mirror/rtl-sdr-blog
1
0
Fork 0
mirror of https://github.com/rtlsdrblog/rtl-sdr-blog.git synced 2025-10-31 00:48:08 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

cosmetic fixes/cleanup

Browse Source 
Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Steve Markgraf
2012-03-31 14:32:18 +02:00
parent 542533c229
commit ffea5061f0
2 changed files with 150 additions and 161 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/main.c
View File

@@ -51,7 +51,7 @@ int main(int argc, char **argv)
char *filename = NULL;
uint32_t frequency = 0, samp_rate = 2048000;
uint8_t buffer[READLEN];
uint32_t n_read;
uint32_t n_read;
FILE *file;
rtlsdr_dev_t *dev = NULL;
@@ -75,19 +75,19 @@ int main(int argc, char **argv)
filename = argv[optind];
}
rtlsdr_init();
rtlsdr_init();
int device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
int device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
printf("Found %d device(s).\n", device_count);
printf("Found %d device(s).\n", device_count);
dev = rtlsdr_open(0); /* open the first device */
dev = rtlsdr_open(0); /* open the first device */
if (NULL == dev) {
fprintf(stderr, "Failed to open rtlsdr device.\n");
fprintf(stderr, "Failed to open rtlsdr device.\n");
exit(1);
}
@@ -99,16 +99,14 @@ int main(int argc, char **argv)
sigaction(SIGQUIT, &sigact, NULL);
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
}
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, frequency);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to set center freq.\n");
}
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
file = fopen(filename, "wb");
@@ -119,16 +117,15 @@ int main(int argc, char **argv)
/* Reset endpoint before we start reading from it */
r = rtlsdr_reset_buffer(dev);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to reset buffers.\n");
}
if (r < 0)
fprintf(stderr, "WARNING: Failed to reset buffers.\n");
printf("Reading samples...\n");
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, READLEN, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
}
if (r < 0)
fprintf(stderr, "WARNING: sync read failed.\n");
fwrite(buffer, n_read, 1, file);
@@ -140,7 +137,7 @@ int main(int argc, char **argv)
fclose(file);
rtlsdr_exit();
rtlsdr_exit();
out:
return r >= 0 ? r : -r;
}

