Sojus07/hackrf
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

code cleanup

Browse Source
This commit is contained in:
Michael Ossmann
2017-02-07 21:11:50 -07:00
parent c68aedef31
commit 5ab315a73a
1 changed files with 66 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

136
host/hackrf-tools/src/hackrf_sweep.c
View File

@ -1,6 +1,7 @@
/* /*
* Copyright 2016 Dominic Spill <dominicgs@gmail.com> * Copyright 2016 Dominic Spill <dominicgs@gmail.com>
* Copyright 2016 Mike Walters <mike@flomp.net> * Copyright 2016 Mike Walters <mike@flomp.net>
* Copyright 2017 Michael Ossmann <mike@ossmann.com>
* *
* This file is part of HackRF. * This file is part of HackRF.
* *
@ -193,84 +194,79 @@ float logPower(fftwf_complex in, float scale)
} }
int rx_callback(hackrf_transfer* transfer) { int rx_callback(hackrf_transfer* transfer) {
/* This is where we need to do interesting things with the samples
* FFT
* Throw away unused bins
* write output to pipe
*/
int8_t* buf; int8_t* buf;
uint8_t* ubuf; uint8_t* ubuf;
uint64_t frequency; /* in Hz */ uint64_t frequency; /* in Hz */
float float_freq; float float_freq;
int i, j; int i, j;
if( fd != NULL ) { if(NULL == fd) {
byte_count += transfer->valid_length;
buf = (int8_t*) transfer->buffer;
for(j=0; j<BLOCKS_PER_TRANSFER; j++) {
ubuf = (uint8_t*) buf;
if(ubuf[0] == 0x7F && ubuf[1] == 0x7F) {
frequency = ((uint64_t)(ubuf[9]) << 56) | ((uint64_t)(ubuf[8]) << 48) | ((uint64_t)(ubuf[7]) << 40)
| ((uint64_t)(ubuf[6]) << 32) | ((uint64_t)(ubuf[5]) << 24) | ((uint64_t)(ubuf[4]) << 16)
| ((uint64_t)(ubuf[3]) << 8) | ubuf[2];
} else {
buf += SAMPLES_PER_BLOCK;
break;
}
if((FREQ_MAX_MHZ * FREQ_ONE_MHZ) < frequency) {
buf += SAMPLES_PER_BLOCK;
break;
}
/* copy to fftwIn as floats */
buf += SAMPLES_PER_BLOCK - (fftSize * 2);
for(i=0; i < fftSize; i++) {
fftwIn[i][0] = buf[i*2] * window[i] * 1.0f / 128.0f;
fftwIn[i][1] = buf[i*2+1] * window[i] * 1.0f / 128.0f;
}
buf += fftSize * 2;
fftwf_execute(fftwPlan);
for (i=0; i < fftSize; i++) {
pwr[i] = logPower(fftwOut[i], 1.0f / fftSize);
}
if(binary_output) {
float_freq = frequency + DEFAULT_SAMPLE_RATE_HZ / 4;
float_freq /= FREQ_ONE_MHZ;
fwrite(&float_freq, sizeof(float), 1, stdout);
fwrite(&pwr[1+(fftSize*5)/8], sizeof(float), fftSize/4, stdout);
float_freq = frequency + DEFAULT_SAMPLE_RATE_HZ / 2;
float_freq /= FREQ_ONE_MHZ;
fwrite(&float_freq, sizeof(float), 1, stdout);
fwrite(&pwr[1+fftSize/8], sizeof(float), fftSize/4, stdout);
} else {
time_now = time(NULL);
fft_time = localtime(&time_now);
strftime(time_str, 50, "%Y-%m-%d, %H:%M:%S", fft_time);
