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 are stuck up at this condition.
please some one provide us with solution or any kind of help is
appreciated .
mc68332 interfacing with scv64
Started by ●January 30, 2008
Reply by ●January 30, 20082008-01-30
Hi:
One thing that I always want to look at when using a debugger is
what memory configuration and/or initialization files are being
downloaded to the MCU. These could explain why your application is
working with the debugger and not working during stand-alone execution.
These files could be writing parameters to the MCU that you are not
doing in your code. The files should be text so you should be able to
see what is being initialized different from your code. Let us know if
this does not help. Also, what debug tool are you using?
Regards,
John Honnold
Freescale Semiconductor
Technical Information Center
MCU 16/32 Bit Applications Engineer
----------------------
This email has been classified:
( ) Freescale General Business
( ) Freescale Confidential Proprietary
( ) Freescale Internal Use Only
(x) Public
________________________________
From: 6... [mailto:6...] On Behalf
Of chandaraaditya
Sent: Wednesday, January 30, 2008 5:23 AM
To: 6...
Subject: [68HC12] mc68332 interfacing with scv64
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 are stuck up at this condition.
please some one provide us with solution or any kind of help is
appreciated .
One thing that I always want to look at when using a debugger is
what memory configuration and/or initialization files are being
downloaded to the MCU. These could explain why your application is
working with the debugger and not working during stand-alone execution.
These files could be writing parameters to the MCU that you are not
doing in your code. The files should be text so you should be able to
see what is being initialized different from your code. Let us know if
this does not help. Also, what debug tool are you using?
Regards,
John Honnold
Freescale Semiconductor
Technical Information Center
MCU 16/32 Bit Applications Engineer
----------------------
This email has been classified:
( ) Freescale General Business
( ) Freescale Confidential Proprietary
( ) Freescale Internal Use Only
(x) Public
________________________________
From: 6... [mailto:6...] On Behalf
Of chandaraaditya
Sent: Wednesday, January 30, 2008 5:23 AM
To: 6...
Subject: [68HC12] mc68332 interfacing with scv64
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 are stuck up at this condition.
please some one provide us with solution or any kind of help is
appreciated .
Reply by ●January 30, 20082008-01-30
Check the watchdog timer settings. In the debugger, the watchdog is
typically disabled.
Check for ground problems. The BDM module will provide a ground.
Take a look at the reset pin on the processor with an oscilloscope.
If the processor is not booting properly, reset will get asserted
every 256 cycles. I cannot remember, but a 10K pullup may be to weak.
I seem to remember using a 820R. (Reset is also controlled by the BDM
when it is connected)
For a better response, you may want to post your message to the 68300
group at 6...
Andrei
>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 are stuck up at this condition.
>please some one provide us with solution or any kind of help is
>appreciated .
>
>
typically disabled.
Check for ground problems. The BDM module will provide a ground.
Take a look at the reset pin on the processor with an oscilloscope.
If the processor is not booting properly, reset will get asserted
every 256 cycles. I cannot remember, but a 10K pullup may be to weak.
I seem to remember using a 820R. (Reset is also controlled by the BDM
when it is connected)
For a better response, you may want to post your message to the 68300
group at 6...
Andrei
>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 are stuck up at this condition.
>please some one provide us with solution or any kind of help is
>appreciated .
>
>
Reply by ●February 2, 20082008-02-02
Designed when, last century? What did you do cut the 68332 in half to
get a 16 bit mcu? (it's still active, but it came out in 95).
--- In 6..., "chandaraaditya"
wrote:
>
> 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 are stuck up at this condition.
> please some one provide us with solution or any kind of help is
> appreciated .
>
get a 16 bit mcu? (it's still active, but it came out in 95).
--- In 6..., "chandaraaditya"
wrote:
>
> 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 are stuck up at this condition.
> please some one provide us with solution or any kind of help is
> appreciated .
>
Reply by ●February 4, 20082008-02-04
yes we used designed it earlier but now again we are working on that we
are using bd32 tool and booting is happening properly but removing it
we are not able to boot i want to kno wat will be the effect of using
bd32 tool on mc68332 so that i can find the diffrence when using bd32
and boot from flash and without it.
are using bd32 tool and booting is happening properly but removing it
we are not able to boot i want to kno wat will be the effect of using
bd32 tool on mc68332 so that i can find the diffrence when using bd32
and boot from flash and without it.
