Sojus07/hackrf
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This commit is contained in:
Mike Walters
2016-07-30 18:43:08 +01:00
parent d09e83e423
commit a5a1c8ce70
1 changed files with 8 additions and 2 deletions
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10
host/hackrf-tools/src/hackrf_sweep.c
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@ -168,6 +168,7 @@ fftwf_complex *fftwIn = NULL;
fftwf_complex *fftwOut = NULL; fftwf_complex *fftwOut = NULL;
fftwf_plan fftwPlan = NULL; fftwf_plan fftwPlan = NULL;
float* pwr; float* pwr;
float* window;
float logPower(fftwf_complex in, float scale) float logPower(fftwf_complex in, float scale)
{ {
@ -201,8 +202,8 @@ int rx_callback(hackrf_transfer* transfer) {
/* copy to fftwIn as floats */ /* copy to fftwIn as floats */
buf += 4; buf += 4;
for(i=0; i < fftSize; i++) { for(i=0; i < fftSize; i++) {
fftwIn[i][0] = buf[i*2] / 128.0f; fftwIn[i][0] = buf[i*2] * window[i] * 1.0f / 128.0f;
fftwIn[i][1] = buf[i*2+1] / 128.0f; fftwIn[i][1] = buf[i*2+1] * window[i] * 1.0f / 128.0f;
} }
buf = buf + 16380; buf = buf + 16380;
fftwf_execute(fftwPlan); fftwf_execute(fftwPlan);
@ -350,6 +351,11 @@ int main(int argc, char** argv) {
fftwOut = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize); fftwOut = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * fftSize);
fftwPlan = fftwf_plan_dft_1d(fftSize, fftwIn, fftwOut, FFTW_FORWARD, FFTW_MEASURE); fftwPlan = fftwf_plan_dft_1d(fftSize, fftwIn, fftwOut, FFTW_FORWARD, FFTW_MEASURE);
pwr = (float*)fftwf_malloc(sizeof(float) * fftSize); pwr = (float*)fftwf_malloc(sizeof(float) * fftSize);
window = (float*)fftwf_malloc(sizeof(float) * fftSize);
int i;
for (i = 0; i < fftSize; i++) {
window[i] = 0.5f * (1.0f - cos(2 * M_PI * i / (fftSize - 1)));
}
result = hackrf_init(); result = hackrf_init();
if( result != HACKRF_SUCCESS ) { if( result != HACKRF_SUCCESS ) {