printf("%s, %" PRIu64 ", %" PRIu64 ", %.2f, %u",
time_str,
(uint64_t)(frequency),
(uint64_t)(frequency+DEFAULT_SAMPLE_RATE_HZ/4),
(float)fft_bin_width,
fftSize);
for(i=1+(fftSize*5)/8; (1+(fftSize*7)/8) > i; i++) {
printf(", %.2f", pwr[i]);
}
printf("\n");
printf("%s, %" PRIu64 ", %" PRIu64 ", %.2f, %u",
time_str,
(uint64_t)(frequency+(DEFAULT_SAMPLE_RATE_HZ/2)),
(uint64_t)(frequency+((DEFAULT_SAMPLE_RATE_HZ*3)/4)),
(float)fft_bin_width,
fftSize);
for(i=1+fftSize/8; (1+(fftSize*3)/8) > i; i++) {
printf(", %.2f", pwr[i]);
}
printf("\n");
}
}
return 0;
} else {
return -1; return -1;
} }
byte_count += transfer->valid_length;
buf = (int8_t*) transfer->buffer;
for(j=0; j<BLOCKS_PER_TRANSFER; j++) {
ubuf = (uint8_t*) buf;
if(ubuf[0] == 0x7F && ubuf[1] == 0x7F) {
frequency = ((uint64_t)(ubuf[9]) << 56) | ((uint64_t)(ubuf[8]) << 48) | ((uint64_t)(ubuf[7]) << 40)
| ((uint64_t)(ubuf[6]) << 32) | ((uint64_t)(ubuf[5]) << 24) | ((uint64_t)(ubuf[4]) << 16)
| ((uint64_t)(ubuf[3]) << 8) | ubuf[2];
} else {
buf += SAMPLES_PER_BLOCK;
break;
}
if((FREQ_MAX_MHZ * FREQ_ONE_MHZ) < frequency) {
buf += SAMPLES_PER_BLOCK;
break;
}
/* copy to fftwIn as floats */
buf += SAMPLES_PER_BLOCK - (fftSize * 2);
for(i=0; i < fftSize; i++) {
fftwIn[i][0] = buf[i*2] * window[i] * 1.0f / 128.0f;
fftwIn[i][1] = buf[i*2+1] * window[i] * 1.0f / 128.0f;
}
buf += fftSize * 2;
fftwf_execute(fftwPlan);
for (i=0; i < fftSize; i++) {
pwr[i] = logPower(fftwOut[i], 1.0f / fftSize);
}
if(binary_output) {
float_freq = frequency + DEFAULT_SAMPLE_RATE_HZ / 4;
float_freq /= FREQ_ONE_MHZ;
fwrite(&float_freq, sizeof(float), 1, stdout);
fwrite(&pwr[1+(fftSize*5)/8], sizeof(float), fftSize/4, stdout);
float_freq = frequency + DEFAULT_SAMPLE_RATE_HZ / 2;
float_freq /= FREQ_ONE_MHZ;
fwrite(&float_freq, sizeof(float), 1, stdout);
fwrite(&pwr[1+fftSize/8], sizeof(float), fftSize/4, stdout);
} else {
time_now = time(NULL);
fft_time = localtime(&time_now);
strftime(time_str, 50, "%Y-%m-%d, %H:%M:%S", fft_time);
printf("%s, %" PRIu64 ", %" PRIu64 ", %.2f, %u",
time_str,
(uint64_t)(frequency),
(uint64_t)(frequency+DEFAULT_SAMPLE_RATE_HZ/4),
(float)fft_bin_width,
fftSize);
for(i=1+(fftSize*5)/8; (1+(fftSize*7)/8) > i; i++) {
printf(", %.2f", pwr[i]);
}
printf("\n");
printf("%s, %" PRIu64 ", %" PRIu64 ", %.2f, %u",
time_str,
(uint64_t)(frequency+(DEFAULT_SAMPLE_RATE_HZ/2)),
(uint64_t)(frequency+((DEFAULT_SAMPLE_RATE_HZ*3)/4)),
(float)fft_bin_width,
fftSize);
for(i=1+fftSize/8; (1+(fftSize*3)/8) > i; i++) {
printf(", %.2f", pwr[i]);
}
printf("\n");
}
}
return 0;
} }
static void usage() { static void usage() {