**** BEGIN LOGGING AT Tue Dec 23 02:59:59 2014 Dec 23 03:27:25 which are different operations we can perform through beaglebone?? Dec 23 03:30:43 anyone help mi?? Dec 23 03:55:55 hi Dec 23 03:56:11 I deleted my /boot/uEnv.txt Dec 23 03:56:16 I can't boot up anymore Dec 23 03:56:19 what do I do? Dec 23 03:56:36 I have Debian, installed using netinstall Dec 23 03:56:41 I have Beaglebone Black Dec 23 04:06:16 hi experts Dec 23 04:07:12 today i received a mail from one of the distributors that TI has stopped the production of beagle bone boards Dec 23 04:07:20 is it true ?? Dec 23 04:45:24 i'm trying to use `GPIO3_18` (pin 42 on P9) and having no luck Dec 23 04:45:33 i know pin 41 and 42 are special Dec 23 04:45:46 and 41 works without an issue Dec 23 04:46:13 (using "41#") Dec 23 04:46:41 err, the second 41 thing. let's call it 41B Dec 23 04:47:02 i just can't get 42B to work. anyone have any experience with this? Dec 23 04:48:31 (before anyone asks, i'm planning on switching to PRU0 later, so switching GPIOs isn't an option for me) Dec 23 05:40:20 going to play around with building some bbb kernels... what is the most current, up-to-date, correct guide? this one? http://wiki.beyondlogic.org/index.php/BeagleBoneBlack_Building_Kernel ? or this one? http://elinux.org/Building_BBB_Kernel ? Dec 23 05:41:25 or this one? https://eewiki.net/display/linuxonarm/BeagleBone+Black Dec 23 05:42:21 it's been a couple years, and all my notes are very old (i.e. bitbake days) Dec 23 05:51:19 assuming HZ=1000 and I am receiving an edge-trigger interrupt from a GPIO(no FIFO, DMA,etc), how fast could the IRS be in theory? Dec 23 05:52:05 could a non-RT-patched kernel handle it with 1000HZ, that is, one interrupt per 1ms Dec 23 05:52:28 in theory that is. s/IRS/ISR/ Dec 23 06:06:03 if your interrupts are lasting 1ms, your ISR is probably waaay too long Dec 23 06:07:09 i guess it'd depend on what you're trying to do. Dec 23 06:12:28 kenrestivo: what's limiting the speed of a ISR(assuming the ISR just increase a counter and expose it to /proc or /sys so it's very fast) Dec 23 06:13:24 i mean, the speed for the kernel to serve a ISR, assuming the ISR takes nearly no time, but what's the speed limit for the ISR? Dec 23 06:13:33 what do you mean by "speed"? the length between what event A and what event B? Dec 23 06:13:50 do you mean latency between when the electricity hits the wire and when the irq handler executes? Dec 23 06:14:30 or the length of time the irq handler takes to execute, before another one can be handled? Dec 23 06:14:52 or any number of things. once you define those points, the answer might be obvious or easily googlable/calculatable Dec 23 06:16:33 the speed of ISR will probably be decided by latency+ISRRuntime, assuming cpu is fast enough Dec 23 06:17:18 say latency + IRS = 1ms, I can only handle 1000 edge trigger events, no more than that Dec 23 07:06:35 ausjke: 1000Hz should be possible if the interrupt handler is short enough. I've measured interrupt latency at http://blog.dan.drown.org/beaglebone-black-timer-capture-driver/ Dec 23 07:07:01 ausjke: between 6.04us-8.62us at 1ghz Dec 23 07:08:04 you'd be limited on how much you could do in an interrupt, to prevent a livelock situation Dec 23 10:12:44 Hai all, I have successfully initialized our custom lcd in uboot, and i don't know how to register panel information like hsync,vsync,pixclk for my lcd . Any ideas? Dec 23 12:02:32 Hi, Im working on getting the WL18xx cape working with a standard Yocto beaglebone build. I came so far that I now get the wl18xx wlan cape detected during boot but now I need to send the config bin to the wlan chip. I googled it and found some info but I wanted to ask if there is somebody here who already done it and could give a few tips on where to find the tools to generate the bin already? Dec 23 12:39:32 can anyone tell me what is normally the gpio response time for BBB? Dec 23 12:40:45 if i toggle a gpio for a pulse, what can be the pulse width resolution which i could get ? Dec 23 12:41:14 if you need to bitbang, write a kernel driver or use the PRU Dec 23 12:41:14 essentially if i toggle low-high-low with software... Dec 23 12:43:16 let's ask the other way around: what are you trying to do? Dec 23 12:43:58 i would like to have a 10us pulse on a gpio to control an external sensor Dec 23 12:45:19 Hi all! I am looking for linux kernel 3.16 for beagle-XM. Does it exist anywhere?? plz help. Dec 23 12:45:22 that's unlikely to work from userspace Dec 23 12:45:47 testBeagle: is that sensor using SPI or something else? Dec 23 12:46:06 i would also like to receive a pulse on another gpio which is pulse width modulated and can be anywhere from 150us to 35ms Dec 23 12:46:42 it is a normal ultrasonic sensor Dec 23 12:46:42 sounds like you should use the PRU or an additional microcontroller Dec 23 12:47:45 srf04? Dec 23 12:49:00 testBeagle: try asking the search engine of your least distrust for "beaglebone ultrasound pru" Dec 23 13:51:49 I am using beaglebone black. When I tried to connect to beaglebone with