pic_data_eeprom

reading/writing of PIC's data EEPROM

Author Stef Mientki, Copyright (c) 2002..2006, all rights reserved.
Adapted-by Sebastien Lelong, Rob Hamerling.
Compiler >=2.4i

Description

Read from or write to EEPROM/data a byte, word or double word.
Available procedures:
  * data_eeprom_read(,)
  * data_eeprom_write(,)
  * data_eeprom_read_word(,)
  * data_eeprom_write_word(,)
  * data_eeprom_read_dword(,)
  * data_eeprom_write_dword(,)
Available functions:
  *  = data_eeprom()
  *  = data_eeprom_word()
  *  = data_eeprom_dword()
In all cases  is a position relative to the beginning of
EEPROM/data memory, thus starts at 0.
Examples of use:
  * Read a byte of EEPROM at offset 7 into x:
        var byte x
        data_eeprom_read(7, x)
  * Read a word from EEPROM at offset 4 into y:
        var word y
        y = data_eeprom_word(4)
  * Write a byte to EEPROM at offset 18:
        data_eeprom_write(18, 0b1111_0000)


Notes

- Write-protect bits in configuration memory may prohibit writing.
- Writing to locations outside the available memory range may have
  unexpected effects!
- Summary of changes
  + Changed byte-offset to word-offset for larger EEPROMs with 18Fs
  + Offset and flags settings for read and write in separate procedure.
  + Moved check for write completed ahead of read and write, for
    performance (ahead of read needed for read back of same offset).
  + added 'pragma inline' to several procedures
  + some other code optimizations
  + added support for PICs with deviating register names, like 'EEDAT'
    or EEDATL in stead of 'EEDATA' and EEADRL in stead of EEADR.


Dependencies

No dependency found



Summary

Global variables/contants

Procedures

Private

Functions


API details

Global variables/contants

Procedures

Private

Functions


Related samples

Here are the list of samples which use this library:

16f648a16f648a_data_eeprom.jal
16f8816f88_data_eeprom.jal
16f8816f88_remember_me.jal
18f24218f242_data_eeprom.jal
18f262018f2620_data_eeprom.jal