Re: [ECOS] Memory access in a loop

["William Martin" <will at rapidnet dot com>]

Just a quick question;  Did you intend to use

x[10]  = ...
or
x[i] =

??

-Will

----- Original Message -----
From: "peter_ku" <peter_ku@issc.com.tw>
To: "'Ecos-Discuss'" <ecos-discuss@sources.redhat.com>
Sent: Wednesday, October 09, 2002 9:57 PM
Subject: [ECOS] Memory access in a loop


> Hi,
>
> I use GCC 2.95.2 / insight5.1 , target is E7T.
>
> I want to access memory in a loop
>
> unsigned  short x[10];
> for(int i=0; i<10; i++)
> {
>   x[10] =  *(volatile unsigned short *)(addr);
> }
>
> the addr is a entry point for another memory pool, after I read it once,
the memory pointer will increase automatically.
> I found a problem.
> 1. If I didn't set any breakpoint , it will only access the memory once.
it means x[0] and x[1]........[10] are all the same value.
>     I use the Logic Analyzer to make sure.
>
> 2. If I set a breakpoint or debug step by step, it will access the memory
ten times. it is more normal.
>
> any one can help me?
> PS:  I have already turn off the optimize -O0.
>
> One more question:
> And If I read a data from address, the debug will read other 16 bytes data
automatically, can I turn off this function?
> ex:
> If I read 0x2008032, it will read 0x2008034 0x2008036, 0x2008038
.............
>
>
> Best Regards,
> Peter


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