maybe if we include a
ROM/
directory and a
SCRATCH/
directory
one with information from rom and other with informations from scratch
could help the owfs client to make a reset logic, and don't change the
owserver logic :)
this could be very very better
Em 29 de fevereiro de 2012 23:44, Roberto Sp
the new logic could be:
start loop:
start conversion
read scratch
if we don't have a 85degree exit loop
else, we got a 85 degree...
read rom
check if rom and scratch value are =, if not exit loop (we have a
real 85 degree)
if they are "=" we have a reseted device... :(
chang
ds18s20 don't allow this... but ds18b20 could work :D what you think?
Em 29 de fevereiro de 2012 23:33, Roberto Spadim
escreveu:
> maybe the configuration eeprom register could help...
> when we read with 9 bits we could change eeprom to 10 bits, set
> current to 9bits execute conversion algorith
maybe the configuration eeprom register could help...
when we read with 9 bits we could change eeprom to 10 bits, set
current to 9bits execute conversion algorithm
the eeprom configuration never could be = current conversion bit, or
we know that device was reseted and the 85 degree is wrong
there'
yes, well i think owfs is doing 1second wait time of pullup with
serial-onewire dallas converter (i don't remeber it exactly i think
it's ds2480b)
the question is... it's works but sometimes it work wrongly
i was thinking something like...
write alarm high temperature of user value to eeprom and
i was reading datasheet..
http://datasheets.maxim-ic.com/en/ds/DS18B20.pdf
there's a eeprom memory portion that is copied when device startup
could we set for example 0xff at this position
and after setting , set the current value to 0x00 ?
when device is running fine value is 0x00
when device is
Even if they are powered you have to make sure you are waiting long enough
before taking a reading
after a temperature convert. At 12bits the DS18B20 takes as long as the DS18S20
(around 750mS).
On 2/29/2012 8:12 PM, Roberto Spadim wrote:
> yes hehe my is the second, i connect 5v, 0v and owbus
yes hehe my is the second, i connect 5v, 0v and owbus
does ds18b20 have a crc or another feature that shows the reset status
or something else? i could check for example
read 85 degree
read the crc value (or another reset value)
start of infinite loop:
read 85 degree again
read the crc va
Hi Roberto,
On 02/29/2012 08:31 PM, Roberto Spadim wrote:
> hi guys, i'm having a lot of problem with ds18b20 and 85 degree reads
> what are every body doing when this occur?
> today i read to times when this occur, and if it's 85 em both i allow 85
> degree
> anyone know another good solution?
hi guys, i'm having a lot of problem with ds18b20 and 85 degree reads
what are every body doing when this occur?
today i read to times when this occur, and if it's 85 em both i allow 85 degree
anyone know another good solution?
--
Roberto Spadim
Spadim Technology / SPAEmpresarial
---
Why is there no 'power' value for this device? Is there any way to
detect if it is powered or not?
Thanks
Mick
--
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - b
From the info on the RaspberryPi site they are only available from RS
Components http://rswww.com/ or Farnell http://farnell.com/ both have
branches across the world, although from what p4trykx said earlier some
may not know too much about it. I have seen a couple on eBay but I am
sure they a
i´m in brazil, do you have a global link to buy raspi?
i can compile owfs to arm devices without problems
Em 29 de fevereiro de 2012 15:23, p4trykx escreveu:
> Dnia 29.02.2012 o 18:20 Roberto Spadim Roberto
> Spadim napisał(a):
>
>> i think anyone have buyed a working one
>> do you have a
I got up early as well, there is an announcement on the Raspberry Pi
site http://www.raspberrypi.org/
By 6:05 both the RS Components and Farnell websites were unavailable, I
tried for ages and eventually managed to register an interest on the RS
site and then put in an order on the Farnell site
Dnia 29.02.2012 o 18:20 Roberto Spadim Roberto
Spadim napisał(a):
> i think anyone have buyed a working one
> do you have a link to buy one?
I got up in the morning special to buy one but despite previous
announcements Raspis weren't available in Poland.
Farnell and RS Poland don't kno
i think anyone have buyed a working one
do you have a link to buy one? i can work on it and compile a owfs
complete suite (http,ftp,fuse,etc)
Em 29 de fevereiro de 2012 14:11, Joris Meijerink
escreveu:
> Hi,
>
> Anybody planning to fiddle around with the Raspberry Pi and owsf combo?
> Looks
Hi,
Anybody planning to fiddle around with the Raspberry Pi and owsf combo?
Looks like a pretty promising combo. The raspberry is debian based so
shouldn't be to big a problem.
Joris
--
Virtualization & Cloud Manageme
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