42 lines
840 B
C
42 lines
840 B
C
#warning revise me!
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/**
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* DECLARE_SMEAN(temperature, uint8_t, uint16_t);
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* for (i = 0; i < TEMP_MEANS; ++i)
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* SMEAN_ADD(temperature, adc_get(), TEMP_MEANS);
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* printf("mean temperature = %d\n", SMEAN_GET(temperature));
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*/
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/**
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* Instantiate a mean instance
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*/
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#define DECLARE_SMEAN(name, Type, SumType) \
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struct { \
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SumType sum; \
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Type result; \
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int count; \
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} name = { 0, 0, 0 }
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/**
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* Insert a new sample into the mean.
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*
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* \note \a mean and \a max_samples are evaluated multiple times
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*/
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#define SMEAN_ADD(mean, sample, max_samples) \
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do { \
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(mean).sum += (sample); \
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if ((mean).count++ >= (max_samples)) \
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{ \
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(mean).result = (mean).sum / (max_samples); \
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(mean).sum = 0; \
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(mean).count = 0; \
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} \
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} while (0)
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/**
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* Return current mean value.
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*/
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#define SMEAN_GET(mean) ((mean).result)
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