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KnowMore
Joined: 05 Jul 2010
Posts: 9
Location: Vietnam
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| How to define data-table on on-chip EEPROM |
 Posted: Fri Jul 16, 2010 2:55 am |
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I want to define data-table on on-chip EEPROM, and this information will stay in hex file (so it's easy to program chip, and fix it if required).
Does anyone know how can I do?
Thank you!
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Ttelmah
Joined: 11 Mar 2010
Posts: 19552
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| Posted: Fri Jul 16, 2010 5:05 am |
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#ROM
You need the 'programming' address of the EEPROM (varies with different chip families 0x2100 on the older PIC16 chips, 0xF00000 on the PIC18, etc. - look at the programming data sheet for this), then:
(on a PIC16)
#ROM 0x2100 = {1,2,3,4,5,6,7,8}
Will put 1 to 8, in the first 8 bytes of the EEPROM.
Best Wishes |
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KnowMore
Joined: 05 Jul 2010
Posts: 9
Location: Vietnam
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| Posted: Fri Jul 16, 2010 10:24 am |
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| Ttelmah wrote: | #ROM
You need the 'programming' address of the EEPROM (varies with different chip families 0x2100 on the older PIC16 chips, 0xF00000 on the PIC18, etc. - look at the programming data sheet for this), then:
(on a PIC16)
#ROM 0x2100 = {1,2,3,4,5,6,7,8}
Will put 1 to 8, in the first 8 bytes of the EEPROM.
Best Wishes |
Thank you very much! I can do now.
It's seem hard to find EEPROM address from device datasheet, programming specification  . I looked for these address at Winpic800 software  , and found 0x2100 for PIC12 and 16, 0x780000 for PIC18, 0x7FFC00 for dsPIC30.
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KnowMore
Joined: 05 Jul 2010
Posts: 9
Location: Vietnam
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| Posted: Fri Jul 16, 2010 10:54 pm |
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I've found that the best way to have EEPROM address of any chip is look in Device Table Editor of our IDE, in tab MCU Parts, middle table, Memory part.
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MikeP
Joined: 07 Sep 2003
Posts: 49
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| Posted: Sat Jul 17, 2010 2:15 am |
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| Code: |
#ROM getenv( "EEPROM_ADDRESS" ) = {1,2,3,4,5,6,7,8}
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This above will also work and will not need changing if you move to different chip. |
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KnowMore
Joined: 05 Jul 2010
Posts: 9
Location: Vietnam
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| Posted: Sat Jul 17, 2010 10:10 am |
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| MikeP wrote: | | Code: |
#ROM getenv( "EEPROM_ADDRESS" ) = {1,2,3,4,5,6,7,8}
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This above will also work and will not need changing if you move to different chip. |
Oh! Thank you so much!
Coming here, I find that there are so many things which I don't know about in our IDE.
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