27 lines
744 B
C
27 lines
744 B
C
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/* Standard Macros */
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/* You can totally get by without these, but why? */
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/* Make sure we've already got io / sfr / pindefs loaded */
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#ifndef _AVR_IO_H_
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#include <avr/io.h>
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#endif
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/* Reminder: the following useful bit-twiddling macros are
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always included in avr/sfr_defs.h, which is called from
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avr/io.h
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bit_is_set(sfr, bit)
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bit_is_clear(sfr, bit)
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loop_until_bit_is_set(sfr, bit)
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loop_until_bit_is_clear(sfr, bit)
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*/
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/* Define up the full complement of bit-twiddling macros */
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#define BV(bit) (1 << bit)
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#define set_bit(sfr, bit) (_SFR_BYTE(sfr) |= BV(bit)) // old sbi()
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#define clear_bit(sfr, bit) (_SFR_BYTE(sfr) &= ~BV(bit)) // old cbi()
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#define toggle_bit(sfr, bit) (_SFR_BYTE(sfr) ^= BV(bit))
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