• State Not Answered
  • Locked Locked
  • Replies 4 replies
  • Subscribers 22 subscribers
  • Views 1155 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

L166 Locator

S V

Hello ALL,
I'm new in c166 programming and sorry for my questions..
I have a next question about L166 locating...
1. for ex. one defines
NDATA (04000h-07FFFh)
NDATA0 (04000h-07FFFh)
and i have for ex. global variable int a;
will be this variable cleared to zero or not and how it is defined to which class it belongs?
2.one have the next user classes..
NDATA(0xC000-0xE7FF)
SDATA (0XE000-0XE7FF, 0XF600-0XFDFF),
IDATA (0XF600-0XFDFF)
these declaration use the same memory area,
how can one use it , would you give me some simple sample code to see the difference.(when one should use sdata and how in this case this variable is declared in the code).

3.Difference between ICODE and NCODE?

4.is there some good manuals about configuration of start167.a66 and L166 Locator?


Thank you for any reply,
With best regards,
A

Parents
  • 0 in reply to S V

    1. DPP0 stands for Data Page Pointer 0 which addresses normally the first page inside a segment.
    If you read more about you will find that a segment is 64kB of memory size.
    Such a segment can be divided in pages of
    16kB each.
    For addressing such a page you can use the
    DPP's.
    Normaly the DPP0 points to the system segment 0.
    How you can calculate I described in another thread, if you are interested in.
    What the standart access size is, that depends from the memory model, so that is related to your requirement of memory.
    It is quite sure not a fine hint, but that you have to read in the documentation of
    C166.pdf.
    2. Where you make the assignments of the DPP's
    is equal, but I prefer, if I not change them inside the program to do this in Linker/Locator settings.
    3. The #pragma renameclass is very good described with example in C166.pdf.
    You can use it, if you want to move your code
    inside the memory.
    With this pragma you can generate pieces of code you can control inside/with the Linker/Locator where you want to place it.
    The alarm.c - examples is quite good.
    I played with this and than it easy to understand.
    4. Under µVision3 you can use the configuration wizard.
    Or if you are new with this stuff try
    DAvE (Infineons Code Generator) where you can produce a startup code and c-file templates in a graphical way.
    It is free of charge and you can download from Infineon WEB site.

    Hope this will help you.

    Stefan

Reply
  • 0 in reply to S V

    1. DPP0 stands for Data Page Pointer 0 which addresses normally the first page inside a segment.
    If you read more about you will find that a segment is 64kB of memory size.
    Such a segment can be divided in pages of
    16kB each.
    For addressing such a page you can use the
    DPP's.
    Normaly the DPP0 points to the system segment 0.
    How you can calculate I described in another thread, if you are interested in.
    What the standart access size is, that depends from the memory model, so that is related to your requirement of memory.
    It is quite sure not a fine hint, but that you have to read in the documentation of
    C166.pdf.
    2. Where you make the assignments of the DPP's
    is equal, but I prefer, if I not change them inside the program to do this in Linker/Locator settings.
    3. The #pragma renameclass is very good described with example in C166.pdf.
    You can use it, if you want to move your code
    inside the memory.
    With this pragma you can generate pieces of code you can control inside/with the Linker/Locator where you want to place it.
    The alarm.c - examples is quite good.
    I played with this and than it easy to understand.
    4. Under µVision3 you can use the configuration wizard.
    Or if you are new with this stuff try
    DAvE (Infineons Code Generator) where you can produce a startup code and c-file templates in a graphical way.
    It is free of charge and you can download from Infineon WEB site.

    Hope this will help you.

    Stefan

Children
No data