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Problem using #rom with EEprom data

 
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unitrant



Joined: 18 Jul 2005
Posts: 9
Location: Hertfordshire. UK

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Problem using #rom with EEprom data
PostPosted: Tue Sep 12, 2006 4:56 am     Reply with quote
I have converted 16F877 code to 18F452 code but I am finding the section to initialise data for the internal EEprom is going awry.

The code below generates 8bit numbers for the EEprom when 16F877 is defined but generates 16bit numbers when 18F452 is defined.

Code:
#ifdef proc_18F452
   #rom   0xF00000 =
#else
   #rom    0x2100 =
#endif
{
   #if ICE2000==1
      1, 0, 10, 10,
      21,
   #else
      0x7F, 0x00, 0x10, 0x10,
      0x93,
   #endif
}


Do I need to add/change something or is there a bug in #rom when used in this way, please?
Ttelmah
Guest
PostPosted: Tue Sep 12, 2006 6:49 am     Reply with quote
#rom int8 .....

The default data size for the 18 chips, is 16bits, while for the older chip it is 8bits. You can force the latter chips to use 8bit size for this operation as shown.

Best Wishes
unitrant



Joined: 18 Jul 2005
Posts: 9
Location: Hertfordshire. UK

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PostPosted: Tue Sep 12, 2006 7:06 am     Reply with quote
Brilliant!
Many thanks.
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