#!/usr/bin/env python
-import sys, time
-from SerialPort_linux import *
+import sys, time, pyftdi
# serial device to communicate with
-DEVICE="/dev/ttyUSB0"
+DEVICE1=0x0403
+DEVICE2=0x6001
# baudrate used for initialization
INIT_BAUDRATE=9600
-# baudrate used for communication after init
-REAL_BAUDRATE=38400
+# baudrate used for communication with the internal bootloader after init
+BOOTLOADER_BAUDRATE=38400
+# baudrate used for communication with the pkernel program that does the flashing eventually
+KERNEL_BAUDRATE=1000000
# contains the last received checksum from a READ, WRITE or CHECKSUM command
last_checksum = 0
+class FlashSequence(object):
+ def __init__(self, address, data):
+ self.address = address
+ self.data = data
+
def sendByte(byte):
- time.sleep(0.001) # just to get sure, wait 1ms
- tty.write(chr(byte))
- tty.flush()
+ tty.write_data(chr(byte))
def sendWord(word):
sendByte(word & 0xFF)
sendByte((dword >> 24) & 0xFF)
def recvByte():
- return ord(tty.read())
+ bla = tty.read_data(1)
+ while(len(bla) < 1):
+ bla = tty.read_data(1)
+ return ord(bla)
def recvChecksum():
global last_checksum
last_checksum = recvByte()
last_checksum |= (recvByte() << 8)
-def cmdREAD(address, size):
+def bootromREAD(address, size):
# send READ command
sendByte(0x01)
if (recvByte() != 0xF1):
recvChecksum()
return data
-def cmdWRITE(address, size, data):
+def bootromWRITE(address, size, data):
# send WRITE command
sendByte(0x01)
if (recvByte() != 0xF1):
recvChecksum()
# TODO: test this function!
-def cmdCALL(address):
+def bootromCALL(address):
# send CALL command
sendByte(0x01)
if (recvByte() != 0xF1):
#return recvByte()
# TODO: test this function!
-def cmdCHECKSUM():
+def bootromCHECKSUM():
# call CHECKSUM command
sendByte(0x01)
if (recvByte() != 0xF1):
# get checksum
recvChecksum()
-def cmdBAUDRATE(baudrate):
- global last_checksum
-
+def bootromBAUDRATE(baudrate):
# send BAUDRATE command
sendByte(0x01)
if (recvByte() != 0xF1):
if (recvByte() != 0x86):
raise Exception
# send desired baudrate
- sendByte(baudrate & 0xFF)
- sendByte((baudrate >> 8) & 0xFF)
- sendByte((baudrate >> 16) & 0xFF)
- sendByte((baudrate >> 24) & 0xFF)
-
-print "Initializing serial port..."
-tty = SerialPort(DEVICE, 100, INIT_BAUDRATE)
-
-print "Please press RESET on your 1337 board..."
-
-while 1:
- tty.write('V')
- tty.flush()
- try:
- if tty.read() == 'F':
- break
- except SerialPortException:
- # timeout happened, who cares ;-)
- pass
-
-print "OK, trying to set baudrate..."
-
-# set baudrate
-cmdBAUDRATE(REAL_BAUDRATE)
-tty = SerialPort(DEVICE, 100, REAL_BAUDRATE)
-"""
-print
-sendByte(0x01)
-print recvByte()
-sendByte(0x02)
-print recvByte()
-sys.exit(0)
-"""
-
-#cmdCALL(0x00030000)
-cmdCALL(0x00033ffc)
-sys.exit(0)
-
-# read something from the IRAM
-#print cmdREAD(0x00030000, 32)
-
-#data = []
-#for i in range(0, 32):
-# data.append(i)
-#cmdWRITE(0x00030000, 32, data)
-
-
-# write something to the begin of the IRAM
-data_wr = []
-checksum = 0
-for i in range(0, 0x400):
- value = i%256
- data_wr.append(value)
- checksum = (checksum + value) % (2**16)
-
-print "Calculated checksum:", checksum
-print "Writing", data_wr, "to the IRAM..."
-cmdWRITE(0x00030000, len(data_wr), data_wr)
-print "Received Checksum:", last_checksum
-print
-
-print "Reading from the IRAM again..."
-data_re = cmdREAD(0x00030000, len(data_wr))
-print "Received data:", data_re, "Checksum:", last_checksum
+ sendDWord(baudrate)
+
+def pkernCHIPERASE():
+ sendByte(0x15)
+ if (recvByte() != 0x45):
+ raise Exception
+ # wait till completion...
