It has also features to support STM32F4- and STM32F429 Discovery boards. Library can be used on all STM32F4xx devices. STM32F4xx will be seen to computer like COM port.
This means, that you don't need external USB->UART converter (like FTDI) to communicate with computer.
This library provides Virtual COM port on USB OTG. STSW-STM32102 - STM32 Virtual COM Port Driver Termite is a very usefull example of such a program and can. To see what message are sent from the STM32F3-Discovery, you will need COM Port Monitor Software on the PC. Remember what port number this is, because this is now the Virtual COM Port (e.g. Application software can access the USB device in the same way as it would access a standard COM port Treiber: STMicroelectronics Englisch: Die neuesten Gerätetreiber zum Download: STMicroelectronics bietet für Ihre Hardware stets die aktuellen Treiber Once the driver is installed correctly, Windows will go and create a new COM port in the Device Manager. But for this, Windows users will require dedicated driver Virtual COM port (VCP) drivers cause the USB device to appear as an additional COM port available to the PC. SMT32 can work as USB device too after all. No more onboard USB-to-UART converters like CP2102. 
Virtual Com Port, VCP to method of choice for almost all recent flight controllers to connect to PCs. STSW-STM32102 - STM32 Virtual COM Port Driver, STSW-STM32102, STMicroelectronic STM32 VirtualComPort driver for Windows. Home Stm32 virtual com port driver 1.5.0 download
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