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  • Auto baud detection

    Hi I have just started to experiment with the micro-VGA and it seams that the autobaud detection (U) does not work because I get framing error report from the UART in my cpu. The baudrate I use is 115.2 kBits/s, 1 stop bit, no parity and 8 bit characters.

    How many times do I have to send "U"?

    Best regards
    Lars - SM7LQV

  • #2


    Depending on the time it takes your host to boot, a pullup resistor may be required on the uVGA module's Rx line. This will prevent the module from seeing state changes on a floating host Tx pin as a start bit and locking on as an AutoBaud request. Please see page 45 of the uVGA-PICASO-MD1 User Manual for details.

    Good luck and happy experimenting,

    Steve
    Any technology, sufficiently developed, is indistinguishable from magic. A.C. Clark(RIP)

    NEW! Lower prices on all 4D Systems products for 2009 and continuing into 2010!
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    • #3


      Thank you Steve,

      You solved my problem but I connected the reset-pin to a port on my cpu and reset the uVGA after I init the serilaport. And then start the auto baud sequence. It works fine an my framebuffer driver for Linux is up and running.

      /Lars
      Lars - SM7LQV

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