String Array Max Size

[MarkW]

Hello,

Is it possible to declare a larger than 255 member size for a string? There was this
issue in V4/5 but it seems to have migrated to V6 as well....

Other compilers have no issue to dimesion a large array, only limited by ram
on the particular chip being used.

Bit disappointed

Thanx

Mark

[kersing]

Flowcode 6 uses the same C compiler previous versions used, so the limit on array/string sizes is the same.

[STibor]

Hello!

This is a big problem!

Flowcode V5
Build menu /compiler:

Code: Select all

-v -t PIC%p "%f.c" -idx 2

Linker/Assembler:

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-ld "C:\Program Files (x86)\Flowcode\v5\Tools\BoostC\lib" large\libc.pic16.lib large\rand.pic16.lib large\float.pic16.lib "%f.obj" -t PIC%p -d "%d" -p "%f" -idx2

Flowcode V6 not working.
What is the problem?

[MarkW]

Hi Ben,

Any help to declare larger string array in V6?

Thanx

Mark

[Benj]

Hello,

For Flowcode 6 you would use the following in the compiler options.

Compiler Parameters

Code: Select all

-v -t PIC$(chip:u) "$(target).c" -idx 2

Linker Parameters

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-ld "$(appdir)compilers\pic\boostc\lib" libc_$(family:/12F/16F).lib rand_$(family:/12F/16F).lib float_$(family:/12F/16F).lib "$(target).obj" -t PIC$(chip:u) -d "$(outdir:~-1)" -p "$(target)" -swcs 6 2 -idx2

This should be working but I am getting this error on my latest BoostC so maybe this now has a bug?

warning: unknown index size '2', ignored

Anyway have a go it might work for you.

Otherwise could you maybe use two string variables and switch between the two based on the index pointer or use a different device target e.g. 16-bit PIC or AVR?

[STibor]

Hello!

Added to the code and the error message.

[Benj]

Hello,

It looks like the BoostC floating point library is not compatible with the idx2 option.

You can try this instead for your linker parameters but note that any Floating point or Random functions in your program will no longer work.

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-ld "$(appdir)compilers\pic\boostc\lib" libc_$(family:/12F/16F).lib "$(target).obj" -t PIC$(chip:u) -d "$(outdir:~-1)" -p "$(target)" -swcs 6 2 -idx2

[STibor]

Hello!
Same result.
Fat32/SD Card component does not use a bigger array element 256?

[Benj]

Hello,

Fat32/SD Card component does not use a bigger array element 256?

The FAT component uses two 256 byte arrays instead of one 512 byte array to avoid this problem with 8-bit PICs.

We do something like this.

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unsigned char ReadBuffer (unsigned int idx)
{
  if (idx > 255)
  {
    return buffer2[idx - 256]
  } 
  else
  {
    return buffer1[idx]
  }
}