Lpc2000

Hi all, 
        I am newbie to this field.I am using LPC 2106 for my application.

I write the code to test the unused ROM data.My program size is 500 
bytes.After 500 bytes, remaining bytes are unused ROM space only

May be the  unused ROM data  will be either 0x00 or 0xFF ?

My code :

void main (void)
{
        unsigned int Output=0,Pass=0;
        Output=ROM_Check(0x00000800,10);
        if(Output == 0)
                Pass=0;
        else
                Pass=1;
}
unsigned int ROM_Check(unsigned int *Start_address,unsigned int ROM_Size)
{
        unsigned int c;
        for (c = 0; 0 < ROM_Size; ROM_Size- -)
        {
                c += *Start_address;
                Start_address++;
        }
        return (c);
}

But, when I check the ROM data, I am getting different kind of data like 
this  EF   D5   EA  E4   EE   D0   F6   D0   E3   FA

I want to know whether it is correct or not ?
What will be the unused ROM data?
For Each cycle of operation,I want to check the unused ROM space,to ensure 
the Microcontroller status.How can I achieve this one.

Please tell me Where I done a wrong thing?

Regards
S.Kumar




[Non-text portions of this message have been removed]

Saravanakumar S wrote:

>Hi all, 
>        I am newbie to this field.I am using LPC 2106 for my application.
>
>I write the code to test the unused ROM data.My program size is 500 
>bytes.After 500 bytes, remaining bytes are unused ROM space only
>
>May be the  unused ROM data  will be either 0x00 or 0xFF ?
>
>My code :
>
>void main (void)
>{
>        unsigned int Output=0,Pass=0;
>        Output=ROM_Check(0x00000800,10);
>        if(Output == 0)
>                Pass=0;
>        else
>                Pass=1;
>}
>unsigned int ROM_Check(unsigned int *Start_address,unsigned int ROM_Size)
>{
>        unsigned int c;
>        for (c = 0; 0 < ROM_Size; ROM_Size- -)
>        {
>                c += *Start_address;
>                Start_address++;
>        }
>        return (c);
>}
>
>But, when I check the ROM data, I am getting different kind of data like 
>this  EF   D5   EA  E4   EE   D0   F6   D0   E3   FA
>
>I want to know whether it is correct or not ?
>What will be the unused ROM data?
>  
>
Unprogragmmed Flash memory is $ff, same as "normal" flash.

TomW

-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------

The IAP interface supports programming of blocks that are 512, 1024, 
2048, 4096, 8192 bytes.
Since the IAP routines are used by most programmers this means that your 
application is padded with zeros, 0xFF or junk depending on the 
implementation of the programmer. The size of the padding depends on the 
block size used by the programmer.

Regards,
Richard.



Tom Walsh wrote:

> Saravanakumar S wrote:
>
> >Hi all,
> >        I am newbie to this field.I am using LPC 2106 for my application.
> >
> >I write the code to test the unused ROM data.My program size is 500
> >bytes.After 500 bytes, remaining bytes are unused ROM space only
> >
> >May be the  unused ROM data  will be either 0x00 or 0xFF ?
> >
> >My code :
> >
> >void main (void)
> >{
> >        unsigned int Output=0,Pass=0;
> >        Output=ROM_Check(0x00000800,10);
> >        if(Output == 0)
> >                Pass=0;
> >        else
> >                Pass=1;
> >}
> >unsigned int ROM_Check(unsigned int *Start_address,unsigned int ROM_Size)
> >{
> >        unsigned int c;
> >        for (c = 0; 0 < ROM_Size; ROM_Size- -)
> >        {
> >                c += *Start_address;
> >                Start_address++;
> >        }
> >        return (c);
> >}
> >
> >But, when I check the ROM data, I am getting different kind of data like
> >this  EF   D5   EA  E4   EE   D0   F6   D0   E3   FA
> >
> >I want to know whether it is correct or not ?
> >What will be the unused ROM data?
> > 
> >
> Unprogragmmed Flash memory is $ff, same as "normal" flash.
>
> TomW
>
> -- 
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------------------------------------------
>
>
>