[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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[Pitchumani]

Update of patch #8718 (project avr-libc):

Status: Ready For Test => Done
Open/Closed: Open => Closed

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Follow-up Comment #1:

Committed as rev 2486.
http://svn.savannah.nongnu.org/viewvc?view=rev&root=avr-libc&revision=2486

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