frprog.py

   1 #!/usr/bin/env python
   2 import sys, time
   3 from SerialPort_linux import *
   4
   5 # serial device to communicate with
   6 DEVICE="/dev/ttyUSB0"
   7 # baudrate used for initialization
   8 INIT_BAUDRATE=9600
   9 # baudrate used for communication after init
  10 REAL_BAUDRATE=38400
  11
  12 # contains the last received checksum from a READ, WRITE or CHECKSUM command
  13 last_checksum = 0
  14
  15 def sendByte(byte):
  16         time.sleep(0.001) # just to get sure, wait 1ms
  17         tty.write(chr(byte))
  18         tty.flush()
  19
  20 def sendWord(word):
  21         sendByte(word & 0xFF)
  22         sendByte((word >> 8) & 0xFF)
  23
  24 def sendDWord(dword):
  25         sendByte(dword & 0xFF)
  26         sendByte((dword >> 8) & 0xFF)
  27         sendByte((dword >> 16) & 0xFF)
  28         sendByte((dword >> 24) & 0xFF)
  29
  30 def recvByte():
  31         return ord(tty.read())
  32
  33 def recvChecksum():
  34         global last_checksum
  35         last_checksum = recvByte()
  36         last_checksum |= (recvByte() << 8)
  37
  38 def cmdREAD(address, size):
  39         # send READ command
  40         sendByte(0x01)
  41         if (recvByte() != 0xF1):
  42                 raise Exception
  43         sendByte(0x02)
  44         if (recvByte() != 0x82):
  45                 raise Exception
  46         # tell desired address and size
  47         sendDWord(address)
  48         sendWord(size)
  49         # get binary stream of data
  50         data = []
  51         for i in range(0, size):
  52                 data.append(recvByte())
  53         # get checksum
  54         recvChecksum()
  55         return data
  56
  57 def cmdWRITE(address, size, data):
  58         # send WRITE command
  59         sendByte(0x01)
  60         if (recvByte() != 0xF1):
  61                 raise Exception
  62         sendByte(0x03)
  63         if (recvByte() != 0x83):
  64                 raise Exception
  65         # tell desired address and size
  66         sendDWord(address)
  67         sendWord(size)
  68         # write binary stream of data
  69         for i in range(0, size):
  70                 sendByte(data[i])
  71         # get checksum
  72         recvChecksum()
  73
  74 # TODO: test this function!
  75 def cmdCALL(address):
  76         # send CALL command
  77         sendByte(0x01)
  78         if (recvByte() != 0xF1):
  79                 raise Exception
  80         sendByte(0x04)
  81         if (recvByte() != 0x84):
  82                 raise Exception
  83         # tell desired address
  84         sendDWord(address)
  85         # wait for return parameter - not needed here!
  86         #return recvByte()
  87
  88 # TODO: test this function!
  89 def cmdCHECKSUM():
  90         # call CHECKSUM command
  91         sendByte(0x01)
  92         if (recvByte() != 0xF1):
  93                 raise Exception
  94         sendByte(0x05)
  95         if (recvByte() != 0x84):
  96                 raise Exception
  97         # get checksum
  98         recvChecksum()
  99
 100 def cmdBAUDRATE(baudrate):
 101         global last_checksum
 102
 103         # send BAUDRATE command
 104         sendByte(0x01)
 105         if (recvByte() != 0xF1):
 106                 raise Exception
 107         sendByte(0x06)
 108         if (recvByte() != 0x86):
 109                 raise Exception
 110         # send desired baudrate
 111         sendByte(baudrate & 0xFF)
 112         sendByte((baudrate >> 8) & 0xFF)
 113         sendByte((baudrate >> 16) & 0xFF)
 114         sendByte((baudrate >> 24) & 0xFF)
 115
 116 class FlashSequence(object):
 117         def __init__(self, address, data):
 118                 self.address = address
 119                 self.data = data
 120
 121 flashseqs = []
 122
 123 # check command line arguments
 124 if len(sys.argv) != 2:
 125         print "Usage: " + sys.argv[0] + " [mhx-file]"
 126         sys.exit(1)
 127
 128 # read in data from mhx-file before starting
 129 try:
 130         fp = open(sys.argv[1], "r")
 131 except IOError:
 132         print sys.argv[0] + ": Error - couldn't open file " + sys.argv[1] + "!"
 133         sys.exit(1)
 134
 135 linecount = 0
 136 for line in fp:
 137         linecount += 1
 138         # get rid of newline characters
 139         line = line.strip()
 140
 141         # we're only interested in S2 (data sequence with 3 address bytes) records by now
 142         if line[0:2] == "S2":
 143                 byte_count = int(line[2:4], 16)
 144                 # just to get sure, check if byte count field is valid
 145                 if (len(line)-4) != (byte_count*2):
 146                         print sys.argv[0] + ": Warning - inavlid byte count field in " + \
 147                                 sys.argv[1] + ":" + str(linecount) + ", skipping line!"
