abelectronicsuk / abelectronics_python3_libraries Goto Github PK

Hello,

Any plans to publish this as PyPI package? Or at least package it up for that so it can be installed using pip from github directly:

$ pip install git+https://github.com/abelectronicsuk/ABElectronics_Python3_Libraries.git
Collecting git+https://github.com/abelectronicsuk/ABElectronics_Python3_Libraries.git
  Cloning https://github.com/abelectronicsuk/ABElectronics_Python3_Libraries.git to /tmp/pip-4x8t8c8f-build
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/home/tadas/.virtualenvs/spaceship/lib/python3.4/tokenize.py", line 438, in open
        buffer = _builtin_open(filename, 'rb')
    FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-4x8t8c8f-build/setup.py'
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-4x8t8c8f-build/

Many Thanks,
Tadas

Hi, I'm having trouble getting my Expander Pi board running. I'm trying to test the ADC but the code cannot find the necessary module.

This is the full error, from Python 3.4.2 Shell on Raspberry Pi Raspbian Jessie -:

Traceback (most recent call last):
  File "/home/pi/Desktop/adctest.py", line 3, in <module>
    from ABE_ExpanderPi import ADC
ImportError: No module named 'ABE_ExpanderPi'
>>> 

I've followed the instructions on https://github.com/abelectronicsuk/ABElectronics_Python3_Libraries/tree/master/ExpanderPi and https://www.abelectronics.co.uk/kb/article/1/i2c--smbus-and-raspbian-wheezy

Running the command:

export

The output includes the line:

declare -x PYTHONPATH=":/home/pi/ABElectronics_Python3_Libraries/ExpanderPi/"

So the Python Path should be known.

Thanks for any help, cheers.

The difference in ABE_helpers.py between python3 and python is:

python3: raise ImportError("python-smbus not found'")
python2: raise ImportError("python-smbus not found. Install with 'sudo apt-get install python-smbus'")

suggest adding text: Install with 'sudo apt-get install python3-smbus'

Based upon the product webpage the maximum stated ADC clock speed under python is 12,000 samples per second. Even when changing the value of the spi clock in the ABE_ADCDACPi.py the speed seems to be fairly static at around 200 us. I'm using raspberry pi w with Jessie. Can anyone describe how to enable similar speeds for the ADC module?

Original:
spiADC.max_speed_hz = (900000)
Changed to:
spiADC.max_speed_hz = (25000000)

Code used for the test:

from ABE_ADCDACPi import ADCDACPi
import time
import numpy as N
import datetime
adcdac = ADCDACPi() # create an instance of ADCDACPi

adcdac.set_adc_refvoltage(3.3)

numPnts = 1000
a = N.zeros(numPnts)
counter = 1
starttime = datetime.datetime.now()
print(starttime)
while (counter < numPnts):
# read the voltage from channel 1
a[counter] = adcdac.read_adc_raw(1,0)
counter+=1
endtime = datetime.datetime.now()

print(endtime - starttime)
print(endtime)