Greg Steiert / pegasus_dev

Development mbed library for MAX32630FTHR

Dependents:   blinky_max32630fthr

tools/patch.py@3:1198227e6421, 2016-12-16 (annotated)

Committer:
switches
Date:
Fri Dec 16 16:27:57 2016 +0000
Revision:
3:1198227e6421
Parent:
0:5c4d7b2438d3 
Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 """
switches 0:5c4d7b2438d3 2 mbed SDK
switches 0:5c4d7b2438d3 3 Copyright (c) 2011-2013 ARM Limited
switches 0:5c4d7b2438d3 4
switches 0:5c4d7b2438d3 5 Licensed under the Apache License, Version 2.0 (the "License");
switches 0:5c4d7b2438d3 6 you may not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 7 You may obtain a copy of the License at
switches 0:5c4d7b2438d3 8
switches 0:5c4d7b2438d3 9 http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 10
switches 0:5c4d7b2438d3 11 Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 12 distributed under the License is distributed on an "AS IS" BASIS,
switches 0:5c4d7b2438d3 13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 14 See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 15 limitations under the License.
switches 0:5c4d7b2438d3 16
switches 0:5c4d7b2438d3 17
switches 0:5c4d7b2438d3 18 http://www.nxp.com/documents/user_manual/UM10360.pdf
switches 0:5c4d7b2438d3 19
switches 0:5c4d7b2438d3 20 32.3.1.1 Criterion for Valid User Code
switches 0:5c4d7b2438d3 21 The reserved Cortex-M3 exception vector location 7 (offset 0x1C in the vector table)
switches 0:5c4d7b2438d3 22 should contain the 2's complement of the check-sum of table entries 0 through 6. This
switches 0:5c4d7b2438d3 23 causes the checksum of the first 8 table entries to be 0. The boot loader code checksums
switches 0:5c4d7b2438d3 24 the first 8 locations in sector 0 of the flash. If the result is 0, then execution control is
switches 0:5c4d7b2438d3 25 transferred to the user code.
switches 0:5c4d7b2438d3 26 """
switches 0:5c4d7b2438d3 27 from struct import unpack, pack
switches 0:5c4d7b2438d3 28
switches 0:5c4d7b2438d3 29
switches 0:5c4d7b2438d3 30 def patch(bin_path):
switches 0:5c4d7b2438d3 31 with open(bin_path, 'r+b') as bin:
switches 0:5c4d7b2438d3 32 # Read entries 0 through 6 (Little Endian 32bits words)
switches 0:5c4d7b2438d3 33 vector = [unpack('<I', bin.read(4))[0] for _ in range(7)]
switches 0:5c4d7b2438d3 34
switches 0:5c4d7b2438d3 35 # location 7 (offset 0x1C in the vector table) should contain the 2's
switches 0:5c4d7b2438d3 36 # complement of the check-sum of table entries 0 through 6
switches 0:5c4d7b2438d3 37 bin.seek(0x1C)
switches 0:5c4d7b2438d3 38 bin.write(pack('<I', (~sum(vector) + 1) & 0xFFFFFFFF))
switches 0:5c4d7b2438d3 39
switches 0:5c4d7b2438d3 40
switches 0:5c4d7b2438d3 41 def is_patched(bin_path):
switches 0:5c4d7b2438d3 42 with open(bin_path, 'rb') as bin:
switches 0:5c4d7b2438d3 43 # The checksum of the first 8 table entries should be 0
switches 0:5c4d7b2438d3 44 return (sum([unpack('<I', bin.read(4))[0] for _ in range(8)]) & 0xFFFFFFFF) == 0
switches 0:5c4d7b2438d3 45
switches 0:5c4d7b2438d3 46
switches 0:5c4d7b2438d3 47 if __name__ == '__main__':
switches 0:5c4d7b2438d3 48 bin_path = "C:/Users/emimon01/releases/emilmont/build/test/LPC1768/ARM/MBED_A1/basic.bin"
switches 0:5c4d7b2438d3 49 patch(bin_path)
switches 0:5c4d7b2438d3 50 assert is_patched(bin_path), "The file is not patched"