unable to setup ADC #127

ManMan88 · 2016-12-08T07:44:45Z

Platform/operating system: BeagleBoneBlack with Ubuntu 16.04.1 LTS (GNU/Linux 4.4.34-ti-r69 armv7l)
Python version : Python 2.7.12
Error message:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: Unable to setup ADC system. Possible causes are:
  - A cape with a conflicting pin mapping is loaded
  - A device tree object is loaded that uses the same name for a fragment: helper

List the steps to reproduce the problem:

installing:

sudo ntpdate pool.ntp.org
sudo apt-get update
sudo apt-get install build-essential python-dev python-pip -y
git clone git://github.com/adafruit/adafruit-beaglebone-io-python.git
cd adafruit-beaglebone-io-python
sudo python setup.py install
cd ..
sudo rm -rf adafruit-beaglebone-io-python

in python:

import Adafruit_BBIO.ADC as ADC
ADC.setup()

The text was updated successfully, but these errors were encountered:

HobbitDur · 2016-12-08T11:01:16Z

I agree. I add that for me, if I lauch it once connected by SSH, it is working. But if i lauch it by a service, it doesn't work. But when I launched it with a sleep 40 on the serivce, it worked. Need to find out the cause (I add also that once it worked, the UART started to bug saying typeError in the serialposix)

pdp7 · 2016-12-09T02:24:21Z

@ManMan88 Please paste the contents of /boot/uEnv.txt and /sys/devices/platform/bone_capemgr/slots.

Adafruit_BBIO expects cape-universal to be in use for Linux 4.1+ kernels.

Also, I noticed that you are using Ubuntu. Where did the image you are using come from?

I only test Adafruit_BBIO with the official BeagleBoard.org Debian images created by @RobertCNelson:

The kernels are built using this repo:
https://github.com/RobertCNelson/ti-linux-kernel-dev/tree/ti-linux-4.4.y

pdp7 · 2016-12-09T02:25:56Z

@LudovicGuerra It sounds like you are describing a different problem. Please open up a new issue for it.

ManMan88 · 2016-12-09T11:59:36Z

@pdp7 I used the image from this link: https://rcn-ee.com/rootfs/2016-11-10/flasher/BBB-eMMC-flasher-ubuntu-16.04.1-console-armhf-2016-11-10-2gb.img.xz
It was given by: http://elinux.org/BeagleBoardUbuntu

The contents of /boot/uEnv.txt is:

#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

uname_r=4.4.34-ti-r69
##uuid=
#dtb=

##BeagleBone Black/Green dtb's for v4.1.x (BeagleBone White just works..)

##BeagleBone Black: HDMI (Audio/Video) disabled:
#dtb=am335x-boneblack-emmc-overlay.dtb

##BeagleBone Black: eMMC disabled:
#dtb=am335x-boneblack-hdmi-overlay.dtb

##BeagleBone Black: HDMI Audio/eMMC disabled:
#dtb=am335x-boneblack-nhdmi-overlay.dtb

##BeagleBone Black: HDMI (Audio/Video)/eMMC disabled:
#dtb=am335x-boneblack-overlay.dtb

##BeagleBone Black: wl1835
#dtb=am335x-boneblack-wl1835mod.dtb

##BeagleBone Green: eMMC disabled
#dtb=am335x-bonegreen-overlay.dtb

cmdline=coherent_pool=1M quiet cape_universal=enable

#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M quiet cape_universal=enable video=HDMI-A-1:1024x768@60e

##Example v3.8.x
#cape_disable=capemgr.disable_partno=
#cape_enable=capemgr.enable_partno=

##Example v4.1.x
#cape_disable=bone_capemgr.disable_partno=
#cape_enable=bone_capemgr.enable_partno=

##enable Generic eMMC Flasher:
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

uuid=f62d5c8b-d754-477f-8341-d1cccea1d3e5

And the contents of /sys/devices/platform/bone_capemgr/slots is:

 0: PF----  -1
 1: PF----  -1
 2: PF----  -1
 3: PF----  -1

RobertCNelson · 2016-12-09T16:01:10Z

@ManMan88 I've tried to keep the ubuntu target as close to the debian target for overlays, so this should still work on ubuntu.. (Sadly, other then booting, i really don't test ubuntu)

What is shown by:

dmesg | grep bone

after this occured:

raceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: Unable to setup ADC system. Possible causes are:
  - A cape with a conflicting pin mapping is loaded
  - A device tree object is loaded that uses the same name for a fragment: helper

Regards,

pdp7 · 2016-12-09T16:02:23Z

@ManMan88 I believe the issue is that cape-universal overlay isn't loaded.

