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biemster / st17h66_FindMy

Firmware for Lenze ST17h66 that advertises to the Apple Find My network
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st17h66_FindMy

Firmware for Lenze ST17h66 that advertises to the Apple Find My network, based on SDK v3.1.1.2

Compile

To compile this firmware either arm-none-eabi-gcc and CMSIS headers, or Keil uVision are required. The GCC path does not work yet, so use Keil.

Compile with Keil

This should work properly, just open the FindMy.uvprojx and build.

Compile with GCC

$ git clone https://github.com/ARM-software/CMSIS_5
$ git clone https://github.com/biemster/st17h66_FindMy
$ cd st17h66_FindMy/FindMy
$ make

GCC with the Makefile currently creates a 90kB hex file, which I havent tested yet. The following things might be wrong with it:

  1. The linker script phy6202.ld and startup code startup_ARMCM0.c.
    • I copied those from https://github.com/AloyseTech/PHY6202_GCC (thanks @AloyseTech!), but they are for the phy6202 chip (of which the 17h66 seems to be a clone). Also @AloyseTech seems to not have been finished with this work yet.
    • I actually have no clue what I'm doing here, this goes way beyond my expertise.
  2. The phy62XX BLE core code for lib/*.lib.
    • Located in lib/{rf,sec,ble_*}, is likely the sources for the .lib files but I'm not sure. They don't seem to be open source, but leaked from https://github.com/duanmubingshuai/project.
    • They are necessary because the GCC linker does not accept the provided .lib files.
    • It's quite likely the correct source, since the precompiled libraries have the same s_company_id = "PHY+62XXPLUS0504" as the C code.
  3. The bb_rom_sym_m0.gcc file.
    • This contains a lot of addresses for functions and variables, no clue where they come from. I followed what @AloyseTech did (thanks again @AloyseTech!).
    • This might be hit or miss, I don't know if compiling the firmware with GCC will put those symbols on different addresses, or maybe those objects are in some sort of bootloader.