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nxpprog.py
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nxpprog.py
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#!/usr/bin/python3
#
# Copyright (c) 2009 Brian Murphy <[email protected]>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# A simple programmer which works with the ISP protocol on NXP LPC arm
# processors.
import binascii
import os
import sys
import struct
import getopt
import serial # pyserial
import socket
import time
import ihex
CMD_SUCCESS = 0
INVALID_COMMAND = 1
SRC_ADDR_ERROR = 2
DST_ADDR_ERROR = 3
SRC_ADDR_NOT_MAPPED = 4
DST_ADDR_NOT_MAPPED = 5
COUNT_ERROR = 6
INVALID_SECTOR = 7
SECTOR_NOT_BLANK = 8
SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION = 9
COMPARE_ERROR = 10
BUSY = 11
PARAM_ERROR = 12
ADDR_ERROR = 13
ADDR_NOT_MAPPED = 14
CMD_LOCKED = 15
INVALID_CODE = 16
INVALID_BAUD_RATE = 17
INVALID_STOP_BIT = 18
CODE_READ_PROTECTION_ENABLED = 19
# flash sector sizes for lpc23xx/lpc24xx/lpc214x processors
flash_sector_lpc23xx = (
4, 4, 4, 4, 4, 4, 4, 4,
32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32,
4, 4, 4, 4, 4, 4
)
# flash sector sizes for 64k lpc21xx processors (without bootsector)
flash_sector_lpc21xx_64 = (
8, 8, 8, 8, 8, 8, 8, 8
)
# flash sector sizes for 128k lpc21xx processors (without bootsector)
flash_sector_lpc21xx_128 = (
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8
)
# flash sector sizes for 256k lpc21xx processors (without bootsector)
flash_sector_lpc21xx_256 = (
8, 8, 8, 8, 8, 8, 8, 8,
64, 64,
8, 8, 8, 8, 8, 8, 8,
)
# flash sector sizes for lpc17xx processors
flash_sector_lpc17xx = (
4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32,
)
# flash sector sizes for lpc11xx processors
flash_sector_lpc11xx = (
4, 4, 4, 4, 4, 4, 4, 4,
)
# flash sector sizes for lpc18xx processors
flash_sector_lpc18xx = (
8, 8, 8, 8, 8, 8, 8, 8,
64, 64, 64, 64, 64, 64, 64,
)
flash_prog_buffer_base_default = 0x40001000
flash_prog_buffer_size_default = 4096
# cpu parameter table
cpu_parms = {
# 128k flash
"lpc2364" : {
"flash_sector" : flash_sector_lpc23xx,
"flash_sector_count": 11,
"devid": 369162498
},
# 256k flash
"lpc2365" : {
"flash_sector" : flash_sector_lpc23xx,
"flash_sector_count": 15,
"devid": 369158179
},
"lpc2366" : {
"flash_sector" : flash_sector_lpc23xx,
"flash_sector_count": 15,
"devid": 369162531
},
# 512k flash
"lpc2367" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 369158181
},
"lpc2368" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 369162533
},
"lpc2377" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 385935397
},
"lpc2378" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 385940773
},
"lpc2387" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 402716981
},
"lpc2388" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 402718517
},
# lpc21xx
# some incomplete info here need at least sector count
"lpc2141": {
"devid": 196353,
"flash_sector": flash_sector_lpc23xx,
"flash_sector_count": 8,
},
"lpc2142": {
"flash_sector": flash_sector_lpc23xx,
"flash_sector_count": 9,
"devid": 196369,
},
"lpc2144": {
"flash_sector": flash_sector_lpc23xx,
"flash_sector_count": 11,
"devid": 196370,
},
"lpc2146": {
"flash_sector": flash_sector_lpc23xx,
"flash_sector_count": 15,
"devid": 196387,
},
"lpc2148": {
"flash_sector": flash_sector_lpc23xx,
"flash_sector_count": 27,
"devid": 196389,
},
"lpc2109" : {
"flash_sector": flash_sector_lpc21xx_64,
"devid": 33685249
},
"lpc2119" : {
"flash_sector": flash_sector_lpc21xx_128,
"devid": 33685266
},
"lpc2129" : {
"flash_sector": flash_sector_lpc21xx_256,
"devid": 33685267
},
"lpc2114" : {
"flash_sector" : flash_sector_lpc21xx_128,
"devid": 16908050
},
"lpc2124" : {
"flash_sector" : flash_sector_lpc21xx_256,
"devid": 16908051