You can try to load with:

echo cape-universaln > /sys/devices/platform/bone_capemgr/slots

You should then see:

root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots
 0: PF----  -1 
 1: PF----  -1 
 2: PF----  -1 
 3: PF----  -1 
 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,cape-universaln

If that fails, then please install the latest Device Tree overlays from:
https://github.com/beagleboard/bb.org-overlays

Also, if you don't explicity need Ubuntu, then I'd recommend switching to one of the official BeagleBoard.org Debian images

ManMan88 · 2016-12-09T23:08:29Z

@RobertCNelson, this is the output to what you asked me to do:

[    2.400035] bone_capemgr bone_capemgr: Baseboard: 'A335BNLT,000C,1816BBBK2050'
[    2.400068] bone_capemgr bone_capemgr: compatible-baseboard=ti,beaglebone-black - #slots=4
[    2.438234] bone_capemgr bone_capemgr: slot #0: No cape found
[    2.482229] bone_capemgr bone_capemgr: slot #1: No cape found
[    2.526225] bone_capemgr bone_capemgr: slot #2: No cape found
[    2.570225] bone_capemgr bone_capemgr: slot #3: No cape found
[    2.576126] bone_capemgr bone_capemgr: initialized OK.

@pdp7 , your first suggestion worked :) thanks! I very appreciate the fast help!

RobertCNelson · 2016-12-09T23:13:40Z

@pdp7 just ran into this today, both the elinux.org images ubuntu/debian, lack "cape_universal=enable" option in /boot/uEnv.txt

/boot/uEnv.txt: (current)

cmdline="coherent_pool=1M quiet"

/boot/uEnv.txt: (needed)

cmdline="coherent_pool=1M quiet cape_universal=enable"

with that change, things should work out of the box. .;)

Background, at some point a while back i make cape_universal a run time option in my generation script, the elinux images didn't get that memo..

Regards,

pdp7 · 2016-12-15T00:19:27Z

@ManMan88 Is this issue resolved?

ManMan88 · 2016-12-15T08:04:19Z

Yes, it is resolved. Thanks.

I have another issue with PWM that might be similar to this problem. However, I'll post a new issue on it.

acseckin · 2017-06-28T23:12:06Z

I have same problem when calling from crontab. This code works from terminal but gives these results when calling from crontab.

Traceback (most recent call last):
  File "/home/debian/hmrid/runhmrid.py", line 136, in <module>
    nhid=hmrid()
  File "/home/debian/hmrid/runhmrid.py", line 29, in __init__
    self.setupPins()
  File "/home/debian/hmrid/runhmrid.py", line 63, in setupPins
    ADC.setup()
RuntimeError: Unable to setup ADC system. Possible causes are:
  - A cape with a conflicting pin mapping is loaded
  - A device tree object is loaded that uses the same name for a fragment: helper

Here is my crontab code

@reboot /usr/bin/python /home/debian/hmrid/runhmrid.py >/home/debian/logcron.out 2>&1 &

On my Beaglebone Black device, I want to run a python code at startup which is shared here https://github.com/acseckin/hmrid. The pyhton code requires super user privilages. The debian version I used on the device was installed with the image "Debian 8.7 2017-03-19 4GB SD IOT". The code works fine from the terminal like.

sudo python /home/debian/hmrid/runhmrid.py

debian users and roots crontab does not work when I append the following line.

