This demo is targeted towards the Olimexino-STM32F3 board, with 256 kB internal Flash EEPROM and 40 kB internal RAM.

To program the bootloader into the internal flash on the STM32F303 microcontroller, the ST-LINK/V2 debugger interface was used. However, this is not required if you have another means of programming the internal flash. To connect the 20-pin cable of the ST-LINK/V2 to the 10-pin SWD connector on the board, the ARM-JTAG-20-10 adapter was used. For the RS232 communication, the MOD-USB-RS232 was attached.

To compile the demo programs you can use the Keil MDK development environment.

These demo programs additionally demonstrate the so-called firmware info check. The firmware info table feature is meant for those OpenBLT bootloader users who prefer more control over the firmware update procedure. It adds functionality to the bootloader for deciding if a firmware update is allowed to proceed or not.

To name just a few examples, with this feature you could:

• Prevent a firmware update from proceeding, if the new firmware is not actually destined for the product or hardware revision.
• Prevent a firmware update from proceeding, if the new firmware has the same or an older version compared to the currently programmed version.

For more in-depth details refer to the firmware info check Wiki page.

Before the bootloader can be used, it needs to be built and programmed into the STM32F303's internal flash memory. The steps in this section only need to be done once.

When using Keil MDK, simply open the project from within uVision. The project file (stm32f303.uvprojx) is located at: \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Boot\ide\. Once opened, select Project→Rebuild all target files from the menu to compile all the bootloader sources and link the together into the final executable.

The bootloader program is now ready to be programmed into the internal flash memory of the STM32F303. Using your favorite programmer, flash the bootloader using one of the following files, depending on what file type your programmer supports:

• \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Boot\bin\openblt_olimexino_stm32f3.axf
• \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Boot\bin\openblt_olimexino_stm32f3.srec

When using Keil MDK, simply open the project from within uVision. The project file (stm32f303.uvprojx) is located at: \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Prog\ide\. Once opened, select Project→Rebuild all target files from the menu to compile all the demo program sources and link the together into the final executable.

The output file is

• \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Prog\bin\demoprog_olimexino_stm32f3.srec

To download the demo program \Target\Demo\ARMCM4_STM32F3_Olimexino_STM32F3_Keil\Prog\bin\demoprog_olimexino_stm32f3.srec using the bootloader, follow the instructions in the following links, depending on the communication interface you intend to use:

• Firmware updates using the RS232 communication interface
• Firmware updates using the CAN communication interface
• Firmware updates using the USB communication interface
• Firmware updates from SD-card