momsfriendlyrobotcompany/fake_rpi

fake interface for raspberry pi development and unit testing

fake_rpi's Issues

Import errors on Python 3.6 and 3.7

importlib_metadata needs to be installed when using Python 3.6 and 3.7

It would be helpful to list that as a dependency or insert $ pip install importlib-metadata as a part of the installation.

GPIO.setmode(io.BCM) Error name 'io' not defined

Hi
Thanks for providing this helpful module.
Unfortunatly ...

The line GPIO.setmode(io.BCM)
Causes the pyton error ;- name 'io' not defined

( background ...tested using either python 2.7 or python 3.7, in Microsoft Visual Studio Community 2019, Version 16.7.4
using fake_rpi version 0.6.2 )

Error when calling RPi.GPIO.cleanup without arguments

I got an IndexError when calling RPi.GPIO.cleanup without arguments.

int.setmode()
int.setup(1,)
int.setup(0,)
int.output(True,)
int.output(False,)
int.input(): 1
1
Traceback (most recent call last):
  File "test.py", line 26, in <module>
    GPIO.cleanup()
  File "/usr/local/lib/python3.5/dist-packages/fake_rpi/wrappers.py", line 19, in wrapped
    c = str(args[0].__class__).split('\'')
IndexError: tuple index out of range

# Replace libraries by fake ones
import sys
import fake_rpi

sys.modules['RPi'] = fake_rpi.RPi     # Fake RPi (GPIO)
#sys.modules['smbus'] = fake_rpi.smbus # Fake smbus (I2C)

from RPi import GPIO
import random, time


GPIO.setmode(GPIO.BOARD)

GPIO.setup(1, GPIO.IN)
GPIO.setup(2, GPIO.OUT)

GPIO.output(2, True)
GPIO.output(2, False)

input1 = GPIO.input(1)

print(input1)

GPIO.cleanup()

IC2 bytes have 8 bits, therefore returned values from fake generators shouldn't be greater than 255.

IC2 bytes have 8 bits, therefore returned values from fake generators shouldn't be greater than 255.

The following example shows the issue when converting potentially generated bytes to integer:

In [1]: int.from_bytes([1, 256], byteorder='big')                                                                                                                                                                                                                                         
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-1-724da94e3d44> in <module>
----> 1 int.from_bytes([1, 256], byteorder='big')

ValueError: bytes must be in range(0, 256)

Does this support gpiozero?

Great project, guys.

Should this also be working with gpiozero or only RPi.GPIO?
I'm trying to set up travis-ci and am having the test fail.

If I´m using gpiozero the error I get is:
gpiozero.exc.PinUnknownPi: unable to locate Pi revision in /proc/device-tree or /proc/cpuinfo
and with RPi.GPIO,
travis doesn't seem to be able to find and install the library in the first place.

Running it locally on a RaspberryPi 2 Model B everything seems to be working well with both gpiozero and RPi.GPIO. (without fake_rpi)

I was hoping that you might have some pointers, since it seems like this was one of the intended uses of the project.

Transparent faking

Hi,

I could make it work with fake RPi.GPIO and smbus in my application.

But I can't change all the imports (from from RPi.GPIO import GPIO to from fake_rpi import GPIO) in my project and all dependencies.

So I found a solution inspired by this stackoverflow answer something that replace the modules by this fake one:

import sys
import fake_rpi

sys.modules['RPi'] = fake_rpi
sys.modules['smbus'] = fake_rpi

# Then everywhere...
import RPi.GPIO as GPIO
import smbus

Then, I don't need to change my project and dependencies imports, I just have to replace modules once in my main file.

It could work if inside the folder fake_rpi, there were another modules that reflect the RPi, smbus... modules

Do you think this way of using fake_rpi is relevent ?

Wrong return type read_word_data()

Environment

• Raspberry pi 4
• raspian buster
• python 3.7
• latest fake_rpi

Description

Function returns wrong type. List of integer instead of an integer. Maybe there are more mismatches.

fake_rpi/fake_rpi/smbus/smbus.py

Lines 29 to 31 in eb2f640

	@printf
	def read_word_data(self, i2c_addr, register):
	return [randint(0, 2**8-1)]*2

Observed

value
[185, 185]
type
<class 'list'>

Expected

value
65535
type
<class 'int'>

Testcode

import sys
import fake_rpi

sys.modules['RPi'] = fake_rpi.RPi  # Fake RPi (GPIO)
sys.modules['smbus'] = fake_rpi.smbus  # Fake smbus (I2C)

import smbus

if __name__ == "__main__":
    bus = smbus.SMBus(1)

    value = bus.read_word_data(0x01, 1 << 1)
    print("value")
    print(value)
    print("type")
    print(type(value))