[PATCH] workaround for mpc52xx erratum #364 (serial may not be reset in break state)

[René Bürgel]

Hi

This patch is a workaround for bug #364 found in the MPC52xx processor.
The errata document can be found under 
http://www.freescale.com/files/32bit/doc/errata/MPC5200E.pdf?fpsp=1&WT_TYPE=Errata&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation

When a device with a low baudrate is connected to the serial port, but 
the processor "listens" on a higher baudrate, it might falsely receive 
breaks from the controller. During a break, the serial controller may 
not be reset. The appended patch provides a workaround for that 
situation by lowering the baudrate without resetting the controller and 
waiting until no break is received anymore.


-- 
René Bürgel
Software Engineer
Unicontrol Systemtechnik GmbH
OT Dittersbach
Sachsenburger Weg 34
09669 Frankenberg
 
Tel.: 03 72 06/ 88 73 - 19
Fax: 03 72 06/ 88 73 - 60
E-Mail: r.buergel at unicontrol.de
Internet: www.unicontrol.de
 
Unicontrol Systemtechnik GmbH
Geschäftsführer: Dipl.-Ing. Siegfried Heinze
Sitz der Gesellschaft: Frankenberg
Registergericht: Amtsgericht Chemnitz, HRB 15 475


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