Stefano Calabretti
7b09401b00
* Add rx event handlers * Fix compile errors and add constness * Pass sender id * Change api interface * Revert changes * Add filter fifo * Add default setup * Add receive function * Remove interrupt activation * Activate RX interrupts * Merge remote changes * Add event list constructor * Fix compilation bug * Send and receive multiple frames * Refactor * Refactor * Fix compile error * Use known syntax * Refactor * Provide storage * Add frame end * Add some documentation * Turn macros into functions * Refactor * Refactor * Fix compile error * Use ExtendedIds Co-authored-by: Riccardo998 <riccardo.storchi98@gmail.com>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef INC_MMR_CAN_BINARY_LITERALS_H_
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#define INC_MMR_CAN_BINARY_LITERALS_H_
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/**
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* @brief
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* These set of macros (B_, B8_, B16_, B32_) allow one
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* to convert bit literals to their hexadecimal representation
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*
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* They are useful when it is needed to convey exactly which bits
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* are being set for a particular register, message etc...
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*
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* @example
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* B_(1010) = 0xA
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* B8_(1111, 1111) = 0xFF
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*
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* -----------------------------------------------------------
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* Macros taken from https://stackoverflow.com/a/7577517 and
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* sligthly readapted
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*/
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#define __B_0000 0
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#define __B_0001 1
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#define __B_0010 2
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#define __B_0011 3
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#define __B_0100 4
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#define __B_0101 5
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#define __B_0110 6
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#define __B_0111 7
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#define __B_1000 8
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#define __B_1001 9
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#define __B_1010 a
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#define __B_1011 b
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#define __B_1100 c
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#define __B_1101 d
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#define __B_1110 e
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#define __B_1111 f
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#define __B2H(bits) __B_ ## bits
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#define _B2H(bits) __B2H(bits)
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#define __HEX(n) 0x ## n
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#define _HEX(n) __HEX(n)
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#define __CCAT(a,b) a ## b
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#define _CCAT(a,b) __CCAT(a,b)
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#define B_(a) _HEX(_B2H(a))
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#define B8_(a, b) _HEX(_CCAT(_B2H(a), _B2H(b)))
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#define B16_(a, b, c, d) \
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_HEX(_CCAT( \
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_CCAT(_B2H(a), _B2H(b)), \
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_CCAT(_B2H(c), _B2H(d)) \
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))
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#define B32_(a, b, c, d, e, f, g, h) \
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_HEX(_CCAT( \
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_CCAT( \
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_CCAT(_B2H(a), _B2H(b)), \
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_CCAT(_B2H(c),_B2H(d))), \
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_CCAT( \
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_CCAT(_B2H(e), _B2H(f)), \
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_CCAT(_B2H(g), _B2H(h)) \
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) \
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))
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#endif /* INC_MMR_CAN_BINARY_LITERALS_H_ */
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