@reboot sudo python /home/debian/hmrid/runhmrid.py

But other code that does not require a super user is working perfectly when I add a crontab for a debian user like

@reboot python /home/debian/hmrid/runNotSuperUser.py

pdp7 · 2017-06-29T08:27:48Z

@acseckin I've been able to replicate this problem and am investigating.

pdp7 · 2017-06-29T09:49:24Z

I'm still investigating but I noticed that issue seems to be /sys/bus/iio/devices/iio:device0/in_voltage1_raw does not exist run the script is run at boot. From strace log:

open("/sys/devices/platform/bone_capemgr/slots", O_RDWR|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6
fef000
read(3, " 0: PF----  -1 \n 1: PF----  -1 \n"..., 4096) = 64
read(3, "", 4096)                       = 0
write(3, "BB-ADC", 6)                   = 6
close(3)                                = 0
munmap(0xb6fef000, 4096)                = 0
nanosleep({0, 200000000}, NULL)         = 0
open("/sys/bus/iio/devices/iio:device0/in_voltage1_raw", O_RDONLY) = -1 ENOENT

I am thinking the library may need to have a delay added to wait for in_voltage1_raw file to appear.

acseckin · 2017-06-29T11:01:07Z

I think the uEnv.txt configurations begin little bit after from crontab. How can we wait for enough time?

pdp7 · 2017-06-30T06:50:10Z

@acseckin I added a delay of 1 second after loading the ADC overlay and that seems to have resolved the issue. The script does now run OK at bootup.

Here is what I changed:

debian@beaglebone:~/ssh/adafruit-beaglebone-io-python$ git diff
diff --git a/source/c_adc.c b/source/c_adc.c
index b7f8f93..21ad284 100644
--- a/source/c_adc.c
+++ b/source/c_adc.c
@@ -57,6 +57,7 @@ BBIO_err initialize_adc(void)
     if (err == BBIO_OK) {
         strncat(adc_prefix_dir, "/sys/bus/iio/devices/iio:device0/in_voltage", sizeof(adc_prefix_dir));
         snprintf(test_path, sizeof(test_path), "%s%d_raw", adc_prefix_dir, 1);
+        sleep(1);
         fh = fopen(test_path, "r");
 
         if (!fh) {

For now, I've created a branch adc-fix which contains that change as commit 1997b53.

I'm looking at if this delay should be moved to the load_device_tree().

acseckin · 2017-06-30T16:58:04Z

Here is my new message after python /home/debian/init.py >/home/debian/cronlog.out 2>&1 &

[sudo] password for debian: *** buffer overflow detected ***: python terminated
Configuration
Setup pins
Unable to setup ADC system. Possible causes are:
  - A cape with a conflicting pin mapping is loaded
  - A device tree object is loaded that uses the same name for a fragment: helper
Setup pins

init.py** code

init.py.zip

pdp7 · 2017-07-01T04:37:06Z

@acseckin Could you paste the output of uname -a? @RobertCNelson recently told me there was an ADC bug that could could cause the buffer overlow error and it was fixed in newer kernel.

Please run /opt/scripts/tools/update_kernel.sh

pdp7 · 2017-07-01T05:40:20Z

@acseckin Please run this to upgrade to the latest 4.9 kernel build by @RobertCNelson:
/opt/scripts/tools/update_kernel.sh --lts-4_9

This is the ADC fix that I referenced above:
RobertCNelson/ti-linux-kernel@dca0265

pdp7 · 2017-07-01T05:45:58Z

I've just tried 4.9.35-ti-r44 but unfortunately that does not resolve the issue:

debian@beaglebone:~$ cat cronlog.out 
*** buffer overflow detected ***: python terminated
Configuration
Setup pins
Unable to setup ADC system. Possible causes are: 
  - A cape with a conflicting pin mapping is loaded 
  - A device tree object is loaded that uses the same name for a fragment: helper
Setup pins

debian@beaglebone:~$ uname -a
Linux beaglebone 4.9.35-ti-r44 #1 SMP PREEMPT Fri Jun 30 22:17:16 UTC 2017 armv7l GNU/Linux

acseckin · 2017-07-01T10:02:56Z

Same results for my settings.

pdp7 · 2017-07-01T10:22:52Z

@acseckin I've found that delay of 30 seconds resolves the issue. Add time.sleep(30) before ADC.setup() in init.py:

