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by gsh
Sat Jul 29, 2017 12:29 pm
Forum: Compute Module
Topic: Pi CM3 eMMC bus width, SD1 boot?
Replies: 6
Views: 688

Re: Pi CM3 eMMC bus width, SD1 boot?

Unfortunately I've not had time yet to look into it (and a github issue still doesn't exist for it!)
by gsh
Thu Jun 29, 2017 8:59 am
Forum: Compute Module
Topic: Pi CM3 eMMC bus width, SD1 boot?
Replies: 6
Views: 688

Re: Pi CM3 eMMC bus width, SD1 boot?

It would be possible to boot from those pins, although currently there is no config.txt parameter to set that option. Add to firmware issues in github as a request and I'll see about adding it... Unfortunately you cannot disable the boot from pins 48-53 so it'll have to fail there first which will a...
by gsh
Wed Jun 14, 2017 12:41 pm
Forum: Compute Module
Topic: CMIO+CM3 rpiboot execution /dev/sdx not created
Replies: 7
Views: 976

Re: CMIO+CM3 rpiboot execution /dev/sdx not created

This looks like a problem I had on my desk with a poor quality USB cable... We're not sure why it was the case (possibly because there is no shielding on the cable), but might be worth trying a few different cables to see if it changes. Also obviously make sure you're using the latest version of usb...
by gsh
Sat Jun 10, 2017 6:35 am
Forum: Advanced users
Topic: are start.elf & bootcode.bin is close soure?
Replies: 30
Views: 2118

Re: are start.elf & bootcode.bin is close soure?

It's a perfectly good comparison to understand the amount of code required. If it requires 5k of arm code then it's going to be a similar ballpark for the vpu.
by gsh
Thu Jun 08, 2017 3:54 pm
Forum: Advanced users
Topic: are start.elf & bootcode.bin is close soure?
Replies: 30
Views: 2118

Re: are start.elf & bootcode.bin is close soure?

5k won't fit so it'd require some pretty significant slashing to get it working...

Not likely to happen
by gsh
Wed Jun 07, 2017 7:56 am
Forum: Advanced users
Topic: are start.elf & bootcode.bin is close soure?
Replies: 30
Views: 2118

Re: are start.elf & bootcode.bin is close soure?

So can you fit it in 2kbytes of ARM assembler?
by gsh
Mon Jun 05, 2017 4:12 pm
Forum: Advanced users
Topic: are start.elf & bootcode.bin is close soure?
Replies: 30
Views: 2118

Re: are start.elf & bootcode.bin is close soure?

IPV6 theoretically could be implemented in bootcode.bin but it cannot be implemented in the bootrom... So although you could network boot it would require that you have an SD card with bootcode.bin on it... Is that what you're asking? It's also got to be implemented in < 2kb code to suitably fit wit...
by gsh
Tue May 30, 2017 3:16 pm
Forum: Compute Module
Topic: CM3 vs. other commercial platforms
Replies: 12
Views: 934

Re: CM3 vs. other commercial platforms

Hi, Can you provide an example competitor to the CM3 who provide this type of information? We try to provide as much information as possible for the CM3 device and the datasheet was our attempt at providing this information (since we offered even less with CM). It would be useful to understand how a...
by gsh
Sat May 27, 2017 5:47 am
Forum: Compute Module
Topic: CM3 and rpiboot
Replies: 25
Views: 3074

Re: CM3 and rpiboot

I'd suggest everyone try again, I've checked in a new version of rpiboot which has a bunch of fixes in the code...

Gordon
by gsh
Tue May 23, 2017 8:45 am
Forum: General discussion
Topic: Fake Pi3 or just very dubious quality?
Replies: 17
Views: 940

Re: Fake Pi3 or just very dubious quality?

Please provide high resolution photos of all views of the board to

gordon@raspberrypi.org

Thanks

Gordon
by gsh
Mon May 22, 2017 12:54 pm
Forum: Compute Module
Topic: CM3 rpiboot get serial number
Replies: 5
Views: 549

Re: CM3 rpiboot get serial number

It would be possible to add the board revision as the USB serial number...

Will try and add it with the next bunch of changes

Gordon
by gsh
Wed Apr 19, 2017 2:17 pm
Forum: B+ addons
Topic: B+HAT EEPROM
Replies: 7
Views: 941

Re: B+HAT EEPROM

There's no reason you cannot emulate the EEPROM. When we say no EEPROM no HAT then we mean that it must respond to the eeprom challenge at boot time. So as long as you can do that then it's fine.

