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RedBoot on V850 problem
- From: <savin at torina dot fe dot uni-lj dot si>
- To: <ecos-discuss at sources dot redhat dot com>
- Date: Sun, 3 Feb 2002 19:03:28 +0100 (CET)
- Subject: RedBoot on V850 problem
I have adopted the eCos CEB port to work with
NEC StartWARE-V850/SA1 (20MHz) board. GDB stub is
in flash and downloading / debugging works fine.
Now I'am trying to get RedBoot running...
I download it with gdb and then use minicom, I can
see the prompt and type in commands. The problem
arises when downloading a program - if I just
type the command 'load -m xm' and watch it gives
me the 'C' char every 10-15 seconds (isn't this to slow?).
Then I implemented the HAL_DELAY_US function using the
code from hal/common/current/src/hal_if.c and adding the
interval timer initialization.
But downloading with RedBoot still doesn't work
(the 'C' char is still coming out every 10-15 seconds).
Is there another reason for RedBoot to behave this way?
NOTE: there seems to be a problem with the current implementation
of delay_us in hal/common/current/src/hal_if.c -
if we have a long delay (usecs=250000) and the
CYGNUM_KERNEL_COUNTERS_RTC_PERIOD is a big number (in
my case it is 50000), then the following line gives us
an integer overflow (usecs and usec_ticks being of type cyg_int32)
usec_ticks = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;