USBasp programmer is a great programmer and uses software (VUSB) USB driver. I wanted to create another AVR programmer which is similar to USBasp but with real USB hardware to avoid connection issues which I had with USBasp before. The price of this board is just 1.81$ in case you buy it from Aliexpress hence it was a good alternative to USBasp.
This is the fast ISP programmer for AVR MCUs based on cheap stm32f103c8t6 aka
blue-pill board with usb-to-serial support.
Bit clock speed
FASTUSBasp starts out with a fast ISP clock frequency (default: 3 MHz),
-B bitclock option might be required to achieve stable communication
in case target MCU
F_CPU is bit low < 12MHz
Supported bitclock speed
- default (without -B): 3 MHz
- 1.5 MHz
- 750 KHz
- 375 KHz
- 187.5 KHz