pkernel/kernel.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 communication with pkernel
   8 KERNEL_BAUDRATE=38400
   9
  10 print "Initializing serial port..."
  11 tty = SerialPort(DEVICE, 500, INIT_BAUDRATE)
  12
  13 while 1:
  14         tty.write('V')
  15         tty.flush()
  16         try:
  17                 if tty.read() == 'F':
  18                         break
  19         except SerialPortException:
  20                 # timeout happened, who cares ;-)
  21                 pass
  22
  23 print "OK, trying to set baudrate..."
  24 # set baudrate
  25 cmdBAUDRATE(REAL_BAUDRATE)
  26 tty = SerialPort(DEVICE, 100, REAL_BAUDRATE)
  27
  28 """
  29 print
  30 sendByte(0x01)
  31 print recvByte()
  32 sendByte(0x02)
  33 print recvByte()
  34 sys.exit(0)
  35 """
  36 """
  37 # execute (existing) program in ram
  38 cmdCALL(0x00033ffc)
  39 sys.exit(0)
  40 """
  41
  42 # read something from the IRAM
  43 #print cmdREAD(0x00030000, 32)
  44
  45 #data = []
  46 #for i in range(0, 32):
  47 #       data.append(i)
  48 #cmdWRITE(0x00030000, 32, data)
  49
  50
  51 """
  52 # write something to the begin of the IRAM
  53 data_wr = []
  54 checksum = 0
  55 for i in range(0, 0x400):
  56         value = i%256
  57         data_wr.append(value)
  58         checksum = (checksum + value) % (2**16)
  59
  60 print "Calculated checksum:", checksum
  61 print "Writing", data_wr, "to the IRAM..."
  62 cmdWRITE(0x00030000, len(data_wr), data_wr)
  63 print "Received Checksum:", last_checksum
  64 print
  65
  66 print "Reading from the IRAM again..."
  67 data_re = cmdREAD(0x00030000, len(data_wr))
  68 print "Received data:", data_re, "Checksum:", last_checksum
  69 """
  70
  71 """
  72 # see whats in the iram at the moment
  73 data_wr = []
  74 print "Reading from the IRAM..."
  75 data_re = cmdREAD(0x00030000, 0x10000-4)
  76 print "Received data:", data_re, "Checksum:", last_checksum
  77 """
  78
  79 """
  80 # see whats in the dram at the moment
  81 data_wr = []
  82 print "Reading from the DRAM..."
  83 data_re = cmdREAD(0x0002C000, 0x10000-0xC000-4)
  84 print "Received data:", data_re, "Checksum:", last_checksum
  85 """
  86
  87 """
  88 # blank the iram
  89 data_wr = []
  90 for i in range(0, 0x10000-4):
  91         value = 0
  92         data_wr.append(value)
  93
  94 print "Writing", data_wr, "to the IRAM..."
  95 cmdWRITE(0x00030000, len(data_wr), data_wr)
  96 print "Received Checksum:", last_checksum
  97 print
  98 """
  99
 100 """
 101 # blank the dram
 102 data_wr = []
 103 for i in range(0, 0x10000-0xC000-4):
 104         value = 0
 105         data_wr.append(value)
 106
 107 print "Writing", data_wr, "to the DRAM..."
 108 cmdWRITE(0x0002C000, len(data_wr), data_wr)
 109 print "Received Checksum:", last_checksum
 110 print
 111 """
 112
 113
 114 # write some data in the iram and try to execute it
 115 data_wr =[
 116                 0x9B,0x00,
 117                 0x0D,0x4e,
 118                 0xcf,0xf1,
 119                 0x16,0x01,
 120                 0x9b,0x05,
 121                 0x04,0xc7,
 122                 0xc1,0x06,
 123                 0x16,0x56,
 124                 0xe0,0xfb, #branch
 125                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0, #nop
 126                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 127                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 128                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 129                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 130                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0,
 131                 0x9f,0xa0,0x9f,0xa0,0x9f,0xa0]
 132 print "Writing", data_wr, "to the IRAM..."
 133 cmdWRITE(0x00030000, len(data_wr), data_wr)
 134 print "Received Checksum:", last_checksum
 135 print
 136 cmdCALL(0x00030000)