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"""
STK500v2 protocol implementation for programming AVR chips.
The STK500v2 protocol is used by the ArduinoMega2560 and a few other Arduino platforms to load firmware.
This is a python 3 conversion of the code created by David Braam for the Cura project.
"""
import struct
import sys
import time
from serial import Serial # type: ignore
from serial import SerialException
from serial import SerialTimeoutException
from UM.Logger import Logger
from . import ispBase, intelHex
class Stk500v2(ispBase.IspBase):
def __init__(self):
self.serial = None
self.seq = 1
self.last_addr = -1
self.progress_callback = None
def connect(self, port = "COM22", speed = 115200):
if self.serial is not None:
self.close()
try:
self.serial = Serial(str(port), speed, timeout=1, writeTimeout=10000)
except SerialException:
raise ispBase.IspError("Failed to open serial port")
except:
raise ispBase.IspError("Unexpected error while connecting to serial port:" + port + ":" + str(sys.exc_info()[0]))
self.seq = 1
#Reset the controller
for n in range(0, 2):
self.serial.setDTR(True)
time.sleep(0.1)
self.serial.setDTR(False)
time.sleep(0.1)
time.sleep(0.2)
self.serial.flushInput()
self.serial.flushOutput()
try:
if self.sendMessage([0x10, 0xc8, 0x64, 0x19, 0x20, 0x00, 0x53, 0x03, 0xac, 0x53, 0x00, 0x00]) != [0x10, 0x00]:
raise ispBase.IspError("Failed to enter programming mode")
self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
if self.sendMessage([0xEE])[1] == 0x00:
self._has_checksum = True
else:
self._has_checksum = False
except ispBase.IspError:
self.close()
raise
self.serial.timeout = 5
def close(self):
if self.serial is not None:
self.serial.close()
self.serial = None
#Leave ISP does not reset the serial port, only resets the device, and returns the serial port after disconnecting it from the programming interface.
# This allows you to use the serial port without opening it again.
def leaveISP(self):
if self.serial is not None:
if self.sendMessage([0x11]) != [0x11, 0x00]:
raise ispBase.IspError("Failed to leave programming mode")
ret = self.serial
self.serial = None
return ret
return None
def isConnected(self):
return self.serial is not None
def hasChecksumFunction(self):
return self._has_checksum
def sendISP(self, data):
recv = self.sendMessage([0x1D, 4, 4, 0, data[0], data[1], data[2], data[3]])
return recv[2:6]
def writeFlash(self, flash_data):
#Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
page_size = self.chip["pageSize"] * 2
flash_size = page_size * self.chip["pageCount"]
Logger.log("d", "Writing flash")
if flash_size > 0xFFFF:
self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
else:
self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
load_count = (len(flash_data) + page_size - 1) / page_size
for i in range(0, int(load_count)):
self.sendMessage([0x13, page_size >> 8, page_size & 0xFF, 0xc1, 0x0a, 0x40, 0x4c, 0x20, 0x00, 0x00] + flash_data[(i * page_size):(i * page_size + page_size)])
if self.progress_callback is not None:
if self._has_checksum:
self.progress_callback(i + 1, load_count)
else:
self.progress_callback(i + 1, load_count * 2)
def verifyFlash(self, flash_data):
if self._has_checksum:
self.sendMessage([0x06, 0x00, (len(flash_data) >> 17) & 0xFF, (len(flash_data) >> 9) & 0xFF, (len(flash_data) >> 1) & 0xFF])
res = self.sendMessage([0xEE])
checksum_recv = res[2] | (res[3] << 8)
checksum = 0
for d in flash_data:
checksum += d
checksum &= 0xFFFF
if hex(checksum) != hex(checksum_recv):
raise ispBase.IspError("Verify checksum mismatch: 0x%x != 0x%x" % (checksum & 0xFFFF, checksum_recv))
else:
#Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
flash_size = self.chip["pageSize"] * 2 * self.chip["pageCount"]
if flash_size > 0xFFFF:
self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
else:
self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
load_count = (len(flash_data) + 0xFF) / 0x100
for i in range(0, int(load_count)):
recv = self.sendMessage([0x14, 0x01, 0x00, 0x20])[2:0x102]
if self.progress_callback is not None:
self.progress_callback(load_count + i + 1, load_count * 2)
for j in range(0, 0x100):
if i * 0x100 + j < len(flash_data) and flash_data[i * 0x100 + j] != recv[j]:
raise ispBase.IspError("Verify error at: 0x%x" % (i * 0x100 + j))
def sendMessage(self, data):
message = struct.pack(">BBHB", 0x1B, self.seq, len(data), 0x0E)
for c in data:
message += struct.pack(">B", c)
checksum = 0
for c in message:
checksum ^= c
message += struct.pack(">B", checksum)
try:
self.serial.write(message)
self.serial.flush()
except SerialTimeoutException:
raise ispBase.IspError("Serial send timeout")
self.seq = (self.seq + 1) & 0xFF
return self.recvMessage()
def recvMessage(self):
state = "Start"
checksum = 0
while True:
s = self.serial.read()
if len(s) < 1:
raise ispBase.IspError("Timeout")
b = struct.unpack(">B", s)[0]
checksum ^= b
if state == "Start":
if b == 0x1B:
state = "GetSeq"
checksum = 0x1B
elif state == "GetSeq":
state = "MsgSize1"
elif state == "MsgSize1":
msg_size = b << 8
state = "MsgSize2"
elif state == "MsgSize2":
msg_size |= b
state = "Token"
elif state == "Token":
if b != 0x0E:
state = "Start"
else:
state = "Data"
data = []
elif state == "Data":
data.append(b)
if len(data) == msg_size:
state = "Checksum"
elif state == "Checksum":
if checksum != 0:
state = "Start"
else:
return data
def portList():
ret = []
import _winreg # type: ignore
key=_winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE,"HARDWARE\\DEVICEMAP\\SERIALCOMM") #@UndefinedVariable
i=0
while True:
try:
values = _winreg.EnumValue(key, i) #@UndefinedVariable
except:
return ret
if "USBSER" in values[0]:
ret.append(values[1])
i+=1
return ret
def runProgrammer(port, filename):
""" Run an STK500v2 program on serial port 'port' and write 'filename' into flash. """
programmer = Stk500v2()
programmer.connect(port = port)
programmer.programChip(intelHex.readHex(filename))
programmer.close()
def main():
""" Entry point to call the stk500v2 programmer from the commandline. """
import threading
if sys.argv[1] == "AUTO":
Logger.log("d", "portList(): ", repr(portList()))
for port in portList():
threading.Thread(target=runProgrammer, args=(port,sys.argv[2])).start()
time.sleep(5)
else:
programmer = Stk500v2()
programmer.connect(port = sys.argv[1])
programmer.programChip(intelHex.readHex(sys.argv[2]))
sys.exit(1)
if __name__ == "__main__":
main()
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