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memoally
Joined: 25 Jan 2010
Posts: 35
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| need help about eeprom! |
 Posted: Mon Apr 19, 2010 12:06 pm |
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hello everyone.
i have some questions.here they are;
1)how can i write a float value onto eeprom?for example i want to write ''3.17'' on eeprom.how can i manage this?
2)how can i write a value which is bigger than 255 onto eeprom?for example i want to write "426" on eeprom.how could do this?
3)finally,what is the placeholder for an "int16" variable?is it %d or %lu or something different?
waiting for your helps...
_________________
compiler version: 4.105
pic: 16f876
clock frequency: 4MHz
Last edited by memoally on Mon Apr 19, 2010 12:12 pm; edited 1 time in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Apr 19, 2010 12:08 pm |
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Can you give your posts a more descriptive name than "Help Please" ?
Put in the thread title the subject that you need help on. Thanks.
(You can edit your post to do this). |
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memoally
Joined: 25 Jan 2010
Posts: 35
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| Posted: Mon Apr 19, 2010 12:23 pm |
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better now? 
_________________
compiler version: 4.105
pic: 16f876
clock frequency: 4MHz |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Apr 19, 2010 12:32 pm |
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| Quote: | | How can I write a float value onto eeprom? |
See this FAQ article:
http://www.ccsinfo.com/faq.php?page=write_eeprom_not_byte
| Quote: | | How can I write a value which is bigger than 255 onto eeprom? |
Look in these two CCS driver files. They have routines to read/write
various data types to/from eeprom. There are separate routines for
internal or external eeprom:
| Quote: |
c:\program files\picc\drivers\internal_eeprom.c
c:\program files\picc\drivers\external_eeprom.c
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Look for these routines:
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write_int16_eeprom()
read_int16_eeprom()
write_int16_ext_eeprom()
read_int16_ext_eeprom()
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| Quote: | | what is the placeholder for an "int16" variable? |
To display any integer larger than a byte, you use "%lu".
That's for unsigned integers. For signed integers, use "%ld". |
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memoally
Joined: 25 Jan 2010
Posts: 35
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| Posted: Mon Apr 19, 2010 1:31 pm |
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thank you,pcm programmer.your advices helped me.thank you again.
_________________
compiler version: 4.105
pic: 16f876
clock frequency: 4MHz |
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