--- init.py.orig	2017-07-01 05:37:39.696002694 +0000
+++ init.py	2017-07-01 10:15:37.641031199 +0000
@@ -62,7 +62,15 @@
         #print self.rxoff,self.ryoff
     def setupPins(self):
         self.log2file("ADC")
+
+        print("setupPins: sleep")
+        time.sleep(30)
+        print("setupPins: call ADC.setup()")
         ADC.setup()
+        print("setupPins: ADC.setup() complete")
+        os.system("cat /sys/devices/platform/bone_capemgr/slots")
+        os.system("cat /sys/bus/iio/devices/iio:device0/in_voltage1_raw")
+
         self.log2file("digital pins")
         GPIO.setup("P9_11", GPIO.IN)
         GPIO.setup("P8_17", GPIO.IN)
@@ -93,7 +101,7 @@
                         for i in [5,4,3,2,1,0]:
                             self.lcddisp("Reboot:"+str(i))
                             time.sleep(1)
-                        os.system("sudo reboot")
+                        #os.system("sudo reboot")
                     elif GPIO.input("P8_17")|GPIO.input("P8_15")|GPIO.input("P8_11")|GPIO.input("P8_9"):
                         break
         elif GPIO.input("P8_17"):

cronlog.out

 0: PF----  -1 
 1: PF----  -1 
 2: PF----  -1 
 3: PF----  -1 
 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,cape-universal
 5: P-O-L-   1 Override Board Name,00A0,Override Manuf,BB-ADC
3689
Configuration
Setup pins
setupPins: sleep
setupPins: call ADC.setup()
setupPins: ADC.setup() complete
Offsetting
Inital input read
[10, 16, 59, 175455]	[1066,1500]	[1417,1498]n
[1066,1500]
[1417,1498]n
WSN setup
WSN-UART2
END OF INIT
[10, 16, 59, 964031]	[1064,1500]	[1413,1489]n
[1064,1500]
[1413,1489]n
[10, 17, 0, 141943]	[1065,1500]	[1413,1482]n
[1065,1500]
[1413,1482]n
[10, 17, 0, 312462]	[1064,1500]	[1414,1491]n
[1064,1500]
[1414,1491]n
[10, 17, 0, 505001]	[1067,1500]	[1416,1491]n
[1067,1500]
[1416,1491]n
[10, 17, 0, 699227]	[1067,1500]	[1416,1490]n
[1067,1500]
[1416,1490]n
[10, 17, 0, 881084]	[1067,1500]	[1416,1486]n
[1067,1500]
[1416,1486]n
[10, 17, 1, 76251]	[1068,1500]	[1416,1491]n
[1068,1500]

root crontab:

@reboot python /home/debian/init.py >/home/debian/cronlog.out 2>&1 &

acseckin · 2017-07-01T11:19:33Z

Thank you a lot. Now it is working. Here are steps as a summary:
1- run update
/opt/scripts/tools/update_kernel.sh --lts-4_9
2- write code with 30 sec sleep before ADC.setup() and configs like ( init.py.zip)
time.sleep(30)
ADC.setup()
os.system("cat /sys/devices/platform/bone_capemgr/slots")
os.system("cat /sys/bus/iio/devices/iio:device0/in_voltage1_raw")
3- Edit crontab of root with
sudo crontab -e -u root
and append this line
@reboot python /home/debian/init.py >/home/debian/cronlog.out 2>&1 &
4- reboot and working fine.

pdp7 · 2017-07-01T20:26:15Z

@acseckin great to hear! OK to close this issue?

acseckin · 2017-07-01T20:38:36Z

Yes you can close.

acseckin · 2017-07-13T12:30:52Z

Hi, adding this line to uEnv.txt also works

cape_enable=bone_capemgr.enable_partno=BB-UART2,BB-ADC

pdp7 closed this as completed Dec 15, 2016

pdp7 reopened this Jun 30, 2017

pdp7 self-assigned this Jun 30, 2017

pdp7 mentioned this issue Jul 1, 2017

Sleep after loading ADC overlay to allow driver load #148

Merged

pdp7 closed this as completed Jul 3, 2017

acourdavault mentioned this issue Nov 22, 2017

HDMI audio osc disabled with standard overlay on BBBW RobertCNelson/bb.org-overlays#20

Closed

sampathkmurthy mentioned this issue Jul 24, 2018

RuntimeError: Unable to setup ADC system #269

Closed

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unable to setup ADC #127

unable to setup ADC #127

ManMan88 commented Dec 8, 2016 •

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unable to setup ADC #127

unable to setup ADC #127

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init.py** code

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cronlog.out

root crontab:

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