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

ref: 68abb4c6d986c3d7f3f04aa5c6610190960c1104 stm32h747i-disco-usb-image-viewer/firmware/tests/device_descriptor/delay.h -rw-r--r-- 93 bytes
68abb4c6 — Rutherther chore: tidy up rust code 10 months ago 
                                                                                
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#include <stdlib.h>
#include <stdio.h>

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