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Merge branch 'master' into boxcar

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This commit is contained in:
Jonathan Naylor 2017-07-16 19:01:54 +01:00
commit 8ce38eec9a
10 changed files with 18 additions and 22 deletions
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20
IO.cpp
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@ -57,15 +57,15 @@ m_dcFilter(),
m_dcState()
{
::memset(m_boxcarState, 0x00U, 30U * sizeof(q15_t));
::memset(m_dcState, 0x00U, 4U * sizeof(q31_t));
::memset(m_dcState, 0x00U, 4U * sizeof(q31_t));
m_boxcarFilter.numTaps = BOXCAR_FILTER_LEN;
m_boxcarFilter.pState = m_boxcarState;
m_boxcarFilter.pCoeffs = BOXCAR_FILTER;
m_dcFilter.numStages = DC_FILTER_STAGES;
m_dcFilter.pState = m_dcState;
m_dcFilter.pCoeffs = DC_FILTER;
m_dcFilter.pState = m_dcState;
m_dcFilter.pCoeffs = DC_FILTER;
m_dcFilter.postShift = 0;
initInt();
@ -147,17 +147,19 @@ void CIO::process()
q31_t dcLevel = 0;
q31_t dcVals[20];
q31_t intSamp[20];
::arm_q15_to_q31((q15_t*)samples, intSamp, RX_BLOCK_SIZE);
::arm_biquad_cascade_df1_q31(&m_dcFilter, intSamp, dcVals, RX_BLOCK_SIZE);
q31_t q31Samples[20U];
::arm_q15_to_q31(samples, q31Samples, RX_BLOCK_SIZE);
::arm_biquad_cascade_df1_q31(&m_dcFilter, q31Samples, dcVals, RX_BLOCK_SIZE);
for (uint8_t i = 0U; i < RX_BLOCK_SIZE; i++)
dcLevel += dcVals[i];
dcLevel /= RX_BLOCK_SIZE;
q15_t offset = q15_t(dcLevel >> 16);
m_dcLevel = q15_t(dcLevel >> 16);
for (uint8_t i = 0U; i < RX_BLOCK_SIZE; i++)
samples[i] -= offset;
q15_t vals[RX_BLOCK_SIZE];
::arm_fir_fast_q15(&m_boxcarFilter, samples, vals, RX_BLOCK_SIZE);