X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=pkernel%2Fkernel.py;h=e495a86b693f10d2a9557d15a57f1052898e5ca4;hb=f88dcfc14562d73a3a7d8191a8c2c4c3062a8599;hp=89f7d7c333451ed0e61036566d28d299b2667d6e;hpb=96324b051bfefe94b0887d30f1897ed21b25efff;p=pyfrprog.git diff --git a/pkernel/kernel.py b/pkernel/kernel.py index 89f7d7c..e495a86 100755 --- a/pkernel/kernel.py +++ b/pkernel/kernel.py @@ -7,130 +7,143 @@ DEVICE="/dev/ttyUSB0" # baudrate used for communication with pkernel KERNEL_BAUDRATE=38400 -print "Initializing serial port..." -tty = SerialPort(DEVICE, 500, INIT_BAUDRATE) +def recvByte(): + i = tty.read() + return ord(i) -while 1: - tty.write('V') +def sendByte(byte): + time.sleep(0.005) # just to get sure, wait 5ms + tty.write(chr(byte)) 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) -""" -""" -# execute (existing) program in ram -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 -""" +def sendWord(word): + sendByte(word & 0xFF) + sendByte((word >> 8) & 0xFF) + +def sendDWord(dword): + sendByte(dword & 0xFF) + sendByte((dword >> 8) & 0xFF) + sendByte((dword >> 16) & 0xFF) + sendByte((dword >> 24) & 0xFF) + +def pkernCHIPERASE(): + sendByte(0x15) + if (recvByte() != 0x45): + raise Exception + print "wait..." + if (recvByte() != 0x23): + raise Exception + print "Chip erasing done." + +def pkernERASE(address, size): + sendByte(0x12) + if (recvByte() != 0x11): + raise Exception + sendDWord(address) + sendWord(size) + if (recvByte() != 0x18): + raise Exception + print "Erasing done." + + +def pkernWRITE(address, size, data): + print "address:", hex(address), "size:", size + # send WRITE command + sendByte(0x13) + if (recvByte() != 0x37): + raise Exception + # tell desired address and size + sendDWord(address) + sendWord(size) + + if (recvByte() != 0x04): + raise Exception + print "Received Metadata." + + # write binary stream of data + for i in range(0, size): + sendByte(data[i]) + + if (recvByte() != 0x08): + raise Exception + print "Received Data." + + if (recvByte() != 0x28): + raise Exception + print "Flashing done." + + +class FlashSequence(object): + def __init__(self, address, data): + self.address = address + self.data = data + +# list of all our address/data pairs to flash +flashseqs = [] -""" -# see whats in the iram at the moment -data_wr = [] -print "Reading from the IRAM..." -data_re = cmdREAD(0x00030000, 0x10000-4) -print "Received data:", data_re, "Checksum:", last_checksum -""" +print "Initializing serial port..." +tty = SerialPort(DEVICE, None, KERNEL_BAUDRATE) + +# check command line arguments +if len(sys.argv) != 2: + print "Usage: " + sys.argv[0] + " [mhx-file]" + sys.exit(1) + +# read in data from mhx-file before starting +try: + fp = open(sys.argv[1], "r") +except IOError: + print sys.argv[0] + ": Error - couldn't open file " + sys.argv[1] + "!" + sys.exit(1) + +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 + flashseqs.append(FlashSequence(address, data)) + +print "The following flash sequences have been read in:" +for seq in flashseqs: + print hex(seq.address) + ":", [hex(x) for x in seq.data] + + +# let the fun begin! """ -# see whats in the dram at the moment -data_wr = [] -print "Reading from the DRAM..." -data_re = cmdREAD(0x0002C000, 0x10000-0xC000-4) -print "Received data:", data_re, "Checksum:", last_checksum +for seq in flashseqs: + print "Erasing", len(seq.data), "bytes at address", hex(seq.address) + pkernERASE(seq.address, len(seq.data)) """ +print "ChipErase..." +pkernCHIPERASE() -""" -# blank the iram -data_wr = [] -for i in range(0, 0x10000-4): - value = 0 - data_wr.append(value) - -print "Writing", data_wr, "to the IRAM..." -cmdWRITE(0x00030000, len(data_wr), data_wr) -print "Received Checksum:", last_checksum -print -""" -""" -# blank the dram -data_wr = [] -for i in range(0, 0x10000-0xC000-4): - value = 0 - data_wr.append(value) - -print "Writing", data_wr, "to the DRAM..." -cmdWRITE(0x0002C000, len(data_wr), data_wr) -print "Received Checksum:", last_checksum -print -""" +for seq in flashseqs: + print "Flashing", len(seq.data), "bytes at address", hex(seq.address) + pkernWRITE(seq.address, len(seq.data), seq.data) +sendByte(0x99); -# write some data in the iram and try to execute it -data_wr =[ - 0x9B,0x00, - 0x0D,0x4e, - 0xcf,0xf1, - 0x16,0x01, - 0x9b,0x05, - 0x04,0xc7, - 0xc1,0x06, - 0x16,0x56, - 0xe0,0xfb, #branch - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, #nop - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, - 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0] -print "Writing", data_wr, "to the IRAM..." -cmdWRITE(0x00030000, len(data_wr), data_wr) -print "Received Checksum:", last_checksum -print -cmdCALL(0x00030000) +print "Reset your board now to run code from Flash"