},
"lpc2194" : {
"flash_sector" : flash_sector_lpc21xx_256,
"devid": 50462483
},
"lpc2292" : {
"flash_sector" : flash_sector_lpc21xx_256,
"devid": 67239699
},
"lpc2294" : {
"flash_sector" : flash_sector_lpc21xx_256,
"devid": 84016915
},
# lpc22xx
"lpc2212" : {
"flash_sector" : flash_sector_lpc21xx_128
},
"lpc2214" : {
"flash_sector" : flash_sector_lpc21xx_256
},
# lpc24xx
"lpc2458" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 352386869,
},
"lpc2468" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 369164085,
},
"lpc2478" : {
"flash_sector" : flash_sector_lpc23xx,
"devid": 386006837,
},
# lpc17xx
"lpc1769" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10000200,
"csum_vec": 7,
"devid": 0x26113f37,
"cpu_type": "thumb",
},
"lpc1768" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26013f37,
"cpu_type": "thumb",
},
"lpc1767" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26012837,
"cpu_type": "thumb",
},
"lpc1766" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26013f33,
"cpu_type": "thumb",
},
"lpc1765" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26013733,
"cpu_type": "thumb",
},
"lpc1764" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26011922,
"cpu_type": "thumb",
},
"lpc1763" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x26012033,
"cpu_type": "thumb",
},
"lpc1759" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25113737,
"cpu_type": "thumb",
},
"lpc1758" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25013f37,
"cpu_type": "thumb",
},
"lpc1756" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25011723,
"cpu_type": "thumb",
},
"lpc1754" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25011722,
"cpu_type": "thumb",
},
"lpc1752" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25001121,
"cpu_type": "thumb",
},
"lpc1751" : {
"flash_sector" : flash_sector_lpc17xx,
"flash_prog_buffer_base" : 0x10001000,
"csum_vec": 7,
"devid": 0x25001110,
"cpu_type": "thumb",
},
"lpc1114" : {
"flash_sector" : flash_sector_lpc11xx,
"flash_prog_buffer_base" : 0x10000400,
"devid": 0x0444102B,
"flash_prog_buffer_size" : 1024
},
# lpc18xx
"lpc1817" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_bank_addr": (0x1a000000, 0x1b000000),
"flash_prog_buffer_base" : 0x10081000,
"devid": (0xF001DB3F, 0),
"devid_word1_mask": 0xff,
"csum_vec": 7,
"cpu_type": "thumb",
},
"lpc1832" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_bank_addr": (0x1a000000),
"flash_prog_buffer_base" : 0x10081000,
"csum_vec": 7,
"cpu_type": "thumb",
},
"lpc1833" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_sector_count": 11,
"flash_bank_addr": (0x1a000000, 0x1b000000),
"flash_prog_buffer_base" : 0x10081000,
"devid": (0xf001da30, 0x44),
"csum_vec": 7,
"cpu_type": "thumb",
},
"lpc1837" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_bank_addr": (0x1a000000, 0x1b000000),
"flash_prog_buffer_base" : 0x10081000,
"devid": (0xf001da30, 0),
"csum_vec": 7,
"cpu_type": "thumb",
},
"lpc1853" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_sector_count": 11,
"flash_bank_addr": (0x1a000000, 0x1b000000),
"flash_prog_buffer_base" : 0x10081000,
"devid": (0xf001d830, 0),
"csum_vec": 7,
"cpu_type": "thumb",
},
"lpc1857" : {
"flash_sector" : flash_sector_lpc18xx,
"flash_bank_addr": (0x1a000000, 0x1b000000),
"flash_prog_buffer_base" : 0x10081000,
"devid": (0xf001d830, 0x44),
"csum_vec": 7,
"cpu_type": "thumb",
},
}
def log(str):
sys.stderr.write("%s\n" % str)
sys.stderr.flush()
def dump(name, str):
sys.stderr.write("%s:\n" % name)
ct = 0
for i in str:
sys.stderr.write("%x, " % ord(i))
ct += 1
if ct == 4:
ct = 0
sys.stderr.write("\n")
sys.stderr.write("\n")
def panic(str):
log(str)
sys.exit(1)
def syntax():
panic(
"""\
{0} <serial device> <image_file> : program image file to processor.
