OK, Paul, as I told Christian before:
This is precisely how my devices are connected:
PC's DB9M (PC's standard 9-pin male) <---> DB9F-to-DB25M (a standard 9-pin
to 25-pin converter) <---> DS9097E (Maxim's 25 pin Serial Adapter with a
RJ11 port) <---> RJ11 cable <---> DS2781K (Maxim's voltage sensor).
Here are other things you asked:
1. Wrong device name:
Nope ... /dev/ttyS0 is the only serial file descriptor that works for me
... I tested with my own serial communication codes for grabbing and
transferring some data over it .... also owfs only recognizes /dev/ttyS0 ...
otherwise it gave an error: "Could not detect DS9097 (passive) ...."
2. Wrong device permission:
# id
uid=0(root) gid=0(root) groups=0(root)
# ls -al /dev/ttyS0
crw-rw---- 1 root dialout 4, 64 2007-09-15 21:17 /dev/ttyS0
3. Wiring/voltage problem
# I can sense 7.2 battery voltage through Windows (which works on Maxim's
USB chip with its Windows driver).
4. My PC's serial port config:
/dev/ttyS0, Line 0, UART: 16650, Port: 0x03f8, IRQ: 4
Baud_base: 9600, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test
5. When I can with debug level, it shows this:
> owfs --error_level=9 --foreground -d /dev/ttyS0 /mnt/1wire
CONNECT: fuse mount point: /mnt/1wire/
CALL: PARSENAME path=[]
CONNECT: Cannot detect DS2480 or LINK interface on /dev/ttyS0.
DEBUG: COM_close: flush
DEBUG: COM_close: restore
DEBUG: COM_close: close
CALL: PARSENAME path=[]
DEBUG: fuse_mnt_opt=[(null)]
DEBUG: fuse_open_opt=[(null)]
unique: 1, opcode: INIT (26), nodeid: 0, insize: 56
INIT: 7.7
flags=0x00000003
max_readahead=0x00020000
INIT: 7.8
flags=0x00000001
max_readahead=0x00020000
max_write=0x00020000
unique: 1, error: 0 (Success), outsize: 40
Don't know why "CONNECT: Cannot detect DS2480 or LINK interface on
/dev/ttyS0" is appearing.
Now, inside /mnt/1wire, although I can see the owfs file system being
mounted, NO temp/voltage/current info is pulled out from /dev/ttyS0 (as I
said, even cat /dev/ttyS0 is not showing any info).
Any suggestion?
----
Paul Alfille-2 wrote:
>
>>
>> Lets be systematic.
>> DS9097 or DS9097U
>> Any problems with permissions? (root?)
>> Try running with --error_level=9 --foreground and look at the starting
>> messages.
>>
>> On 15 Sep 2007 01:05:34 -0000, *suman sarkar* <[EMAIL PROTECTED]>
>> wrote:
>>
>>
>> I tried some voltage sensing with DS2781K Maxim chip, which is connected
>> to a DS9097 serial adapter through RJ11.
>>
>
> Ok, so the passive adapter.
>
> I've installed all necessary software, but not been able to pull out any
>> information from the mounted directory (/mnt/1wire). My laptop's serial
>> port
>> is set to baud rate 9600.
>>
>> Here is what I did:
>>
>> owfs -d /dev/ttyS0 /mnt/1wire.
>>
>> This command does not give any error, and only creates a 1wire
>> directory,
>> where I can see subdirectories: bus.0, settings, structure, statistics,
>> system, and uncached.
>>
>
> Ok, so owfs and fuse works. The problem is purely with reading the serial
> device.
> Possible reasons are:
> 1. Wrong device name
> 2. Wrong device permissions
> 3. Wiring/voltage problem
>
> Even "cat /dev/ttyS0" does not show any information on ttyS0 port.
>>
> Not surprising. You could try "ls -al /dev/ttyS0" to see if it is a
> correct
> character device. Since all 1-wire devices are passive, the bus master
> 9097,
> generates all the traffic.
>
>
> So, I am at a loss ... Is DS2781K a owfs supported device ... or am I
>> missing something? .... Any help will be helpful.
>>
>
> Yes the DS2781 is supported.
>
> Again, the "owfs --error_level=9 --foreground -d /dev/ttyS0 /mnt/1wire"
> would give more information
>
> Paul Alfille
>
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