Raspberry Pi Forums

I would suggest a switch In the default position it connects the HDMI HPD to the hotplug input pin on the Raspberry Pi CM in the other position it forces HPD to CM This way you can always force hotplug (if it doesn't detect hotplug it'll use composite output anyway so you don't need a third position)

That is correct, it should work... It is indeed a trove of knowledge, for example it allows you to hand edit the PLL settings and clock routing for the device, unfortunately this is very complex and therefore I've not tried to document everything. But if there's a specific requirement you have then ...

Are you sure you've connected the device up correctly?

I would go check the i2c signals with a scope

You can invert the sense of the hotplug pin by adjusting it in the dt-blob.bin

https://www.raspberrypi.org/documentati ... uration.md

You can download the default dts file from https://www.raspberrypi.org/documentati ... t-blob.dts

Gordon

What does your config.txt look like, just give us the lines that are not commented out...

Do you have any "device-tree=" line which may stop it from working

Have you added an overlay for your RTC?

Gordon

It'll work fine for 3v3

This is how it was tested originally.

Gordon

I don't believe I've had this problem, what is the host operating system? Are you running rpiboot on Linux or Windows? I've been diagnosing the problem with some compute modules not booting properly through eMMC and have got somewhere but still quite some way from an answer at the moment... Should b...

If that is running when you're not connected then it looks like a different driver is talking to the device...

Something must be sending URBs to the device...

Are you sure you've not got a driver loaded for that device?

try running

usb-devices

Gordon

Yeah,

Might have to hang until I've got some free time (not had a minute in the last two years but you never know!)

Gordon

Are you testing all the return values from the libusb functions? Does it return success for each access?

Do you have access to a USB analyser? Either that or use the kernel usb analysis

https://www.kernel.org/doc/Documentation/usb/usbmon.txt

It may be possible to add a little patch to the code that I implemented a while back that synchronises the left and right frames by adding / removing a blanking interval line from one of the cameras. Unfortunately I've not got it to hand and would have to pick it back up again but it is possible... ...

Plus we guaranteed that the original CM will still be available for volume customers anyway, so just because we bring out a new version doesn't mean we drop the old one CM2 would be plug in compatible with any current CM boards so you could have an upgrade path without changing the hardware (just re...

Not sure, how many of these are you saying you have? Is this 3 out of 10 or 3 out of 1000? The second stage usbbootcode.bin is clearly being sent to the compute module and then being executed since the USB disconnects... But it should immediately re-enumerate... I'd suggest, first of all to make sur...

We used

ATSHA204-SH-DA

Gordon

We have it so that you can control updating from the external server, the server challenges the Slice, the Slice encrypts / signs a packet using the encryption hardware and returns to the server who can check it comes from a valid Slice. Actually all theory we've never put it into practice but it be...

There are some OTP bits that you can use for this purpose, @popcornmix will have to weigh in to describe how to program them but they should enable you to identify it. For Slice we added a simple security device which we program a key into so could always confirm the validity of hardware in a more s...

Not sure I understand what it is that you can't get working... What is it that you are trying to move and where are you trying to move it, your description above isn't clear...

You said that it worked when you moved it to pin18?

Gordon

If you've changed the dt-blob.bin to move the PWM to the other set of pins then it should do this for you.

You can check using the gpiostate tool:

apt-get install raspi-gpio
gpiostate

Timo,

Did you find a solution to this?

Gordon

There is no limit to the availability of the Compute Module, if you want 1m devices then RS and Farnell will be able to supply them, if you're actually interested in that sort of quantity then they'll talk to you directly, if you're just interested in a couple of thousand then they have those sittin...

I think you need to read the documentation for the dt-blob.bin https://www.raspberrypi.org/documentation/configuration/pin-configuration.md At the bottom is a link to the default configuration, here you can see how the disk activity LED is moved from pin 16 to 47 on a rev 1 to B+ resp. There's nothi...

Yes the order of apt-get first then rpi-update second is important... The two systems do not know about each other

Gordon

Can you find out which update actually caused the problem? I should be able to have a look at the code to understand what changed...

Gordon

If this is just for the USB signalling then I think you'll be fine, if you compare the quality of the traces on the PCB with the quality of some of the Chinese manufactured USB cables available in the world.... The main problems you'd experience when going to final production would be issues getting...

The files that say which is the default are stored in the /dev/mmcblk0p3 partition (the settings partition) you should be able to alter them to change the decision

Gordon

Search found 1382 matches

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