23 lines
496 B
C
23 lines
496 B
C
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#ifndef _LINCAL_H
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#define _LINCAL_H
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#include <ch32fun.h>
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// Fixed-point number in 8.8 format
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typedef int16_t fp16_t;
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#define F32_TO_FP16(f) ((fp16_t)((f) * 256.0f))
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// Intger part of fp16_t
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#define I(f) ((f) >> 8)
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// Decimal part of fp16_t
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#define D(f) ((f) & 0xFF)
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// v * a + b for signed 16-bit
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#define I16_LINCAL(v, a, b) ((int16_t)((((int32_t)(v) * (a)) >> 8) + (b)))
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// v * a + b for unsigned 16-bit
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#define U16_LINCAL(v, a, b) ((uint16_t)((((uint32_t)(v) * (a)) >> 8) + (b)))
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#endif
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