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by chrisclement
Mon Dec 18, 2017 12:54 am
Forum: C/C++
Topic: Date / time not right in C
Replies: 5
Views: 4906

Re: Date / time not right in C

This snippet worked for me. Thanks!
by chrisclement
Sun Dec 10, 2017 2:09 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interrupt handling
Replies: 20
Views: 90485

Re: Interrupt handling

RPi boots up running my app which posts data to the cloud. There is no way to break out unless something fails. All I can do to stop it is to make the WIFI connection fail or remove a file in the cloud that it must have. I would like to just have a button, though.
by chrisclement
Thu Dec 11, 2014 8:30 am
Forum: Troubleshooting
Topic: Composite video and audio not working
Replies: 16
Views: 3391

Re: Composite video and audio not working

Fixed it. I edited /boot/config.txt and commented out the hdmi_force_hotplug statement. Now I can choose at boot time. Also, my Raspberry Pi hack: No need to buy that stupid cable for comp video! https://scontent-a-atl.xx.fbcdn.net/hphotos-xpa1/v/t1.0-9/p235x350/10502031_10152415305847003_132612774...
by chrisclement
Thu Dec 04, 2014 1:21 am
Forum: Troubleshooting
Topic: Composite video and audio not working
Replies: 16
Views: 3391

Re: Composite video and audio not working

Fixed it. I edited /boot/config.txt and commented out the hdmi_force_hotplug statement. Now I can choose at boot time.
by chrisclement
Mon Dec 01, 2014 1:58 pm
Forum: Troubleshooting
Topic: Composite video and audio not working
Replies: 16
Views: 3391

Re: Composite video and audio not working

I traced the video connection to the same board component as the original B model so I am convinced that it is not a cabling problem. There is a brief burst of video when the board powers up and then it goes grey. Something is turning the composite video off. There is nothing in the HDMI port. I mus...
by chrisclement
Sun Nov 30, 2014 2:41 am
Forum: Troubleshooting
Topic: Composite video and audio not working
Replies: 16
Views: 3391

Re: Composite video and audio not working

I also have a B+ running NooBs (that came with it). I have HDMI display but cannot get the composite video. I have a 4-conductor plug only and can try any combination to get the composite video but I am seeing nothing, I tried grounding the monitor to the USB shield and probed all 4 connections on t...
by chrisclement
Sat Dec 14, 2013 12:02 pm
Forum: General discussion
Topic: Making the PI to push a button
Replies: 3
Views: 649

Re: Making the PI to push a button

The best way to do this is to keep the circuits separated by what is commonly called a "dry closure". This has been done in the past with relays but driving the relay coil needs extra current booster circuitry. A device called an "optocoupler" is what you need for this. The Pi will simply light an L...

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