[En-Nut-Discussion] Save Data to the EEPROM
damian at commtech.com.au
Wed Jun 2 04:35:04 CEST 2004
thats what i have done. started my db at 0x81 in eeprom.
From: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Zheng Anding
Sent: Wednesday, June 02, 2004 10:18 AM
To: Ethernut User Chat (English)
Subject: Re: [En-Nut-Discussion] Save Data to the EEPROM
I thought the first 64 bytes of EEPROM are reserved by Nut/OS and the
next 64 bytes are reserved by Nut/Net, we can use the remaining 3968
bytes, according to the software manual...
Harald Kipp <harald.kipp at egnite.de> wrote:
>I found the commands EEPROM_READ and EEPROM_WRITE.
>My problem now is to get the value for "addr". There are some
>value in the examples like CONFNET_EE_OFFSET, but whats the
value I need?
There's no pre-defined value, AFAIK. I recommend to
start at address 512. Anything from 0 to 511 is
weakly reserved for Nut/OS.
>Perhaps anybody knows a another way to save the Data?
No, EEPROM is the right place. Have a look into
nut/os/confos.c, NutLoadConfig() and NutSaveConfig().
This works with ICC and GCC. Note, that the value
is read before writing, which reduces wear out.
(Was it Alexander, who gave this hint?)
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