Re: [beagleboard] How is uEnv.txt resolved when using raw mode?

[Robert Nelson]

On Fri, Jul 14, 2017 at 4:23 PM, Kenny Koller
 wrote:
> I was informed that the following is invoked by U-Boot:
>
> env import -t -r $loadaddr $filesize
>
> I'm not sure what the flags do and have so far been unable to find
> documentation for them. But I believe this is acting on an environment that
> has been loaded in a previous command.
>
> What is the previous step to load this? In other words, where is U-Boot
> looking for the uEnv.txt?
>
> The Partition 2.0 document was vague (to me) on this point. Probably makes
> sense in some context.
>
> It isn't clear to me from this page either. It seems to imply that it will
> search for it on /boot of the root filesystem. My one and only bootable
> partition is EXT4 so it would require calling ext4load (I believe). The
> output is trying to do something with the MMC but never finds what it is
> looking for. I'm not sure which image it is trying to load. Surprised there
> isn't a message somewhere saying "Trying to load environment" or "Trying to
> load Kernel" or whatever.
>
> Using U-Boot 2017.01.

Both my guides reference a patch required, if you are just using
U-Boot 2017.01 (aka un-patched).. Reading my documentation is useless
for you.

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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[beagleboard] How is uEnv.txt resolved when using raw mode?

[Kenny Koller]

I was informed that the following is invoked by U-Boot:

env import -t -r $loadaddr $filesize 

I'm not sure what the flags do and have so far been unable to find 
documentation for them. But I believe this is acting on an environment that 
has been loaded in a previous command. 

What is the previous step to load this? In other words, where is U-Boot 
looking for the uEnv.txt?

The Partition 2.0 document 

 was 
vague (to me) on this point. Probably makes sense in some context.

It isn't clear to me from this page 

 
either. It seems to imply that it will search for it on /boot of the root 
filesystem. My one and only bootable partition is EXT4 so it would require 
calling ext4load (I believe). The output is trying to do something with the 
MMC but never finds what it is looking for. I'm not sure which image it is 
trying to load. Surprised there isn't a message somewhere saying "Trying to 
load environment" or "Trying to load Kernel" or whatever.

Using U-Boot 2017.01.


=> boot
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
** File not found boot.scr **
** Unrecognized filesystem type **
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
** Invalid partition 2 **
** First descriptor is NOT a primary desc on 1:1 **
switch to partitions #0, OK
mmc1(part 0) is current device
** No partition table - mmc 1 **
** First descriptor is NOT a primary desc on 1:1 **
switch to partitions #0, OK
mmc1(part 0) is current device
** First descriptor is NOT a primary desc on 1:1 **
SD/MMC found on device 1
** No partition table - mmc 1 **
## Error: "bootcmd_nand0" not defined
starting USB...
USB0:   Port not available.
cpsw Waiting for PHY auto negotiation to complete...

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Re: [beagleboard] How do I Perform a Factory Reset on the BBBW?

[Tomas Medina]

Thank you so much, Robert and Graham.

>  
>

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Re: [beagleboard] How do I Perform a Factory Reset on the BBBW?

[Graham]

Or, follow the instructions at

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#i_take_full_responsibility_for_knowing_my_beagle_is_now_insecure

if you want to turn off the access security, to make access easy during 
development.

--- Graham

==

On Friday, July 14, 2017 at 3:52:47 PM UTC-5, RobertCNelson wrote:
>
> On Fri, Jul 14, 2017 at 3:44 PM, Tomas Medina  > wrote: 
> > Thanks for giving me the image file. I can connect the bone to Wi-Fi, 
> but 
> > now it has the debian:temppwd login credentials instead of root and I 
> can't 
> > access or alter certain directories and files, including /boot/uEnv.txt 
> > without using the sudo command. Is there any way I can change it? 
>
> "sudo su" 
>
> root access thru "ssh" is the only thing we disabled.. 
>
> You can still login as root thru: 
>
> hdmi console 
> serial console 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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Re: [beagleboard] How do I Perform a Factory Reset on the BBBW?

[Robert Nelson]

On Fri, Jul 14, 2017 at 3:44 PM, Tomas Medina  wrote:
> Thanks for giving me the image file. I can connect the bone to Wi-Fi, but
> now it has the debian:temppwd login credentials instead of root and I can't
> access or alter certain directories and files, including /boot/uEnv.txt
> without using the sudo command. Is there any way I can change it?

"sudo su"

root access thru "ssh" is the only thing we disabled..

You can still login as root thru:

hdmi console
serial console

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] How do I Perform a Factory Reset on the BBBW?

