[Simulavr-devel] [patch #4148] stop bit reception in HWUart

[Artur Abels]

URL:
  <http://savannah.nongnu.org/patch/?func=detailitem&item_id=4148>

                 Summary: stop bit reception in HWUart
                 Project: Simulavr: an AVR simulator
            Submitted by: artur_abels
            Submitted on: Thu 07/07/2005 at 07:23
                Category: bug fix
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open

    _______________________________________________________

Details:

HWUart when receiving stop bit waited 15 samples for it, so stop bit had a
pretty good chance to end by the time HWUart checked for it. Then HWUart
waited for HIGH and after that next LOW bit was assumed to be startbit So when
sending many bytes one right after another, then it received wrong  way. This
bug did not cause any trouble until transmission speed was within the limit,
where stop bit was long anough (after stop bit a least for 1 bit time the
sender was inactive, that caused HIGH state on the line as it was a long
stopbit).





    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Thu 07/07/2005 at 07:23  Name: 2stopbit.patch  Size: 1.74KB   By:
artur_abels

<http://savannah.nongnu.org/patch/download.php?item_id=4148&item_file_id=4797>

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/patch/?func=detailitem&item_id=4148>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.nongnu.org/