+ if (recvByte() != 0x23):
+ raise Exception
+
+def pkernERASE(address, size):
+ sendByte(0x12)
+ if (recvByte() != 0x11):
+ raise Exception
+ sendDWord(address)
+ sendWord(size)
+ if (recvByte() != 0x18):
+ raise Exception
+
+def pkernWRITE(address, size, data):
+ # send WRITE command
+ sendByte(0x13)
+ if (recvByte() != 0x37):
+ raise Exception
+ # tell desired address and size
+ sendDWord(address)
+ sendWord(size)
+
+ # write binary stream of data
+ for i in range(0, size):
+ sendByte(data[i])
+
+ if (recvByte() != 0x28):
+ raise Exception
+
+def readMHXFile(filename): # desired mhx filename
+ fp = open(filename, "r")
+ retval = [] # returns a list of FlashSequence objects
+ linecount = 0
+ for line in fp:
+ linecount += 1
+ # get rid of newline characters
+ line = line.strip()
+
+ # we're only interested in S2 (data sequence with 3 address bytes) records by now
+ if line[0:2] == "S2":
+ byte_count = int(line[2:4], 16)
+ # just to get sure, check if byte count field is valid
+ if (len(line)-4) != (byte_count*2):
+ print sys.argv[0] + ": Warning - inavlid byte count field in " + \
+ sys.argv[1] + ":" + str(linecount) + ", skipping line!"
+ continue
+
+ # address and checksum bytes are not needed
+ byte_count -= 4
+ address = int(line[4:10], 16)
+ datastr = line[10:10+byte_count*2]
+
+ # convert data hex-byte-string to real byte data list
+ data = []
+ for i in range(0, len(datastr)/2):
+ data.append(int(datastr[2*i:2*i+2], 16))
+
+ # add flash sequence to our list
+ retval.append(FlashSequence(address, data))
+ fp.close()
+ return retval
+
+def main(argv=None):
+ # check command line arguments
+ if argv is None:
+ argv = sys.argv
+ if len(argv) != 2:
+ print "Usage: " + argv[0] + " [target mhx-file]"
+ return 1
+
+ # read in data from mhx-files before starting
+ try:
+ try:
+ bootloaderseqs = readMHXFile("pkernel/pkernel.mhx")
+ except IOError as error1:
+ bootloaderseqs = readMHXFile("%PREFIX%/share/frprog/pkernel.mhx")
+ pkernelseqs = readMHXFile(argv[1])
+ except IOError as error:
+ print argv[0] + ": Error - couldn't open file " + error.filename + "!"
+ return 1
+
+ print "Initializing serial port..."
+ global tty
+ tty = pyftdi.FTDI()
+ tty.usb_open(DEVICE1, DEVICE2)
+ tty.set_baudrate(INIT_BAUDRATE)
+ #tty.set_latency_timer(100)
+ #print "latency:", tty.get_latency_timer()
+
+ print "Please press RESET on your board..."
+
+ while True:
+ tty.write_data('V')
+ try:
+ if tty.read_data(1) == 'F':
+ break
+ except Exception: # hm... thats not true atm :/ no timeout here i think
+ # timeout happened, who cares ;-)
+ pass
+
+ starttime = time.time() # save time at this point for evaluating the duration at the end
+
+ print "OK, trying to set baudrate..."
+ # set baudrate
+ bootromBAUDRATE(BOOTLOADER_BAUDRATE)
+ time.sleep(0.1) # just to get sure that the bootloader is really running in new baudrate mode!
+ del tty
+ tty = pyftdi.FTDI()
+ tty.usb_open(DEVICE1, DEVICE2)
+ tty.set_baudrate(BOOTLOADER_BAUDRATE)
+
+ print "Transfering pkernel program to IRAM",
+ # let the fun begin!
+ for seq in bootloaderseqs:
+ if(seq.address <= 0x40000):
+ addr = seq.address
+ else:
+ continue
+ #print "RAMing", len(seq.data), "bytes at address", hex(addr)
+ bootromWRITE(addr, len(seq.data), seq.data)
+ sys.stdout.write(".")
+ sys.stdout.flush()
+ print
+
+ # execute our pkernel finally and set pkernel conform baudrate
+ bootromCALL(0x30000)
+ time.sleep(0.1) # just to get sure that the pkernel is really running!
+ del tty
+ tty = pyftdi.FTDI()
+ tty.usb_open(DEVICE1, DEVICE2)
+ tty.set_baudrate(KERNEL_BAUDRATE)
+
+ print "Performing ChipErase..."
+ pkernCHIPERASE()
+
+ print "Flashing",
+ for seq in pkernelseqs:
+ # skip seqs only consisting of 0xffs
+ seqset = list(set(seq.data))
+ if len(seqset) == 1 and seqset[0] == 0xff:
+ continue
+ #print "Flashing", len(seq.data), "bytes at address", hex(seq.address)
+ pkernWRITE(seq.address, len(seq.data), seq.data)
+ sys.stdout.write(".")
+ sys.stdout.flush()
+ print
+
+ duration = time.time() - starttime
+ print "Procedure complete, took", round(duration, 2), "seconds."
+
+ sendByte(0x97) # exit and restart
+ print "Program was started. Have fun!"
+
+
+if __name__ == '__main__':
+ sys.exit(main())