Introduction

CDC_Echo project

The project implements a Comunication Device Class (or more precisely Virtual COM Port device) that echoes the received packet.
The project has been tested on Windows 7/10 and Linux Mint 20.2

Build and Test

This project was created in the uVision Keil IDE.
The project used STM32F103C8 controller by default. If you use another controller, you must replace the contents of the core directory and correct the SystemInit function in the bsp.с file, as well as correct the binding of addresses to this controller in the usblib.h file:

#define USB_BASE       ((uint32_t)0x40005C00)
#define USB_PBUFFER    ((uint32_t)0x40006000)

Also correct the USBLIB_Init function in the usblib.c file.
Current implementation create Virtual Com Port with next settings: 115200, 0, none, 8, but you can change these settings as you want:

USBLIB_LineCoding lineCoding = {115200, 0, 0, 8};