kopia lustrzana https://github.com/espressif/esp-idf
120 wiersze
4.4 KiB
Python
120 wiersze
4.4 KiB
Python
# SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
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# SPDX-License-Identifier: Apache-2.0
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import queue
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import subprocess
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import sys
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import time
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import serial
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from .constants import CHECK_ALIVE_FLAG_TIMEOUT, MINIMAL_EN_LOW_DELAY, RECONNECT_DELAY, TAG_SERIAL
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from .output_helpers import red_print, yellow_print
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from .stoppable_thread import StoppableThread
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class Reader(StoppableThread):
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""" Output Reader base class """
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class SerialReader(Reader):
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""" Read serial data from the serial port and push to the
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event queue, until stopped.
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"""
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def __init__(self, serial_instance, event_queue):
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# type: (serial.Serial, queue.Queue) -> None
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super(SerialReader, self).__init__()
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self.baud = serial_instance.baudrate
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self.serial = serial_instance
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self.event_queue = event_queue
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self.gdb_exit = False
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if not hasattr(self.serial, 'cancel_read'):
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# enable timeout for checking alive flag,
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# if cancel_read not available
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self.serial.timeout = CHECK_ALIVE_FLAG_TIMEOUT
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def run(self):
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# type: () -> None
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if not self.serial.is_open:
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self.serial.baudrate = self.baud
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# We can come to this thread at startup or from external application line GDB.
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# If we come from GDB we would like to continue to run without reset.
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high = False
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low = True
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self.serial.dtr = low # Non reset state
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self.serial.rts = high # IO0=HIGH
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self.serial.dtr = self.serial.dtr # usbser.sys workaround
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# Current state not reset the target!
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self.serial.open()
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if not self.gdb_exit:
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self.serial.dtr = high # Set dtr to reset state (affected by rts)
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self.serial.rts = low # Set rts/dtr to the reset state
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self.serial.dtr = self.serial.dtr # usbser.sys workaround
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# Add a delay to meet the requirements of minimal EN low time (2ms for ESP32-C3)
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time.sleep(MINIMAL_EN_LOW_DELAY)
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self.gdb_exit = False
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self.serial.rts = high # Set rts/dtr to the working state
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self.serial.dtr = self.serial.dtr # usbser.sys workaround
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try:
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while self.alive:
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try:
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data = self.serial.read(self.serial.in_waiting or 1)
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except (serial.serialutil.SerialException, IOError) as e:
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data = b''
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# self.serial.open() was successful before, therefore, this is an issue related to
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# the disappearance of the device
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red_print(e)
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yellow_print('Waiting for the device to reconnect', newline='')
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self.serial.close()
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while self.alive: # so that exiting monitor works while waiting
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try:
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time.sleep(RECONNECT_DELAY)
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self.serial.open()
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break # device connected
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except serial.serialutil.SerialException:
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yellow_print('.', newline='')
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sys.stderr.flush()
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yellow_print('') # go to new line
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if data:
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self.event_queue.put((TAG_SERIAL, data), False)
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finally:
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self.serial.close()
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def _cancel(self):
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# type: () -> None
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if hasattr(self.serial, 'cancel_read'):
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try:
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self.serial.cancel_read()
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except Exception: # noqa
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pass
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class LinuxReader(Reader):
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""" Read data from the subprocess that runs runnable and push to the
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event queue, until stopped.
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"""
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def __init__(self, process, event_queue):
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# type: (subprocess.Popen, queue.Queue) -> None
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super().__init__()
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self.proc = process
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self.event_queue = event_queue
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self._stdout = iter(self.proc.stdout.readline, b'') # type: ignore
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def run(self): # type: () -> None
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try:
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while self.alive:
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for line in self._stdout:
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if line:
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self.event_queue.put((TAG_SERIAL, line), False)
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finally:
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self.proc.terminate()
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def _cancel(self): # type: () -> None
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self.proc.terminate()
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