Re: [beagleboard] Can't Flash BBB
you cannot use the USB power while flashing you need a 2 amp power supply i posted a few days ago a mail that tells you the links for the correct ones On 6/7/2015 5:43 AM, clickco...@gmail.com wrote: New to the world of BBB and bought one and am stuck at flashing the eMMC on the BBB. I followed the instructions on the BBB website, but the thing just won't flash - I'm sure it's something I'm not doing right, but it seems dozens/hundreds/thousands of similar folks have the same exact problem. Here is what I did as per the manufacturer's instructions: (http://beagleboard.org/getting-started) 1) Connected the BBB to PC running Windows 8.1 with mini-USB cable 2) Installed 64-bit Windows drivers - restarted Windows and resumed this process 3) Used Windows Chrome to browse to BBB at http://192.168.7.2 - everything looked fine 4) Updated BBB to latest software: a) downloaded latest BBB image at: http://beagleboard.org/latest-images b) downloaded and installed 7Zip and unzipped the .img.xz file to just a .img file c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date d) unplugged BBB and inserted the SD e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise. If I connect the Mini USB I can see the SD card directory, with all files having today's date, which means BBB booted from the card but when I remove the SD card and reset BBB I see the original 2013 files that were never flashed on the eMMC So what the heck am I doing wrong? Thanks for any help.this really should not be this hard for hundreds/thousands of users having the same exact problem -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com mailto:beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Debian 8 (Console 5-31) Bug report (does not respond to serial port input after boot.
BBB-eMMC-flasher-debian-8.0-console-armhf-2015-05-31-2gb.img does the same thing. == On Sunday, June 7, 2015 at 2:59:01 PM UTC-5, Graham wrote: REGARDING: bone-debian-8.0-console-armhf-2015-05-31-2gb.img BUG: Does not respond to inputs on serial port tty0 after boot. Note: bone-debian-8.0-lxqt-4gb-armhf-2015-05-31-4gb.img does not have this problem. bone-debian-8.0-console-armhf-2015-05-17-2gb.img does not have this problem. serial port tty0 boot log (partial): [ OK ] Started System Logging Service. [ OK ] Started Login Service. Starting Getty on tty1... [ OK ] Started Getty on tty1. Starting Serial Getty on ttyS0... [ OK ] Started Serial Getty on ttyS0. [ 17.050606] musb-hdrc musb-hdrc.0.auto: otg: usb_otg_register_gadget: device not registered to otg core [ OK ] Found device /dev/ttyGS0. Starting Serial Getty on ttyGS0... [ OK ] Started Serial Getty on ttyGS0. [ OK ] Reached target Login Prompts. [ OK ] Started Generic Board Startup. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 8 beaglebone ttyS0 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] The IP Address for eth0 is: 192.168.1.200 beaglebone login: At this point, the unit does not respond to any input on the tty0 serial port. However I can SSH into the unit just fine ... == login as: root Debian GNU/Linux 8 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] Last login: Sun Jun 7 19:18:12 2015 from dt7100-pc root@beaglebone:~# uname -a Linux beaglebone 3.14.43-ti-r66 #1 SMP PREEMPT Fri May 22 22:31:38 UTC 2015 armv7l GNU/Linux root@beaglebone:~# = -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Can't Flash BBB
*a) downloaded latest BBB image at: http://beagleboard.org/latest-images http://beagleboard.org/latest-images* Which image ? The main link is for a 4GB sdcard image only. The smaller print link under that links to the elinux page which in turn has links for many different images including flasher images. *c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date* *d) unplugged BBB and inserted the SD* *e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up* *f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise.* It sounds as though you have the wrong image for flashing. As mentioned above. One thing to note however is that running from eMMC versus sdcard wont be much of a performance difference. So, running from sdcard is not necessarily a bad thing. Gives you an opportunity to test an image before committing it to eMMC. On Sun, Jun 7, 2015 at 11:54 AM, evilwulfie evilwul...@gmail.com wrote: you cannot use the USB power while flashing you need a 2 amp power supply i posted a few days ago a mail that tells you the links for the correct ones On 6/7/2015 5:43 AM, clickco...@gmail.com wrote: New to the world of BBB and bought one and am stuck at flashing the eMMC on the BBB. I followed the instructions on the BBB website, but the thing just won't flash - I'm sure it's something I'm not doing right, but it seems dozens/hundreds/thousands of similar folks have the same exact problem. Here is what I did as per the manufacturer's instructions: ( http://beagleboard.org/getting-started) 1) Connected the BBB to PC running Windows 8.1 with mini-USB cable 2) Installed 64-bit Windows drivers - restarted Windows and resumed this process 3) Used Windows Chrome to browse to BBB at http://192.168.7.2 - everything looked fine 4) Updated BBB to latest software: a) downloaded latest BBB image at: http://beagleboard.org/latest-images b) downloaded and installed 7Zip and unzipped the .img.xz file to just a .img file c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date d) unplugged BBB and inserted the SD e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise. If I connect the Mini USB I can see the SD card directory, with all files having today's date, which means BBB booted from the card but when I remove the SD card and reset BBB I see the original 2013 files that were never flashed on the eMMC So what the heck am I doing wrong? Thanks for any help.this really should not be this hard for hundreds/thousands of users having the same exact problem -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Debian 8 (Console 5-31) Bug report (does not respond to serial port input after boot.
