hi,
for 0xfc family command sequences, it basically your description with a
commit after crc on write, see detail starting on page 6 of this datasheet:
http://www.brain4home.eu/attachments/BAE0910%20datasheet.pdf
For the list of commands, I did'nt find a consolidated information,
traversing maxim datasheets and owfs source is the only solution I found...
Pascal
2010/2/15 <[email protected]>
> I scanned briefly through the 2760 code and datasheet, since that's the
> only stuff i really have looked into so far
>
> It appears that there's a read/write memory function (0x69 and 0x6C) that
> give an offset and just suck/blast data until the master has had enough.
>
> This has the disadvantage of no CRC.
>
>
> For your stuff, what are the command codes, sequence? something like this
>
> 0x##, OO, LL, <data....data>, CRC
>
> Where ## is the command byte OO is offset byte, and LL is length byte.
>
> I'll probably implement the 0x69 and 0x6c functions first, since they are
> straightforward.
>
> Is there a list of known 1-wire commands anywhere that i could reference? I
> don't want to reinvent more than i have to.
>
>
> -tmk
>
> ----- Original Message -----
> From: "Pascal Baerten" <[email protected]>
> To: "OWFS (One-wire file system) discussion and help" <
> [email protected]>
> Sent: Monday, February 15, 2010 1:39:33 AM GMT -08:00 US/Canada Pacific
> Subject: Re: [Owfs-developers] How can i get a slave serial number
> allocated?
>
> Basically, you have a readmem(pos,length,buffer) and
> writemem(pos,lenght,buffer) that cover practically any situations.
> the only difficulty could be the CRC16 that your avr has to calculate for
> data integrity.
> for read, up to 255 bytes could be read at once, for write, as crc is
> checked before write commit, up to 16bytes max (size of working buffer) per
> writes.
>
> By default, 128bytes are exposed by 0xfc devices, but the addressable range
> fit in 16bits.
> If less than 128bytes need to be exposed on your avr, simply mask upper
> address bits to roll over your effective area.
>
> On owfs side, even without changes, you could then access the avr memory
> via the memory property that returns the 128bytes. Also, for debugging
> purpose, a writebyte property accepts a word value: high 8bit are assumed
> as low address, and low 8bits are the value to write.
>
>
> Pascal
>
> www.brain4home.eu
>
>
> 2010/2/14 <[email protected]>
>
>> I'll have to look at your structure.
>>
>> For mine, i was planning on just having 2 or 4 commands: readmem(),
>> writemem(), readbyte(byte#), writebyte(byte#)
>>
>> if yours is similar, i don't see any reason not to.
>>
>> -tmk
>>
>>
>> ----- Original Message -----
>> From: "Pascal Baerten" <[email protected]>
>> To: "OWFS (One-wire file system) discussion and help" <
>> [email protected]>
>> Sent: Sunday, February 14, 2010 1:29:01 AM GMT -08:00 US/Canada Pacific
>> Subject: Re: [Owfs-developers] How can i get a slave serial number
>> allocated?
>>
>> Hi tmk,
>>
>> Well, I'm nearly sure that maxim-dallas will not accept to assign family
>> id to others. Instead of facing an explicit no way, I just count on
>> maxim-dallas tolerance and selected an unassigned familly id near the end of
>> the range...
>> To avoid consuming anarchically multiple family id, chips support a simple
>> command (read type 0x12) to identify chip model.
>>
>> There are still enhancement needed to have OWFS supporting dynamic
>> property assignement but the idea is to have within the same 0xfc family
>> multiple device types corresponding to a separate directory.
>>
>> If you could conform to the simple set of 0xfc commands, why not share
>> this family id?
>>
>> Pascal
>>
>>
>> 2010/2/14 <[email protected]>
>>
>>> Hi folks,
>>>
>>> This one's probably mostly for Paul, but Pascal might know too :)
>>>
>>> I'm doing some solar heat collection automation, and i was going to try
>>> and hook an arduino (well, actually just an AVR, but close enough) up to the
>>> 1-wire bus, so i could have all my info in the same place.
>>>
>>> I'd have to write some code to emulate a 1-wire slave device, and i was
>>> wondering if I can just pick any slave ID/serial #/family ID or if there is
>>> a special experimental range.
>>>
>>> Hope someone on here knows the answer.
>>>
>>> Cheers
>>> -tmk
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
>>> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
>>> http://p.sf.net/sfu/solaris-dev2dev
>>> _______________________________________________
>>> Owfs-developers mailing list
>>> [email protected]
>>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>>
>>>
>>
>>
>> --
>> Pascal
>>
>> ------------------------------------------------------------------------------
>> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
>> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
>> http://p.sf.net/sfu/solaris-dev2dev
>>
>> _______________________________________________ Owfs-developers mailing
>> list [email protected]
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>>
>> ------------------------------------------------------------------------------
>> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
>> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
>> http://p.sf.net/sfu/solaris-dev2dev
>> _______________________________________________
>> Owfs-developers mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>>
>
>
> --
> Pascal
>
> ------------------------------------------------------------------------------
> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
> http://p.sf.net/sfu/solaris-dev2dev
>
> _______________________________________________ Owfs-developers mailing
> list [email protected]
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
> ------------------------------------------------------------------------------
> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
> http://p.sf.net/sfu/solaris-dev2dev
> _______________________________________________
> Owfs-developers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
--
Pascal
www.brain4home.eu
------------------------------------------------------------------------------
SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
http://p.sf.net/sfu/solaris-dev2dev
_______________________________________________
Owfs-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/owfs-developers
