Preprocessing error

[Dave S]

Hi all,

I have just transferred a working program from a PIC16F886 to a PIC16F1827.

I now get these errors:

"EEPROM Error MX_EEADR not set"
"EEPROM Error MX_EEDATA not set"

Any ideas please?

Dave.

[Benj]

Hello Dave,

Please bear with me and I will see if I can fix this for you tomorrow.

[Dave S]

Ok, thanks Benj.

[Benj]

Hello Dave,

I've just had a go at compiling the EEPROM for the 16F1827 device and it is working fine here. What version of v4 are you using?

[Dave S]

v4.3.7.63

[medelec35]

Ben,
I have tested for this issue.
My findings are, if you just create a new flowchart using 16F1827 issue is not there.
If you create a Flowchart using EEPROM for 16F88 target for example, then compile to check all is ok.
If you then change target to 16F1827, then recompile, you get errors Dave has
Stated.


Martin

[Dave S]

That's it exactly Martin. I want to just use a different Pic. Hopefully I don't need to start a new project with the 16F1827 and rewrite all of the code again.

Dave.

[medelec35]

Hi Dave/Ben

This time I created a new Flowchart by selecting 16F1827, and error is there from the start. Not sure why error was not there when tried from the first time, so changing from one target device to 16F1827 could have been a red herring?

The good news is I managed to successfully compile since is same issue as:
http://www.matrixmultimedia.com/mmforum ... 11&p=21395
After editing code as suggested.

Martin

[medelec35]

If you get stuck, this is how to do suggested fix that Ben posted for a different target device.

1)Highlight and Copy the following code:

Code: Select all

      char data = 0;

      #ifdef _BOOSTC
         #ifdef MX_EE
            #ifndef MX_EEADR
               #ifdef EEADR
                  #define MX_EEADR eeadr
               #endif
            #endif
            #ifndef MX_EEDATA
               #ifdef EEDATA
                  #define MX_EEDATA eedata
               #endif
               #ifdef EEDATAL
                  #define MX_EEDATA eedatal
               #endif
            #endif

2) Make sure panel properties is selected in the View menu.

3) On panel properties select EEPROM(0) then click on dots next to custom code.

4) Select EEPROMRead, then Click Edit code

5) Highlight lines 1 to 24 then just use paste to over-right original code with copied code above.
Clock OK then Close. Now recompile.

Hope that helps.
Unless a permanent fix is found today of course.

What has got me puzzled is how comes Ben's Flowchart has not got same error as us?
Maybe there is an update we missed out on?

Ben, as a test I created a flowchart with just a write to eeprom component.

Martin

[Steve]

Ben,
I have tested for this issue.
My findings are, if you just create a new flowchart using 16F1827 issue is not there.
If you create a Flowchart using EEPROM for 16F88 target for example, then compile to check all is ok.
If you then change target to 16F1827, then recompile, you get errors Dave has
Stated.


Martin

I saw this yesterday and I thought it seems strange. Flowcode should reload the component C code that is appropriate for the chip whenever the target chip changes. Clearly this is not happening due to your description above.

There is one exception where the component C code is not replaced and that is when the flowchart uses the "customize C code" feature of the component. In this case, the customizations in the C code are retained between chip changes. And if these customizations are specific to a particular chip, then it may not work on another chip.

Perhaps this is what is happening?

[Dave S]

Hi Steve, Martin, Ben,

I have repeated Martins experiment. Opened a new project with just write Eeprom macro. Write to address 0, 0x55.

Test.fcf

(4 KiB) Downloaded 310 times

Compiler gives errors as in OP.
Changing Pic was probably irellevant. I have not touched the "customise C code".

I noticed that the error message is different in this case to the one in the suggested fix. I get:

"EEPROM Error MX_EEADR not set"
"EEPROM Error MX_EEDATA not set"

The suggested fix was for:

Illegal redefinition of symbol: MX_EEADR
Illegal redefinition of symbol: MX_EEDATA

Does this make a difference?

[medelec35]

Hi, Dave,
I tried your code and got
Test.c(98): Illegal redefinition of symbol: MX_EEADR
Test.c(109): Illegal redefinition of symbol: MX_EEDATA

2 errors detected
Error: preprocessing error

failure

Return code = 1

Edited custom code the way I described and compiled OK with no errors.
I have attached modified flowchart for you to try

Martin

[Benj]

Hi Dave,

If you have not already done so then I would advise you update to v4.5 of Flowcode as this should then allow you to compile correctly or at least get the same error as Martin is reporting.

[Dave S]

Success!

I upgraded to v4.5 and got the same error messages as Martin.

Martin's Test_Mod code compiles fine.

Modified my Test code as per Martin's instructions, compiles ok.

Modified my work in progress file the same, compiles ok.

I guess this mod will be added on the next upgrade?

Thanks very much for all of your help, much appreciated.

Dave

[medelec35]

Your welcome Dave.
But to be honest, it’s all down to Ben’s solution.
If he did not post solution, I would have not been able to help.
Thanks Ben.

Martin

[Dave S]

Your welcome Dave.
But to be honest, it’s all down to Ben’s solution.
If he did not post solution, I would have not been able to help.
Thanks Ben.

Martin

Ah, but you found it for be in amongst the hundreds of pages............

Thanks to Ben as well.

[Benj]

Hello,

Cheers for your support guys just doing my job

Yes this will be fixed in the next update.