Go to advanced search

by jamesh
Tue Jan 22, 2019 1:12 pm
Forum: Raspbian
Topic: vcgencmd get_throttled
Replies: 5
Views: 825

Re: vcgencmd get_throttled

Ah, yes, I've just updated the PR (in fact done a new one) so my link above no longer works.
by jamesh
Tue Jan 22, 2019 1:06 pm
Forum: General discussion
Topic: Features for future Pi, voltage/current reporting.
Replies: 28
Views: 418

Re: Features for future Pi, voltage/current reporting.

Of course, these are all things that could be done using additional equipment, and in most cases, they are measurements you're only likely to do a few times, per project. So actually, the overall cost benefit analysis would show that it's much cheaper for those that need these measurements to buy th...
by jamesh
Tue Jan 22, 2019 10:55 am
Forum: Off topic discussion
Topic: Academic Survey - Solar Raspberry Pi
Replies: 1
Views: 48

Re: Academic Survey - Solar Raspberry Pi

Before anyone else flags this, I've checked the linked websites, and they seem valid, so post is staying up. Deciding whether to fill in the survey is down to the reader.
by jamesh
Tue Jan 22, 2019 9:55 am
Forum: Other projects
Topic: RaspiTouch
Replies: 2
Views: 41

Re: RaspiTouch

When posting links to pics, its probably better to posting to an image hosting site that doesn't require a login, then link here. Not everyone has a FB account.
by jamesh
Tue Jan 22, 2019 9:52 am
Forum: Troubleshooting
Topic: CM3 dual cam MMAL out of resource at high resolution
Replies: 1
Views: 23

Re: CM3 dual cam MMAL out of resource at high resolution

Have you recently upgraded the OS?
by jamesh
Mon Jan 21, 2019 4:27 pm
Forum: General discussion
Topic: Unclear on throttling
Replies: 9
Views: 147

Re: Unclear on throttling

Close, but 80008 Hex translates to 1000 0000 0000 0000 1000 binary as you say, but that means bit 3 is 1 - I don't know what that means, and bit 19 is 1 which means "Soft Temp limit has occurred". Nothing about power throttling (if I've go that right). Bit 3 is soft temp limit currently active; I'v...
by jamesh
Mon Jan 21, 2019 3:05 pm
Forum: General discussion
Topic: Unclear on throttling
Replies: 9
Views: 147

Re: Unclear on throttling

There's some preliminary documentation for vcgencmd here that explains what the command does

https://github.com/raspberrypi/document ... cgencmd.md
by jamesh
Mon Jan 21, 2019 3:01 pm
Forum: General discussion
Topic: Features for future Pi, voltage/current reporting.
Replies: 28
Views: 418

Re: Features for future Pi? (suggestion)

It might be possible to access the PMIC to get the voltage coming in, but we already have the system automatically being told if it is undervolted - that is what drivers the lightning bolt/message log entries. (It's a single 'I'm undervolted' line) Ah I forgot about that. Is it possible to show the...
by jamesh
Mon Jan 21, 2019 2:56 pm
Forum: General discussion
Topic: Features for future Pi, voltage/current reporting.
Replies: 28
Views: 418

Re: Features for future Pi? (suggestion)

It might be possible to access the PMIC to get the voltage coming in, but we already have the system automatically being told if it is undervolted - that is what drivers the lightning bolt/message log entries. (It's a single 'I'm undervolted' line) Current measurement would be quite difficult, would...
by jamesh
Mon Jan 21, 2019 1:57 pm
Forum: Troubleshooting
Topic: Involuntary shutdown - RBP3B+
Replies: 9
Views: 140

Re: Involuntary shutdown - RBP3B+

Might be time to attach a monitor to see what is going on. Going to be difficult otherwise. One thing you might try, log in using ssh then run `dmesg -w` and see if anything is put in the log there - it displays entries that come in in real time. Isn't vcgencmd get_throttled supposed to show someth...
by jamesh
Mon Jan 21, 2019 12:45 pm
Forum: Troubleshooting
Topic: Involuntary shutdown - RBP3B+
Replies: 9
Views: 140

Re: Involuntary shutdown - RBP3B+

Might be time to attach a monitor to see what is going on. Going to be difficult otherwise.

One thing you might try, log in using ssh then run `dmesg -w` and see if anything is put in the log there - it displays entries that come in in real time.
by jamesh
Mon Jan 21, 2019 11:43 am
Forum: General discussion
Topic: Making your own custom burn-n-boot Raspbian image
Replies: 9
Views: 303

Re: Making your own custom burn-n-boot Raspbian image

jahboater wrote:
Mon Jan 21, 2019 10:46 am
Helpful posts HawaiianPi and Sakaki, thanks.
Should be in a sticky!
Done. Probably best to avoid posting in the thread unless really needed, just to keep it on topic.
by jamesh
Mon Jan 21, 2019 11:42 am
Forum: Troubleshooting
Topic: Involuntary shutdown - RBP3B+
Replies: 9
Views: 140

Re: Involuntary shutdown - RBP3B+

So, does the Pi work fine with the motors detached? That would clearly indicate a power issue. Are you getting any lighting bolt symbol, or undervoltage warnings in the log just prior to shutdown?
by jamesh
Mon Jan 21, 2019 10:31 am
Forum: Troubleshooting
Topic: set wrong video mode, no display
Replies: 7
Views: 118

