STM32F103RB USB virtual serial port example, refer to the official version, rewritten double buffering+ ring queue receiver, rewritten ring queue to send. Development environment for COOCOX IDE.

STM32F103RB
...........\STM32F103RB
...........\...........\Debug
...........\...........\.....\bin
...........\...........\.....\...\STM32F103RB.bin
...........\...........\.....\...\STM32F103RB.elf
...........\...........\.....\...\STM32F103RB.hex
...........\...........\.....\...\STM32F103RB.map
...........\...........\.....\...\history.xml
...........\...........\.....\obj
...........\...........\.....\...\core_cm3.o
...........\...........\.....\...\dependencies.xml
...........\...........\.....\...\history.xml
...........\...........\.....\...\hw_config.o
...........\...........\.....\...\main.o
...........\...........\.....\...\mem.o
...........\...........\.....\...\misc.o
...........\...........\.....\...\startup_stm32f10x_md.o
...........\...........\.....\...\stm32_it.o
...........\...........\.....\...\stm32f10x_adc.o
...........\...........\.....\...\stm32f10x_bkp.o
...........\...........\.....\...\stm32f10x_can.o
...........\...........\.....\...\stm32f10x_cec.o
...........\...........\.....\...\stm32f10x_crc.o
...........\...........\.....\...\stm32f10x_dac.o
...........\...........\.....\...\stm32f10x_dbgmcu.o
...........\...........\.....\...\stm32f10x_dma.o
...........\...........\.....\...\stm32f10x_exti.o
...........\...........\.....\...\stm32f10x_flash.o
...........\...........\.....\...\stm32f10x_fsmc.o
...........\...........\.....\...\stm32f10x_gpio.o
...........\...........\.....\...\stm32f10x_i2c.o
...........\...........\.....\...\stm32f10x_iwdg.o
...........\...........\.....\...\stm32f10x_pwr.o
...........\...........\.....\...\stm32f10x_rcc.o
...........\...........\.....\...\stm32f10x_rtc.o
...........\...........\.....\...\stm32f10x_sdio.o
...........\...........\.....\...\stm32f10x_spi.o
...........\...........\.....\...\stm32f10x_tim.o
...........\...........\.....\...\stm32f10x_usart.o
...........\...........\.....\...\stm32f10x_wwdg.o
...........\...........\.....\...\system_stm32f10x.o
...........\...........\.....\...\usb_core.o
...........\...........\.....\...\usb_desc.o
...........\...........\.....\...\usb_endp.o
...........\...........\.....\...\usb_init.o
...........\...........\.....\...\usb_int.o
...........\...........\.....\...\usb_istr.o
...........\...........\.....\...\usb_mem.o
...........\...........\.....\...\usb_prop.o
...........\...........\.....\...\usb_pwr.o
...........\...........\.....\...\usb_regs.o
...........\...........\.....\...\usb_sil.o
...........\...........\STM32F103RB.elf.xcodeproj
...........\...........\.........................\project.pbxproj
...........\STM32F103RB.cogui
...........\STM32F103RB.coproj
...........\STM32F10x_StdPeriph_Driver
...........\..........................\Release_Notes.html
...........\..........................\inc
...........\..........................\...\misc.h
...........\..........................\...\stm32f10x_adc.h
...........\..........................\...\stm32f10x_bkp.h
...........\..........................\...\stm32f10x_can.h
...........\..........................\...\stm32f10x_cec.h
...........\..........................\...\stm32f10x_crc.h
...........\..........................\...\stm32f10x_dac.h
...........\..........................\...\stm32f10x_dbgmcu.h
...........\..........................\...\stm32f10x_dma.h
...........\..........................\...\stm32f10x_exti.h
...........\..........................\...\stm32f10x_flash.h
...........\..........................\...\stm32f10x_fsmc.h
...........\..........................\...\stm32f10x_gpio.h
...........\..........................\...\stm32f10x_i2c.h
...........\..........................\...\stm32f10x_iwdg.h
...........\..........................\...\stm32f10x_pwr.h
...........\..........................\...\stm32f10x_rcc.h
...........\..........................\...\stm32f10x_rtc.h
...........\..........................\...\stm32f10x_sdio.h
...........\..........................\...\stm32f10x_spi.h
...........\..........................\...\stm32f10x_tim.h
...........\..........................\...\stm32f10x_usart.h
...........\.............

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