Gordon
by gsh
Thu Apr 13, 2017 5:45 am
Forum: Official Foundation Display
Topic: STICKY: Official Touchscreen Display FAQ
Replies: 47
Views: 21284

Re: Official Touchscreen Display FAQ

Yes the ribbon connector is the same...
by gsh
Wed Mar 15, 2017 9:44 am
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 438
Views: 98326

Re: USB boot now working on Pi3

This is probably because it can't find the filesystem, are you sure about the root filesystem is set correctly in cmdline?

Also remove 'quiet' from the cmdline and you should get a little more information

Gordon
by gsh
Mon Mar 13, 2017 9:47 am
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 438
Views: 98326

Re: USB boot now working on Pi3

When using the CMIO board, you will need to take note of the OTG pin on the board. If you look closely at J6 (one of the two big connectors), near the power input there is a pin marked USB_OTGID. This is pulled to ground through R12. Since the OTG ID pin is normally pulled low then it will default t...
by gsh
Sun Mar 12, 2017 8:11 am
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 438
Views: 98326

Re: USB boot now working on Pi3

Thanks for that, it would be very much appreciated if you create a pull request to the documentation in github to make the changes (just go to the page you want to change in the documentation and click the github link at the bottom of the page, then edit the file and submit a pull request) The 1TB H...
by gsh
Wed Mar 01, 2017 9:31 am
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 12
Views: 1189

Re: CM3 always crashes within minutes under load

Can you confirm the system that you have bought? Where did you get it?

Just trying to confirm information about the device.

Thanks

Gordon Hollingworth
by gsh
Mon Feb 27, 2017 4:59 pm
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 12
Views: 1189

Re: CM3 always crashes within minutes under load

Can you retest with a standard Raspbian release with nothing else enabled. It should not be a problem up to 85 degrees, which is when the throttling is started.

It may also be useful to do

vcgencmd measure_volts
vcgencmd measure_clock arm

while you are running the test...
by gsh
Mon Feb 27, 2017 9:59 am
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 12
Views: 1189

Re: CM3 always crashes within minutes under load

Is this using a standard Raspbian image with no changes?

Gordon
by gsh
Tue Feb 21, 2017 9:02 am
Forum: Compute Module
Topic: CM3 with Cameras [solved]
Replies: 30
Views: 2527

Re: CM3 with Cameras [solved]

Have you checked the GPIO numbers are the same as those in the dt-blob.bin? As far as I know this is still working although we don't have it as a regression test at the moment. Also are you sure that you are using two camera converter boards (or the Pi Zero camera connector) and not accidentally usi...
by gsh
Mon Feb 20, 2017 7:04 pm
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 438
Views: 98326

Re: USB boot now working on Pi3

Although the changes are on the master branch they are not yet on the Raspbian image and therefore you'll still need the rpi-update just get rid of the 'BRANCH=next' (master is the default branch)

Gordon
by gsh
Mon Feb 20, 2017 10:40 am
Forum: Compute Module
Topic: Potential HDMI licensing issue with compute module?
Replies: 26
Views: 2789

Re: Potential HDMI licensing issue with compute module?

The HDMI license is paid for by Raspberry Pi up front.

When it comes to communicating internally you can obviously just say it's a DVI signal (there are no HDMI connectors) but that does mean you can't then claim you are an HDMI device (or use the HDMI logo).

Gordon
by gsh
Sat Feb 11, 2017 4:43 pm
Forum: Compute Module
Topic: SD on CM3 module
Replies: 24
Views: 3005

Re: SD on CM3 module

Can you attach a scope and probe the frequency of the SDCLK?
by gsh
Sat Feb 11, 2017 11:16 am
Forum: Compute Module
Topic: SD on CM3 module
Replies: 24
Views: 3005

Re: SD on CM3 module

Phil,

Does the dtoverlay=sdio also enable the pullups?

If not then that's likely to be the problem... I doubt the issue is with speed because it is even failing to get the status command (which is all done over the SDCMD wire so width of data has no effect)

Gordon
by gsh
Sat Feb 11, 2017 6:53 am
Forum: Compute Module
Topic: SD on CM3 module
Replies: 24
Views: 3005

Re: SD on CM3 module

Do you have external pull ups on the SD lines?

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