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Create if_lib package containing all the modules and adapt the *.py files to import each other using the intra-package references. The idea behind a package is to invoke test.py either by permanently modifying PYTHONPATH in user profile via adding path to $RIOTBASE/dist/tests or make temporary PYTHONPATH changes during the invocation: PYTHONPATH=$PYTHONPATH:$RIOTBASE/dist/tests python3 test.py Leave periph_i2c_if.py in the same folder as test.py as this file is just a Python wrapper around periph specific main.c. Update BPT memory map. Use definitions generated with the latest code generator. Both routine names and mapping have changed. Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
109 lines
3.5 KiB
Python
109 lines
3.5 KiB
Python
# Copyright (C) 2018 Kevin Weiss <kevin.weiss@haw-hamburg.de>
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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"""@package PyToAPI
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This module handles generic connection and IO to the serial driver.
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"""
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import logging
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import time
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import serial
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import serial.tools.list_ports
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class SerialDriver:
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"""Contains all reusable functions for connecting, sending and recieveing
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data.
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"""
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DEFAULT_TIMEOUT = 1
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DEFAULT_BAUDRATE = 115200
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DEFAULT_PORT = '/dev/ttyACM0'
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used_devices = []
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def __init__(self, *args, **kwargs):
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if 'timeout' not in kwargs:
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kwargs['timeout'] = self.DEFAULT_TIMEOUT
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if len(args) < 2:
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if 'baudrate' not in kwargs:
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kwargs['baudrate'] = self.DEFAULT_BAUDRATE
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if len(args) == 0:
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if 'port' not in kwargs:
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kwargs['port'] = self.DEFAULT_PORT
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logging.debug("Serial connection args %r -- %r", args, kwargs)
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try:
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self._dev = serial.Serial(*args, **kwargs)
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except serial.SerialException:
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self._dev = serial.serial_for_url(*args, **kwargs)
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SerialDriver.used_devices.append(self._dev.port)
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time.sleep(0.1)
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# A time delay is needed ensure everything is flushed correctly
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self._dev.reset_input_buffer()
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self._dev.reset_output_buffer()
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def close(self):
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"""Close serial connection."""
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logging.debug("Closing %s", self._dev.port)
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SerialDriver.used_devices.remove(self._dev.port)
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self._dev.close()
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def read(self):
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"""Read and decode data."""
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try:
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res_bytes = self._dev.readline()
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response = res_bytes.decode("utf-8", errors="replace")
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except Exception as exc:
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response = 'ERR'
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logging.debug(exc)
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logging.debug("Response: %s", response.replace('\n', ''))
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return response
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def write(self, data):
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"""Tries write data."""
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logging.debug("Sending: " + data)
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self._dev.write((data + '\n').encode('utf-8'))
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@staticmethod
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def get_configs(baudrate=DEFAULT_BAUDRATE, timeout=1):
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"""Gets available serial configurations."""
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portlist = serial.tools.list_ports.comports()
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available_configs = []
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for element in portlist:
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if element.device not in SerialDriver.used_devices:
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available_configs.append({'port': element.device,
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'baudrate': baudrate,
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'timeout': timeout})
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logging.debug("Ports available: %r", available_configs)
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return available_configs
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def main():
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"""Tests basic usage of the class
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Used for unit testing, information should be confirm with DEBUG info.
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"""
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logging.getLogger().setLevel(logging.DEBUG)
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SerialDriver.get_configs()
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ddif = SerialDriver()
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ddif.close()
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ddif = SerialDriver(port='/dev/ttyACM0')
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logging.debug("Used devices: %r", ddif.used_devices)
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ddif.close()
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ddif = SerialDriver(port='/dev/ttyACM0', baudrate=115200)
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logging.debug("Used devices: %r", ddif.used_devices)
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ddif.close()
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ddif = SerialDriver(port='/dev/ttyACM0', baudrate=115200, timeout=1)
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logging.debug("Used devices: %r", ddif.used_devices)
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ddif.close()
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logging.debug("Used devices: %r", ddif.used_devices)
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if __name__ == "__main__":
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main()
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