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Hello friends I'm working on a SOC, which has 8051 core & a generic DSP embedded on to it. I already have application code ready with me. Now our vendor has shipped new version of SOC, which supports banking. My major problem is banking. How may i break my existing application in to diffrent banks. For this SOC common area is fixed & it is 32K. Total memory is 48K. So i'm left with 16K which i have to utilise for switching banks. My application will reside on a NAND Flash. In the old SOC i was using L51_Bank.a51.
What is variable banking? Can i use it here? I refered keil website, i didn't get any solution. Does anybody give me some suggestion? Thank you in advance.
why bank code that fit (as ALL '51 code should) within the 64k limit. That banking is possible does NOT mean that you have to use it.
Erik
Hello Eric Thanks for your reply. My whole application code is 128K. And i have only 48K to use for banking in this SOC. In that 32K is reserved for common area & 16K for switching the code between SOC & NAND Flash(My application code is in NAND Flash). So this is my issue. DO you have any solution?
Thank you
So you have A 32 K common Area and 6 16K banks for a total of 128K?
Hello Neil Kurzman Thanks for your reply. As for as i know we can not make 6 banks. We can make either 2 or 4 or 8 ..ect. So I'll have to make 8 banks, but 2 banks remain unutilized. Please give some info.
Hi, Can we refer the example provided at http://www.keil.com/support/man/docs/bl51/bl51_bk_example4.htm for this issue ?
I'd agree; tell the tools you have eight banks, and simply do not use the ones that correspond to the physical memory occupied by the common 32KB. So, assuming the common area is the first two 16KB blocks which correspond to banks 0 and 1, you'd link your code into banks 2..7, but banks 0 and 1 would never be used.
It's easy to leave banks unused in uV3. You specify the bank for entire file groups with a dropdown box. So, you simply don't choose those banks that don't exist.
More generally, you might want to use the RESERVE directive to make sure the linker does not link anything in the unused banks, as well as perhaps the upper 16KB of each bank.
Hello Drew Devis We are using uV2 (V2.37).
Using such an old version is partly your problem. Mentor E8051EW and Evatronix R8051XC are both IP cores that support code banking.
For Mentor see in the current version 8.05 of C51: C:\Keil\C51\Examples\M8051EW\APNT_171.htm