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

ref: d5bfe1a35cc5b046782ddc4222f3344d9127f76e stm32h747i-disco-usb-image-viewer/tests/device_descriptor/delay.h -rw-r--r-- 93 bytes
d5bfe1a3 — Rutherther fix: usb should not rewrite DIEPCTL bits 4 months ago 
                                                                                
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#include <stdlib.h>
#include <stdio.h>

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