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Simplify the calculations.

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This commit is contained in:
Jonathan Naylor
2020-04-27 12:05:55 +01:00
parent 82dcc44a2d
commit e8ed77241c
4 changed files with 7 additions and 22 deletions
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FMCTCSSRX.cpp
+3 -4
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@@ -91,10 +91,9 @@ m_rxLevelInverse(1)
{
}
uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, q15_t rxLevel)
uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, uint8_t level)
{
// Calculate 1/rxLevel
m_rxLevelInverse = q31_t(q15Division(65535 /* This value should be 32767 (q15 1). But this does not work.*/, rxLevel));
m_rxLevelInverse = 255 / q15_t(level);
m_coeffDivTwo = 0;
@@ -115,7 +114,7 @@ uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, q15_t rxLeve
CTCSSState CFMCTCSSRX::process(q15_t sample)
{
q63_t sample31 = q31_t(sample) * m_rxLevelInverse;
q31_t sample31 = q31_t(sample) * m_rxLevelInverse;
m_result = m_result & (~CTS_READY);