HWA_ComplexMultiply Struct Reference

Detailed Description

HWA Paramset Config for ComplexMultiply block.

HWA paramset config parameters for the ComplexMultiply block inside HWA_ParamConfig which is used with the HWA_ConfigParamSet() call.

Data Fields
uint8_t	cmultMode
union {
struct {
uint16_t   freqShiftTwiddleIncr
}   freqShift
struct {
uint16_t   startFreq
}   slowDFT
struct {
uint16_t   twiddlePattern
uint8_t   winInterpolateMode
}   FFTstitching
struct {
uint8_t   scaleCmultScaleEn
}   scalerMultiply
struct {
uint8_t   cmultScaleEn
uint16_t   vecMultiMode1RamAddrOffset
}   vectorMultiplyMode1
struct {
uint16_t   vecMultiMode2RamAddrOffset
}   vectorMultiplyMode2
struct {
uint8_t   recwinModeSel
}   recursiveWin
struct {
uint16_t   ramAddrOffset
uint8_t   ramIdxIncrMode
}   lutFreqDerotate
struct {
uint16_t   twiddleIncr
}   freqShiftWithFreIncrement
}	modeCfg

Field Documentation

cmultMode

uint8_t HWA_ComplexMultiply::cmultMode

See HWA_COMPLEX_MULTIPLY_MODE macros for correct values. Configuration for the Complex Multiplier block. Set it into HWA_COMPLEX_MULTIPLY_MODE_DISABLE to disable the complex multiply block Sets the CMULT_MODE in the PRE_PROCESSING register in paramset

freqShiftTwiddleIncr

uint16_t HWA_ComplexMultiply::freqShiftTwiddleIncr

14 bit value: specifies the de-rotation frequency if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_FREQ_SHIFTER sets the TWID_INCR bits in TWID_INCR register

freqShift

struct { ... } HWA_ComplexMultiply::freqShift

startFreq

uint16_t HWA_ComplexMultiply::startFreq

14 bit value: specifies the starting frequency for DFT, if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_SLOW_DFT. and HWA_CommonConfig::twiddleDeltaFrac should be set to zero, the phase change is provided by the HWA_AccelModeFFT::fftSize. sets TWID_INCR bits in TWID_INCR register

slowDFT

struct { ... } HWA_ComplexMultiply::slowDFT

twiddlePattern

uint16_t HWA_ComplexMultiply::twiddlePattern

specify the twiddler factor pattern,if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_FFT_STITCHING, (FFT stitching mode), see HWA_FFT_STITCHING_TWID_PATTERN macros for the correct values, sets 2 lsb bits of TWID_INCR bits in TWID_INCR register

winInterpolateMode

uint8_t HWA_ComplexMultiply::winInterpolateMode

2 bit value: See HWA_FFT_WINDOW_INTERPOLATE_MODE macros for correct values. Configures linear interpolation for the window coefficients, which is relevant for large-size FFT computation (i.e., FFT sizes of 4K, 8K) that is obtained via stitching multiple smaller-size FFTs. (Note: winSymm should be set to 0 when using 4K or 8K mode) Sets the WINDOW_INTERP_FRACTION bits of register POSTPROCWIN in paramset

FFTstitching

struct { ... } HWA_ComplexMultiply::FFTstitching

scaleCmultScaleEn

uint8_t HWA_ComplexMultiply::scaleCmultScaleEn

see HWA_FEATURE_BIT macros for the correct values, it is applied if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_SCALAR_MULT, if it is enabled, the input samples are multiplied by 12 different scalar, programmed in HWA_CommonConfig::Iscale[HWA_NUM_RXCHANNELS], and HWA_CommonConfig::Qscale[HWA_NUM_RXCHANNELS]. per iteration based on REG_BCNT. if it is disabeld, a constant complex scalar HWA_CommonConfig::Iscale[0], and HWA_CommonConfig::Qscale[0] is applied to all samples sets CMULT_SCALE_EN bits of PRE_PROCESSING register in paramset

scalerMultiply

struct { ... } HWA_ComplexMultiply::scalerMultiply

cmultScaleEn

uint8_t HWA_ComplexMultiply::cmultScaleEn

see HWA_FEATURE_BIT macros for the correct values, if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_VECTOR_MULT. if it is enabled, the input samples are multiplied successively by 12 different complex values,, programmed in HWA_CommonConfig::Iscale[HWA_NUM_RXCHANNELS], and HWA_CommonConfig::Qscale[HWA_NUM_RXCHANNELS]. If it is disabled, the input samples are multiplied by upto 1024 complex samples saved in internal RAM. Sets the CMULT_SCALE_EN bits of PRE_PROCESSING register in paramset

vecMultiMode1RamAddrOffset

uint16_t HWA_ComplexMultiply::vecMultiMode1RamAddrOffset

specifies an address offset for RAM, if HWA_ComplexMultiply::cmultScaleEn is disabled sets the 12 msb in TWID_INCR bits in TWID_INCR register, the 2 lsb must kept to 0

vectorMultiplyMode1

struct { ... } HWA_ComplexMultiply::vectorMultiplyMode1

vecMultiMode2RamAddrOffset

uint16_t HWA_ComplexMultiply::vecMultiMode2RamAddrOffset

specifies an address offset for RAM, if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_VECTOR_MULT_2 sets the 12 msb in TWID_INCR bits in TWID_INCR register, the 2 lsb must kept to 0

vectorMultiplyMode2

struct { ... } HWA_ComplexMultiply::vectorMultiplyMode2

recwinModeSel

uint8_t HWA_ComplexMultiply::recwinModeSel

see HWA_RECURSIVE_WIN_MODE_SELECT macro for the correct values, applied to HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_RECURSIVE_WIN mode. sets the bits RECWIN_MODE_SEL of register PREPROC in paramset

recursiveWin

struct { ... } HWA_ComplexMultiply::recursiveWin

ramAddrOffset

uint16_t HWA_ComplexMultiply::ramAddrOffset

specifies an address offset for RAM, if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_LUT_FREQ_DEROTATE sets the 6 lsb in TWID_INCR bits in TWID_INCR register

ramIdxIncrMode

uint8_t HWA_ComplexMultiply::ramIdxIncrMode

see HWA_LUT_FREQ_DEROTATE_RAMIDX_INCR for the correct values sets bit 13, and 12 of TWID_INCR bits in TWID_INCR register

lutFreqDerotate

struct { ... } HWA_ComplexMultiply::lutFreqDerotate

twiddleIncr

uint16_t HWA_ComplexMultiply::twiddleIncr

14 bit value: specifies the de-rotation frequency if HWA_ComplexMultiply::cmultMode is set to HWA_COMPLEX_MULTIPLY_MODE_FREQSHIFT_FREQINCRE sets the TWID_INCR bits in TWID_INCR register

freqShiftWithFreIncrement

struct { ... } HWA_ComplexMultiply::freqShiftWithFreIncrement

modeCfg

union { ... } HWA_ComplexMultiply::modeCfg