionally: Appended to the end to a text file, and ended with a newline > * Written to an RX TCP port, and ended with a newline > * In the RX window, the valid-checksummed string is changed to a different > color > > > Comments, advise, feature-requests, & criticisms welcomed :-) > > John Phelps > KL4YFD > > _______________________________________________ > fldigi-alpha mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/fldigi-alpha
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