how to use sdcc in uC having more than 1K bytes of RAM.

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vikrant

Joined: 30 Jun 2006
Posts: 20

22 May 2007 6:17 how to use sdcc

hi all,

I am using Philips p89v51RD2 microcontroller and SDCC compiler.
This controller has 1K of RAM size but still sdcc compiler is giving Error due to overflow of memory size, I think sdcc still taking Maximum RAM size to 128 bytes,

Error which is given by sdcc is

Error: Couldn't get 62 bytes allocated in internal RAM for area DSEG.

tell my how i can use sdcc in order to use all 1K of the microcontroller .

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jrz126

Joined: 08 May 2007
Posts: 2

23 May 2007 13:26 how to use sdcc in uC having more than 1K bytes of RAM.

I had a similar problem when using a PIC18F4520. In my case, there was a linker file that was used to set up the ram into 5 or 6 smaller banks. By changing that file, I was able to allocate one large continuous segment.

I cant say for sure if this is your problem, since I dont have any experience with that compiler. I'd try looking around in the documents for the compiler and see if there is anything there.