takashi kadono / Mbed OS Nucleo_446

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Dependencies:   ssd1331

mbed-os/tools/targets/LPC.py@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 """
kadonotakashi 0:8fdf9a60065b 2 mbed SDK
kadonotakashi 0:8fdf9a60065b 3 Copyright (c) 2011-2013 ARM Limited
kadonotakashi 0:8fdf9a60065b 4
kadonotakashi 0:8fdf9a60065b 5 Licensed under the Apache License, Version 2.0 (the "License");
kadonotakashi 0:8fdf9a60065b 6 you may not use this file except in compliance with the License.
kadonotakashi 0:8fdf9a60065b 7 You may obtain a copy of the License at
kadonotakashi 0:8fdf9a60065b 8
kadonotakashi 0:8fdf9a60065b 9 http://www.apache.org/licenses/LICENSE-2.0
kadonotakashi 0:8fdf9a60065b 10
kadonotakashi 0:8fdf9a60065b 11 Unless required by applicable law or agreed to in writing, software
kadonotakashi 0:8fdf9a60065b 12 distributed under the License is distributed on an "AS IS" BASIS,
kadonotakashi 0:8fdf9a60065b 13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kadonotakashi 0:8fdf9a60065b 14 See the License for the specific language governing permissions and
kadonotakashi 0:8fdf9a60065b 15 limitations under the License.
kadonotakashi 0:8fdf9a60065b 16
kadonotakashi 0:8fdf9a60065b 17
kadonotakashi 0:8fdf9a60065b 18 http://www.nxp.com/documents/user_manual/UM10360.pdf
kadonotakashi 0:8fdf9a60065b 19
kadonotakashi 0:8fdf9a60065b 20 32.3.1.1 Criterion for Valid User Code
kadonotakashi 0:8fdf9a60065b 21 The reserved Cortex-M3 exception vector location 7 (offset 0x1C in the vector table)
kadonotakashi 0:8fdf9a60065b 22 should contain the 2's complement of the check-sum of table entries 0 through 6. This
kadonotakashi 0:8fdf9a60065b 23 causes the checksum of the first 8 table entries to be 0. The boot loader code checksums
kadonotakashi 0:8fdf9a60065b 24 the first 8 locations in sector 0 of the flash. If the result is 0, then execution control is
kadonotakashi 0:8fdf9a60065b 25 transferred to the user code.
kadonotakashi 0:8fdf9a60065b 26 """
kadonotakashi 0:8fdf9a60065b 27 from struct import unpack, pack
kadonotakashi 0:8fdf9a60065b 28
kadonotakashi 0:8fdf9a60065b 29
kadonotakashi 0:8fdf9a60065b 30 def patch(bin_path):
kadonotakashi 0:8fdf9a60065b 31 with open(bin_path, 'r+b') as bin:
kadonotakashi 0:8fdf9a60065b 32 # Read entries 0 through 6 (Little Endian 32bits words)
kadonotakashi 0:8fdf9a60065b 33 vector = [unpack('<I', bin.read(4))[0] for _ in range(7)]
kadonotakashi 0:8fdf9a60065b 34
kadonotakashi 0:8fdf9a60065b 35 # location 7 (offset 0x1C in the vector table) should contain the 2's
kadonotakashi 0:8fdf9a60065b 36 # complement of the check-sum of table entries 0 through 6
kadonotakashi 0:8fdf9a60065b 37 bin.seek(0x1C)
kadonotakashi 0:8fdf9a60065b 38 bin.write(pack('<I', (~sum(vector) + 1) & 0xFFFFFFFF))
kadonotakashi 0:8fdf9a60065b 39
kadonotakashi 0:8fdf9a60065b 40
kadonotakashi 0:8fdf9a60065b 41 def is_patched(bin_path):
kadonotakashi 0:8fdf9a60065b 42 with open(bin_path, 'rb') as bin:
kadonotakashi 0:8fdf9a60065b 43 # The checksum of the first 8 table entries should be 0
kadonotakashi 0:8fdf9a60065b 44 return (sum([unpack('<I', bin.read(4))[0] for _ in range(8)]) & 0xFFFFFFFF) == 0
kadonotakashi 0:8fdf9a60065b 45
kadonotakashi 0:8fdf9a60065b 46
kadonotakashi 0:8fdf9a60065b 47 if __name__ == '__main__':
kadonotakashi 0:8fdf9a60065b 48 bin_path = "C:/Users/emimon01/releases/emilmont/build/test/LPC1768/ARM/MBED_A1/basic.bin"
kadonotakashi 0:8fdf9a60065b 49 patch(bin_path)
kadonotakashi 0:8fdf9a60065b 50 assert is_patched(bin_path), "The file is not patched"