155 lines
4.5 KiB
Python
155 lines
4.5 KiB
Python
import os, struct, sys, time
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from serial import Serial
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from serial import SerialException
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import ispBase, intelHex
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class Stk500v2(ispBase.IspBase):
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def __init__(self):
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self.serial = None
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self.seq = 1
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self.lastAddr = -1
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self.progressCallback = None
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def connect(self, port = 'COM22', speed = 115200):
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if self.serial != None:
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self.close()
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try:
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self.serial = Serial(str(port), speed, timeout=1, writeTimeout=10000)
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except SerialException as e:
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raise ispBase.IspError("Failed to open serial port")
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except:
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raise ispBase.IspError("Unexpected error while connecting to serial port:" + port + ":" + str(sys.exc_info()[0]))
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self.seq = 1
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#Reset the controller
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self.serial.setDTR(1)
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time.sleep(0.1)
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self.serial.setDTR(0)
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time.sleep(0.2)
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self.sendMessage([1])
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if self.sendMessage([0x10, 0xc8, 0x64, 0x19, 0x20, 0x00, 0x53, 0x03, 0xac, 0x53, 0x00, 0x00]) != [0x10, 0x00]:
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self.close()
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raise ispBase.IspError("Failed to enter programming mode")
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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.serial = None
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#Leave ISP does not reset the serial port, only resets the device, and returns the serial port after disconnecting it from the programming interface.
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# This allows you to use the serial port without opening it again.
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def leaveISP(self):
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if self.serial != None:
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if self.sendMessage([0x11]) != [0x11, 0x00]:
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raise ispBase.IspError("Failed to leave programming mode")
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ret = self.serial
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self.serial = None
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return ret
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return None
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def isConnected(self):
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return self.serial != None
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def sendISP(self, data):
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recv = self.sendMessage([0x1D, 4, 4, 0, data[0], data[1], data[2], data[3]])
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return recv[2:6]
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def writeFlash(self, flashData):
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#Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
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pageSize = self.chip['pageSize'] * 2
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flashSize = pageSize * self.chip['pageCount']
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if flashSize > 0xFFFF:
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self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
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else:
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self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
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loadCount = (len(flashData) + pageSize - 1) / pageSize
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for i in xrange(0, loadCount):
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recv = self.sendMessage([0x13, pageSize >> 8, pageSize & 0xFF, 0xc1, 0x0a, 0x40, 0x4c, 0x20, 0x00, 0x00] + flashData[(i * pageSize):(i * pageSize + pageSize)])
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if self.progressCallback != None:
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self.progressCallback(i + 1, loadCount*2)
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def verifyFlash(self, flashData):
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#Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
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flashSize = self.chip['pageSize'] * 2 * self.chip['pageCount']
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if flashSize > 0xFFFF:
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self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
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else:
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self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
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loadCount = (len(flashData) + 0xFF) / 0x100
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for i in xrange(0, loadCount):
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recv = self.sendMessage([0x14, 0x01, 0x00, 0x20])[2:0x102]
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if self.progressCallback != None:
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self.progressCallback(loadCount + i + 1, loadCount*2)
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for j in xrange(0, 0x100):
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if i * 0x100 + j < len(flashData) and flashData[i * 0x100 + j] != recv[j]:
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raise ispBase.IspError('Verify error at: 0x%x' % (i * 0x100 + j))
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def sendMessage(self, data):
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message = struct.pack(">BBHB", 0x1B, self.seq, len(data), 0x0E)
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for c in data:
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message += struct.pack(">B", c)
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checksum = 0
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for c in message:
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checksum ^= ord(c)
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message += struct.pack(">B", checksum)
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try:
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self.serial.write(message)
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self.serial.flush()
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except SerialTimeoutException:
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raise ispBase.IspError('Serial send timeout')
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self.seq = (self.seq + 1) & 0xFF
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return self.recvMessage()
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def recvMessage(self):
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state = 'Start'
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checksum = 0
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while True:
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s = self.serial.read()
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if len(s) < 1:
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raise ispBase.IspError("Timeout")
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b = struct.unpack(">B", s)[0]
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checksum ^= b
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#print(hex(b))
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if state == 'Start':
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if b == 0x1B:
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state = 'GetSeq'
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checksum = 0x1B
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elif state == 'GetSeq':
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state = 'MsgSize1'
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elif state == 'MsgSize1':
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msgSize = b << 8
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state = 'MsgSize2'
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elif state == 'MsgSize2':
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msgSize |= b
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state = 'Token'
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elif state == 'Token':
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if b != 0x0E:
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state = 'Start'
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else:
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state = 'Data'
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data = []
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elif state == 'Data':
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data.append(b)
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if len(data) == msgSize:
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state = 'Checksum'
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elif state == 'Checksum':
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if checksum != 0:
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state = 'Start'
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else:
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return data
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def main():
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programmer = Stk500v2()
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programmer.connect(port = sys.argv[1])
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programmer.programChip(intelHex.readHex(sys.argv[2]))
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sys.exit(1)
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if __name__ == '__main__':
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main()
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