ST Microelectronics
General
Infuse-IoT tooling expects the STM32CubeProgrammer tooling to be installed, with
the provided binaries available on $PATH.
Provisioning
STM provisioning information is stored in true One-Time-Programmable (OTP) memory. This means that once provisioned, the information cannot be erased.
Debug Port Disabling
STM microcontrollers do not provide a mechanism to completely disable the debug
access port (DAP) for releases. Application protection is instead limited to
ROM read-back protection (RDP), which is enabled with
CONFIG_INFUSE_COMMON_BOOT_DEBUG_PORT_DISABLE. The integrated
implementation only enables level 1 protection, which can be disabled by a debugger
(triggering a mass ROM erase).
A device with RDP enabled can be recovered with the following command:
STM32_Programmer_CLI --connect port=SWD -rdu
Note
It may take several runs of the above command to successfully disable RDP.
Hardware Peripherals
Watchdog
The standard STM32 IWDG peripheral only supports a single hardware channel.
CONFIG_INFUSE_WATCHDOG_SW_MULTICHANNEL must be enabled for
proper operation of Infuse-IoT subsystems.