[Tomas Medina]

Thanks for giving me the image file. I can connect the bone to Wi-Fi, but 
now it has the debian:temppwd login credentials instead of root and I can't 
access or alter certain directories and files, including /boot/uEnv.txt 
without using the sudo command. Is there any way I can change it?

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Re: [beagleboard] Re: wlan0

[Robert Nelson]

On Fri, Jul 14, 2017 at 9:26 AM,   wrote:
> Hello Ari,
>
> using a BeagleBone.org Debian Image 2017-03-19, I was able to configure BB
> Blue for my network using connman instructions from this gist:
> https://gist.github.com/kylemanna/6930087
>
> Very similar to what you did, but not calling 'enable wifi', 'tether wifi
> disable', and 'agent on'.
> Also, I directly wrote the settings (including the passphrase) to
> /var/lib/conman/xyz-psk.config, as explained in the gist.
> Finally I had to tell my router to accept the new device ;-)
>
> However, I am struggling to modify the Accesspoint default password, or even
> just disabling the AccessPoint. Very nice that
>  AP and Wifi Client connections are possible at the same time though.

The access point is controlled thru: /etc/default/bb-wl18xx

make sure you have latest version of: bb-wl18xx-firmware

# TETHER_ENABLED: Whether or not to run the /usr/bin/bb-wl18xx-tether
daemon; set to no to disable.
TETHER_ENABLED=yes

# USE_CONNMAN_TETHER: Whether or not to just use connman tether
inteface; set to no to disable.
USE_CONNMAN_TETHER=no

# USE_WL18XX_IP_PREFIX: default IP block of SoftAP0 interface
USE_WL18XX_IP_PREFIX="192.168.8"

# USE_WL18XX_MAC_ADDRESS: use custom mac address, for when work wifi
starts sending deauthentication packet spam.
#USE_WL18XX_MAC_ADDRESS="EC:11:27:B:14:97"

# USE_PERSONAL_SSID: set custom ssid
USE_PERSONAL_SSID="BeagleBone"

# USE_PERSONAL_PASSWORD: set ssid password
USE_PERSONAL_PASSWORD="BeagleBone"

# USE_GENERATED_DNSMASQ: use generated version of
/etc/dnsmasq.d/SoftAp0; set to no so user can modify
/etc/dnsmasq.d/SoftAp0
USE_GENERATED_DNSMASQ=yes

# USE_GENERATED_HOSTAPD: use generated version of /etc/hostapd.conf;
set to no so user can modify /etc/hostapd.conf
USE_GENERATED_HOSTAPD=yes

# USE_APPENDED_SSID: appends mac address after SSID (aka -WXYZ, BeagleBone-WXYZ)
USE_APPENDED_SSID=yes

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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[beagleboard] Re: wlan0

[kmorgenstern]

Hello Ari, 

using a BeagleBone.org Debian Image 2017-03-19, I was able to configure BB 
Blue for my network using connman instructions from this 
gist: https://gist.github.com/kylemanna/6930087

Very similar to what you did, but not calling 'enable wifi', 'tether wifi 
disable', and 'agent on'. 
Also, I directly wrote the settings (including the passphrase) to 
/var/lib/conman/xyz-psk.config, as explained in the gist.
Finally I had to tell my router to accept the new device ;-)

However, I am struggling to modify the Accesspoint default password, or 
even just disabling the AccessPoint. Very nice that
 AP and Wifi Client connections are possible at the same time though.

Greetings, Kjell

Am Sonntag, 28. Mai 2017 00:11:49 UTC+2 schrieb Ari Krupnik:
>
> I'm trying to connect my BB Blue to my local wifi. I can ssh into the 
> board through USB. I can also connect to the onboard AP and ssh through 
> that. I am failing to connect the board as a client to my WiFi router.
>
> root@beaglebone:/home/debian# connmanctl 
> connmanctl> enable wifi
> Error wifi: Already enabled
> connmanctl> tether wifi disable
> Error disabling wifi tethering: Already disabled
> connmanctl> scan wifi
> Scan completed for wifi
> connmanctl> services 
> ATT2F5HVb4   wifi_f45eab3dac4c_41545432463548566234_managed_psk
> NTGR_VMB_1406851422 
>  wifi_f45eab3dac4c_4e5447525f564d425f31343036383531343232_managed_psk
> connmanctl> agent on
> Agent registered
> connmanctl> connect wifi_f45eab3dac4c_41545432463548566234_managed_psk
> Agent RequestInput wifi_f45eab3dac4c_41545432463548566234_managed_psk
>   Passphrase = [ Type=psk, Requirement=mandatory, Alternates=[ WPS ] ]
>   WPS = [ Type=wpspin, Requirement=alternate ]
> Passphrase? 
> Agent ReportError wifi_f45eab3dac4c_41545432463548566234_managed_psk
>   connect-failed
> Agent request cancelled by ConnMan
> Error 
> /net/connman/service/wifi_f45eab3dac4c_41545432463548566234_managed_psk: 
> Operation aborted
> connmanctl>
> Enter code here...
>
>
>
>

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[beagleboard] Re: Reading BBB ADC's using QNX

[sethary]

Hey Acheesehead,

 funny name :) I'm sitting here with the same problem and want to use the 
adc of beaglebone black with qnx. But i cant figure out how it will work. 
Can help me? I read you did it and it works.

