~ruther/stm32h747i-disco-usb-image-viewer

ref: f4b4b64a57a7a7f40049922456a2b6f005f792a9 stm32h747i-disco-usb-image-viewer/tests/device_descriptor/delay.h -rw-r--r-- 93 bytes
f4b4b64a — Rutherther fix: make queue thread safe 1 year, 27 days ago 
                                                                                
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#include <stdlib.h>
#include <stdio.h>

#define DELAY_US(x) printf("Waiting for %d us.", x);