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#define

 
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CAP1108
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#define
PostPosted: Thu Jun 18, 2009 10:49 am     Reply with quote

Hi Guys

I am using #if defined TypeA or #if defined TypeB throughout my code depending on which of two product types will be connected.
Code:

#if defined(__TYPE_A__)
///code here
#endif
   
#if defined(__TYPE_B__) 
///code here
#endif

This works very well but requires setting TYPE_A or TYPB_B when compiling. I am now looking to be able to switch the type via an rs232 command and wanted to know if I can re-define the system to say type_B from within the code.

Is it possible to just run the command
Code:
#define     __STYPE_B__


Thanks

Chris.......
PCM programmer



Joined: 06 Sep 2003
Posts: 21602

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PostPosted: Thu Jun 18, 2009 11:48 am     Reply with quote

The #if statements work at compile-time.

Apparently you want something that works at run-time. One method
would be have an eeprom address set to a certain value. Then you
could read the eeprom address at start-up, and load it into a RAM
variable. Then test that RAM variable at suitable points in your program
with if() statements to control program flow.
CAP1108
Guest







Will give this a go
PostPosted: Fri Jun 19, 2009 2:05 am     Reply with quote

Thanks for the advice.

Will give this a go

Chris ..........
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