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* doc/avrdude.texi: new appendix "Troubleshooting" 

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@400 81a1dc3b-b13d-400b-aceb-764788c761c2
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Jan-Hinnerk Reichert 2004-01-17 14:36:47 +00:00
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avrdude/ChangeLog
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@ -1,3 +1,7 @@
2004-01-17 Jan-Hinnerk Reichert <hinni@despammed.com>
* doc/avrdude.texi: new appendix "Troubleshooting"
2004-01-12 Jan-Hinnerk Reichert <hinni@despammed.com>
* avr910.c, avrpart.c, avrpart.h, doc/TODO:

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avrdude/doc/avrdude.texi
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@ -101,6 +101,7 @@ For avrdude version @value{VERSION}, @value{UPDATED}.
* Terminal Mode Operation::
* Configuration File::
* Platform Dependent Information::
* Troubleshooting::
@end menu
@c
@ -1101,7 +1102,7 @@ problem with the at90s4433/2333's; see the at90s4433 errata at:
@c
@c Node
@c
@node Platform Dependent Information, , Configuration File, Top
@node Platform Dependent Information, Troubleshooting, Configuration File, Top
@appendix Platform Dependent Information
@menu
@ -1542,4 +1543,55 @@ line driven and for writing the batch files.
@end itemize
@c
@c Node
@c
@node Troubleshooting, ,Platform Dependent Information ,Top
@appendix Troubleshooting
@itemize @bullet
@item
Problem: I'm using a serial programmer under Windows and get the following
error:
@code{avrdude: serial_open(): can't set attributes for device "com1"},
Solution: This problem seems to appear with certain versions of Cygwin. Specifying
@code{"/dev/com1"} instead of @code{"com1"} should help.
@item
Problem: I'm using linux and my AVR910 programmer is really slow.
Solution (short): @code{setserial @var{port} low_latency}
Solution (long):
There are two problems here. First, the system may wait some time before it
passes data from the serial port to the program. Under Linux the following
command works around this (you may need root privileges for this).
@code{setserial @var{port} low_latency}
Secondly, the serial interface chip may delay the interrupt for some time.
This behaviour can be changed by setting the FIFO-threshold to one. Under Linux this
can only be done by changing the kernel source in @code{drivers/char/serial.c}.
Search the file for @code{UART_FCR_TRIGGER_8} and replace it with @code{UART_FCR_TRIGGER_1}. Note that overall performance might suffer if there
is high throughput on serial lines. Also note that you are modifying the kernel at
your own risk.
@item
Problem: I'm not using linux and my AVR910 programmer is really slow.
Solutions: The reasons for this are the same as above.
If you know how to work around this on your OS, please let us know.
@end itemize
@bye