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# power.h File Reference

## Detailed Description

## Defines

#define | _AVR_POWER_H_ 1
#define | clock_prescale_set(x)
#define | clock_prescale_get() (clock_div_t)(CLKPR & (uint8_t)((1<<CLKPS0)|(1<<CLKPS1)|(1<<CLKPS2)|(1<<CLKPS3)))

## Enumerations

enum | clock_div_t { clock_div_1 = 0, clock_div_2 = 1, clock_div_4 = 2, clock_div_8 = 3, clock_div_16 = 4, clock_div_32 = 5, clock_div_64 = 6, clock_div_128 = 7, clock_div_256 = 8 }

## Define Documentation

#define clock_prescale_set | ( | x |  | ) |

Value:

    { \
            uint8_t tmp = _BV(CLKPCE); \
            __asm__ __volatile__ ( \
                    "in __tmp_reg__,__SREG__" "\n\t" \
                    "cli" "\n\t" \
                    "sts %1, %0" "\n\t" \
                    "sts %1, %2" "\n\t" \
                    "out __SREG__, __tmp_reg__" \
                    : /* no outputs */ \
                    : "d" (tmp), \
                      "M" (_SFR_MEM_ADDR(CLKPR)), \
                      "d" (x) \
                    : "r0"); \
    }

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