AsProgrammer is a Windows-based application written primarily in C/C++. It acts as the user interface, sending hexadecimal commands to the CH340 chip, which then toggles the GPIO pins to emulate the SPI or I2C protocol.
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If you need a free, no-nonsense SPI flash programmer for a CH341A, ASProgrammer 21013 is a reliable classic that still gets the job done. asprogrammer 21013