[avr-libc-dev] [patch #8718] Enable EEPROM memory map only devices with EEPROM Data Memory Mapping Enable bit (EEMAPEN)

[Pitchumani]

URL:
  <http://savannah.nongnu.org/patch/?8718>

                 Summary: Enable EEPROM memory map only devices with EEPROM
Data Memory Mapping Enable bit (EEMAPEN)
                 Project: AVR C Runtime Library
            Submitted by: pitchumani
            Submitted on: Mon 17 Aug 2015 09:23:48 AM GMT
                Category: None
                Priority: 9 - Immediate
                  Status: Ready For Test
                 Privacy: Public
             Assigned to: pitchumani
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

For Xmega devices, data memory mapping of the EEPROM section can be enabled by
setting EEPROM Data Memory Mapping Enable bit (EEMAPEN). This allows us to
load/store EEPROM using load/store instructions.

But for Xmega E series, EEPROM is memory mapped in the data memory by default.
Data addresses 0x1000 to 0x1FFF are reserved for EEPROM.

So, setting EEMAPEN bit is not required for Xmega E series devices.

This patch modifies eeprom read/write functions to do memory map only if
EEMAPEN bit exists.



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File Attachments:


-------------------------------------------------------
Date: Mon 17 Aug 2015 09:23:48 AM GMT  Name: eeprom-mem-map.patch  Size: 4kB  
By: pitchumani

<http://savannah.nongnu.org/patch/download.php?file_id=34665>

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