1 __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
2 import os, struct, sys, time
4 from serial import Serial
5 from serial import SerialException
7 import ispBase, intelHex
9 class Stk500v2(ispBase.IspBase):
14 self.progressCallback = None
16 def connect(self, port = 'COM22', speed = 115200):
17 if self.serial != None:
20 self.serial = Serial(str(port), speed, timeout=1, writeTimeout=10000)
21 except SerialException as e:
22 raise ispBase.IspError("Failed to open serial port")
24 raise ispBase.IspError("Unexpected error while connecting to serial port:" + port + ":" + str(sys.exc_info()[0]))
34 if self.sendMessage([0x10, 0xc8, 0x64, 0x19, 0x20, 0x00, 0x53, 0x03, 0xac, 0x53, 0x00, 0x00]) != [0x10, 0x00]:
36 raise ispBase.IspError("Failed to enter programming mode")
37 self.serial.timeout = 5
40 if self.serial != None:
44 #Leave ISP does not reset the serial port, only resets the device, and returns the serial port after disconnecting it from the programming interface.
45 # This allows you to use the serial port without opening it again.
47 if self.serial != None:
48 if self.sendMessage([0x11]) != [0x11, 0x00]:
49 raise ispBase.IspError("Failed to leave programming mode")
55 def isConnected(self):
56 return self.serial != None
58 def sendISP(self, data):
59 recv = self.sendMessage([0x1D, 4, 4, 0, data[0], data[1], data[2], data[3]])
62 def writeFlash(self, flashData):
63 #Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
64 pageSize = self.chip['pageSize'] * 2
65 flashSize = pageSize * self.chip['pageCount']
66 if flashSize > 0xFFFF:
67 self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
69 self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
71 loadCount = (len(flashData) + pageSize - 1) / pageSize
72 for i in xrange(0, loadCount):
73 recv = self.sendMessage([0x13, pageSize >> 8, pageSize & 0xFF, 0xc1, 0x0a, 0x40, 0x4c, 0x20, 0x00, 0x00] + flashData[(i * pageSize):(i * pageSize + pageSize)])
74 if self.progressCallback != None:
75 self.progressCallback(i + 1, loadCount*2)
77 def verifyFlash(self, flashData):
78 #Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
79 flashSize = self.chip['pageSize'] * 2 * self.chip['pageCount']
80 if flashSize > 0xFFFF:
81 self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
83 self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
85 loadCount = (len(flashData) + 0xFF) / 0x100
86 for i in xrange(0, loadCount):
87 recv = self.sendMessage([0x14, 0x01, 0x00, 0x20])[2:0x102]
88 if self.progressCallback != None:
89 self.progressCallback(loadCount + i + 1, loadCount*2)
90 for j in xrange(0, 0x100):
91 if i * 0x100 + j < len(flashData) and flashData[i * 0x100 + j] != recv[j]:
92 raise ispBase.IspError('Verify error at: 0x%x' % (i * 0x100 + j))
94 def sendMessage(self, data):
95 message = struct.pack(">BBHB", 0x1B, self.seq, len(data), 0x0E)
97 message += struct.pack(">B", c)
101 message += struct.pack(">B", checksum)
103 self.serial.write(message)
105 except Serial.SerialTimeoutException:
106 raise ispBase.IspError('Serial send timeout')
107 self.seq = (self.seq + 1) & 0xFF
108 return self.recvMessage()
110 def recvMessage(self):
114 s = self.serial.read()
116 raise ispBase.IspError("Timeout")
117 b = struct.unpack(">B", s)[0]
124 elif state == 'GetSeq':
126 elif state == 'MsgSize1':
129 elif state == 'MsgSize2':
132 elif state == 'Token':
138 elif state == 'Data':
140 if len(data) == msgSize:
142 elif state == 'Checksum':
150 programmer = Stk500v2()
151 programmer.connect(port = sys.argv[1])
152 programmer.programChip(intelHex.readHex(sys.argv[2]))
155 if __name__ == '__main__':