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MarlinFirmware/Marlin/macros.h

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/**
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* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef MACROS_H
#define MACROS_H
#define NUM_AXIS 4
#define ABCE 4
#define XYZE 4
#define ABC 3
#define XYZ 3
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// For use in macros that take a single axis letter
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#define _AXIS(A) (A##_AXIS)
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#define _XMIN_ 100
#define _YMIN_ 200
#define _ZMIN_ 300
#define _XMAX_ 101
#define _YMAX_ 201
#define _ZMAX_ 301
#define FORCE_INLINE __attribute__((always_inline)) inline
#define _UNUSED __attribute__((unused))
#define _O0 __attribute__((optimize("O0")))
#define _Os __attribute__((optimize("Os")))
#define _O1 __attribute__((optimize("O1")))
#define _O2 __attribute__((optimize("O2")))
#define _O3 __attribute__((optimize("O3")))
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// Clock speed factors
#define CYCLES_PER_MICROSECOND (F_CPU / 1000000L) // 16 or 20
#define INT0_PRESCALER 8
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// Nanoseconds per cycle
#define NANOSECONDS_PER_CYCLE (1000000000.0 / F_CPU)
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// Remove compiler warning on an unused variable
#define UNUSED(x) (void) (x)
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// Macros to make a string from a macro
#define STRINGIFY_(M) #M
#define STRINGIFY(M) STRINGIFY_(M)
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#define A(CODE) " " CODE "\n\t"
#define L(CODE) CODE ":\n\t"
// Macros for bit masks
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#undef _BV
#define _BV(b) (1 << (b))
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#define TEST(n,b) !!((n)&_BV(b))
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#define SBI(n,b) (n |= _BV(b))
#define CBI(n,b) (n &= ~_BV(b))
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#define SET_BIT_TO(N,B,TF) do{ if (TF) SBI(N,B); else CBI(N,B); }while(0)
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#define _BV32(b) (1UL << (b))
#define TEST32(n,b) !!((n)&_BV32(b))
#define SBI32(n,b) (n |= _BV32(b))
#define CBI32(n,b) (n &= ~_BV32(b))
// Macro to check that a number if a power if 2
#define IS_POWER_OF_2(x) ((x) && !((x) & ((x) - 1)))
// Macros for maths shortcuts
#undef M_PI
#define M_PI 3.14159265358979323846f
#define RADIANS(d) ((d)*M_PI/180.0f)
#define DEGREES(r) ((r)*180.0f/M_PI)
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#define HYPOT2(x,y) (sq(x)+sq(y))
#define CIRCLE_AREA(R) (M_PI * sq(float(R)))
#define CIRCLE_CIRC(R) (2 * M_PI * (float(R)))
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#define SIGN(a) ((a>0)-(a<0))
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#define IS_POWER_OF_2(x) ((x) && !((x) & ((x) - 1)))
// Macros to contrain values
#define NOLESS(v,n) do{ if (v < n) v = n; }while(0)
#define NOMORE(v,n) do{ if (v > n) v = n; }while(0)
#define LIMIT(v,n1,n2) do{ if (v < n1) v = n1; else if (v > n2) v = n2; }while(0)
// Macros to support option testing
#define _CAT(a, ...) a ## __VA_ARGS__
#define SWITCH_ENABLED_false 0
#define SWITCH_ENABLED_true 1
#define SWITCH_ENABLED_0 0
#define SWITCH_ENABLED_1 1
#define SWITCH_ENABLED_0x0 0
#define SWITCH_ENABLED_0x1 1
#define SWITCH_ENABLED_ 1
#define ENABLED(b) _CAT(SWITCH_ENABLED_, b)
#define DISABLED(b) !ENABLED(b)
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#define WITHIN(V,L,H) ((V) >= (L) && (V) <= (H))
#define NUMERIC(a) WITHIN(a, '0', '9')
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#define DECIMAL(a) (NUMERIC(a) || a == '.')