ssh root@192.168.7.2 I got this error "ssh_exchange_identification: Connection closed by remote host". Dec 23 13:52:02 What could be the reason Dec 23 15:13:53 has anyone used librf24-bbb with the beaglebone black? I am having a hell of a time getting this module/library to work Dec 23 15:18:28 did anyone managed to run node-webkit for bb with gst support? Dec 23 16:20:19 Hi everyone Dec 23 16:23:31 Today I plugged my BBB with a usb cable but not on a computer, on a strip, and only the PWR LED is lighting, the other LED not Dec 23 16:24:19 Before ot worked Dec 23 16:24:26 -o +i Dec 23 16:26:02 I think it's dead but I would like to have your opinion... Dec 23 16:32:27 I tried to hold down the power button, the boot + reset button, etc... and no one work Dec 23 17:35:34 ddrown: thanks, very useful blog Dec 23 17:44:22 !power Dec 23 17:46:44 How (or who) do I ask about updating the http://beagleboard.org/support/faq#Peripherals online document? Dec 23 17:47:46 likely jkridner Dec 23 17:48:10 The "What power peripherals are required/desirable?" should mention that the center pin is positive. Dec 23 17:53:28 When you hit and hold the down the letter 'a' on your keyboard, it takes a short amount of time for the letter to come up on the screen. In addition, as you hold down the letter 'a', it will start to project a's in the word document but at a slowed rate than the keyboard can register. What are these features called? Dec 23 17:55:36 debouncing? Dec 23 18:12:39 bpetersen: Typematic, or automatic repeat is the latter. Dec 23 18:16:33 debouncing would be making it register a single press Dec 23 20:33:05 Hi, my BBB has 4 Status LEDs lit up and won't boot, the OS "was" Arch. I connected via Debug Interface and tried to establish a serial connection via this command " screen /dev/USB0 115200 and waited for a minute. When I hit enter I get a "U-boot#" prompt. Can anyone point me into the right direction to get the BBB running again? Dec 23 20:34:52 a shot in the dark: try and load an angstrom image onto an SD card, and then do a fresh image from that. Dec 23 20:37:29 I already tried a debian flasher image and an arch flasher image and a standard arch image to boot from sd card. But I will try the Angstrom Image anyway. Other hints still welcome, thx Dec 23 20:38:12 well. you could tell that uboot thingy to boot from the sdcard Dec 23 20:38:25 unfortunately, im not familiar with uboot syntax, so youre gonna ve to google that one Dec 23 20:39:15 gurki: sounds good, I will try that Dec 23 22:32:30 Evening, i thought i'd play around with a BBB i used last year, but i'm having some problems getting it to boot. I get no video from HDMI and using wireshark i get nothing more then network connectivity, no traffic at all. Dec 23 22:33:16 I'd just like to confirm, isn't this a normal boot process http://youtu.be/g0z_F1wOnKs booting of an sd-card? Dec 23 22:34:58 pymagi: you can connect a serial cable with your host pc to see the console messages during boot Dec 23 22:35:01 I was wondering about loading ubutu on the beagle black. do I need an sd card ? Dec 23 22:35:14 Guest4149 no you can use the eMMC Dec 23 22:35:26 thanks Dec 23 22:35:39 hitlin37 hmm don't have one atm :( Dec 23 22:35:44 Guest4149: well, an sd card is always handy Dec 23 22:36:01 yea, plus you can use more gpios if you skip eMMC altogether Dec 23 22:36:11 also since I dont have video, can I use the net port for ssh since im sure i would need a ttl to line level rs232 converter Dec 23 22:36:45 What's the HDMI port for? Dec 23 22:36:57 Isn't that showing the boot process at all? Dec 23 22:37:33 not sure, i was wondering that too... usually serial console is my first choice Dec 23 22:38:31 well....display is now a commodity. Dec 23 22:38:50 I'm starting to wonder if the distro is using fsck since i haven't had it booted in over 9 months Dec 23 22:38:56 default is 180 days right? Dec 23 22:39:15 there is activity on the USR2 led Dec 23 22:40:17 but since USR1 is not lit i guess fsck is out of the question Dec 23 22:40:26 pymagi, looks normal... but without serial/hdmi data it's hard to say exactly.. Dec 23 22:40:53 with eth not plugged in, if you have a miss configured /etc/network/interfaces it can take 2 mins for dhcp to give up.. Dec 23 22:54:13 rcn weird thing is when i try usbcable no leds lit Dec 23 22:54:52 Not sure wether the drivers work on windows 8, but in device manager in windows i got AM335x USB and a warnig sign. Dec 23 22:55:21 I have a cisco console cable , would that do any good? Dec 23 22:55:40 not sure, usb cables are usb cables. Dec 23 22:55:56 really. Dec 23 22:55:58 wow. Dec 23 22:56:05 high robert, happy christmas Dec 23 22:56:20 Merry Christmas mrpackethead Dec 24 01:43:22 what's the correct/recommended cross-compiler toolkit to use for beagle kernel? Dec 24 01:43:34 i've seen a few different options out there Dec 24 02:53:16 kenrestivo: https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-ARMCrossCompiler:GCC Dec 24 02:53:33 that one, great thanks **** ENDING LOGGING AT Wed Dec 24 02:59:59 2014