mirror of
https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
synced 2025-05-06 19:49:01 +08:00
289 lines
12 KiB
Python
289 lines
12 KiB
Python
from UM.Logger import Logger
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from .avr_isp import stk500v2, ispBase
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import serial
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import threading
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import time
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import queue
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class PrinterConnection():
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def __init__(self, serial_port):
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super().__init__()
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self._serial = None
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self._serial_port = serial_port
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self._error_state = None
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self._connect_thread = threading.Thread(target = self._connect)
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self._connect_thread.daemon = True
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self._is_connected = False
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self._is_connecting = False
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self._required_responses_auto_baud = 10
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self._listen_thread = threading.Thread(target=self._listen)
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self._listen_thread.daemon = True
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self._heatup_wait_start_time = time.time()
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## Queue for commands that need to be send. Used when command is sent when a print is active.
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self._command_queue = queue.Queue()
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self._is_printing = False
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## Set when print is started in order to check running time.
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self._print_start_time = None
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self._print_start_time_100 = None
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## Keep track where in the provided g-code the print is
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self._gcode_position = 0
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self._gcode = None
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self._extruder_count = 1
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self._extruder_temperatures = [0] * self._extruder_count
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self._target_extruder_temperatures = [0] * self._extruder_count
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self._target_bed_temperature = 0
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self._bed_temperature = 0
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# In order to keep the connection alive we request the temperature every so often from a different extruder.
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# This index is the extruder we requested data from the last time.
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self._temperature_requested_extruder_index = 0
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#TODO: Might need to add check that extruders can not be changed when it started printing or loading these settings from settings object
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def setNumExtuders(self, num):
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self._extruder_count = num
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self._extruder_temperatures = [0] * self._extruder_count
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self._target_extruder_temperatures = [0] * self._extruder_count
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#TODO: Needs more logic
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def isPrinting(self):
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if not self._is_connected or self._serial is None:
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return False
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return self._is_printing
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def printGCode(self, gcode_list):
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if self.isPrinting() or not self._is_connected:
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return
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self._gcode = gcode_list
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self._gcode_position = 0
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self._print_start_time_100 = None
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self._is_printing = True
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self._print_start_time = time.time()
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for i in range(0, 4): #Push first 4 entries before accepting other inputs
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self._sendNextGcodeLine()
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def getSerialPort(self):
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return self._serial_port
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## Try to connect the serial. This simply starts the thread.
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def connect(self):
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self._connect_thread.start()
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def _connect(self):
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self._is_connecting = True
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programmer = stk500v2.Stk500v2()
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try:
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programmer.connect(self._serial_port) #Connect with the serial, if this succeeds, it's an arduino based usb device.
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self._serial = programmer.leaveISP()
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# Create new printer connection
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Logger.log('i', "Established connection on port %s" % self._serial_port)
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except ispBase.IspError as e:
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Logger.log('i', "Could not establish connection on %s: %s. Device is not arduino based." %(self._serial_port,str(e)))
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except:
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Logger.log('i', "Could not establish connection on %s, unknown reasons. Device is not arduino based." % self._serial_port)
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for baud_rate in self._getBaudrateList():
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timeout_time = time.time() + 20
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if self._serial is None:
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self._serial = serial.Serial(str(self._serial_port), baud_rate, timeout=3, writeTimeout=10000)
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else:
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if not self.setBaudRate(baud_rate):
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continue #Could not set the baud rate, go to the next
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time.sleep(1.5) #Ensure that w are not talking to the bootloader
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sucesfull_responses = 0
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self._serial.write(b"\n")
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self._sendCommand("M105")
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while timeout_time > time.time():
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line = self._readline()
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if b"T:" in line:
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self._serial.timeout = 0.5
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self._serial.write(b"\n")
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self._sendCommand("M105") # Request temperature, as this should (if baudrate is correct) result in a command with 'T:' in it
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sucesfull_responses += 1
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if sucesfull_responses >= self._required_responses_auto_baud:
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self._serial.timeout = 2
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self.setIsConnected(True)
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return
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self.setIsConnected(False)
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def setBaudRate(self, baud_rate):
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try:
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self._serial.baudrate = baud_rate
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return True
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except Exception as e:
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print(e)
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return False
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def setIsConnected(self, state):
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self._is_connecting = False
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if self._is_connected != state:
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self._is_connected = state
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else:
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Logger.log('w', "Printer connection state was not changed")
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if self._is_connected:
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self._listen_thread.start() #Start listening
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def close(self):
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if self._serial != None:
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self._serial.close()
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self.setIsConnected(False)
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self._serial = None
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def isConnected(self):
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return self._is_connected
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def _sendCommand(self, cmd):
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if self._serial is None:
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return
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if 'M109' in cmd or 'M190' in cmd:
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self._heatup_wait_start_time = time.time()
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if 'M104' in cmd or 'M109' in cmd:
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try:
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t = 0
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if 'T' in cmd:
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t = int(re.search('T([0-9]+)', cmd).group(1))
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self._target_extruder_temperatures[t] = float(re.search('S([0-9]+)', cmd).group(1))
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except:
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pass
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if 'M140' in cmd or 'M190' in cmd:
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try:
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self._target_bed_temperature = float(re.search('S([0-9]+)', cmd).group(1))
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except:
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pass
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Logger.log('i','Sending: %s' % (cmd))
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try:
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command = (cmd + '\n').encode()
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self._serial.write(command)
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except serial.SerialTimeoutException:
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Logger.log("w","Serial timeout while writing to serial port, trying again.")