REGARDING: bone-debian-8.0-console-armhf-2015-05-31-2gb.img BUG: Does not respond to inputs on serial port tty0 after boot. Note: bone-debian-8.0-lxqt-4gb-armhf-2015-05-31-4gb.img does not have this problem. bone-debian-8.0-console-armhf-2015-05-17-2gb.img does not have this problem. serial port tty0 boot log (partial): [ OK ] Started System Logging Service. [ OK ] Started Login Service. Starting Getty on tty1... [ OK ] Started Getty on tty1. Starting Serial Getty on ttyS0... [ OK ] Started Serial Getty on ttyS0. [ 17.050606] musb-hdrc musb-hdrc.0.auto: otg: usb_otg_register_gadget: device not registered to otg core [ OK ] Found device /dev/ttyGS0. Starting Serial Getty on ttyGS0... [ OK ] Started Serial Getty on ttyGS0. [ OK ] Reached target Login Prompts. [ OK ] Started Generic Board Startup. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 8 beaglebone ttyS0 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] The IP Address for eth0 is: 192.168.1.200 beaglebone login: At this point, the unit does not respond to any input on the tty0 serial port. However I can SSH into the unit just fine ... == login as: root Debian GNU/Linux 8 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] Last login: Sun Jun 7 19:18:12 2015 from dt7100-pc root@beaglebone:~# uname -a Linux beaglebone 3.14.43-ti-r66 #1 SMP PREEMPT Fri May 22 22:31:38 UTC 2015 armv7l GNU/Linux root@beaglebone:~# = -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: How to enable all i2c
My experience is that the echo only works if you are logged on as root. it never worked with sudo for me. I found uEnv.txt at /boot/uEnv.txt For fear of opening a can of worms, the numbering of the three I2C buses is, for lack of a better term, illogical. From the aspect of an engineer, programmer or human -- especially someone new to BB and/or to embedded systems. debian@beaglebone:/$ ls /sys/class/i2c-dev/ -l total 0 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-0 - ../../devices/ocp.3/44e0b000.i2c/i2c-0/i2c-dev/i2c-0 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-1 - ../../devices/ocp.3/4819c000.i2c/i2c-1/i2c-dev/i2c-1 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-2 - ../../devices/ocp.3/4802a000.i2c/i2c-2/i2c-dev/i2c-2 so: i2c-0 is hardware bus 0 i2c-1 is hardware bus 2 i2c-2 is hardware bus 1 Both having to find and edit uEnv.txt and then having to deal with the mixed up numbering just doesn't make any sense to me... There you have it, my bias. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] BBB not Flashing the eMMC
New to the world of BBB and bought one and am stuck at flashing the eMMC on the BBB. I followed the instructions on the BBB website, but the thing just won't flash - I'm sure it's something I'm not doing right, but it seems dozens/hundreds/thousands of similar folks have the same exact problem. Here is what I did as per the manufacturer's instructions: (http://beagleboard.org/getting-started) 1) Connected the BBB to PC running Windows 8.1 with mini-USB cable 2) Installed 64-bit Windows drivers - restarted Windows and resumed this process 3) Used Windows Chrome to browse to BBB at http://192.168.7.2 - everything looked fine 4) Updated BBB to latest software: a) downloaded latest BBB image at: http://beagleboard.org/latest-images b) downloaded and installed 7Zip and unzipped the .img.xz file to just a .img file c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date d) unplugged BBB and inserted the SD e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise. If I connect the Mini USB I can see the SD card directory, with all files having today's date, which means BBB booted from the card but when I remove the SD card and reset BBB I see the original 2013 files that were never flashed on the eMMC I'm missing the step where the booted SD flashes it's image to the eMMC and I can't find documentation that helps. I guess I could delete the eMMC and copy over an image of the SD but I doubt that would work. So what the heck am I doing wrong? Thanks for any help.this really should not be this hard for hundreds/thousands of users having the same exact problem -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Can't Flash BBB
New to the world of BBB and bought one and am stuck at flashing the eMMC on the BBB. I followed the instructions on the BBB website, but the thing just won't flash - I'm sure it's something I'm not doing right, but it seems dozens/hundreds/thousands of similar folks have the same exact problem. Here is what I did as per the manufacturer's instructions: (http://beagleboard.org/getting-started) 1) Connected the BBB to PC running Windows 8.1 with mini-USB cable 2) Installed 64-bit Windows drivers - restarted Windows and resumed this process 3) Used Windows Chrome to browse to BBB at http://192.168.7.2 - everything looked fine 4) Updated BBB to latest software: a) downloaded latest BBB image at: http://beagleboard.org/latest-images b) downloaded and installed 7Zip and unzipped the .img.xz file to just a .img file c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date d) unplugged BBB and inserted the SD e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise. If I connect the Mini USB I can see the SD card directory, with all files having today's date, which means BBB booted from the card but when I remove the SD card and reset BBB I see the original 2013 files that were never flashed on the eMMC So what the heck am I doing wrong? Thanks for any help.this really should not be this hard for hundreds/thousands of users having the same exact problem -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Disable Autoshutdown on Power Outage
