![Patrick Yang on Twitter: "USB-JTAG/SPI open source solution is available now! HW: CH32V305/V307 dev board, SW: OpenOCD source code and MCU code, Compile: Cygwin, USB driver: CH372DRV.EXE, Measured speed: 3.33MB/s High-Speed: CH32V305FBP6(TSSOP20) Patrick Yang on Twitter: "USB-JTAG/SPI open source solution is available now! HW: CH32V305/V307 dev board, SW: OpenOCD source code and MCU code, Compile: Cygwin, USB driver: CH372DRV.EXE, Measured speed: 3.33MB/s High-Speed: CH32V305FBP6(TSSOP20)](https://pbs.twimg.com/media/FS4LrjCaMAAWFiE.jpg)
Patrick Yang on Twitter: "USB-JTAG/SPI open source solution is available now! HW: CH32V305/V307 dev board, SW: OpenOCD source code and MCU code, Compile: Cygwin, USB driver: CH372DRV.EXE, Measured speed: 3.33MB/s High-Speed: CH32V305FBP6(TSSOP20)
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Amazon.com: USB to JTAG UART Module, USB to Serial Port Module, High Speed USB to JTAG UART/FIFO SPI/I2C, Multifunction USB to FIFO SPI/I2C Module, with 3Pin Header : Electronics
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