{0} --udp <ip address> <image_file> : program processor using Ethernet.
{0} --start=<addr> <serial device> : start the device at <addr>.
{0} --read=<file> --addr=<address> --len=<length> <serial device>:
read length bytes from address and dump them to a file.
{0} --serialnumber <serial device> : get the device serial number
{0} --list : list supported processors.
options:
--cpu=<cpu> : set the cpu type.
--oscfreq=<freq> : set the oscillator frequency.
--baud=<baud> : set the baud rate.
--xonxoff : enable xonxoff flow control.
--control : use RTS and DTR to control reset and int0.
--addr=<image start address> : set the base address for the image.
--verify : read the device after programming.
--verifyonly : don't program, just verify.
--eraseonly : don't program, just erase. Implies --eraseall.
--eraseall : erase all flash not just the area written to.
--blankcheck : don't program, just check that the flash is blank.
--filetype=[ihex|bin] : set filetype to intel hex format or raw binary.
--bank=[0|1] : select bank for devices with flash banks.
--port=<udp port> : UDP port number to use (default 41825).
--mac=<mac address> : MAC address to associate IP address with.\
""".format(os.path.basename(sys.argv[0])))
class SerialDevice(object):
def __init__(self, device, baud, xonxoff=False, control=False):
# Create the Serial object without port to avoid automatic opening
self._serial = serial.Serial(port=None, baudrate=baud)
# Disable RTS and DRT to avoid automatic reset to ISP mode (use --control for explicit reset)
self._serial.setRTS(0)
self._serial.setDTR(0)
# Select and open the port after RTS and DTR are set to zero
self._serial.setPort(device)
self._serial.open()
# set a two second timeout just in case there is nothing connected
# or the device is in the wrong mode.
# This timeout is too short for slow baud rates but who wants to
# use them?
self._serial.timeout = 1
# device wants Xon Xoff flow control
if xonxoff:
self._serial.setXonXoff(1)
# reset pin is controlled by DTR implying int0 is controlled by RTS
self.reset_pin = "dtr"
if control:
self.isp_mode()
self._serial.flushInput()
# put the chip in isp mode by resetting it using RTS and DTR signals
# this is of course only possible if the signals are connected in
# this way
def isp_mode(self):
self.reset(0)
time.sleep(.1)
self.reset(1)
self.int0(1)
time.sleep(.1)
self.reset(0)
time.sleep(.1)
self.int0(0)
def reset(self, level):
if self.reset_pin == "rts":
self._serial.setRTS(level)
else:
self._serial.setDTR(level)
def int0(self, level):
# if reset pin is rts int0 pin is dtr
if self.reset_pin == "rts":
self._serial.setDTR(level)
else:
self._serial.setRTS(level)
def write(self, data):
self._serial.write(data)
def readline(self, timeout=None):
if timeout:
ot = self._serial.timeout
self._serial.timeout = timeout
line = b''
while True:
c = self._serial.read(1)
if not c:
break
if c == b'\r':
if not line:
continue
else:
break
if c == b'\n':
if not line:
continue
else:
break
line += c
if timeout:
self._serial.timeout = ot
return line.decode("UTF-8", "ignore")
class UdpDevice(object):
def __init__(self, address):
self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self._sock.settimeout(5)
self._inet_addr = address[0]
self._udp_port = address[1]
self._eth_addr = address[2]
if self._eth_addr:
import subprocess
# Try add host to ARP table
obj = subprocess.Popen(['arp', '-s', self._inet_addr, self._eth_addr],
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
shell=True)
res = obj.communicate()
stdout_text = res[0].decode('ascii', 'ignore') if res[0] else ""
stderr_text = res[1].decode('ascii', 'ignore') if res[1] else ""
if obj.returncode or stderr_text:
panic("Failed to register IP address " +
"(Administrative privileges may be required)\r\n" +
stderr_text.replace('\r', '').replace('\n', ''))
self._sock.bind(('', self._udp_port))
def write(self, data):
self._sock.sendto(data, (self._inet_addr, self._udp_port))