Hello everyone, I have connected a 3,7V cell Battery to the Beaglebone Black. The problem is that every time I unplug the main 5V power supply from the board, the board is going into a safe shutdown mode (since the battery still supplies the board with power). Is there a way to disable this auto shutdown pattern? Kind regards, Michael -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Problems with CAN in BBB
Hey Bruno, regarding your Step 3) Try ip link set can0 up type can bitrate 125000 listen-only off. After this Step send some CAN Messages to the Controller and enter ifconfig in the console window. Please tell me, if you can see the can0 device. Did the device read any messages (RX entry) Kind regards, Michael Am Montag, 1. Juni 2015 21:00:50 UTC+2 schrieb Bruno Luiz: I am working with a BeagleBone Black rev C for a project using CAN. I am using the CBB-Serial-r02 cape because we need the UART features too. The problem is that CAN is not working. I did a lot of things to test it on a 3.8-rt kernel from RobertCNelson (which is only PREEMPT), but it didn't worked at all. Some things that I did: 0) Installed the latest Debian Image 1) Always modprobe the can modules (can, can-dev, can-raw) 2) Compiled and installed canutils, always using the cangen can0 to test the can output 3) Always run ip link set can0 up type can bitrate 125000; ifconfig can0 up to activate can0 4) Installed the CBB-Serial-r02 dtbs from the official repository, even that the debian image that I used already includes it 5) Test the output with an osciloscope. I did the same test with an EzDSP 28335 and it worked, so it is not a problem with this part of the method 6) I tried to do a candump can0 with the DSP generating random data, but the candump didn't show any data I recompiled 3.14 kernel using the dtb-rebuilder (instructions on this tutorial: https://groups.google.com/d/msg/beagleboard/_9u1B6ZkgCU/K2ARgwfC490J) and enabling the DCAN1 (because DCAN0 disables the I2C used for capemgr) and it didn't worked too. Well, I ran out of options here. Some one is having problems with the rev C and CAN too or that is some problem with my method? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: How to enable I2C P9_24 P926 (BBB RevC)?
Hi Robert, did you ever get this to work? If so, would you mind sharing the trick? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] BBB not Flashing the eMMC
I just went through this same thing a couple days ago. From what I can tell (and others, please correct me if I'm wrong), there are two different types of images. One just runs off the SD card (which I am guessing is what you are using); the other is configured to actually flash the image onto the eMMC. I'd been trying the non-flasher image, and was seeing the same thing you are. What I did was to go to http://elinux.org/Beagleboard:BeagleBoneBlack_Debian and about 2/3 of the way down the page is a Debian flasher image under the title of BBB Rev C (4GB eMMC) 4GB eMMC Flasher with an acual file name of: BBB-eMMC-flasher-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz Once I downloaded that image, unzipped it, and installed it on my SD card, the flash instructions worked marvelously to flash the image onto the eMMC of my BBB rev C. Hope this helps! Scott On Sun, Jun 7, 2015 at 10:03 AM, clickco...@gmail.com wrote: New to the world of BBB and bought one and am stuck at flashing the eMMC on the BBB. I followed the instructions on the BBB website, but the thing just won't flash - I'm sure it's something I'm not doing right, but it seems dozens/hundreds/thousands of similar folks have the same exact problem. Here is what I did as per the manufacturer's instructions: ( http://beagleboard.org/getting-started) 1) Connected the BBB to PC running Windows 8.1 with mini-USB cable 2) Installed 64-bit Windows drivers - restarted Windows and resumed this process 3) Used Windows Chrome to browse to BBB at http://192.168.7.2 - everything looked fine 4) Updated BBB to latest software: a) downloaded latest BBB image at: http://beagleboard.org/latest-images b) downloaded and installed 7Zip and unzipped the .img.xz file to just a .img file c) downloaded and installed the Image Writer for Windows and it built the 16 GB SD micro flash - I looked at the directory and it seems just fine with all the files having today's date d) unplugged BBB and inserted the SD e) Pressed and held the Reset button on