diff options
Diffstat (limited to 'klippy/serialhdl.py')
| -rw-r--r-- | klippy/serialhdl.py | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/klippy/serialhdl.py b/klippy/serialhdl.py index bc8a9d3c..46e31ed4 100644 --- a/klippy/serialhdl.py +++ b/klippy/serialhdl.py @@ -13,12 +13,13 @@ class error(Exception): class SerialReader: BITS_PER_BYTE = 10. - def __init__(self, reactor, serialport, baud): + def __init__(self, reactor, serialport, baud, rts=True): self.reactor = reactor self.serialport = serialport self.baud = baud # Serial port self.ser = None + self.rts = rts self.msgparser = msgproto.MessageParser() # C interface self.ffi_main, self.ffi_lib = chelper.get_ffi() @@ -85,7 +86,10 @@ class SerialReader: try: if self.baud: self.ser = serial.Serial( - self.serialport, self.baud, timeout=0, exclusive=True) + baudrate=self.baud, timeout=0, exclusive=True) + self.ser.port = self.serialport + self.ser.rts = self.rts + self.ser.open() else: self.ser = open(self.serialport, 'rb+') except (OSError, IOError, serial.SerialException) as e: @@ -266,6 +270,32 @@ def stk500v2_leave(ser, reactor): logging.debug("Got %s from stk500v2", repr(res)) ser.baudrate = origbaud +def cheetah_reset(serialport, reactor): + # Fysetc Cheetah v1.2 boards have a weird stateful circuitry for + # configuring the bootloader. This sequence takes care of disabling it for + # sure. + # Open the serial port with RTS asserted + ser = serial.Serial(baudrate=2400, timeout=0, exclusive=True) + ser.port = serialport + ser.rts = True + ser.open() + ser.read(1) + reactor.pause(reactor.monotonic() + 0.100) + # Toggle DTR + ser.dtr = True + reactor.pause(reactor.monotonic() + 0.100) + ser.dtr = False + # Deassert RTS + reactor.pause(reactor.monotonic() + 0.100) + ser.rts = False + reactor.pause(reactor.monotonic() + 0.100) + # Toggle DTR again + ser.dtr = True + reactor.pause(reactor.monotonic() + 0.100) + ser.dtr = False + reactor.pause(reactor.monotonic() + 0.100) + ser.close() + # Attempt an arduino style reset on a serial port def arduino_reset(serialport, reactor): # First try opening the port at a different baud |