Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
problem interfacing scv64 with mc68332
4 views
Skip to first unread message
bca
Jan 30, 2008, 7:29:50 AM1/30/08
to
Hi,
We have designed a board with MC68332 16 bit micro controller
interfacing with scv64.Since scv 64 is 32 bit register access, higher
data lines of it are interfaced with latch implementation,writing the
registers by one extra 16 bit write cycle with this
configuration .Using BDM(debugging tool) ,application is dumped into
flash and running from flash VME accessing is fine,but when we are
not using the tool and boot from flash then VME accessing is giving
problem.In this condition what we observed is VME mode register and
some other registers are getting corrupted.
(Power on reset sp705 output is connected to micro controller reset
and scv64 power on reset. scv 64 external reset is pulled up with 10 k
resistor.)
We have designed a board with MC68332 16 bit micro controller
interfacing with scv64.Since scv 64 is 32 bit register access, higher
data lines of it are interfaced with latch implementation,writing the
registers by one extra 16 bit write cycle with this
configuration .Using BDM(debugging tool) ,application is dumped into
flash and running from flash VME accessing is fine,but when we are
not using the tool and boot from flash then VME accessing is giving
problem.In this condition what we observed is VME mode register and
some other registers are getting corrupted.
(Power on reset sp705 output is connected to micro controller reset
and scv64 power on reset. scv 64 external reset is pulled up with 10 k
resistor.)
we are stuck up at this condition.
please some one provide us with solution or any kind of help is
appreciated .
pl. can reply to bchandraaditya @gmail.com also.
Scott Newell
Feb 2, 2008, 2:27:41 PM2/2/08
to
Does your BDM tool do any CPU register configuration,
such as the chip selects and wait states? If so, you may not
have everything configured in your flash resident program.
--
newell N5TNL
bca
Feb 4, 2008, 1:20:19 AM2/4/08
to
yes we are using bd32 tool and it can do these opertions we are
loading a ini file with all scv64 register intialisations and using
this tool wen we boot its fine but removing this tool its not booting
from flash.does using bd32 effect the hardware so that output occurs
and wen removing it shud we change some hardware. pl. tell me the
diffrence.
loading a ini file with all scv64 register intialisations and using
this tool wen we boot its fine but removing this tool its not booting
from flash.does using bd32 effect the hardware so that output occurs
and wen removing it shud we change some hardware. pl. tell me the
diffrence.
Scott Newell
Feb 4, 2008, 8:22:54 PM2/4/08
to
Configure the scv64 from code, instead of from the bd32 .ini file.
0 new messages