the BBB while inserting the 5V 2A power cord - held button down 5 seconds and all 4 LEDs lit up f) LEDs flashing for about 1 minute then just LED 0 flashing the heartbeat for the next 5 hours - no 4 lit LEDs as the instructions promise. If I connect the Mini USB I can see the SD card directory, with all files having today's date, which means BBB booted from the card but when I remove the SD card and reset BBB I see the original 2013 files that were never flashed on the eMMC I'm missing the step where the booted SD flashes it's image to the eMMC and I can't find documentation that helps. I guess I could delete the eMMC and copy over an image of the SD but I doubt that would work. So what the heck am I doing wrong? Thanks for any help.this really should not be this hard for hundreds/thousands of users having the same exact problem -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: How to enable all i2c
My experience is that the echo only works if you are logged on as root. it never worked with sudo for me. I found uEnv.txt at /boot/uEnv.txt For fear of opening a can of worms, the numbering of the three I2C buses is, for lack of a better term, illogical. From the aspect of an engineer, programmer or human -- especially someone new to BB and/or to embedded systems. http://beaglebone.cameon.net/home/i2c-devices debian@beaglebone:/$ ls /sys/class/i2c-dev/ -ltotal 0 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-0 - ../../devices/ocp.3/44e0b000.i2c/i2c-0/i2c-dev/i2c-0 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-1 - ../../devices/ocp.3/4819c000.i2c/i2c-1/i2c-dev/i2c-1 lrwxrwxrwx 1 root root 0 Mar 3 19:03 i2c-2 - ../../devices/ocp.3/4802a000.i2c/i2c-2/i2c-dev/i2c-2 so: i2c-0 is hardware bus 0 i2c-1 is hardware bus 2 i2c-2 is hardware bus 1 Both having to find and edit uEnv.txt and then having to deal with the mixed up numbering just doesn't make any sense to me... There you have it, my bias. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Sun, Jun 7, 2015 at 9:37 PM, Robert Nelson robertcnel...@gmail.com wrote: https://github.com/RobertCNelson/bb-kernel/tree/am33x-v4.1 thanks, cloning it now and will do a build. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Sun, Jun 7, 2015 at 9:37 PM, Robert Nelson robertcnel...@gmail.com wrote: https://github.com/RobertCNelson/bb-kernel/tree/am33x-v4.1 thanks, boots and loads the SPI1 cape: root@beaglebone:~# uname -a Linux beaglebone 4.1.0-rc6-bone6.6-00066-g75ea467 #1 Sun Jun 7 23:18:32 CDT 2015 armv7l GNU/Linux root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 4: ff:P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-SPIDEV1 root@beaglebone:~# ls -la /dev/spidev1.* crw-rw---T 1 root spi 153, 1 Mar 1 20:46 /dev/spidev1.0 crw-rw---T 1 root spi 153, 0 Mar 1 20:46 /dev/spidev1.1 I'm still trying to work out how to use fbtft in 4.1. this is where I've gotten so far: root@beaglebone:~# modprobe fbtft_device name=adafruit22 [ 1310.480992] fbtft: module is from the staging directory, the quality is unknown, you have been warned. [ 1310.494031] fbtft_device: module is from the staging directory, the quality is unknown, you have been warned. [ 1310.499966] fbtft_device: SPI devices registered: [ 1310.500017] fbtft_device: spidev spi1.1 16000kHz 8 bits mode=0x00 [ 1310.500044] fbtft_device: spidev spi1.0 16000kHz 8 bits mode=0x01 [ 1310.500061] fbtft_device: 'fb' Platform devices registered: [ 1310.500215] fbtft_device: spi_busnum_to_master(0) returned NULL [ 1310.506730] fbtft_device: failed to register SPI device thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
That's interesting. Unfortunately, while my primary app is a C program I wrote, I also (currently) rely on node.js to provide a configuration server. This server does NOT have to be up and running immediately. However, an upcoming enhancement to my app will have it fetching data from the network (it currently stores it all locally), so WiFi has to connect as quickly as possible. Seems like I'd have to write years of additional code if I have no Linux... On Jun 7, 2015, at 20:55 , William Hermans yyrk...@gmail.com wrote: Rick, If we're talking uboot- executable, no Linux, you can probably do the same. One of the beagleboard.org google group community liyoshi I think had a Qt app booting in under 5 seconds too I think. It's been a while since I've seen that post, and do not remember what topic is was under . . . I'll check that video in a bit though. On Sun, Jun 7, 2015 at 8:47 PM, Rick Mann rm...@latencyzero.com wrote: On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Sun, Jun 7, 2015 at 9:13 PM, William Hermans yyrk...@gmail.com wrote: CONFIG_BONE_CAPEMGR=y thanks, good point! -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
