![]() Why that magic "24 bits" number? Well, base 64 represents the numbers 0 to 63. If it is not programmed (the STM32 is empty, virgin or the program was not made to load the BIN file), it will be necessary to use St-Link or another programmer, or perhaps making use of the DFU method described in the tutorial above (DFU - DfuSe).I was curious how on EARTH base64 can convert 3 input bytes into 4 output bytes for just 33% space growth (whereas hex converts 1 input byte into 2 output bytes for 100% space growth). To use the *.BIN file it is necessary that the STM32 is already programmed to load the BIN file. It sounds a little confusing, but we have these steps:ġ- The STM32CubeIDE generates the *.elf file.Ģ- After compilation, the *.elf file is converted to *.hex.ģ- CRC value is added in *.hex file via srec_cat application.Ĥ- Now the *.hex file is converted to *.bin.ĥ- The BIN file is then stored on a USB flash drive.Ħ- STM32 updates firmware using USB flash drive file. Objcopy -input-target=ihex -output-target=binary code00.hex code00.bin S19 file, for do thisīut it seems that using the *.DFU file is not as standalone as using the *.BIN file, so I found this other code that converts the HEX file (generated with CRC) to the *.BIN file, which can be used with a USB stick, as per the tutorial cited at the beginning of this answer (11.3 USB MSC DFU host): This need to use a HEX file facilitates the operation of the implementation of the ROM.hex file generated with the CRC value, being practically a continuity: Upgrade the STM32 firmware during development or pre-production. The ability to programĪn "empty" STM32 device in a newly-assembled board via USB. JTAG, ST-LINK or USB-to-UART cable are needed. The key benefits of the DFU Boatloader are: No specific tools such us This other tutorial deals with using the file with *.DFU extension: Note: In this case, the file to be written is ROM.hex (you will need to configure the STM32CubeIDE to be able to do this operation, the IDE uses the *.elf file, see how to do it in the tips above) \checksum.batĬontents of the checksum.bat file: #!/bin/bash Unfortunately the amount of code is too big to post here directly, but I leave the code related to the other answer below:Īrm-none-eabi-objcopy -O ihex "$.hex" &. Some tips and solutions about this CRC usage (Windows/Linux) To simplify the process, please put srec_cat.exe into the root Srec_cat could be used to generate CRC checksum and put it into HEXįile. The binary file (*.bin) can be obtained with the help of the command that the colleague above explained (Employed Russian), and it (command) can also be adapted to produce a file containing the comparison value for CRC usage, as can be seen some details in these following posts: Notes: The example code from the STM32 tutorials are available in the descriptions of the videos themselves. This tutorial is part of a series of videos that are highly recommended for the programmer to watch, to understand a little better how the STM32 USB ports work and use (videos provided by the STM32 manufacturer itself, I recommend that the programmer watch all the videos on this channel): STM32 USB training - 11.3 USB MSC DFU host labs In case someone wants to use the DFU ("Do a Firmware Upgrade") function, this tutorial teaches how to use the binary file to be loaded via USB, when the STM32 is operating with USB Host (or maybe OTG): It certainly doesn't find instructions to blink the lights. When it finds "garbage" it doesn't understand, it probably just halts. Run arm-none-eabi-readelf -h tim_time_base.elf to see what some of this metadata are.īut when you processor jumps to location 0x8000000 after reset, it is expecting to find executable instructions, not metadata. The tim_time_base.elf is an ELF file - it has metadata associated with it. Question 2: Flashing the bin file gives the expected result (Leds blinking) However the leds are not blinking by flashing the elf file $(STLINK)/st-flash write $(PROJ_NAME).elf 0x8000000 so why? ![]() The actual command that runs is arm-none-eabi-objcopy -O binary tim_time_base.elf tim_time_base.bin When make executes this command: $(OBJCOPY) -O binary $(PROJ_NAME).elf $(PROJ_NAME).bin It assigns value arm-none-eabi-objcopy to make variable OBJCOPY. I opened the man but I didn't fully undrestand can anyone explain it simply ? Question 1: What does OBJCOPY=arm-none-eabi-objcopy in this case.
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