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Fix negative value on 32 bit architecture #7

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Fix negative value on 32 bit architecture #7

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6 changes: 3 additions & 3 deletions LM75.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -27,16 +27,16 @@ LM75::LM75 (byte addr) {
address = addr;
}

word LM75::float2regdata (float temp)
uint16_t LM75::float2regdata (float temp)
{
// First multiply by 8 and coerce to integer to get +/- whole numbers
// Then coerce to word and bitshift 5 to fill out MSB
return (word)((int)(temp * 8) << 5);
return (uint16_t)((int16_t)(temp * 8) << 5);
}

float LM75::regdata2float (word regdata)
{
return ((float)(int)regdata / 32) / 8;
return ((float)(int16_t)regdata / 32) / 8;
}

word LM75::_register16 (byte reg) {
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