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try:
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time.sleep(0.5)
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self._serial.write((cmd + '\n').encode())
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except Exception as e:
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Logger.log("e","Unexpected error while writing serial port %s " % e)
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self.close()
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except Exception as e:
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Logger.log('e',"Unexpected error while writing serial port %s" % e)
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self.close()
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def __del__(self):
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self.close()
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def sendCommand(self, cmd):
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if self.isPrinting():
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self._command_queue.put(cmd)
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elif self.isConnected():
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self._sendCommand(cmd)
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def _listen(self):
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while self._is_connected:
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line = self._readline()
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print("listening: " ,line.decode('utf-8',"replace"))
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if line is None:
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break #None is only returned when something went wrong. Stop listening
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if line.startswith(b'Error:'):
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#Oh YEAH, consistency.
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# Marlin reports an MIN/MAX temp error as "Error:x\n: Extruder switched off. MAXTEMP triggered !\n"
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# But a bed temp error is reported as "Error: Temperature heated bed switched off. MAXTEMP triggered !!"
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# So we can have an extra newline in the most common case. Awesome work people.
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if re.match(b'Error:[0-9]\n', line):
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line = line.rstrip() + self._readline()
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#Skip the communication errors, as those get corrected.
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if b'Extruder switched off' in line or b'Temperature heated bed switched off' in line or b'Something is wrong, please turn off the printer.' in line:
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if not self.hasError():
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self._error_state = line[6:]
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elif b' T:' in line or line.startswith(b'T:'): #Temperature message
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try:
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print("TEMPERATURE", float(re.search("T: *([0-9\.]*)", line).group(1)))
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self._extruder_temperatures[self._temperatureRequestExtruder] = float(re.search("T: *([0-9\.]*)", line).group(1))
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except:
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pass
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if b'B:' in line: #Check if it's a bed temperature
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try:
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print("BED TEMPERATURE" ,float(re.search("B: *([0-9\.]*)", line).group(1)))
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except:
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pass
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#TODO: temperature changed callback
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if self._is_printing:
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if b'ok' in line:
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if not self._commandQueue.empty():
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self._sendCommand(self._commandQueue.get())
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else:
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self._sendNextGcodeLine()
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else: #Request the temperature on comm timeout (every 2 seconds) when we are not printing.)
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if line == b'':
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if self._extruder_count > 0:
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self._temperature_requested_extruder_index = (self._temperature_requested_extruder_index + 1) % self._extruder_count
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self.sendCommand("M105 T%d" % self._temperature_requested_extruder_index)
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else:
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self.sendCommand("M105")
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def _sendNextGcodeLine(self):
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if self._gcode_position >= len(self._gcode_list):
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#self._changeState(self.STATE_OPERATIONAL)
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return
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if self._gcode_position == 100:
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self._print_start_time_100 = time.time()
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line = self._gcode_list[self._gcode_position]
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try:
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if line == 'M0' or line == 'M1':
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#self.setPause(True)
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line = 'M105' #Don't send the M0 or M1 to the machine, as M0 and M1 are handled as an LCD menu pause.
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if ('G0' in line or 'G1' in line) and 'Z' in line:
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z = float(re.search('Z([0-9\.]*)', line).group(1))
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if self._current_z != z:
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self._current_z = z
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except Exception as e:
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self._log("Unexpected error: %s" % e)
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checksum = reduce(lambda x,y:x^y, map(ord, "N%d%s" % (self._gcode_position, line)))
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self._sendCommand("N%d%s*%d" % (self._gcode_position, line, checksum))
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self._gcode_position += 1
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def hasError(self):
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return False
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def _readline(self):
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if self._serial is None:
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return None
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try:
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ret = self._serial.readline()
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except:
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self._log("Unexpected error while reading serial port.")
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self._errorValue = getExceptionString()
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self.close()
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return None
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#if ret == '':
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#return ''
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#self._log("Recv: %s" % (unicode(ret, 'ascii', 'replace').encode('ascii', 'replace').rstrip()))
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return ret
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## Create a list of baud rates at which we can communicate.
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# \return list of int
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def _getBaudrateList(self):
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ret = [250000, 230400, 115200, 57600, 38400, 19200, 9600]
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#if profile.getMachineSetting('serial_baud_auto') != '':
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#prev = int(profile.getMachineSetting('serial_baud_auto'))
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#if prev in ret:
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#ret.remove(prev)
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#ret.insert(0, prev)
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return ret
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