#define NUMERIC_SIGNED(a) (NUMERIC(a) || (a) == '-' || (a) == '+')
#define DECIMAL_SIGNED(a) (DECIMAL(a) || (a) == '-' || (a) == '+')
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#define COUNT(a) (sizeof(a)/sizeof(*a))
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#define ZERO(a) memset(a,0,sizeof(a))
#define COPY(a,b) memcpy(a,b,MIN(sizeof(a),sizeof(b)))
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// Macros for initializing arrays
#define ARRAY_6(v1, v2, v3, v4, v5, v6, ...) { v1, v2, v3, v4, v5, v6 }
#define ARRAY_5(v1, v2, v3, v4, v5, ...) { v1, v2, v3, v4, v5 }
#define ARRAY_4(v1, v2, v3, v4, ...) { v1, v2, v3, v4 }
#define ARRAY_3(v1, v2, v3, ...) { v1, v2, v3 }
#define ARRAY_2(v1, v2, ...) { v1, v2 }
#define ARRAY_1(v1, ...) { v1 }
#define _ARRAY_N(N, ...) ARRAY_ ##N(__VA_ARGS__)
#define ARRAY_N(N, ...) _ARRAY_N(N, __VA_ARGS__)
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// Macros for adding
#define INC_0 1
#define INC_1 2
#define INC_2 3
#define INC_3 4
#define INC_4 5
#define INC_5 6
#define INC_6 7
#define INC_7 8
#define INC_8 9
#define INCREMENT_(n) INC_ ##n
#define INCREMENT(n) INCREMENT_(n)
// Macros for subtracting
#define DEC_1 0
#define DEC_2 1
#define DEC_3 2
#define DEC_4 3
#define DEC_5 4
#define DEC_6 5
#define DEC_7 6
#define DEC_8 7
#define DEC_9 8
#define DECREMENT_(n) DEC_ ##n
#define DECREMENT(n) DECREMENT_(n)
#define PIN_EXISTS(PN) (defined(PN ##_PIN) && PN ##_PIN >= 0)
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#define PENDING(NOW,SOON) ((long)(NOW-(SOON))<0)
#define ELAPSED(NOW,SOON) (!PENDING(NOW,SOON))
#define MMM_TO_MMS(MM_M) ((MM_M)/60.0f)
#define MMS_TO_MMM(MM_S) ((MM_S)*60.0f)
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#define NOOP do{} while(0)
#define CEILING(x,y) (((x) + (y) - 1) / (y))
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// Avoid double evaluation of arguments on MIN/MAX/ABS
#undef MIN
#undef MAX
#undef ABS
#ifdef __cplusplus
// C++11 solution that is standards compliant. Return type is deduced automatically
template <class L, class R> static inline constexpr auto MIN(const L lhs, const R rhs) -> decltype(lhs + rhs) {
return lhs < rhs ? lhs : rhs;
}
template <class L, class R> static inline constexpr auto MAX(const L lhs, const R rhs) -> decltype(lhs + rhs){
return lhs > rhs ? lhs : rhs;
}
template <class T> static inline constexpr const T ABS(const T v) {
return v >= 0 ? v : -v;
}
#else
// Using GCC extensions, but Travis GCC version does not like it and gives
// "error: statement-expressions are not allowed outside functions nor in template-argument lists"
#define MIN(a, b) \
({__typeof__(a) _a = (a); \
__typeof__(b) _b = (b); \
_a < _b ? _a : _b;})
#define MAX(a, b) \
({__typeof__(a) _a = (a); \
__typeof__(b) _b = (b); \
_a > _b ? _a : _b;})
#define ABS(a) \
({__typeof__(a) _a = (a); \
_a >= 0 ? _a : -_a;})
#endif
#define MIN3(a, b, c) MIN(MIN(a, b), c)
#define MIN4(a, b, c, d) MIN(MIN3(a, b, c), d)
#define MIN5(a, b, c, d, e) MIN(MIN4(a, b, c, d), e)
#define MAX3(a, b, c) MAX(MAX(a, b), c)
#define MAX4(a, b, c, d) MAX(MAX3(a, b, c), d)
#define MAX5(a, b, c, d, e) MAX(MAX4(a, b, c, d), e)
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#define UNEAR_ZERO(x) ((x) < 0.000001f)
#define NEAR_ZERO(x) WITHIN(x, -0.000001f, 0.000001f)
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#define NEAR(x,y) NEAR_ZERO((x)-(y))
#define RECIPROCAL(x) (NEAR_ZERO(x) ? 0.0f : 1.0f / (x))
#define FIXFLOAT(f) (f + (f < 0.0f ? -0.00005f : 0.00005f))
//
// Maths macros that can be overridden by HAL
//
#define ATAN2(y, x) atan2f(y, x)
#define POW(x, y) powf(x, y)
#define SQRT(x) sqrtf(x)
#define RSQRT(x) (1 / sqrtf(x))
#define CEIL(x) ceilf(x)
#define FLOOR(x) floorf(x)
#define LROUND(x) lroundf(x)
#define FMOD(x, y) fmodf(x, y)
#define HYPOT(x,y) SQRT(HYPOT2(x,y))
#endif //__MACROS_H