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by gsh
Mon Jul 16, 2018 10:33 am
Forum: Official Foundation Display
Topic: Comparison with 7" Non-touch Waveshare LCD
Replies: 1
Views: 54

Re: Comparison with 7" Non-touch Waveshare LCD

What's the bet they did their emc testing in China???

:lol:
by gsh
Wed Jul 11, 2018 3:09 pm
Forum: Troubleshooting
Topic: Netboot issues with mod 3 B+
Replies: 14
Views: 357

Re: Netboot issues with mod 3 B+

It's not clear what you mean here...

The bootcode.bin UART output Stephan has captured shows that it is correctly initialised and sending DHCP requests. I would suggest that your TCP dump is not working correctly.
by gsh
Mon Jul 09, 2018 3:50 pm
Forum: Troubleshooting
Topic: Netboot issues with mod 3 B+
Replies: 14
Views: 357

Re: Netboot issues with mod 3 B+

Yes, as PhilE says above, there is a difference between 'bootcode' and 'bootrom' the boot sequence is: 1) BootROM executes on the chip, enumerates the USB devices and looks for a device matching the LAN9500 USB to Ethernet controller. It broadcasts a DHCP request and then gets a reply that includes ...
by gsh
Thu Jul 05, 2018 11:00 am
Forum: Compute Module
Topic: Booting CM3 from memory stick
Replies: 2
Views: 144

Re: Booting CM3 from memory stick

Yes this is possible, but there are a couple of things you need to do, first off you need to set the program_usb_boot_mode=1 bit in the otp (just add to config.txt and boot...) you should be able to do this over the USB device boot, using usbbootgui on a Raspberry Pi or our x86 release. You can just...
by gsh
Thu Jul 05, 2018 10:11 am
Forum: Compute Module
Topic: What would be the next step up from CM3?
Replies: 26
Views: 1116

Re: What would be the next step up from CM3?

If you want to develop a prototype, the CM3 is the best way to do this. I assume you've already developed and tested your system on a Pi3 and optimised it? If not I'd start there, optimising the software is the best way of getting to the next step. With software improvements, you can usually get far...
by gsh
Thu Jun 28, 2018 7:42 am
Forum: Compute Module
Topic: Setting up compute 3
Replies: 7
Views: 341

Re: Setting up compute 3

Does the device appear in the device manager?
by gsh
Wed Jun 27, 2018 7:23 pm
Forum: Compute Module
Topic: Mass deployment on Raspberry Compute Module 3.0
Replies: 6
Views: 613

Re: Mass deployment on Raspberry Compute Module 3.0

Not exactly as it is, but Scriptexecutor is a great example of a use of buildroot. You could use it to create your pre-boot system

Gordon
by gsh
Wed Jun 27, 2018 5:41 pm
Forum: Compute Module
Topic: Setting up compute 3
Replies: 7
Views: 341

Re: Setting up compute 3

Only other thing to check is the quality of USB cable, there are often issues with poor quality cables...

Other thing to do is plug into a Raspberry Pi and see what dmesg gives you
by gsh
Wed Jun 27, 2018 12:54 pm
Forum: Compute Module
Topic: Setting up compute 3
Replies: 7
Views: 341

Re: Setting up compute 3

1) The jumper must be in the EN position 2) Connect the PC through micro USB to to J15 (USB SLAVE connector) 3) Connect micro USB power supply to USB POWER socket (you cannot both power and connect USB with a single connector) 4) Run rpiboot from the menu, it should sit saying "Waiting for BCM2835/6...
by gsh
Wed Jun 27, 2018 12:43 pm
Forum: Compute Module
Topic: Mass deployment on Raspberry Compute Module 3.0
Replies: 6
Views: 613

Re: Mass deployment on Raspberry Compute Module 3.0

All of the things you suggest are possible, but they will all require you to do a lot of stuff... For example, you can make it always boot into a buildroot image at boot time, then pivot_root into a separate filesystem (i.e. a USB flash drive) Or you could just use a chroot to a secondary filesystem...
by gsh
Tue Jun 26, 2018 1:31 pm
Forum: Compute Module
Topic: Lan9512 stops working
Replies: 9
Views: 278

Re: Lan9512 stops working

Have you seen this post?

viewtopic.php?f=98&t=216330#p1331833
by gsh
Tue Jun 26, 2018 12:57 pm
Forum: Compute Module
Topic: cm3 network boot problem, rpiboot emmc overload problem
Replies: 11
Views: 407

Re: cm3 network boot problem, rpiboot emmc overload problem

Note: program_mac_address is something you add to the config.txt this is then a permanent change (it is written to OTP inside the SOC).
by gsh
Tue Jun 26, 2018 12:52 pm
Forum: Compute Module
Topic: cm3 network boot problem, rpiboot emmc overload problem
Replies: 11
Views: 407

