How to let "sfr P0= 0x80;" command line pass compi

[norman_tan]

Hi All,
I am integrating an old 51 project into my current CCS project, during compiling I have met many many Errors. and CCS support have given me much help. I am very thankful to them. they are great!
and at the same time, It will be better if I can get help or advices from you too, thus it will reduce the burden for CCS support . I am sorry there are too many Errors here.

How to let command line "sfr P0= 0x80;" in file "REG52.h" pass compiling and at the same save the original function?

Thanks a lot!

Norman

[Ttelmah]

REG52.h was a register file for the old 80C51/2 processor.
Nothing to do with the PIC.

Now the obvious way is to simply use a #DEFINE and #IF statement/test.

First thing you need to work out is what the equivalent register is for the PIC involved. The P0 register on the 8051, is probably going to be closest to PortA on the PIC, but since it is a different chip this is really going to depend on the board hardware.

Then you would use something like:

[temtronic]

Having 'been there, done that' it may be easier to actually abandon the 'integration' method and just code 100% in CCS C. As Mr. T points out ports and pins are not the same (obviously) so a LOT of time will be used trying to 'convert' or 'integrate' 8051 code into PIC code.
In my case (20+ years ago...sigh), I made a chart of 8051 ports/pin vs PIC ports/pins, stuck it on the PC case and coded one 8051 program function at a time into CCS C.Had a dummy main() that called each function. Compiling would show any errrors (well typing, syntax, etc.), I'd correct/compile and move onto the next one. This technique took about a week and in the end the CCS C program did work.
In doing it this way you migrate from 8051 'design' philosophy into the PIC way of doing things.

[norman_tan]

Dear Ttelmah and Temtronic,

Both your said are good ideas, Thanks a lot!

In this OLD C31 project (I want to integrate it into my current CCS project), the Profibus chip (Siemens chip DPC31) includes two cores, one is ASIC and the other is C31. And its firmware package is edited based on the inner C31, so it calls C31 function easily. But now I want to use its ASIC function only. I hope DPC31 can call its inner C31 function itself, I think so, but I am not sure of it. So I am asking Siemens for this question too.

If it can be removed, it will be better.

Thanks.

[norman_tan]

Hi all,

Siemens answered as below:
when you use an external processor all codes of the C31 can be removed.

That is cooool.

Thanks!

Norman

[temtronic]

hmm
have you a copy of this ?
dpc31_hardware_description_v21.pdf
looks like THE datasheet for the device.

Jay

[norman_tan]

Dear temtronic,

I have a copy of "dpc31_hardware_description_v25.pdf".

but I do not know how to attach it here

How about telling me your email address?

Norman