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Forum: µC & Digital Electronics when code runs from SDRAM,Flash Init does not work


when code runs from SDRAM,Flash Init does not work
von Vani A. (blquest)

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Hi,



We are using AT91SAM9263 processor.We are utilizing

1. ROMBoot to copy bootstrap(Atmel supplied) into internal SRAM.

2. bootstrap code(Atmel supplied) copies the data flash contents to 
SDRAM and then executes from there.

While we are running our application in SDRAM,if we want to load a new 
application in Flash, J-Link is not able to initialize the flash to gain 
access to program the device.

Please help us by providing the reason for this behaviour as well as the 
solution if any.

your reply awaited.

Thanks

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Re: when code runs from SDRAM,Flash Init does not work
von no one (Guest)

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Maybe u disabled the JTAG in ur code?

what about the AT91SAM9 manual ... there should be some paged about the 
boot strategies.

Aren't there any pins to configure the first boot source? U could point 
at a non working source and than try to flash.

good luck

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