 148                         continue
 149
 150                 # address and checksum bytes are not needed
 151                 byte_count -= 4
 152                 address = int(line[4:10], 16)
 153                 datastr = line[10:10+byte_count*2]
 154
 155                 # convert data hex-byte-string to real byte data list
 156                 data = []
 157                 for i in range(0, len(datastr)/2):
 158                         data.append(int(datastr[2*i:2*i+2], 16))
 159
 160                 # add flash sequence to our list
 161                 flashseqs.append(FlashSequence(address, data))
 162
 163 print "The following flash sequences have been read in:"
 164 for seq in flashseqs:
 165         print hex(seq.address) + ":", seq.data
 166
 167 print "Initializing serial port..."
 168 tty = SerialPort(DEVICE, 100, INIT_BAUDRATE)
 169
 170 print "Please press RESET on your 1337 board..."
 171
 172 while 1:
 173         tty.write('V')
 174         tty.flush()
 175         try:
 176                 if tty.read() == 'F':
 177                         break
 178         except SerialPortException:
 179                 # timeout happened, who cares ;-)
 180                 pass
 181
 182 print "OK, trying to set baudrate..."
 183 # set baudrate
 184 cmdBAUDRATE(REAL_BAUDRATE)
 185 tty = SerialPort(DEVICE, 100, REAL_BAUDRATE)
 186
 187
 188 """
 189 # execute (existing) program in ram
 190 cmdCALL(0x00033ffc)
 191 sys.exit(0)
 192 """
 193
 194 # read something from the IRAM
 195 #print cmdREAD(0x00030000, 32)
 196
 197 #data = []
 198 #for i in range(0, 32):
 199 #       data.append(i)
 200 #cmdWRITE(0x00030000, 32, data)
 201
 202
 203 """
 204 # write something to the begin of the IRAM
 205 data_wr = []
 206 checksum = 0
 207 for i in range(0, 0x400):
 208         value = i%256
 209         data_wr.append(value)
 210         checksum = (checksum + value) % (2**16)
 211
 212 print "Calculated checksum:", checksum
 213 print "Writing", data_wr, "to the IRAM..."
 214 cmdWRITE(0x00030000, len(data_wr), data_wr)
 215 print "Received Checksum:", last_checksum
 216 print
 217
 218 print "Reading from the IRAM again..."
 219 data_re = cmdREAD(0x00030000, len(data_wr))
 220 print "Received data:", data_re, "Checksum:", last_checksum
 221 """
 222
 223 """
 224 # see whats in the iram at the moment
 225 data_wr = []
 226 print "Reading from the IRAM..."
 227 data_re = cmdREAD(0x00030000, 0x10000-4)
 228 print "Received data:", data_re, "Checksum:", last_checksum
 229 """
 230
 231 """
 232 # see whats in the dram at the moment
 233 data_wr = []
 234 print "Reading from the DRAM..."
 235 data_re = cmdREAD(0x0002C000, 0x10000-0xC000-4)
 236 print "Received data:", data_re, "Checksum:", last_checksum
 237 """
 238
 239 """
 240 # blank the iram
 241 data_wr = []
 242 for i in range(0, 0x10000-4):
 243         value = 0
 244         data_wr.append(value)
 245
 246 print "Writing", data_wr, "to the IRAM..."
 247 cmdWRITE(0x00030000, len(data_wr), data_wr)
 248 print "Received Checksum:", last_checksum
 249 print
 250 """
 251
 252 """
 253 # blank the dram
 254 data_wr = []
 255 for i in range(0, 0x10000-0xC000-4):
 256         value = 0
 257         data_wr.append(value)
 258
 259 print "Writing", data_wr, "to the DRAM..."
 260 cmdWRITE(0x0002C000, len(data_wr), data_wr)
 261 print "Received Checksum:", last_checksum
 262 print
 263 """
 264
 265
 266 # write some data in the iram and try to execute it
 267 data_wr =[
 268                 0x9B,0x00,
 269                 0x0D,0x4e,
 270                 0xcf,0xf1,
 271                 0x16,0x01,
 272                 0x9b,0x05,
 273                 0x04,0xc7,
 274                 0xc1,0x06,
 275                 0x16,0x56,
 276                 0xe0,0xfb, #branch
 277                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, #nop
 278                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 279                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 280                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 281                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 282                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 283                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0]
 284 print "Writing", data_wr, "to the IRAM..."
 285 cmdWRITE(0x00030000, len(data_wr), data_wr)
 286 print "Received Checksum:", last_checksum
 287 print
 288 cmdCALL(0x00030000)