Hello,
I am receiving errors w/ the .dtbo only. I am too far from outside to
communicate w/ my GPS and I am receiving no feedback w/ pyserial on my BBG
(BeagleBone Green). I tried installing a serial lib. w/ sudo apt install
python3-serial, also.
I just downloaded/installed the docs in .epub/html format on my hard drive.
I am thinking it may or may not be Adafruit_BBIO. I am also thinking that
it may be or may not be pyserial. The intallation w/ apt was faulty from
the get-go.
I can use config-pin p9.21 uart && config-pin p9.22 uart and have that
command turn successful.
...
It may be a faulty effort in an update from pyserial but I am not sure yet.
If this means anything, please let me know:
^CTraceback (most recent call last):
File "./FirstGPS.py", line 87, in <module>
myGPS.read()
File "./FirstGPS.py", line 47, in read
while ser.inWaiting() == 0:
File
"/home/debian/.local/lib/python3.7/site-packages/serial/serialutil.py",
line 593, in inWaiting
def inWaiting(self):
KeyboardInterrupt
The above error is only when I make no call to config-pin w/out a .dtbo
loaded. Also, pyserial is listed...
Now...this source below is after making a config-pin call to P9.21/22 and
trying to exit my program:
^CTraceback (most recent call last):
File "./FirstGPS.py", line 87, in <module>
myGPS.read()
File "./FirstGPS.py", line 47, in read
while ser.inWaiting() == 0:
File
"/home/debian/.local/lib/python3.7/site-packages/serial/serialutil.py",
line 594, in inWaiting
return self.in_waiting
File
"/home/debian/.local/lib/python3.7/site-packages/serial/serialposix.py",
line 549, in in_waiting
s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)
KeyboardInterrupt
Both...are screaming to me about pyserial and those specific locations. I
add print statements and receive nothing back. So, I think my source, which
is an update from Python2 (from utf-8 to bytes) to Python3, is faulty.
I can show you in case you are wondering. I am just updating some source I
found a while back.
Seth
On Monday, March 1, 2021 at 6:47:56 PM UTC-6 [email protected] wrote:
> You prompted me to recheck how I'm accessing the two peripherals I did get
> to install, the UART and the I2C. I'm only sending messages out over the
> UART using pyserial, although I do also use minicom to bi-directionally
> communicate with the board under test from the BBB Ubuntu command line. For
> the I2C I'm using the Adafruit char LCD library, which relies on busio from
> Circuit Python. Still an Adafruit product, but not technically the BBB_IO
> library, I guess.
>
> If anyone can give tips on how to do a button-based interrupt (abort)
> without BBB_IO, I'm all ears. I guess I could just start programming the
> BBB in C. I already program embedded microcontrollers in that language, so
> why not SBC?
>
>
> --
> Don Pancoe, P.E.
> Industrial Designer, Electrical Engineer
> DonPancoe.com <http://donpancoe.com/>
>
> On Mon, Mar 1, 2021 at 4:27 PM set_ <[email protected]> wrote:
>
>> Hello,
>>
>> I literally am havin' the same issue as you right now w/ a GPS module
>> working w/ BB-UART2-00A0.dtbo and a grove connector. This is my error:
>>
>> *py_setup_uart(UART2): set_pin_mode() failed for pin=P9_22Traceback (most
>> recent call last):*
>> * File "FirstGPS.py", line 5, in <module>*
>> * UART.setup("UART2")*
>> *ValueError: Set pin mode failed for uart channel.*
>>
>> I think things are changing at some point in some way at some level.
>> Vague...yes. I can set up my source w/out the .dtbo and use config-pin to
>> set my uart2 pins to have my source 'work.'
>>
>> Anyway, I will be following along to see how far you get b/c right now, I
>> am a little stumped as to why what has worked no longer is viable.
>>
>> Seth
>>
>> On Monday, March 1, 2021 at 12:27:01 PM UTC-6 [email protected] wrote:
>>
>>> Hello all,
>>>
>>> I have a BBB Python application (PCBA test fixture) where I am using
>>> libpruio, specifically for access to the eCAP pins. Libpruio requires that
>>> the universal cape be disabled, but when I needed a UART and I2C, I was
>>> able to add those back in using the existing dtbo files from /lib/firmware
>>> (shown below) in my uEnv.txt.
>>>
>>> uboot_overlay_addr0=/lib/firmware/BB-I2C1-00A0.dtbo
>>> uboot_overlay_addr1=/lib/firmware/BB-UART4-00A0.dtbo
>>> uboot_overlay_addr2=/lib/firmware/DP-GPIO-PCBATest-00A0.dtbo (I talk
>>> about this below)
>>>
>>>
>>> Now I want to add an "abort" button to the test fixture since the
>>> technicians have reported it takes a lot of time to reset if the board
>>> under test locks up. I expect that wiring a pushbutton to a GPIO with an
>>> interrupt is the way to handle this, and I've been thinking that there are
>>> two ways to get there.
>>>
>>> 1. Include another dtbo file to add a single GPIO that I can then
>>> access with Adafruit_BBIO (this is where my efforts have focused so
>>> far), or
>>> 2. Figure out how to work with the hardware-based IRQ of the PRU
>>> with libpruio (which I've been avoiding because it looks even more scary)
>>>
>>> I've tried to make a custom dtbo by following an example from Derek
>>> Molloy (github.com/derekmolloy/boneDeviceTree) and while it compiled
>>> and booted OK, I still get the following error when I run a simple test
>>> program. The same error as when I tried running the program before I
>>> created the dtbo.
>>>
>>> kapsul@beaglebone:~/pyDev$ sudo python3 abortTest.py
>>> Traceback (most recent call last):
>>> File "abortTest.py", line 6, in <module>
>>> GPIO.setup("P9_12", GPIO.IN)
>>> ValueError: Set gpio mode failed, missing file or invalid permissions.
>>>
>>>
>>> Further, when I do the following (with or without the dtbo), I get the
>>> following...
>>>
>>> kapsul@beaglebone:~/pyDev$ config-pin -q p9.12
>>> P9_12 pinmux file not found!
>>> Cannot read pinmux file: /sys/devices/platform/ocp/ocp*P9_12_pinmux/state
>>>
>>>
>>> Any input would be appreciated, whether it is correcting me on path 1 or
>>> steering me towards path 2. I will happily provide any additional info, but
>>> I didn't want to start uploading stuff until I know what, exactly, will be
>>> helpful.
>>>
>>> Thanks,
>>> --
>>> Don Pancoe, P.E.
>>> Industrial Designer, Electrical Engineer
>>> DonPancoe.com <http://donpancoe.com/>
>>>
>> --
>> For more options, visit http://beagleboard.org/discuss
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>>
>
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