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/**
* @file delay.h
* @brief Delay implementation
*/
#include "libmaple_types.h"
#include "stm32.h"
#ifndef _DELAY_H_
#define _DELAY_H_
/**
* @brief Delay the given number of microseconds.
*
* @param us Number of microseconds to delay.
*/
static inline void delay_us(uint32 us) {
us *= STM32_DELAY_US_MULT;
/* fudge for function call overhead */
us--;
asm volatile(" mov r0, %[us] \n\t"
"1: subs r0, #1 \n\t"
" bhi 1b \n\t"
:
: [us] "r" (us)
: "r0");
}
#endif
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