RE: bootloader for MCORE MMC2107

["Fritz, Wolfgang" <Wolfgang dot Fritz at datentechnik dot com>]

> -----Original Message-----
> From: Abhilash R [mailto:rabhilash@tataelxsi.co.in]
> Sent: Friday, March 08, 2002 2:29 PM
> To: crossgcc@sources.redhat.com
> Subject: bootloader for MCORE MMC2107
> 
> 
> 
>  hello,
> 
> I am trying to use the bootloader code for MMC2107 ,that i 
> got from the
> pdf  file (AN1756).
> I placed  the boot loader in the first sector of the flash and i am
> trying to execute the
> bulk_erase(33,3) function . So in this erase function i am trying to
> erase only the third sector.

I assume you are running from flash.

> 
> But in the bulk_erase(INT8U clockfreq, INT8U block) function  after
> executing
> "reg_CMFRCTL.bit.EHV = 1 ; /*set EHV*/ " this line the processor is
> hanging
> It is not at all executing the next line.
> 
> What could be the problem with this?

I dont't know the flash you are using, but many flash chips do not allow
normal read access during a program/erase. So your program crashes
because it reads nonsense from the flash. Take a look at your flash
type's data sheet.


> Looking forward to your kind help.
> 
>  regards
>  abhilash
> 
> 
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