Re: cm3 network boot problem, rpiboot emmc overload problem

the problem is, that the mac address used for the dhcp request of the cm3 is not the one of the lan9512 of the gumstix carrier routed to the rj45. therefore i cannot see it on the net. it seems to be a raspberry mac address? Yes it will be, the bootrom doesn't read the MAC address out of the device...
by gsh
Fri Jun 22, 2018 3:00 pm
Forum: Compute Module
Topic: cm3 network boot problem, rpiboot emmc overload problem
Replies: 11
Views: 407

Re: cm3 network boot problem, rpiboot emmc overload problem

Yep, works fine with a CMIO3 board and the LAN9512, LAN9514 and LAN9515 demonstration boards. Try enabling bootcode UART using: sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin Using that bootcode.bin as the only file on the eMMC Then connect up a serial cable with 115200 baud 8 bits no parity on...
by gsh
Fri Jun 22, 2018 12:11 pm
Forum: Compute Module
Topic: CM3 + IoT
Replies: 9
Views: 1452

Re: CM3 + IoT

How are you trying to access them, through /sys or through a c implementation like raspi-gpio

Gordon
by gsh
Thu Jun 21, 2018 2:34 pm
Forum: Compute Module
Topic: cm3 network boot problem, rpiboot emmc overload problem
Replies: 11
Views: 407

Re: cm3 network boot problem, rpiboot emmc overload problem

Use a scope to check the signals
by gsh
Thu Jun 21, 2018 12:35 pm
Forum: Compute Module
Topic: cm3 network boot problem, rpiboot emmc overload problem
Replies: 11
Views: 407

Re: cm3 network boot problem, rpiboot emmc overload problem

By default, the CM3 has SD card boot enabled first and then falls back to USB device boot. Device boot is when the Pi appears as a USB device when plugged into a PC (i.e. it's how we program using rpiboot). And clearly, this worked for you originally. You then enabled host USB boot, this is a separa...
by gsh
Thu Jun 21, 2018 7:51 am
Forum: Compute Module
Topic: LAN9514 chip troubleshooting
Replies: 9
Views: 527

Re: LAN9514 chip troubleshooting

Where is your LAN_RUN connected? Have you got this wired as recommended by Microchip?
by gsh
Wed Jun 13, 2018 10:30 am
Forum: Compute Module
Topic: CM3 module crash after ejecting sd card
Replies: 18
Views: 892

Re: CM3 module crash after ejecting sd card

I think you've found one of the reasons that mobile phones do not have externally accessible SD card storage, if they have it it is under the battery or inserted with the SIM card...

Gordon
by gsh
Tue Jun 05, 2018 12:49 pm
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 39
Views: 3394

Re: CM3 always crashes within minutes under load

Not yet, the factory has been on stop for a week... Just awaiting test logs...

Gordon
by gsh
Tue May 29, 2018 4:49 pm
Forum: Compute Module
Topic: Dynamic profile VCore difference between RPi3 & CM3
Replies: 28
Views: 1793

Re: Dynamic profile VCore difference between RPi3 & CM3

https://drive.google.com/file/d/1blhvltF1MuXBKm3V9vt4MiPkvV3Z-PVY/view?usp=sharing The above link is a presentation showing our analysis of Pi3B and CM3 doing the same thing. The CM3 cannot dissipate as much energy into the air because of the reduced area, the addition of a heatsink doesn't make a h...
by gsh
Mon May 28, 2018 6:04 pm
Forum: Compute Module
Topic: Dynamic profile VCore difference between RPi3 & CM3
Replies: 28
Views: 1793

Re: Dynamic profile VCore difference between RPi3 & CM3

Are you saying there is no difference in the time it takes to reach 80 degrees with or without the heatsink? That sounds like poor thermal conduction, in comparison to the conduction into the PCB the thermal conduction Page 13 of this is particularly interesting: Shows only 11% of the heat escapes t...
by gsh
Fri May 25, 2018 9:34 pm
Forum: Compute Module
Topic: Installing Image on CM3 twice failing
Replies: 13
Views: 797

Re: Installing Image on CM3 twice failing

I think we're going to need to get hold of your cm3 with the broken image so we can debug it. I cannot really even begin to hazard a guess at what the problem may be at the moment...

Email me at [email protected]

Gordon
by gsh
Fri May 25, 2018 2:28 pm
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 39
Views: 3394

Re: CM3 always crashes within minutes under load

Ah, right yes... No barcode!

I'll just get them to trace it through the serial number...

Gordon
by gsh
Fri May 25, 2018 1:39 pm
Forum: Compute Module
Topic: CM3 always crashes within minutes under load
Replies: 39
Views: 3394

Re: CM3 always crashes within minutes under load

Can you please take a photo of the 2D barcode on the device, it's clear that your devices are slightly slower than normal because you have some overvoltage bits set. But I just need to check what happened on the production line.

Thanks
Gordon

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