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librtlsdr
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rtl_test: abort tuner range test, for error -4 == LIBUSB_ERROR_NO_DEVICE 

* abort early - before flooding the terminal

Signed-off-by: hayati ayguen <h_ayguen@web.de>
development
hayati ayguen 2020-08-21 15:57:10 -07:00
parent e315a41ec5
commit 04ce5ec246
1 changed files with 55 additions and 5 deletions
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60
src/rtl_test.c
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@ -27,6 +27,8 @@
#include <stdlib.h>
#include <math.h>
#include <libusb.h>
#ifdef __APPLE__
#include <sys/time.h>
#else
@ -289,11 +291,35 @@ static void report_band(uint32_t low, uint32_t high) {
fprintf(stderr, "Tuning band: %u - %u Hz\n\n", low, high);
}
static int set_center_freq_wait(rtlsdr_dev_t *dev, uint32_t freq, const char * state_text) {
int rcA, rcB;
rcA = rtlsdr_set_center_freq(dev, freq);
if ( rcA == LIBUSB_ERROR_NO_DEVICE ) {
fprintf(stderr, "%s: Got Error -4 for frequency %u .. retry after wait ..\n", state_text, (unsigned)freq);
#ifdef _WIN32
Sleep(5);
#else
usleep(5000);
#endif
rcB = rtlsdr_set_center_freq(dev, freq);
if ( rcB == LIBUSB_ERROR_NO_DEVICE ) {
fprintf(stderr, "%s: Got Error -4 .. again. Giving Up!\n", state_text);
return rcB;
}
fprintf(stderr, "%s: Now return code %d at retry.\n", state_text, rcB);
return rcB;
}
return rcA;
}
void tuner_benchmark(void)
{
uint32_t current = max_step(0);
uint32_t band_start = 0;
uint32_t low_bound = 0, high_bound = 0;
int rc;
char buf[20];
enum { FIND_START, REFINE_START, FIND_END, REFINE_END } state;
@ -307,7 +333,8 @@ void tuner_benchmark(void)
*/
/* handle bands starting at 0Hz */
if (rtlsdr_set_center_freq(dev, 0) < 0)
rc = set_center_freq_wait(dev, 0, "FIND_START");
if (rc < 0)
state = FIND_START;
else {
band_start = 0;
@ -319,7 +346,12 @@ void tuner_benchmark(void)
switch (state) {
case FIND_START:
/* scanning for the start of a new band */
if (rtlsdr_set_center_freq(dev, current) < 0) {
rc = set_center_freq_wait(dev, current, "FIND_START");
if (rc < 0) {
if ( rc == LIBUSB_ERROR_NO_DEVICE ) {
do_exit = 1;
break;
}
/* still looking for a band */
low_bound = current;
current += max_step(current);
@ -334,7 +366,8 @@ void tuner_benchmark(void)
case REFINE_START:
/* refining the start of a band */
/* low_bound < bandstart <= high_bound */
if (rtlsdr_set_center_freq(dev, current) == 0) {
rc = set_center_freq_wait(dev, current, "REFINE_START");
if (rc == 0) {
/* current is inside the band */
/* low_bound < bandstart <= current */
if (current - low_bound <= min_step(current)) {
@ -350,6 +383,10 @@ void tuner_benchmark(void)
current = (current + low_bound) / 2;
}
} else {
if ( rc == LIBUSB_ERROR_NO_DEVICE ) {
do_exit = 1;
break;
}
/* current is outside the band */
/* current < bandstart <= high_bound */
if (high_bound - current <= min_step(current)) {
@ -368,11 +405,16 @@ void tuner_benchmark(void)
case FIND_END:
/* scanning for the end of the current band */
if (rtlsdr_set_center_freq(dev, current) == 0) {
rc = set_center_freq_wait(dev, current, "FIND_END");
if (rc == 0) {
/* still looking for the end of the band */
low_bound = current;
current += max_step(current);
} else {
if ( rc == LIBUSB_ERROR_NO_DEVICE ) {
do_exit = 1;
break;
}
/* end found, coarsely */
/* low_bound <= bandend < current, refine it */
high_bound = current;
@ -383,7 +425,12 @@ void tuner_benchmark(void)
case REFINE_END:
/* refining the end of a band */
/* low_bound <= bandend < high_bound */
if (rtlsdr_set_center_freq(dev, current) < 0) {
rc = set_center_freq_wait(dev, current, "REFINE_END");
if (rc < 0) {
if ( rc == LIBUSB_ERROR_NO_DEVICE ) {
do_exit = 1;
break;
}
/* current is outside the band */
/* low_bound <= bandend < current */
if (current - low_bound <= min_step(current)) {
@ -416,6 +463,9 @@ void tuner_benchmark(void)
}
}
if ( rc == LIBUSB_ERROR_NO_DEVICE )
return;
if (state == FIND_END)
report_band(band_start, current);
else if (state == REFINE_END)