And as Robert Nelson points out towards the end of that post. there is also Falcon mode for uboot. Pretty much skips most of uboot, and goes straight into loading the kernel. How much time that will actually save ? dunno . . . On Sun, Jun 7, 2015 at 9:51 PM, William Hermans yyrk...@gmail.com wrote: https://groups.google.com/forum/#!searchin/beagleboard/Qt$20boot/beagleboard/iOOM7utU1Nw/L67y8Qi7r9wJ The video I was thinking of was actually an imx6 board. But liyaoshi says that 1 s boot times should be achievable. Scroll down to liyaoshi's posts an see what he / she recommends for faster boots. On Sun, Jun 7, 2015 at 9:46 PM, Rick Mann rm...@latencyzero.com wrote: That's interesting. Unfortunately, while my primary app is a C program I wrote, I also (currently) rely on node.js to provide a configuration server. This server does NOT have to be up and running immediately. However, an upcoming enhancement to my app will have it fetching data from the network (it currently stores it all locally), so WiFi has to connect as quickly as possible. Seems like I'd have to write years of additional code if I have no Linux... On Jun 7, 2015, at 20:55 , William Hermans yyrk...@gmail.com wrote: Rick, If we're talking uboot- executable, no Linux, you can probably do the same. One of the beagleboard.org google group community liyoshi I think had a Qt app booting in under 5 seconds too I think. It's been a while since I've seen that post, and do not remember what topic is was under . . . I'll check that video in a bit though. On Sun, Jun 7, 2015 at 8:47 PM, Rick Mann rm...@latencyzero.com wrote: On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
https://groups.google.com/forum/#!searchin/beagleboard/Qt$20boot/beagleboard/iOOM7utU1Nw/L67y8Qi7r9wJ The video I was thinking of was actually an imx6 board. But liyaoshi says that 1 s boot times should be achievable. Scroll down to liyaoshi's posts an see what he / she recommends for faster boots. On Sun, Jun 7, 2015 at 9:46 PM, Rick Mann rm...@latencyzero.com wrote: That's interesting. Unfortunately, while my primary app is a C program I wrote, I also (currently) rely on node.js to provide a configuration server. This server does NOT have to be up and running immediately. However, an upcoming enhancement to my app will have it fetching data from the network (it currently stores it all locally), so WiFi has to connect as quickly as possible. Seems like I'd have to write years of additional code if I have no Linux... On Jun 7, 2015, at 20:55 , William Hermans yyrk...@gmail.com wrote: Rick, If we're talking uboot- executable, no Linux, you can probably do the same. One of the beagleboard.org google group community liyoshi I think had a Qt app booting in under 5 seconds too I think. It's been a while since I've seen that post, and do not remember what topic is was under . . . I'll check that video in a bit though. On Sun, Jun 7, 2015 at 8:47 PM, Rick Mann rm...@latencyzero.com wrote: On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
Awesome, thanks for the links! On Jun 7, 2015, at 21:58 , William Hermans yyrk...@gmail.com wrote: And as Robert Nelson points out towards the end of that post. there is also Falcon mode for uboot. Pretty much skips most of uboot, and goes straight into loading the kernel. How much time that will actually save ? dunno . . . On Sun, Jun 7, 2015 at 9:51 PM, William Hermans yyrk...@gmail.com wrote: https://groups.google.com/forum/#!searchin/beagleboard/Qt$20boot/beagleboard/iOOM7utU1Nw/L67y8Qi7r9wJ The video I was thinking of was actually an imx6 board. But liyaoshi says that 1 s boot times should be achievable. Scroll down to liyaoshi's posts an see what he / she recommends for faster boots. On Sun, Jun 7, 2015 at 9:46 PM, Rick Mann rm...@latencyzero.com wrote: That's interesting. Unfortunately, while my primary app is a C program I wrote, I also (currently) rely on node.js to provide a configuration server. This server does NOT have to be up and running immediately. However, an upcoming enhancement to my app will have it fetching data from the network (it currently stores it all locally), so WiFi has to connect as quickly as possible. Seems like I'd have to write years of additional code if I have no Linux... On Jun 7, 2015, at 20:55 , William Hermans yyrk...@gmail.com wrote: Rick, If we're talking uboot- executable, no Linux, you can probably do the same. One of the beagleboard.org google group community liyoshi I think had a Qt app booting in under 5 seconds too I think. It's been a while since I've seen that post, and do not remember what topic is was under . . . I'll check that video in a bit though. On Sun, Jun 7, 2015 at 8:47 PM, Rick Mann rm...@latencyzero.com wrote: On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
