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by szigeti
Fri Sep 06, 2013 6:22 am
Forum: Advanced users
Topic: HDMI port restart
Replies: 3
Views: 4453

Re: HDMI port restart

Thanks your quick answer. I think I found yesterday evening the answer for my question. Need to set the following option in the /boot/config.txt hdmi_force_hotplug=1 After the restart the RPI will use always the HDMI port and never turn off. My trigger is a keyboard or a mouse it is depends on CLI o...
by szigeti
Thu Sep 05, 2013 11:34 am
Forum: Advanced users
Topic: HDMI port restart
Replies: 3
Views: 4453

HDMI port restart

How can re-enable the HDMI port if I replug my monitor after few hours.
because I unplug the monitor and few hours later when I replug it then show always black screen.

Can I use again the HDMI display?
by szigeti
Tue Feb 26, 2013 11:50 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

Hi, As a test, I am trying to read the temperature from 13 DS-18B20's. Eventually I would like to read from around 20 of them, that will be scattered around the house. At the moment, I have some python code reading the sensors and writing the data to a remote (to the RPi) MySQL DB and writing the l...
by szigeti
Wed Feb 13, 2013 7:24 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

If mine says: It was tried in place 2K ohm? I was successful in 1K8 (1.8K ohms). [email protected]:/sys/bus/w1/devices/w1_bus_master1/28-0000030a0170# cat w1_slave 50 05 4b 46 7f ff 0c 10 1c : crc=1c YES 50 05 4b 46 7f ff 0c 10 1c t=85000 I'm using the wrong resistor? 85c is the initial value of the...
by szigeti
Sat Jan 05, 2013 1:40 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

Hi again! I have two questions: A) Anybody has an idea how can I check the read command's output (by DS2408). It was good or not? It return so many times FF output because the set status was another and I can not read the latest right status from the output register. B) How can I use this switch as ...
by szigeti
Tue Dec 18, 2012 3:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

szigeti wrote: Which ASCII character is good for the "00000000" or "11111111" pin output?

Gabor
I found the answer:
echo -e '\x00' |dd of=output bs=1 count=1
and
echo -e '\xff' |dd of=output bs=1 count=1

So in this case you can set your hexadecimal value as output value.
by szigeti
Tue Dec 18, 2012 2:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

for exemple, to switch on P1,P3,P5,P7 and switch off the others, the binary is "01010101" in text it's "U". the command is: echo \U |dd of=output bs=1 count=1 (when you are in the folder of your device) it return an error but if you read with "dd if=output bs=1count=1" you can read 0055, wicht is i...
by szigeti
Thu Sep 20, 2012 8:14 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

After the loaded the (w1-ds2408) kernel module I see the following: [email protected] ~ $ ls -l /sys/bus/w1/devices/29-0000000fde25/ total 0 -r--r--r-- 1 root root 1 Sep 7 08:11 activity -r--r--r-- 1 root root 1 Sep 7 08:11 cond_search_mask -r--r--r-- 1 root root 1 Sep 7 08:11 cond_search_polarity lrw...
by szigeti
Fri Sep 07, 2012 10:58 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

After the loaded the (w1-ds2408) kernel module I see the following: [email protected] ~ $ ls -l /sys/bus/w1/devices/29-0000000fde25/ total 0 -r--r--r-- 1 root root 1 Sep 7 08:11 activity -r--r--r-- 1 root root 1 Sep 7 08:11 cond_search_mask -r--r--r-- 1 root root 1 Sep 7 08:11 cond_search_polarity lrwx...
by szigeti
Thu Sep 06, 2012 2:14 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 154327

Re: kernel patch for Dallas 1-wire interface

How can read/write information directly from the DS2408? The kernel found the devices [email protected] ~ $ ls /sys/bus/w1/devices/29-0000000fde25 driver id name power rw subsystem uevent [email protected] ~ $ but the dmesg give the following: [ 186.019990] w1_master_driver w1 bus master: Family 28 for 28...

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