EMIF 5502 custom board flash boot problem

Hi
I have a custom 5502 board. I have been able to write code to it's
SDRAM and execute form there. My problems (unexpectedly) are coming
from flash.

i can access it's flash when i burn my code in it and using flashburn
i also compared the flash contents of my board versus the EVM5502
board and i found that they were the same.

My GPIOs are always(before reset adn after reset i have hardwired
them) in the following configuration
GPIO[2..0]= 011
GPIO4,6,7 are all high

So i am booting EMIF(parallel 16) from external clock and i am also
going to use serial port 2 as Mcbsp only.

The thing is even when i configure for BOOT mode from external 16 bit
parallel EMIF i don't see my code running and the DSP does not draw
any power like it does whne the same code i run in the internal memory
from CCS.

I wonder and i have no clue as to why a standalone program does not
work even when the flash i can read and write to without any errors
with flashburn.

Is there anythign special that one has to be take care of when
bringing up a board form external flash?? (I have the hold pin and teh
rdy pin pulled high)
Could the RESET for flash(that i have linked with the reste of the
DSP, so that both DSP and FLASH come out of reset at the same time) be
creating a problem does it have to be delayed or has to be faster than
the DSP reset??
Another interesting thing about this problem. Once i have burnt code
into the flash and i power cycle the board and try connecting with CCS
I CAN NO LONGER connect to it. I get a error like Error Initialization
OCS. RSET EMULATOR and all that.

This error i understand comes when the XDS cannot reset the target board.

To recover my board i have to change my jumper config
GPIO[2...0] to 000 and the only can i connect and then i have to
erase the flash and then only can i see my board doing everything else
that it can do.
Can someone suggest something? If there might be some things i must
check to make sure the things are as what XDS expects when it is
connected to a board on whcih the flash is running.....

Thanks for reading.

Rohit
Does someone has any ideas on how this problem can be solved???

Rohit Start a New Thread

Rohit-

> Another interesting thing about this problem. Once i have burnt code
> into the flash and i power cycle the board and try connecting with CCS
> I CAN NO LONGER connect to it. I get a error like Error Initialization
> OCS. RSET EMULATOR and all that.

This is strangest thing you've mentioned, so I would focus on this first. What if
you just write one word to Flash, or erase a sector, then can you cycle power and
continue to use CCS? Just go step-by-step with this one, you should be able to find
something interesting.

Also with 5502 boot Flash must be in CE1 space, did you do that? If so, what do you
have in CE0 space? When you release Reset, can you see CE1 toggling on the scope?
If so then the 5502 is trying to boot from EMIF.

-Jeff

theitabhiyanta wrote:
>
> Hi
>
> I have a custom 5502 board. I have been able to write code to it's
> SDRAM and execute form there. My problems (unexpectedly) are coming
> from flash.
>
> i can access it's flash when i burn my code in it and using flashburn
> i also compared the flash contents of my board versus the EVM5502
> board and i found that they were the same.
>
> My GPIOs are always(before reset adn after reset i have hardwired
> them) in the following configuration
> GPIO[2..0]= 011
> GPIO4,6,7 are all high
>
> So i am booting EMIF(parallel 16) from external clock and i am also
> going to use serial port 2 as Mcbsp only.
>
> The thing is even when i configure for BOOT mode from external 16 bit
> parallel EMIF i don't see my code running and the DSP does not draw
> any power like it does whne the same code i run in the internal memory
> from CCS.
>
> I wonder and i have no clue as to why a standalone program does not
> work even when the flash i can read and write to without any errors
> with flashburn.
>
> Is there anythign special that one has to be take care of when
> bringing up a board form external flash?? (I have the hold pin and teh
> rdy pin pulled high)
> Could the RESET for flash(that i have linked with the reste of the
> DSP, so that both DSP and FLASH come out of reset at the same time) be
> creating a problem does it have to be delayed or has to be faster than
> the DSP reset??
>
> Another interesting thing about this problem. Once i have burnt code
> into the flash and i power cycle the board and try connecting with CCS
> I CAN NO LONGER connect to it. I get a error like Error Initialization
> OCS. RSET EMULATOR and all that.
>
> This error i understand comes when the XDS cannot reset the target board.
>
> To recover my board i have to change my jumper config
> GPIO[2...0] to 000 and the only can i connect and then i have to
> erase the flash and then only can i see my board doing everything else
> that it can do.
>
> Can someone suggest something? If there might be some things i must
> check to make sure the things are as what XDS expects when it is
> connected to a board on whcih the flash is running.....
>
> Thanks for reading.
>
> Rohit
> Does someone has any ideas on how this problem can be solved??? Start a New Thread