Re: [beagleboard] 625 MHz leak?

Gunter, We tried that and this did not work for us. The noise was still there. They said the noise was coming out with a clock signal. Any ideas? Should we check the crystals or something else? Any ideas? Regards, Shu On Saturday, January 31, 2015 at 12:23:15 PM UTC-6, dl4mea wrote: In a

Re: [beagleboard] 625 MHz leak?

Liyaoshi, We have the same problem. I agree with what you mentioned. We checked If the RJ45 cable is not plugged in, but still failed the Radiated emissions test. What else we should look into? the RJ45 connector has the integrated magnetic. Regards, Shu On Wednesday, May 14, 2014 at 9:52:10

Re: [beagleboard] 625 MHz leak?

Lee, Did you find out what cause the noise? We have the same problem right now. Our noise is from 300M to 600M. Regards, Shu On Wednesday, May 14, 2014 at 3:59:24 PM UTC-5, Lee Crocker wrote: It's not something unique to our board--a stock BBB has the same problem. On Wednesday, May 14,

Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

Mikkil, Thanks for you detailed answer. U15.1: _1OE = 0V U15.2: 1A= 0V U15.3: 2Y= floating (flickering +-0.000,50V) U15.4: GND = 0V U15.5: 2A = UART0_RX = 3.335V U15.6: 1Y = UART0_TX = 3.195V U15.7: 2OE = 3.352V

Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

Mikkel, You can give a 3.3v directly or use a small resistor to make the voltage on the 4th pin of J1 higher than 3V. That should work. We rebooted a board over hundreds of time by using an app on Linux. It did not fail a single time. We found this accidently by using serial cable and the

Re: [beagleboard] BBB won't boot up (PWR Led does a single quick blink)

Hi, There should be a short on board. The U2 shuts itself down to prevent the high current draw which is caused by the short. That is why the LED goes off after it blinks once. Regards, Shu On Monday, October 27, 2014 10:56:34 PM UTC-5, s...@kopi-d.com wrote: I am in the same situation.

Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

Mikkel, You don't have to remove the whole U15. You can just give a 3.3V pull-up to the 4th PIN on the J1 connector. Then the board will not be stuck at the UBOOT anymore. My question is how to fix it from software perspective? In u-Boot source, how can we make sure it is not stuck? If

Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

Andrew, I tried that already. The file ../include/config.h is automatically generated when recompiling. I added the two lines which I marked red below. After I recompiled the uboot source again, the new generated config.h file replaces the old one that i modified and does not have the two

Re: [beagleboard] How to change Device Tree Blob (.dtb) file since the kernel does not have capemgr to load overlays.

Robert, I do not know why I posted a reply with an image like 3 hours ago and it did not show up until now. Below are the logs I got by typing printenv. The board loads the fdtfile=am335x-boneblack.dtb. I used find -iname *.dts and I do not see any device tree source in the SD card. I will

Re: [beagleboard] How to change Device Tree Blob (.dtb) file since the kernel does not have capemgr to load overlays.

Robert, This is what i see from the printenv. It loads the fdtfile=am335x-boneblack.dtb device tree file. Can I create a new .dtb and replace the am335x-boneblack.dtb to load my new .dtb? Or how to create an uEnv.txt ? Regareds,

[beagleboard] How to change Device Tree Blob (.dtb) file since the kernel does not have capemgr to load overlays.

Hi, Our board uses arago project on it. The kernel is 3.12 and in the directory /sys/devices/, there is no capemgr.* . Therefore, I am not able to use the device tree overlays (.dtbo). We want to change the pinmux on the P8 and P9 header and also turn the internal pull up resistor of the

Re: [beagleboard] How to change Device Tree Blob (.dtb) file since the kernel does not have capemgr to load overlays.

Robert, Thanks for your reply. We do not have the bootloader source. We only use the bootloader image file. There are two partitions in the SD card. In the boot partition, there are only MLO and u-boot.img. In the rootfs partition, in the folder /boot/, there are .dtb files and zImage

[beagleboard] UART0(J1 connector) of BeagleboneBlack

We had a weird problem when running our Beaglebone black board with Linux. We boot the system every 5 minutes. The UART0 (J1 connector) of BBB is tied to the serial console of the system by default, and it prints out a lot of logs via serial cable if the cable is connected. The board runs

[beagleboard] UART0 crashes the Beaglebone black board

We had a weird problem when running our Beaglebone black board with Linux. We boot the system every 5 minutes. The UART 0 of BBB is tied to the serial console of the system by default, and it prints out a lot of logs via serial cable if the cable is connected. The board runs very well when

[beagleboard] How to flash the eMMC using JTAG and TI CCS

Hi, We are using BBB for our software development. We were able to use SD card to flash the eMMC of the BBB. I am not sure if there is a faster way, like using JTAG and CCS, to flash the eMMC? Thanks. -- For more options, visit http://beagleboard.org/discuss --- You received this message