Best Regards
Sethary

Am Donnerstag, 12. März 2015 18:14:23 UTC+1 schrieb acheesehead:
>
> Got it!
>
> Steps 1 & 2 are not necessary. The rest is pretty straight-forward.
>
> On Wednesday, March 11, 2015 at 2:27:30 PM UTC-6, acheesehead wrote:
>>
>> I want to read the BBB ADC inputs using the QNX operating system. As no 
>> driver is provided in the QNX BSP, I need to write low-level C code to do 
>> this. I figure I need to do the following steps:
>>
>> 1. Put the pins in the right mux mode
>> 2. Turn on the clock to the ADC
>> 3. Set up the 'steps'
>> 4. Start a conversion sequence
>> 5. Wait for the sequence to end
>> 6. Read the sampled values
>>
>> I have not found any low-level code that does this. It would be greatly 
>> appreciated if anybody could provide example register-level code to do this.
>>
>> Thanks in advance!
>>
>>

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Re: [beagleboard] How do I Perform a Factory Reset on the BBBW?

[Robert Nelson]

On Fri, Jul 14, 2017 at 12:26 PM, Tomas Medina  wrote:
> I had trouble connecting to my Beaglebone Black Wireless, so I tried
> flashing it with the following image:
> https://debian.beagleboard.org/images/bone-debian-8.4-lxqt-4gb-armhf-2016-05-13-4gb.img.xz.
> It connects fine now and I can use it again, but now it no longer has Wi-Fi
> functionality. I also had some difficulty flashing the latest images; the
> username:password was debian:temppwd and I couldn't access certain files. I
> read somewhere that the images themselves are "insecure", but I'm not sure
> what that means. How do I reset my BBBW to the way it was when I got it?

That's expected... the "2016-05-13" image was BEFORE the BBBW was released..

Just grap the latest monthy snapshot:

https://rcn-ee.net/rootfs/bb.org/testing/2017-07-01/lxqt-4gb/

If you still have issues with 2017.07.01 run:

sudo /opt/scripts/tools/version.sh

and report it's output.


Regards,

-- 
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https://rcn-ee.com/

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[beagleboard] How do I Perform a Factory Reset on the BBBW?

[Tomas Medina]

I had trouble connecting to my Beaglebone Black Wireless, so I tried 
flashing it with the following image: 
https://debian.beagleboard.org/images/bone-debian-8.4-lxqt-4gb-armhf-2016-05-13-4gb.img.xz.
 

It connects fine now and I can use it again, but now it no longer has Wi-Fi 
functionality. I also had some difficulty flashing the latest images; the 
username:password was debian:temppwd and I couldn't access certain files. I 
read somewhere that the images themselves are "insecure", but I'm not sure 
what that means. How do I reset my BBBW to the way it was when I got it?

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[beagleboard] Re: Python GPIO Error

[robert_cheto]

Hi I have the same problem but I don't know how to change the directory you 
mentioned, would you tell me how should I do it?