def readline(self, timeout=None):
if timeout:
ot = self._sock.gettimeout()
self._sock.settimeout(timeout)
try:
line, addr = self._sock.recvfrom(1024)
except Exception as e:
line = b""
if timeout:
self._sock.settimeout(ot)
return line.decode("UTF-8", "ignore").replace('\r','').replace('\n','')
class nxpprog:
def __init__(self, cpu, device, baud, osc_freq, xonxoff=False, control=False, address=None, verify=False):
self.echo_on = True
self.verify = verify
self.OK = 'OK'
self.RESEND = 'RESEND'
self.sync_str = 'Synchronized'
# for calculations in 32 bit modulo arithmetic
self.U32_MOD = (2 ** 32)
# uuencoded line length
self.uu_line_size = 45
# uuencoded block length
self.uu_block_size = self.uu_line_size * 20
if address:
self.device = UdpDevice(address)
else:
self.device = SerialDevice(device, baud, xonxoff, control)
self.cpu = cpu
self.connection_init(osc_freq)
self.banks = self.get_cpu_parm("flash_bank_addr", 0)
if self.banks == 0:
self.sector_commands_need_bank = False
else:
self.sector_commands_need_bank = True
def connection_init(self, osc_freq):
self.sync(osc_freq)
if self.cpu == "autodetect":
devid = self.get_devid()
for dcpu in cpu_parms.keys():
cpu_devid = cpu_parms[dcpu].get("devid")
if not cpu_devid:
continue
# mask devid word1
devid_word1_mask = cpu_parms[dcpu].get("devid_word1_mask")
if devid_word1_mask and isinstance(devid, tuple) and devid[0] == cpu_devid[0] and (devid[1] & devid_word1_mask) == (cpu_devid[1] & devid_word1_mask):
log("Detected %s" % dcpu)
self.cpu = dcpu
break
if devid == cpu_devid:
log("Detected %s" % dcpu)
self.cpu = dcpu
break
if self.cpu == "autodetect":
panic("Cannot autodetect from device id %d(0x%x), set cpu name manually" %
(devid, devid))
# unlock write commands
self.isp_command("U 23130")
def dev_write(self, data):
self.device.write(data)
def dev_writeln(self, data):
data = data.encode('UTF-8') + b'\r\n'
# print('> ' + data)
self.device.write(data)
def dev_readline(self, timeout=None):
data = self.device.readline(timeout)
# print('< ' + data)
return data
def errexit(self, str, status):
if not status:
panic("%s: timeout" % str)
err = int(status)
if err != 0:
error_desc = [
'CMD_SUCCESS: Command is executed successfully',
'INVALID_COMMAND: Invalid command',
'SRC_ADDR_ERROR: Source address is not on word boundary',
'DST_ADDR_ERROR: Destination address is not on word or 256 byte boundary',
'SRC_ADDR_NOT_MAPPED: Source address is not mapped in the memory map',
'DST_ADDR_NOT_MAPPED: Destination address is not mapped in the memory map',
'COUNT_ERROR: Byte count is not multiple of 4 or is not a permitted value',
'INVALID_SECTOR: Sector number is invalid or end sector number is greater than start sector number',
'SECTOR_NOT_BLANK: Sector is not blank',
'SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION: Command to prepare sector for write operation was not executed',
'COMPARE_ERROR: Source and destination data not equal',
'BUSY: Flash programming hardware interface is busy',
'PARAM_ERROR: Insufficient number of parameters or invalid parameter',
'ADDR_ERROR: Address not on word boundary',
'ADDR_NOT_MAPPED: Address is not mapped in the memory map',
'CMD_LOCKED: Command is locked',
'INVALID_CODE: Unlock code is invalid',
'INVALID_BAUD_RATE: Invalid baud rate setting',
'INVALID_STOP_BIT: Invalid stop bit setting',
'CODE_READ_PROTECTION_ENABLED: Code read protection enabled'
]
str = str.replace('\r','').replace('\n','')
errstr = error_desc[err] if err < len(error_desc) else ""
panic("%s: %d - %s" % (str, err, errstr))
def isp_command(self, cmd):
retry = 3
while retry > 0:
retry -= 1
self.dev_writeln(cmd)
# throw away echo data
if self.echo_on:
echo = self.dev_readline()
if self.verify and echo != cmd:
log('Invalid echo')
status = self.dev_readline()
if status:
break
self.errexit("'%s' error" % cmd, status)
return status
def sync(self, osc):
for _ in range(10):
self.dev_write(b'?')