Re: set wrong video mode, no display

Success. I connected the good monitor and just re-installed. Then set lower resolution, I forget which. Maybe 1024 x 768 or such? The TV/monitor didn't like it much, but sort-of-worked, and I set to 800x600, and rebooted. It shows that ok. I finally nosed around to understand the partitioning. Natu...
by jamesh
Sun Jan 20, 2019 8:48 am
Forum: Troubleshooting
Topic: Can't figure out what program is starting my PiCam every bootup or how to stop it
Replies: 5
Views: 137

Re: Can't figure out what program is starting my PiCam every bootup or how to stop it

sure it does. remove the vc4 kernel module and mmal quits working, right? so, sudo lsof | grep mmal would probably determine what tasks are using the camera. No, the v4l2 driver uses mmal, but mmal is still there if the V4l2 module isn't loaded. So things like raspistill work without it. And actual...
by jamesh
Sat Jan 19, 2019 12:31 pm
Forum: Troubleshooting
Topic: Can't figure out what program is starting my PiCam every bootup or how to stop it
Replies: 5
Views: 137

Re: Can't figure out what program is starting my PiCam every bootup or how to stop it

don't know off the top of my head what drivers feed the camera but if they are not compiled into the kernel then blacklist them so that they don't load. Also, install and use (as root) lsof and search for the /dev/video* devices...assuming the API is using video for linux. The Pi camera when used b...
by jamesh
Sat Jan 19, 2019 12:22 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: vcgencmd not compiled correctly ? files missing ?
Replies: 2
Views: 72

Re: vcgencmd not compiled correctly ? files missing ?

`vcgencmd` is an app that will only work on a Pi. None of the things it interogates are on a x86 PC.
by jamesh
Fri Jan 18, 2019 5:18 pm
Forum: General discussion
Topic: Obfuscation thread
Replies: 34
Views: 3796

Re: Obfuscation thread

And I think we are done here, cleared thread of some crap, locking.
by jamesh
Fri Jan 18, 2019 5:15 pm
Forum: Troubleshooting
Topic: GPS via USB data gets corrupted if the program loop delay exceeds incoming rate. Is this a TTYUSB0 Cache problem?
Replies: 18
Views: 292

Re: GPS via USB data gets corrupted if the program loop delay exceeds incoming rate. Is this a TTYUSB0 Cache problem?

What Aydan said, althogh I suspect what is happening here that means it will probably work most of the time Messages come in at a paritcular rate, IIRC, from GPS, not particularly quickly , so you get a message, then there is quite a gap till the next one, in comparison to the message send time. whi...
by jamesh
Fri Jan 18, 2019 4:29 pm
Forum: General discussion
Topic: Obfuscation thread
Replies: 34
Views: 3796

Re: Obfuscation thread

I don't quite much agree with all of you. We know offline softwares are all crackable, but the point of obfuscation and other techniques is to make them LESS EASY to crack. If you run a business, making your product harder to reverse engineer gives you an advantage over the product which can be dup...
by jamesh
Fri Jan 18, 2019 3:36 pm
Forum: General discussion
Topic: Convert HDMI out to in and CSI2 in to out
Replies: 11
Views: 516

Re: Redirecting output to stdout

hi everyone! I have some questions please. 1- what does " redirecting all Output to stdoutput means? 2- Is it possible to redirect the CSI2 data lane and clk lane to the GPIO Output from the CM3? 3- is it possible to control a camera with a CM3 (i2c from CM3 connect to i2c from the Kamera) but stor...
by jamesh
Fri Jan 18, 2019 11:10 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Received UART data gets the MSB (sometimes the 2nd MSB) changed to 1
Replies: 2
Views: 90

Re: Received UART data gets the MSB (sometimes the 2nd MSB) changed to 1

Are you running at the correct 3.3v, the Pi doesn't like 5v on the UART?
by jamesh
Fri Jan 18, 2019 10:26 am
Forum: General discussion
Topic: Too Many Pis
Replies: 5
Views: 266

Re: Too Many Pis

I haven't been following developments for the last few years, since I bought a couple of pi2 soon after release. I now want to purchase another Pi but am a bit bewildered by the available choices. Has anyone constructed a matrix showing the features of each available model? The answer is almost alw...
by jamesh
Fri Jan 18, 2019 10:22 am
Forum: Camera board
Topic: 2 new options for raspivid
Replies: 11
Views: 287

Re: 2 new options for raspivid

The one place you may gain is over a low bandwidth link, where you can start sending the data a couple of ms earlier, and get the decoder started a similar few ms sooner. I htink the latency advantage is that even if only decoding one slice at a time, you can be decoding earlier slices whilst later...
by jamesh
Fri Jan 18, 2019 8:32 am
Forum: C/C++
Topic: fb mailbox access in order to double-buffer
Replies: 6
Views: 197

Re: fb mailbox access in order to double-buffer

I'd be inclined to do my own FB handling of double buffering, and copy your FB to the actual FB at the frame rate. I htnk ther is the ability to sync on vsync somewhere.

I suspect that changing the FB via the mailbox calls will be a bit slow. But worth trying.

Go to advanced search