lookup table

[saschech@gmx.de]

Hello

If the pic-ram is full,is there a way in flowcode ,build a " lookup table " for text e.g. text1 = "hallo1234567"
in the flash ?

Regards Wolfgang

[Benj]

Hi Wolfgang

Yes this is possible,

You can do this via the EEPROM in the supplementary code -

#pragma DATA _EEPROM, "Example string1", "Example string2"

Or via the ROM using a C code icon

rom char *text = "Example string";

You would then need a small routine to fetch bytes and store into a Flowcode string or output directly to a LCD etc.

EEPROM - Using the EEPROM component.

ROM - Using something similar to the following where you have a loop and a count variable that is incrementing.

FCV_BYTE = text[FCV_COUNT];

[saschech@gmx.de]

Hallo Benj

I have the following problem with a little testcode:

Licensed to wolfgang sachs under Single user Full License for 1 node(s)
Limitations: PIC18 max code size:Unlimited, max RAM banks:Unlimited, Non commercial use only


text_in_flash.c
Starting preprocessor: C:\PROGRA~1\SOURCE~1\pp.exe D:\mplab_c18\project002\text_in_flash.c -i C:\PROGRA~1\SOURCE~1\include -d _PIC18F4620 -la -c2 -o D:\mplab_c18\project002\text_in_flash.pp -v -d _BOOSTC -d _PIC18 -d _CHAR_INDEX


......

D:\mplab_c18\project002\text_in_flash.c(109:13): error: unknown identifier 'text'
D:\mplab_c18\project002\text_in_flash.c(109:13): error: failed to generate expression
D:\mplab_c18\project002\text_in_flash.c(109:13): error: invalid operand 'text[FCV_COUNT]'
D:\mplab_c18\project002\text_in_flash.c(109:11): error: failed to generate expression
text_in_flash.c success

failure

Return code = 1

Please can you help?

Regards Wolfgang

[Benj]

Hi Wolfgang

Ok this is now compiling correctly. I think all I did to get it to compile was to remove the brackets from your C code icons.

[saschech@gmx.de]

Hello Benj

Many thanks, workΒ΄s great!

Regards Wolfgang

[saschech@gmx.de]

Hello Benj

To day , i want use the hi-tech compiler with "your modified code"and get the error 1:

File name: D:\mplab_c18\project001\text_in_flash.c
Generated by: Flowcode v4.2.3.58
Date: Monday, January 25, 2010 10:14:31
Licence: Professional
Registered to: WOLFGANG SACHS


http://www.matrixmultimedia.com


Launching the compiler...
C:\Program Files\HI-TECH Software\PICC-18\PRO\9.63\bin\picc18.exe --CHIP=18F4620 -N48 text_in_flash.c
text_in_flash.c: main()
583: rom char *text = "Example string";
^ (192) undefined identifier "rom"
^ (195) expression syntax
602: FCV_BYTE = text[FCV_COUNT];
^ (192) undefined identifier "text"
(981) pointer required ^
(981) pointer required ^
HI-TECH C PRO for the PIC18 MCU Family V9.63PL3
Copyright (C) 1984-2009 HI-TECH SOFTWARE
Employing 18F4620 errata work-arounds:
* Corrupted fast interrupt shadow registers
* Data in RAM location can be corrupted if async. reset occurs during write
(908) exit status = 1

Return code = 1

Flowcode konnte den C-Kode des Flussdiagramms nicht kompilieren, da folgende Fehler auftraten:


Wenn Ihr Flussdiagramm C-Kode enthält,überprüfen Sie diesen sorgfältig. Falls das Flussdiagramm keinen C-Kode enthält oder Sie sich sicher sein können, dass dieser Kode fehlerfrei ist, dann wenden Sie sich an den technischen Support.

FINISHED
Regards wolfgang

[Benj]

Hi Wolfgang

The C code I gave you was BoostC specific. If you want to do the same thing on HITECH then you will need to have a look through the manual to find the relevant commands. Let me know if you get stuck and Ill have a look for you.