[avr-libc-dev] [patch #9163] New eeprom write block function for xmega

[Pitchumani]

URL:
  <http://savannah.nongnu.org/patch/?9163>

                 Summary: New eeprom write block function for xmega
                 Project: AVR C Runtime Library
            Submitted by: pitchumani
            Submitted on: Wed 16 Nov 2016 01:04:34 PM GMT
                Category: None
                Priority: 7 - High
                  Status: Ready For Test
                 Privacy: Public
             Assigned to: pitchumani
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Xmega's eeprom shall be programmed byte and page-wise. Current eeprom write
block function loads one byte to eeprom at a time. Though it uses
page_erase_and_write command, it doesn't write page-wise.

Attached patch adds new eeprom_write_block function for xmega (written in C)
that loads eeprom with maximum of E2PAGESIZE at a time.

This patch also adds a function named ccp_write_io to write into CCProtected
(CCP) IO registers.

Tested the function with ATxmega128A1 explained board. Seems to work fine.

I tried comparing the cycle count only with simulator. New function shows
better results for writing more than 2 bytes.



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File Attachments:


-------------------------------------------------------
Date: Wed 16 Nov 2016 01:04:34 PM GMT  Name: eeprom-write-block-xmega.patch 
Size: 7kB   By: pitchumani

<http://savannah.nongnu.org/patch/download.php?file_id=38989>

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