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Altera_Forum
Honored Contributor
Honored ContributorBug in serial port com
When transferring (using Hyperterminal) 2 identical characters, the second character may get its MSB flipped. For example, sending "FF" may be received as "0x46 0xC6". Has anybody seen this and kn...
Altera_ForumHonored Contributor
Honored ContributorIt might be that you baud rate is slightly out, and that the wrong bit gets sampled - in theory this should generate a receive framing error, but those aren't always reported to apps.
The byte will be sent LSB first, so you should be able to work out what is being mis-sampled. Remember the async byte pattern is 10 bits long (a zero before the byte and a one after it).
