skylark-qmk/tmk_core/common/avr/suspend_avr.h

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#ifndef SUSPEND_AVR_H
#define SUSPEND_AVR_H
#include <stdint.h>
#include <stdbool.h>
#include <avr/sleep.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
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#define wdt_intr_enable(value) \
__asm__ __volatile__("in __tmp_reg__,__SREG__" \
"\n\t" \
"cli" \
"\n\t" \
"wdr" \
"\n\t" \
"sts %0,%1" \
"\n\t" \
"out __SREG__,__tmp_reg__" \
"\n\t" \
"sts %0,%2" \
"\n\t" \
: /* no outputs */ \
: "M"(_SFR_MEM_ADDR(_WD_CONTROL_REG)), "r"(_BV(_WD_CHANGE_BIT) | _BV(WDE)), "r"((uint8_t)((value & 0x08 ? _WD_PS3_MASK : 0x00) | _BV(WDIE) | (value & 0x07))) \
: "r0")
#endif