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ul-gh / PiPyADC

Python classes for interfacing Texas Instruments analog-to-digital converters with the Raspberry Pi
GNU Lesser General Public License v2.1
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Unable to open SPI device: No such file or directory #5

Open BirdingPix opened 6 years ago

BirdingPix commented 6 years ago

I finally am asking for a bit of help since I cannot solve this myself.

I get this error when running example.py (or benchmark.py): Unable to open SPI device: No such file or directory

The error occurs when executing this line in pipyadc: fd = wp.wiringPiSPISetupMode( conf.SPI_CHANNEL, conf.SPI_FREQUENCY, conf.SPI_MODE)

screen shot 2017-12-22 at 2 38 48 pm

The values are correct but unable to get past this error.
Pls offer some guidance... THANK YOU!

I know the Waveshare High-Precision AD/DA hardware is running ok as their little demo program works (sudo ./ads1256_test). but I need to run this within PYTHON environment.

thanks again for any help!
Dave Houston, TX

ul-gh commented 6 years ago

Dear Dave,

this looks as if the Linux device file is missing - which could be a kernel configuration or kernel version issue.

Can you post the output of the following commands:

ls -l /dev/spi grep "^dt." /boot/config.txt uname -a cat /etc/os-release lsmod

I do not have my Raspberry Pis with the ADC board at hand as I am on Christmas vacation for the next two weeks. Maybe I can borrow one from a friend for testing this. Maybe this is not even necessary.

Let us fix this before Christmas!

Best wishes, Ulrich

BirdingPix commented 6 years ago

Ulrich, THANK YOU so much for fast reply. I've continued working on it and just got it working! Even though the other test program worked... and raspi-config said SPI was ON... I changed the /boot/config.txt file to uncomment dtparam=spi=on andf also added dtoverlay=spi-bcm2835

Not sure which fixed it, but now for the first time... your example.py is working so I can progress!

THANK YOU! I'll keep you posted on my progress. Dave