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Altera_Forum's avatar
Altera_Forum
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16 years ago

baud rate recognizer

hi guys , i need to build a baud rate recognizer as part of a serial communication reciver. the baud rate recognizer , recives 31h as the first signal and based on it, recognizes the rate. ( 24...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

If you only need to support a relatively small number of baud rates, you could synthesize several UARTs in parallel, one for each baud rate. Then, you just wait for one of the UARTs to correctly receive the 31h.

A more traditional approach would be to measure the time between transitions when receiving the 31h. For example, you could measure the time of the start bit. From this, you can calculate the baud rate.