Thanks, William. Yeah, it could be from hibernate, but I don't think so: https://www.youtube.com/watch?v=4Fjfqz6FxC8 And it looks like it's 3 seconds power-to-app. I can probably live with that. On Jun 7, 2015, at 15:38 , William Hermans yyrk...@gmail.com wrote: I would think hard coding into the main DTB would add time. A couple ways to think about it would be you *could* theoretically in userspace after the board has booted. Then systemd is supposed to be better at parallel tasks when booting compared to SYSV. Which again *could* mean that keeping things seperate could lead to faster boot times. With all that said. You could test it yourself. There is a systemd command that allows you to see how long things take to load during boot. https://wiki.archlinux.org/index.php/Improve_boot_performance Also I find it difficult in believing that the rPI can boot any faster than a BBB. That 1 second boot time was probably hibernate . . . suspend ram to disk, or whatever it is called on Linux. On Sun, Jun 7, 2015 at 2:48 PM, Rick Mann rm...@latencyzero.com wrote: I'm working on reducing the boot time (power on to my C user code running) as much as possible. I've seen demonstrations of an RPi booting in under 1 second. Does anyone have any idea how much overhead is introduced by the DTB processing? If I were to remove the DTB support in a custom kernel, and hard-code all the necessary peripherals, how much time could I theoretically shave off the boot? It's probably not worth all that effort, but if DTB processing adds two seconds to the boot, it's worth considering. If the overhead is negligible compared to doing it without, that's valuable information, too. Thanks, -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
Rick, If we're talking uboot- executable, no Linux, you can probably do the same. One of the beagleboard.org google group community liyoshi I think had a Qt app booting in under 5 seconds too I think. It's been a while since I've seen that post, and do not remember what topic is was under . . . I'll check that video in a bit though. On Sun, Jun 7, 2015 at 8:47 PM, Rick Mann rm...@latencyzero.com wrote: On Jun 7, 2015, at 16:54 , rh_ richard_hubb...@lavabit.com wrote: Wouldn't you want to know how much time it takes before deciding to reduce the time it takes. Hence my question. How long is your power on to my C user code running? Forever. This is an embedded device that I'd like to be operational from power-on (it's not necessarily always powered). I don't want to make the user wait. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
*root@beaglebone:/# cat /boot/uEnv.txt |egrep -v '^(#|$)'* * uname_r=4.1.0-rc6-bone6* * cmdline=quiet init=/lib/systemd/systemd* * bone_capemgr.enable_partno=BB-**SPIDEV0* * cape_disable=capemgr.disable_**partno=BB-BONELT-HDMI,BB-* *BONELT-HDMIN,BB-BONE-EMMC-2G* *cape_enable=bone_capemgr.enable_partno=BB-**SPIDEV0* On Sun, Jun 7, 2015 at 2:32 PM, Drew Fustini pdp7p...@gmail.com wrote: On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: Do you want to test the 4.1 spi overlays?? ;) thanks, that did work for me. although the uEnv.txt settings seemed to have no effect. I had to echo the cape name into slots: root@beaglebone:/# uname -a Linux beaglebone 4.1.0-rc6-bone6 #1 Mon Jun 1 22:44:52 UTC 2015 armv7l GNU/Linux root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 root@beaglebone:/# cat /boot/uEnv.txt |egrep -v '^(#|$)' uname_r=4.1.0-rc6-bone6 cmdline=quiet init=/lib/systemd/systemd bone_capemgr.enable_partno=BB-SPIDEV0 cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G root@beaglebone:/# echo 'BB-SPIDEV0' /sys/devices/platform/bone_capemgr/slots root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 4: ff:P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-SPIDEV0 root@beaglebone:/# ls -la /dev/spi* crw-rw---T 1 root spi 153, 1 Jun 7 21:03 /dev/spidev1.0 crw-rw---T 1 root spi 153, 0 Jun 7 21:03 /dev/spidev1.1 Here is additional output: https://gist.github.com/pdp7/14a813bd3254254b94fe thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Debian 8 (Console 5-31) Bug report (does not respond to serial port input after boot.
tty0 should be ttyS0 now I believe. Where this is changed with images using systemd I am not sure, but with SYSV this was changed in /etc/inittab. On Sun, Jun 7, 2015 at 1:10 PM, Graham gra...@flex-radio.com wrote: BBB-eMMC-flasher-debian-8.0-console-armhf-2015-05-31-2gb.img does the same thing. == On Sunday, June 7, 2015 at 2:59:01 PM UTC-5, Graham wrote: REGARDING: bone-debian-8.0-console-armhf-2015-05-31-2gb.img BUG: Does not respond to inputs on serial port tty0 after boot. Note: bone-debian-8.0-lxqt-4gb-armhf-2015-05-31-4gb.img does not have this problem. bone-debian-8.0-console-armhf-2015-05-17-2gb.img does not have this problem. serial port tty0 boot log (partial): [ OK ] Started System Logging Service. [ OK ] Started Login Service. Starting Getty on tty1... [ OK ] Started Getty on tty1. Starting Serial Getty on ttyS0... [ OK ] Started Serial Getty on ttyS0. [ 17.050606] musb-hdrc musb-hdrc.0.auto: otg: usb_otg_register_gadget: device not registered to otg core [ OK ] Found device /dev/ttyGS0. Starting Serial Getty on ttyGS0... [ OK ] Started Serial Getty on ttyGS0. [ OK ] Reached target Login Prompts. [ OK ] Started Generic Board Startup. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 8 beaglebone ttyS0 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] The IP Address for eth0 is: 192.168.1.200 beaglebone login: At this point, the unit does not respond to any input on the tty0 serial port. However I can SSH into the unit just fine ... == login as: root Debian GNU/Linux 8 BeagleBoard.org Debian Image 2015-05-31 Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian default username:password is [debian:temppwd] Last login: Sun Jun 7 19:18:12 2015 from dt7100-pc root@beaglebone:~# uname -a Linux beaglebone 3.14.43-ti-r66 #1 SMP PREEMPT Fri May 22 22:31:38 UTC 2015 armv7l GNU/Linux root@beaglebone:~# = -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
