Re: [beagleboard] Re: Beaglebone Sudoers File get Corrupted.

Thanks both. Looks like the shadow file was updated around the correct time last night. Moral of the story: don't update passwords at close to 1am. debian@beaglebone:/etc$ ls -l pass* shadow* -rw-r--r-- 1 root root 1611 Feb 7 23:56 passwd -rw--- 1 root root 1611 Feb 7 23:56 passwd- -r

[beagleboard] Using SPI GPIO Bitbang

Hi all, I'm using a Beaglebone black with Barebox bootloader and want to realize SPI with GPIO Bitbang. I already have the communication implemented in C, but I can't get the device tree file to work. In am33xx.dtsi a normal SPI looks like: spi0: spi@4803 { compatible = "ti,om

[beagleboard] SPI error: full duplex unsupported

Hi all, I'm using the Barebox bootloader on Beaglebone black and I have a script using the SPI interface (spi0: spi@4803) to communicate with a hardware chip. When executing the script I get the following output: SPI error: full duplex unsupported wolfTPM2_Init failed 0xffea: Unknow

[beagleboard] Re: Pin 8_44 boot interference

No. The boot pin sensing is fundamental to how the processor works. It can not boot without that function. The proper question to ask is how do I prevent my I-O from disturbing the boot process. The solution is probably something like adding transmission gates that does not connect your I-O unt

[beagleboard] Re: Pin 8_44 boot interference

The CPU requires that function to boot. The question you should be asking is how do you design your circuit, so that it does not interfere with the boot process. Probably would require something like a transmission gate that does not connect your circuit to the pin until the System_Reset line g

Re: [beagleboard] Compatibility BB blue vs Black + robotics cape

On Wed, Apr 10, 2019 at 7:07 AM wrote: > > Hi. Can I just take an sdcard from bb blue, put it into black + cape and > expect it to work? If not, what should I change? There is a special dtb you need to load for the black+cape combination, but yes same image will boot.. Regards, -- Robert Nels

[beagleboard] Pin 8_44 boot interference

Hi All... I use pin 8_44 for digital input to the PRU. For those new to this issue, that is one of several pins that can change the boot behavior of the BBB, but the bottom line is that it should not be connected on startup. I didn't know that when I started my project, but it wouldn't have

[beagleboard] Clock for SPI communication for BeagleBone PRU

Hi! I've been looking into assembly code and the memory mappings between the main processor and prus, and I'm wondering how i could read a clock/timer of custom frequency in the assembly code. I've been looking into the AM335X manual for information regarding the clocks, and found some useful i

[beagleboard] Compatibility BB blue vs Black + robotics cape

Hi. Can I just take an sdcard from bb blue, put it into black + cape and expect it to work? If not, what should I change? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe

[beagleboard] System clock for PRU, BeagleBone Black

Hi! I've been searching for information regarding SPI on the PRU. I'm starting to understand assembly programming and the memory mappings, but i'm unable to find information on system clocks. I've been through the AM335x-Manual where i found a lot of information on the mcSPI-module and its regi

Re: [beagleboard] Re: Beaglebone Sudoers File get Corrupted.

Yes, same concept. Once you have the system booted, set your password then copy the /etc/passwd file over to the other partition. I forget if the default BB image uses shadow password file so if there's no password data in the passwd file you might need to copy over the /etc/shadow file too. Make s

[beagleboard] Re: How to use timer interrupt from GPIO to control sampling period of ADC in BeagleBone Black by c++ co

Hi Peeranut. >From my own experience I suspect you will have to write a kernel module or use PRU to start ADC by timer. The only simple way I found to get stable sampling intervals on BBB is by using IIO linux kernel subsystem instead. There is some discussion here

[beagleboard] Re: Beaglebone Sudoers File get Corrupted.

Hi - do you think this process would work for recovering /etc/passwd when, despite typing it three times (change, confirm, into notes), my new debian user password isn't accepted. Single user mode on BBB seems non-trivial and I'd rather not start again with my config. Thanks, Dan On Tuesd

[beagleboard] Re: Maximum number of connected beaglebones per single beaglebone

Hello, TI's chipset on the BBBW has constraint of 10-nodes for track. But I think this is not a problem for a network consists of 32-nodes or higher. Right? Just, one node can not track the 11-nodes, but it can track 10-nodes at most. Thank you. On Sunday, April 7, 2019 at 7:33:19 PM UTC+3