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The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtualCOM port pairs and use any pair to connect one COM port based application to another. The HUB for communications (hub4com) allows to receive data and signals from one COM or TCP port, modify and send it to a number of other COM or TCP ports and vice versa.
Template Em::Blocks project for the STM32F4-Discovery board as USB virtualcom port. Using the standard peripheral library (not the new HAL). No board specific headers are used.
Get the driver here: http://www.st.com/web/en/catalog/tools/PF257938
The code contains a virtualcom driver which allows applications communicating with serial devices to communicate with another application emulating the serial device. Compared to tty0tty it does not use the tty subsystem of the kernel but implements directly the typical ioctls which are required from upper SW layers
Ponticulus (a virtualCOM-port over TCP/IP redirector) allows synchronous connecting and disconnecting to a remote serial port (e.g. on an embedded device). It was initially based on com2tcp, part of the com0com project. (http://com0com.sourceforge.net/)
lpcusb is a USB core stack for the built-in USB device of LPC214x microcontrollers. It handles the hardware interface and USB enumeration/configuration. Included are usage examples like USB joystick HID, USB virtualCOM port and USB mass storage on SD-ca