I'm working on reducing the boot time (power on to my C user code running) as much as possible. I've seen demonstrations of an RPi booting in under 1 second. Does anyone have any idea how much overhead is introduced by the DTB processing? If I were to remove the DTB support in a custom kernel, and hard-code all the necessary peripherals, how much time could I theoretically shave off the boot? It's probably not worth all that effort, but if DTB processing adds two seconds to the boot, it's worth considering. If the overhead is negligible compared to doing it without, that's valuable information, too. Thanks, -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: Do you want to test the 4.1 spi overlays?? ;) thanks, that did work for me. although the uEnv.txt settings seemed to have no effect. I had to echo the cape name into slots: root@beaglebone:/# uname -a Linux beaglebone 4.1.0-rc6-bone6 #1 Mon Jun 1 22:44:52 UTC 2015 armv7l GNU/Linux root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 root@beaglebone:/# cat /boot/uEnv.txt |egrep -v '^(#|$)' uname_r=4.1.0-rc6-bone6 cmdline=quiet init=/lib/systemd/systemd bone_capemgr.enable_partno=BB-SPIDEV0 cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G root@beaglebone:/# echo 'BB-SPIDEV0' /sys/devices/platform/bone_capemgr/slots root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 4: ff:P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-SPIDEV0 root@beaglebone:/# ls -la /dev/spi* crw-rw---T 1 root spi 153, 1 Jun 7 21:03 /dev/spidev1.0 crw-rw---T 1 root spi 153, 0 Jun 7 21:03 /dev/spidev1.1 Here is additional output: https://gist.github.com/pdp7/14a813bd3254254b94fe thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] DragonBoard 410c
This was probably mentioned already, but I just remembered it. I saw this at MakerFaire: http://www.arrow.com/campaigns-na/qualcomm/dragonboard-410c/ 64-bit quad-core ARM 1 GB RAM, 8GB eMMC Wi-Fi, BT 4.1, GPS 2+1 USB µSD HDMI While overkill for my particular project (I certainly don't need 4 cores or 1 GB RAM), it has Wi-Fi, 8GB eMMC, and audio out, which are exactly what I need. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: sudo apt-get install linux-image-4.1.0-rc6-bone6 I want to compile modules in drivers/staging/fbtft. How can I get the source for 4.1.0-rc6-bone6? I don't see a tag for it in: https://github.com/RobertCNelson/linux-dev I did compile the capemgr branch: 4.1.0-rc6-capemgr-r13-00154-g37ef164 But it doesn't seem the capemgr exists when booting that kernel: # cat /sys/devices/platform/bone_capemgr/slots cat: /sys/devices/platform/bone_capemgr/slots: No such file or directory thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Speed of DTB processing vs hard-coded (on BBB)?
I would think hard coding into the main DTB would add time. A couple ways to think about it would be you *could* theoretically in userspace after the board has booted. Then systemd is supposed to be better at parallel tasks when booting compared to SYSV. Which again *could* mean that keeping things seperate could lead to faster boot times. With all that said. You could test it yourself. There is a systemd command that allows you to see how long things take to load during boot. https://wiki.archlinux.org/index.php/Improve_boot_performance Also I find it difficult in believing that the rPI can boot any faster than a BBB. That 1 second boot time was probably hibernate . . . suspend ram to disk, or whatever it is called on Linux. On Sun, Jun 7, 2015 at 2:48 PM, Rick Mann rm...@latencyzero.com wrote: I'm working on reducing the boot time (power on to my C user code running) as much as possible. I've seen demonstrations of an RPi booting in under 1 second. Does anyone have any idea how much overhead is introduced by the DTB processing? If I were to remove the DTB support in a custom kernel, and hard-code all the necessary peripherals, how much time could I theoretically shave off the boot? It's probably not worth all that effort, but if DTB processing adds two seconds to the boot, it's worth considering. If the overhead is negligible compared to doing it without, that's valuable information, too. Thanks, -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
