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-
- #ifndef __DELAY_H
- #define __DELAY_H
-
- #include <stdint.h>
-
- // Convenience Macros, for delay compatibility with AVR-GCC
- #define _delay_ms(val) delay( val )
- #define _delay_us(val) delayMicroseconds( val )
-
-
- // the systick interrupt is supposed to increment this at 1 kHz rate
- extern volatile uint32_t systick_millis_count;
-
- static inline uint32_t millis(void) __attribute__((always_inline, unused));
- static inline uint32_t millis(void)
- {
- return systick_millis_count; // single aligned 32 bit is atomic;
- }
-
-
- static inline void delayMicroseconds(uint32_t) __attribute__((always_inline, unused));
- static inline void delayMicroseconds(uint32_t usec)
- {
- #if F_CPU == 96000000
- uint32_t n = usec << 5;
- #elif F_CPU == 48000000
- uint32_t n = usec << 4;
- #elif F_CPU == 24000000
- uint32_t n = usec << 3;
- #endif
- asm volatile(
- "L_%=_delayMicroseconds:" "\n\t"
- "subs %0, #1" "\n\t"
- "bne L_%=_delayMicroseconds" "\n"
- : "+r" (n) :
- );
- }
-
-
- void yield(void) __attribute__ ((weak));
-
- uint32_t micros(void);
-
- void delay(uint32_t ms);
-
- #endif
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