Storing data in Flash (Program) memory

[MikeBZH]

Hello,

I need to store two tables of data (32KB each) in the program memory.
These data will be read by the program when running.

I have found the way to store the data in EEPROM but not in the program memory.

Any help greatly appreciated.

The target is a 18F2685

MikeBZH

[Darrel Taylor]

Here's one way ...

Using EXT with Labels ...
http://www.picbasic.co.uk/forum/show...php?t=3891#LAB

hth,

[MikeBZH]

Thank you Darrel for your help.
I am going to try this

Mike BZH

[Darrel Taylor]

Yikes! I just realized you wanted 64k of data.

Do you have PBP 2.50?
With PBPL the READCODE statements can work above 64k, as long as the address variable is a LONG.

PBPW, can only READCODE up to the 64k barrier.

It's also possible to access the memory above 64k without using readcode if you don't have PBP 2.50, but it's a little trickier.
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[MikeBZH]

Yes, I have PBP 2.50b.
So, it should work....

Michel

[Darrel Taylor]

Yes, I have PBP 2.50b.
So, it should work....

Yes it will. (using PBPL)

With the EXT example I pointed to earlier, all you need to change is ...

Offset    VAR  LONG

Even though Offset will never be greater than 65535, one of the parameters of the READCODE statement has to be a LONG.
Since DataTable is a constant, the Offset variable gets the duty.

I'm curious where the data is coming from.
Obviously you won't want to create 64k worth of DW statements.

Is the data in a file of some type?
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[longpole001]

Hi darrel , having a read of this thread , what is as the size limits and format requirements are for the asm file include
, I need to have about 2K of byte data for banner and font data

i have table of data , which are 240 bytes long with 64 lines per , taking up about 2k per banner

regards

Sheldon

[Darrel Taylor]

PBP3 increased the ASM block size from 4K to 64K of text.
So this thread doesn't really apply when it comes to how much code you can put in an ASM block.

The only real limitation now is how much code space is available in your chip.