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DFuSe Bad Firmware

Question asked by Mathilde on Mar 18, 2015
Latest reply on Mar 30, 2015 by Amel N
I want to implement a firmware update capability on my board via USB DFU. For now, I experiment on the STM32F4 discovery board following the example in STM32Cube_FW_F4_V1.4.0 (USB device application "DFU_Standalone"). Actually, it only consists in initializing the USB in DFU mode. However when I open DFuSe Demo(v3.0.4), the device appears but there is the following message in the status box: "Unable to find or decode device mapping... Bad Firmware". When I put the device in boot mode with a jumper on the boot0 pin, everything works fine, I can upload or upgrade the firmware.
So my question is, what can be causing this problem to happen? Do I need to do something mode than putting the device in DFU mode in the code?

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