~ruther/qmk_firmware

ref: a8a87a0922a33d38ed80165ee62f9dc35bd08a3d qmk_firmware/quantum/virtser.h -rw-r--r-- 250 bytes
a8a87a09 — Pascal Getreuer [Core] Simplify audio_duration_to_ms() and audio_ms_to_duration(), reduce firmware size by a few bytes. (#21427) 2 years ago 
                                                                                
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#pragma once

void virtser_init(void);

/* Define this function in your code to process incoming bytes */
void virtser_recv(const uint8_t ch);

/* Call this to send a character over the Virtual Serial Device */
void virtser_send(const uint8_t byte);