cape_enable is a variable that places the following text into the Linux boot time parameters. If you ... debian@beaglebone:~$ *cat /proc/cmdline* console=tty0 console=ttyO0,115200n8 beaglebone-capemgr.enable_partno=BB-CAN1 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait fixrtc You most likely will see that your uEnv.txt modification did not stick. On Sun, Jun 7, 2015 at 3:46 PM, William Hermans yyrk...@gmail.com wrote: *root@beaglebone:/# cat /boot/uEnv.txt |egrep -v '^(#|$)'* * uname_r=4.1.0-rc6-bone6* * cmdline=quiet init=/lib/systemd/systemd* * bone_capemgr.enable_partno=BB-**SPIDEV0* * cape_disable=capemgr.disable_**partno=BB-BONELT-HDMI,BB-* *BONELT-HDMIN,BB-BONE-EMMC-2G* *cape_enable=bone_capemgr.enable_partno=BB-**SPIDEV0* On Sun, Jun 7, 2015 at 2:32 PM, Drew Fustini pdp7p...@gmail.com wrote: On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: Do you want to test the 4.1 spi overlays?? ;) thanks, that did work for me. although the uEnv.txt settings seemed to have no effect. I had to echo the cape name into slots: root@beaglebone:/# uname -a Linux beaglebone 4.1.0-rc6-bone6 #1 Mon Jun 1 22:44:52 UTC 2015 armv7l GNU/Linux root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 root@beaglebone:/# cat /boot/uEnv.txt |egrep -v '^(#|$)' uname_r=4.1.0-rc6-bone6 cmdline=quiet init=/lib/systemd/systemd bone_capemgr.enable_partno=BB-SPIDEV0 cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G root@beaglebone:/# echo 'BB-SPIDEV0' /sys/devices/platform/bone_capemgr/slots root@beaglebone:/# cat /sys/devices/platform/bone_capemgr/slots 0: 54:PF -1 1: 55:PF -1 2: 56:PF -1 3: 57:PF -1 4: ff:P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-SPIDEV0 root@beaglebone:/# ls -la /dev/spi* crw-rw---T 1 root spi 153, 1 Jun 7 21:03 /dev/spidev1.0 crw-rw---T 1 root spi 153, 0 Jun 7 21:03 /dev/spidev1.1 Here is additional output: https://gist.github.com/pdp7/14a813bd3254254b94fe thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Sun, Jun 7, 2015 at 5:46 PM, William Hermans yyrk...@gmail.com wrote: cape_enable=bone_capemgr.enable_partno=BB-SPIDEV0 thanks! -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
I do not think you can build *bone6 per se. Unless Robert gives you exact steps, but there is this. https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-LinuxKernel Which if I'm not mistaken Roberts scripts should pull in all the latest patches. Perhaps you can dissect the scripts and figure out whats going on. Or wait until tomorrow for Robert to reply. On Sun, Jun 7, 2015 at 6:46 PM, Drew Fustini pdp7p...@gmail.com wrote: On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: sudo apt-get install linux-image-4.1.0-rc6-bone6 I want to compile modules in drivers/staging/fbtft. How can I get the source for 4.1.0-rc6-bone6? I don't see a tag for it in: https://github.com/RobertCNelson/linux-dev I did compile the capemgr branch: 4.1.0-rc6-capemgr-r13-00154-g37ef164 But it doesn't seem the capemgr exists when booting that kernel: # cat /sys/devices/platform/bone_capemgr/slots cat: /sys/devices/platform/bone_capemgr/slots: No such file or directory thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
Drew, Oh hey did you check this out ? https://github.com/beagleboard/bb.org-overlays/blob/master/readme.md Specifically Kernel with CONFIG_BONE_CAPEMGR support: zcat /proc/config.gz | grep CONFIG_BONE_CAPEMGR CONFIG_BONE_CAPEMGR=y On Sun, Jun 7, 2015 at 7:01 PM, William Hermans yyrk...@gmail.com wrote: I do not think you can build *bone6 per se. Unless Robert gives you exact steps, but there is this. https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-LinuxKernel Which if I'm not mistaken Roberts scripts should pull in all the latest patches. Perhaps you can dissect the scripts and figure out whats going on. Or wait until tomorrow for Robert to reply. On Sun, Jun 7, 2015 at 6:46 PM, Drew Fustini pdp7p...@gmail.com wrote: On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: sudo apt-get install linux-image-4.1.0-rc6-bone6 I want to compile modules in drivers/staging/fbtft. How can I get the source for 4.1.0-rc6-bone6? I don't see a tag for it in: https://github.com/RobertCNelson/linux-dev I did compile the capemgr branch: 4.1.0-rc6-capemgr-r13-00154-g37ef164 But it doesn't seem the capemgr exists when booting that kernel: # cat /sys/devices/platform/bone_capemgr/slots cat: /sys/devices/platform/bone_capemgr/slots: No such file or directory thanks, drew -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Enable SPI1 on 4.1 kernel?
On Sun, Jun 7, 2015 at 8:46 PM, Drew Fustini pdp7p...@gmail.com wrote: On Fri, Jun 5, 2015 at 2:01 PM, Robert Nelson robertcnel...@gmail.com wrote: sudo apt-get install linux-image-4.1.0-rc6-bone6 I want to compile modules in drivers/staging/fbtft. How can I get the source for 4.1.0-rc6-bone6? I don't see a tag for it in: https://github.com/RobertCNelson/linux-dev I did compile the capemgr branch: 4.1.0-rc6-capemgr-r13-00154-g37ef164 But it doesn't seem the capemgr exists when booting that kernel: # cat /sys/devices/platform/bone_capemgr/slots cat: /sys/devices/platform/bone_capemgr/slots: No such file or directory It's all in the bb-kernel repo now.. https://github.com/RobertCNelson/bb-kernel/tree/am33x-v4.1 no longer just experimental, but all merged in our 4.1.x branch, so there's no turning back!!! ;) Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
