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

[Pitchumani Sivanupandi]

On Wednesday 16 November 2016 06:34 PM, Pitchumani wrote:
> 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
>
>      _______________________________________________________
>
> 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.
Any comments/ suggestions?

Regards,
Pitchumani