s = self.dev_readline()
if s:
break
if not s:
panic("Sync timeout")
if s != self.sync_str:
panic("No sync string")
self.dev_writeln(self.sync_str)
s = self.dev_readline()
# detect echo state
if s == self.sync_str:
self.echo_on = True
s = self.dev_readline()
elif s == self.OK:
self.echo_on = False
else:
panic("No sync string")
if s != self.OK:
panic("Not ok")
# set the oscillator frequency
self.dev_writeln('%d' % osc)
if self.echo_on:
s = self.dev_readline()
if s != ('%d' % osc):
panic('Invalid echo')
s = self.dev_readline()
if s != self.OK:
if s == str(INVALID_COMMAND):
pass
else:
self.errexit("'%d' osc not ok" % osc, s)
panic("Osc not ok")
# disable echo
self.dev_writeln('A 0')
if self.echo_on:
s = self.dev_readline()
if s != 'A 0':
panic('Invalid echo')
s = self.dev_readline()
if s == str(CMD_SUCCESS):
self.echo_on = False
elif s == str(INVALID_COMMAND):
pass
else:
self.errexit("'A 0' echo disable failed", s)
panic("Echo disable failed")
def sum(self, data):
s = 0
if isinstance(data, str):
for ch in data:
s += ord(ch)
else:
for i in data:
s += i
return s
def write_ram_block(self, addr, data):
data_len = len(data)
for i in range(0, data_len, self.uu_line_size):
c_line_size = data_len - i
if c_line_size > self.uu_line_size:
c_line_size = self.uu_line_size
block = data[i:i+c_line_size]
bstr = binascii.b2a_uu(block)
self.dev_write(bstr)
retry = 3
while retry > 0:
retry -= 1
self.dev_writeln('%s' % self.sum(data))
status = self.dev_readline()
if status:
break
if not status:
return "timeout"
if status == self.RESEND:
return "resend"
if status == self.OK:
return ""
# unknown status result
panic(status)
def uudecode(self, line):
# uu encoded data has an encoded length first
linelen = ord(line[0]) - 32
uu_linelen = (linelen + 3 - 1) // 3 * 4
if uu_linelen + 1 != len(line):
panic("Error in line length")
# pure python implementation - if this was C we would
# use bitshift operations here
decoded = ""
for i in range(1, len(line), 4):
c = 0
for j in line[i: i + 4]:
ch = ord(j) - 32
ch %= 64
c = c * 64 + ch
s = []
for j in range(0, 3):
s.append(c % 256)
c = c // 256
for j in reversed(s):
decoded = decoded + chr(j)
# only return real data
return decoded[0:linelen]
def read_block(self, addr, data_len, fd=None):
self.isp_command("R %d %d" % ( addr, data_len ))
expected_lines = (data_len + self.uu_line_size - 1) // self.uu_line_size
data = ""
for i in range(0, expected_lines, 20):
lines = expected_lines - i
if lines > 20:
lines = 20
cdata = ""
for i in range(0, lines):
line = self.dev_readline()
decoded = self.uudecode(line)
cdata += decoded
s = self.dev_readline()
if int(s) != self.sum(cdata):
panic("Checksum mismatch on read got 0x%x expected 0x%x" % (int(s), self.sum(data)))
else:
self.dev_writeln(self.OK)
if fd:
fd.write(cdata)
else:
data += cdata
if fd:
return None
else:
return data
def write_ram_data(self, addr, data):
image_len = len(data)
for i in range(0, image_len, self.uu_block_size):
a_block_size = image_len - i
if a_block_size > self.uu_block_size:
a_block_size = self.uu_block_size
self.isp_command("W %d %d" % ( addr, a_block_size ))
retry = 3
while retry > 0:
retry -= 1
err = self.write_ram_block(addr, data[i : i + a_block_size])
if not err:
break
elif err != "resend":
panic("Write error: %s" % err)
else:
log("Resending")
addr += a_block_size
def find_flash_sector(self, addr):
