This firmware implements the Maxim DS2432 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine using a development board based around STM32 F1 series micro-controller.
Maxim DS2432 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine based on the datasheet
This is a example application using the 1-Wire slave library
Following DS2432 features are not implemented:
- PF flag
- Load First Secret function command
- Compute Next Secret function command
- Copy Scratchpad function command
- prevent reading secret memory by returning 0xaa or 0x55
The current implementation uses a core board.
The underlying template also supports following board:
- Maple Mini, based on a STM32F103CBT6
- System Board, based on a STM32F103C8T6
- blue pill, based on a STM32F103C8T6
- core board, based on a STM32F103C8T6
Which board is used is defined in the Makefile. This is required to map the user LED and button provided on the board
Connect the peripherals the following way (STM32F10X signal; STM32F10X pin; peripheral pin; peripheral signal; comment):
- list board to preipheral pin connections
All pins are configured using
defines in the corresponding source code.
The source code uses the libopencm3 library.
The projects is already a git submodules.
It will be initialized when compiling the firmware.
Alternatively you can run once:
git submodule init and
git submodule update.
To compile the firmware run
To generate doxygen documentation run
There are two firmware images:
bootloader image allows to flash the
application over USB using the DFU protocol.
bootloader is started first and immediately jumps to the
application if it is valid and the DFU mode is not forced (i.e. by pressing the user button on the board or requesting a DFU detach in the
application image is the main application and is implemented in
It is up to the application to advertise USB DFU support (i.e. as does the provided USB CDC ACM example).
bootlaoder image will be flashed using SWD (Serial Wire Debug).
For that you need an SWD adapter.
Makefile uses a Black Magic Probe (per default), or a ST-Link V2 along OpenOCD software.
To flash the
booltoader using SWD run
bootloader is flashed it is possible to flash the
application over USB using the DFU protocol by running
To force the bootloader to start the DFU mode press the user button or short a pin, depending on the board.
It is also possible to flash the
application image using SWD by running
SWD also allows to debug the code running on the micro-controller using GDB.
To start the debugging session run
The firmware offers serial communication over USART1 and USB (using the CDC ACM device class).
You can also reset the board by setting the serial width to 5 bits over USB.
To reset the board run
This only works if provided USB CDC ACM is running correctly and the micro-controller isn't stuck.