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Improved float16ToPayload correction

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This commit is contained in:
Waldemar Porscha 2023-08-24 10:43:21 +02:00
parent 9c4e5d259a
commit a5c79214e3
1 changed files with 6 additions and 0 deletions
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6
src/knx/dptconvert.cpp
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@ -1753,6 +1753,12 @@ void float16ToPayload(uint8_t* payload, size_t payload_length, int index, double
exponent = ceil(log2(value + 1.0) - 11.0); exponent = ceil(log2(value + 1.0) - 11.0);
short mantissa = roundf(value / (1 << exponent)); short mantissa = roundf(value / (1 << exponent));
// above calculation causes mantissa overflow for values of the form 2^n, where n>11
if (mantissa >= 0x800)
{
exponent++;
mantissa = roundf(value / (1 << exponent));
}
if (wasNegative) if (wasNegative)
mantissa *= -1; mantissa *= -1;