Initial commit

.gitignore

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+# ---> Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
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+.eggs/
+lib/
+lib64/
+parts/
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+var/
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+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
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+# Unit test / coverage reports
+htmlcov/
+.tox/
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+.coverage
+.coverage.*
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+nosetests.xml
+coverage.xml
+*.cover
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+cover/
+
+# Translations
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+# Django stuff:
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+# pyenv
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+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
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+#   This is especially recommended for binary packages to ensure reproducibility, and is more
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+#uv.lock
+
+# poetry
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+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
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+#pdm.lock
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+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
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+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
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+.env
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+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+

LICENSE

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+MIT License
+
+Copyright (c) 2025 dominic
+
+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.

README.md

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+# IAPy: NXP IAP Python module for GDB
+
+The purpose of this module is to patch in manual calls to the NXP IAP via GDB,
+for when your programming adapter of choice will for whatever reason not cooperate.
+
+Currently only sector erasing or calling the IAP directly is implemented.
+It is highly recommended to overfeed the watchdog and set the system clock to something stable like the FRO.
+
+Good luck, you'll need it.
+
+## How to use
+
+```gdb
+# load IAPy
+source iapy.py
+
+# erase sectors
+py iap_flash_sector_erase(0, 3)
+
+# load image as usual
+load
+```
+
+# Credits
+
+ - [LPC54113 programming via OpenOCD](https://www.dlbeer.co.nz/articles/lpc54113_openocd/index.html) by Daniel Beer

iapy.py

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+import gdb
+import time
+
+# get the current inferior, i.e. the connection to target
+inferior = gdb.selected_inferior()
+
+def target_u32read(address, endian='little'):
+    value = inferior.read_memory(address, 4)
+    return int.from_bytes(value, byteorder=endian)
+
+def target_u32write(address, value, endian='little'):
+    data = value.to_bytes(4, byteorder=endian)  # Adjust byteorder as needed
+    inferior.write_memory(address, data)
+
+def target_regset(name, value):
+    gdb.execute(f'set ${name} = {value}')
+
+def target_prepare():
+    """
+    Prepares the target for IAP operations.
+    This implementation is an example for the LPC546xx series of chips.
+    """
+
+    LPC546XX_WDT_PERIOD_MAX = 0xFFFFFF
+    LPC546XX_WDT_PROTECT = (1 << 4)
+    LPC546XX_MAINCLKSELA = 0x40000280
+    LPC546XX_MAINCLKSELB = 0x40000284
+    LPC546XX_AHBCLKDIV =   0x40000380
+    LPC546XX_FLASHCFG  =   0x40000400
+
+    gdb.execute('interrupt')
+    # check if watchdog timer's on
+    wdt_mode = target_u32read(LPC546XX_WDT_MODE)
+	# if WDT on, we can't disable it, but we may be able to set a long period
+	if (wdt_mode and not(wdt_mode & LPC546XX_WDT_PROTECT)):
+        target_u32write(LPC546XX_WDT_CNT, LPC546XX_WDT_PERIOD_MAX)
+
+    # SYSCLK: 12MHz FRO
+    target_u32write(LPC546XX_MAINCLKSELA, 0)
+    # use MAINCLKSELA
+	target_u32write(LPC546XX_MAINCLKSELB, 0)
+	# div by 1
+	target_u32write(LPC546XX_AHBCLKDIV, 0)
+	# recommended default configuration
+	target_u32write(LPC546XX_FLASHCFG, 0x1A)
+
+def iap_command(a0, a1=0, a2=0, a3=0, a4=0):
+    gdb.execute('interrupt')
+    # setup request
+    target_u32write(0x2000ffa0, a0)
+    target_u32write(0x2000ffa4, a1)
+    target_u32write(0x2000ffa8, a2)
+    target_u32write(0x2000ffac, a3)
+    target_u32write(0x2000ffb0, a4)
+
+    # clear result
+    target_u32write(0x2000ffc0, a0)
+    target_u32write(0x2000ffc4, a1)
+    target_u32write(0x2000ffc8, a2)
+    target_u32write(0x2000ffcc, a3)
+    target_u32write(0x2000ffd0, a4)
+
+    # call setup
+    target_regset('lr', 0x00020001)
+    target_regset('r0', 0x2000ffa0)
+    target_regset('r1', 0x2000ffc0)
+    target_regset('pc', 0x03000205)
+    target_regset('primask', 1)
+    target_regset('msp', 0x2000ffa0)
+
+    # execute and wait
+    gdb.execute('continue')
+    time.sleep(0.5)
+
+    # gather results
+    res0 = target_u32read(0x2000ffc0)
+    res1 = target_u32read(0x2000ffc4)
+    res2 = target_u32read(0x2000ffc8)
+    res3 = target_u32read(0x2000ffcc)
+    res4 = target_u32read(0x2000ffd0)
+
+    return res0,res1,res2,res3,res4
+
+def iap_flash_sector_erase(start_sector, end_sector, sysclk=12000):
+    print(f"IAPy: Erasing sectors {start_sector} to {end_sector}")
+    target_prepare()
+    # prepare sectors
+    iap_command(50, start_sector, end_sector)
+    # erase sectors
+    iap_command(52, start_sector, end_sector, sysclk)
+    gdb.execute('interrupt')
+
+
+