table = self.get_cpu_parm("flash_sector")
flash_base_addr = self.get_cpu_parm("flash_bank_addr", 0)
if flash_base_addr == 0:
faddr = 0
else:
faddr = flash_base_addr[0] # fix to have a current flash bank
for i in range(0, len(table)):
n_faddr = faddr + table[i] * 1024
if addr >= faddr and addr < n_faddr:
return i
faddr = n_faddr
return -1
def bytestr(self, ch, count):
data = b''
for i in range(0, count):
data += bytes([ch])
return data
def insert_csum(self, orig_image):
# make this a valid image by inserting a checksum in the correct place
intvecs = struct.unpack("<8I", orig_image[0:32])
# default vector is 5: 0x14, new cortex cpus use 7: 0x1c
valid_image_csum_vec = self.get_cpu_parm("csum_vec", 5)
# calculate the checksum over the interrupt vectors
csum = 0
intvecs_list = []
for vec in range(0, len(intvecs)):
intvecs_list.append(intvecs[vec])
if valid_image_csum_vec == 5 or vec <= valid_image_csum_vec:
csum = csum + intvecs[vec]
# remove the value at the checksum location
csum -= intvecs[valid_image_csum_vec]
csum %= self.U32_MOD
csum = self.U32_MOD - csum
log("Inserting intvec checksum 0x%08x in image at offset %d" %
(csum, valid_image_csum_vec))
intvecs_list[valid_image_csum_vec] = csum
image = b''
for vecval in intvecs_list:
image += struct.pack("<I", vecval)
image += orig_image[32:]
return image
def prepare_flash_sectors(self, start_sector, end_sector):
if self.sector_commands_need_bank:
self.isp_command("P %d %d 0" % (start_sector, end_sector))
else:
self.isp_command("P %d %d" % (start_sector, end_sector))
def erase_sectors(self, start_sector, end_sector, verify=False):
self.prepare_flash_sectors(start_sector, end_sector)
log("Erasing flash sectors %d-%d" % (start_sector, end_sector))
if self.sector_commands_need_bank:
self.isp_command("E %d %d 0" % (start_sector, end_sector))
else:
self.isp_command("E %d %d" % (start_sector, end_sector))
if verify:
log("Blank checking sectors %d-%d" % (start_sector, end_sector))
self.blank_check_sectors(start_sector, end_sector)
def blank_check_sectors(self, start_sector, end_sector):
global panic
old_panic = panic
panic = log
for i in range(start_sector, end_sector+1):
if self.sector_commands_need_bank:
cmd = ("I %d %d 0" % (i, i))
else:
cmd = ("I %d %d" % (i, i))
result = self.isp_command(cmd)
if result == str(CMD_SUCCESS):
pass
elif result == str(SECTOR_NOT_BLANK):
self.dev_readline() # offset
self.dev_readline() # content
else:
self.errexit("'%s' error" % cmd, status)
panic = old_panic
def erase_flash_range(self, start_addr, end_addr, verify=False):
start_sector = self.find_flash_sector(start_addr)
end_sector = self.find_flash_sector(end_addr)
self.erase_sectors(start_sector, end_sector, verify)
def get_cpu_parm(self, key, default=None):
ccpu_parms = cpu_parms.get(self.cpu)
if not ccpu_parms:
panic("No parameters defined for cpu %s" % self.cpu)
parm = ccpu_parms.get(key)
if parm:
return parm
if default is not None:
return default
else:
panic("No value for required cpu parameter %s" % key)
def erase_all(self, verify=False):
end_sector = self.get_cpu_parm("flash_sector_count",
len(self.get_cpu_parm("flash_sector"))) - 1
self.erase_sectors(0, end_sector, verify)
def blank_check_all(self):
end_sector = self.get_cpu_parm("flash_sector_count",
len(self.get_cpu_parm("flash_sector"))) - 1
self.blank_check_sectors(0, end_sector)