El miércoles, 21 de agosto de 2013, 0:15:08 (UTC-5), markd...@gmail.com 
escribió:
>
> Changing the current directory should help.
>
> Python is loading Adafruit_BBIO from the current (source) directory, which 
> only contains the __init__.py file.   By changing the current directory, it 
> will load it from the correct (installed) area, which contains the other 
> pieces (such as GPIO.so)
>
> On Friday, August 2, 2013 2:51:54 PM UTC-5, ikeg...@gmail.com wrote:
>>
>> Greetings. I ssh into my BB_B and I have followed this guide 
>> 
>>  
>> and everything works fine. However when I try typing this code to test my 
>> installation it doesn't work: 
>>
>>1. python -c "import Adafruit_BBIO.GPIO as GPIO; print GPIO"
>>
>>
>> I get an error: 
>>
>> root@beaglebone:~/adafruit-beaglebone-io-python# python blink.py 
>> Traceback (most recent call last): File "blink.py", line 1, in  
>> import Adafruit_BBIO.GPIO as GPIO ImportError: No module named GPIO
>>
>>
>> root@beaglebone:~/adafruit-beaglebone-io-python# python -c "import 
>> Adafruit_BBIO.GPIO as GPIO; print GPIO"
>> Traceback (most recent call last):
>>   File "", line 1, in 
>> ImportError: No module named GPIO
>> root@beaglebone:~/adafruit-beaglebone-io-python#
>>
>> I tried to move along in the guide and typed this code into a new python 
>> file called blink.py:
>>
>> import Adafruit_BBIO.GPIO as GPIO
>> import time
>>  
>> GPIO.setup("P8_10", GPIO.OUT)
>>  
>> while True:
>>  GPIO.output("P8_10", GPIO.HIGH)
>>  time.sleep(0.5)
>>  GPIO.output("P8_10", GPIO.LOW)
>>  time.sleep(0.5)
>>
>>
>>
>> When I try to run blink.py I get a similar error to the one above:
>>
>> root@beaglebone:~/adafruit-beaglebone-io-python# python blink.py 
>> Traceback (most recent call last): File "blink.py", line 1, in  
>> import Adafruit_BBIO.GPIO as GPIO ImportError: No module named GPIO
>>
>>
>> So I know something is up with my GPIO ports but I just do not know what. 
>> Please help me.
>> Thanks for reading
>>
>>

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[beagleboard] Re: PWM not working in pins P9_14 & P9_16 in BBB

[sajeevan k]

Hi all,

Now I could make P9_14 working as PWM, with a Python script importing 
Adafruit_BBIO.PWM.

But for this to work, I need to enable the below line in uEnv.txt

cmdline=coherent_pool=1M net.ifnames=0 quiet cape_universal=enable

But enabling this line will make my other applications(including UARTs, 
I2Cs) not working.

Any way to make all things working?

Thanks & Regards,
Sajeevan.K

On Thursday, July 13, 2017 at 10:06:18 AM UTC+5:30, sajeevan k wrote:
>
> Hi all,
>
> Let me make my question short.
>
> I could configure the pins P9_21 and P9_22 as PWM output using BB-PWM0 
> overlay.
> But why it is not possible configure the the pins P9_14 & P9_16 and P8_13 
> & P8_19 as PWM signals, by doing the same procedure with BB-PWM2 and 
> BB-PWM1 overlays?
>
> Thanks & Regards,
> Sajeevan.K
>
> On Wednesday, July 12, 2017 at 5:30:15 PM UTC+5:30, sajeevan k wrote:
>>
>>
>> Hi all,
>>
>> I have already configured the pins P9_21 and P9_22 for PWM function using 
>>
>> BB-PWM0 overlays.
>>
>>
>> But now I want to use these pins as UART and some other pins as PWM.
>>
>>
>> I tried to make P9_14(EHRPWM1A) & P9_16(EHRPWM1B). For this I used the 
>> overlay BB-PWM1.
>>
>> A part of *BB-PWM1-00A0.dts* is shown here to confirm that BB-PWM1 
>> corresponds to P9_14(EHRPWM1A) & P9_16(EHRPWM1B).
>>
>>
>>
>> fragment@0 { 
>> target = <_pinmux>; 
>> __overlay__ { 
>> pinctrl_spec: Panel_Pins { 
>> pinctrl-single,pins = < 
>> 0x48 0x06 /* (U14) gpmc_a2.ehrpwm1A */ 
>> 0x4c 0x06 /* (T14) gpmc_a3.ehrpwm1B */ 
>> >; 
>> }; 
>> }; 
>> };
>>
>>
>>
>>
>> This is creating a folder pwmchip4 in /sys/class/pwm directory.
>>
>> Then with the following commands, pwm0 and pwm1 are created in  
>> /sys/class/pwm/pwmchip4 directory.
>>
>>
>> sudo echo 0 > /sys/class/pwm/pwmchip4/export
>>
>> sudo echo 1 > /sys/class/pwm/pwmchip4/export
>>
>>
>>
>> And software written same as in the case of P9_21 and P9_22.
>>
>>
>> But PWM signals are not appearing in P9_14(EHRPWM1A) & P9_16(EHRPWM1B).
>>
>>
>>
>> I tried also P8_13(ehrpwm2B) & P8_19(ehrpwm2A) in the same way with  
>> BB-PWM2 overlay. 
>>
>> This is creating a folder pwmchip2 in /sys/class/pwm directory. These are 
>> also not working.
>>
>>
>> I think I am missing something. 
>>
>>
>>
>> Please help me to find out a solution.
>>
>>
>> Thanks in advance for the help.
>>
>>
>> Thanks & Regards,
>> Sajeevan.K
>>
>

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