266
src/rtl-sdr.c
View File

@@ -43,55 +43,56 @@ int fc0012_set_bw(void *dev, int bw) { return 0; }
int fc0013_init(void *dev) { return FC0013_Open(dev); }
int fc0013_exit(void *dev) { return 0; }
int fc0013_tune(void *dev, int freq) {
/* read bandwidth mode to reapply it */
int bw = 0;
//fc0013_GetBandwidthMode(dev, &bw); // FIXME: missing
return FC0013_SetFrequency(dev, freq/1000, bw & 0xff);
/* read bandwidth mode to reapply it */
int bw = 0;
//fc0013_GetBandwidthMode(dev, &bw); // FIXME: missing
return FC0013_SetFrequency(dev, freq/1000, bw & 0xff);
}
int fc0013_set_bw(void *dev, int bw) {
/* read frequency to reapply it */
unsigned long freq = 0;
//fc0013_GetRfFreqHz(dev, &freq); // FIXME: missing
return FC0013_SetFrequency(dev, freq/1000, 8);
/* read frequency to reapply it */
unsigned long freq = 0;
//fc0013_GetRfFreqHz(dev, &freq); // FIXME: missing
return FC0013_SetFrequency(dev, freq/1000, 8);
}
enum rtlsdr_tuners {
RTLSDR_TUNER_UNDEF,
RTLSDR_TUNER_E4000,
RTLSDR_TUNER_FC0012,
RTLSDR_TUNER_FC0013
RTLSDR_TUNER_UNDEF,
RTLSDR_TUNER_E4000,
RTLSDR_TUNER_FC0012,
RTLSDR_TUNER_FC0013
};
typedef struct rtlsdr_tuner {
enum rtlsdr_tuners tuner;
int(*init)(void *);
int(*exit)(void *);
int(*tune)(void *, int freq /* Hz */);
int(*set_bw)(void *, int bw /* Hz */);
int freq; /* Hz */
int corr; /* ppm */
enum rtlsdr_tuners tuner;
int(*init)(void *);
int(*exit)(void *);
int(*tune)(void *, int freq /* Hz */);
int(*set_bw)(void *, int bw /* Hz */);
int freq; /* Hz */
int corr; /* ppm */
} rtlsdr_tuner_t;
rtlsdr_tuner_t tuners[] = {
{ RTLSDR_TUNER_E4000, e4k_init, e4k_exit, e4k_tune, e4k_set_bw, 0, 0 },
{ RTLSDR_TUNER_FC0012, fc0012_init, fc0012_exit, fc0012_tune, fc0012_set_bw, 0, 0 },
{ RTLSDR_TUNER_FC0013, fc0013_init, fc0013_exit, fc0013_tune, fc0013_set_bw, 0, 0 },
{ RTLSDR_TUNER_E4000, e4k_init, e4k_exit, e4k_tune, e4k_set_bw, 0, 0 },
{ RTLSDR_TUNER_FC0012, fc0012_init, fc0012_exit, fc0012_tune, fc0012_set_bw, 0, 0 },
{ RTLSDR_TUNER_FC0013, fc0013_init, fc0013_exit, fc0013_tune, fc0013_set_bw, 0, 0 },
};
struct rtlsdr_device {
uint16_t vid;
uint16_t pid;
} devices[] = {
{ 0x0bda, 0x2832, /*RTLSDR_TUNER_E4000,*/ }, /* default RTL2832U vid/pid (eg. hama nano) */
{ 0x0bda, 0x2838, /*RTLSDR_TUNER_E4000,*/ }, /* ezcap USB 2.0 DVB-T/DAB/FM stick */
{ 0x0ccd, 0x00b3, /*RTLSDR_TUNER_FC0013,*/ }, /* Terratec NOXON DAB/DAB+ USB-Stick */
{ 0x1f4d, 0xb803, /*RTLSDR_TUNER_FC0012,*/ }, /* GTek T803 */
{ 0x1b80, 0xd3a4, /*RTLSDR_TUNER_FC0013,*/ }, /* Twintech UT-40 */
{ 0x0bda, 0x2832 }, /* default RTL2832U vid/pid (eg. hama nano) */
{ 0x0bda, 0x2838 }, /* ezcap USB 2.0 DVB-T/DAB/FM stick */
{ 0x0ccd, 0x00b3 }, /* Terratec NOXON DAB/DAB+ USB-Stick */
{ 0x1f4d, 0xb803 }, /* GTek T803 */
{ 0x1b80, 0xd3a4 }, /* Twintech UT-40 */
};
typedef struct {
struct libusb_device_handle *devh;
rtlsdr_tuner_t *tuner;
rtlsdr_tuner_t *tuner;
} rtlsdr_dev_t;
#define CRYSTAL_FREQ 28800000
@@ -307,24 +308,19 @@ void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
{
rtlsdr_set_i2c_repeater(dev, 1);
rtlsdr_set_i2c_repeater(dev, 1);
if (dev->tuner) {
dev->tuner->freq = freq;
if (dev->tuner) {
dev->tuner->freq = freq;
double f = (double) freq;
f *= 1.0 + dev->tuner->corr / 1e6;
dev->tuner->tune((void *)dev, (int) f);
printf("Tuned to %i Hz\n", freq);
}
double f = (double) freq;
rtlsdr_set_i2c_repeater(dev, 0);
f *= 1.0 + dev->tuner->corr / 1e6;
dev->tuner->tune((void *)dev, (int) f);
printf("Tuned to %i Hz\n", freq);
}
rtlsdr_set_i2c_repeater(dev, 0);
return 0;
return 0;
}
int rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
@@ -334,89 +330,88 @@ int rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int32_t ppm)
{
if (dev->tuner) {
if (dev->tuner->corr == ppm)
return -1;
if (dev->tuner) {
if (dev->tuner->corr == ppm)
return -1;
dev->tuner->corr = ppm;
dev->tuner->corr = ppm;
/* retune to apply new correction value */
rtlsdr_set_center_freq(dev, dev->tuner->freq);
}
/* retune to apply new correction value */
rtlsdr_set_center_freq(dev, dev->tuner->freq);
}
return 0;
return 0;
}
int32_t rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
{
if (dev->tuner)
return dev->tuner->corr;
else
return 0;
if (dev->tuner)
return dev->tuner->corr;
else
return 0;
}
void rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
{
uint16_t tmp;
uint32_t rsamp_ratio;
double real_rate;
uint16_t tmp;
uint32_t rsamp_ratio;
double real_rate;
/* check for the maximum rate the resampler supports */
if (samp_rate > 3200000)
samp_rate = 3200000;
/* check for the maximum rate the resampler supports */
if (samp_rate > 3200000)
samp_rate = 3200000;
rsamp_ratio = (CRYSTAL_FREQ * pow(2, 22)) / samp_rate;
rsamp_ratio &= ~3;
rsamp_ratio = (CRYSTAL_FREQ * pow(2, 22)) / samp_rate;
rsamp_ratio &= ~3;
real_rate = (CRYSTAL_FREQ * pow(2, 22)) / rsamp_ratio;
printf("Setting sample rate: %.3f Hz\n", real_rate);
real_rate = (CRYSTAL_FREQ * pow(2, 22)) / rsamp_ratio;
printf("Setting sample rate: %.3f Hz\n", real_rate);
if (dev->tuner)
dev->tuner->set_bw((void *)dev, real_rate);
if (dev->tuner)
dev->tuner->set_bw((void *)dev, real_rate);
tmp = (rsamp_ratio >> 16);
rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2);
tmp = rsamp_ratio & 0xffff;
rtlsdr_demod_write_reg(dev, 1, 0xa1, tmp, 2);
tmp = (rsamp_ratio >> 16);
rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2);
tmp = rsamp_ratio & 0xffff;
rtlsdr_demod_write_reg(dev, 1, 0xa1, tmp, 2);
}
int rtlsdr_get_sample_rate(rtlsdr_dev_t *dev)
{
return 0; // TODO: implement
return 0; // TODO: implement
}
int rtlsdr_init(void)
{
return libusb_init(NULL);
return libusb_init(NULL);
}
void rtlsdr_exit(void)
{
libusb_exit(NULL);
libusb_exit(NULL);
}
uint32_t rtlsdr_get_device_count(void)
{
int i, j;
int i, j;
libusb_device **list;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
ssize_t cnt = libusb_get_device_list(NULL, &list);
for (i = 0; i < cnt; i++) {
libusb_get_device_descriptor(list[i], &dd);
for (i = 0; i < cnt; i++) {
libusb_get_device_descriptor(list[i], &dd);
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
if ( devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct ) {
device_count++;
}
}
}
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
if (devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct)
device_count++;
}
}
libusb_free_device_list(list, 0);
libusb_free_device_list(list, 0);
return device_count;
return device_count;
}
const char *rtlsdr_get_device_name(uint32_t index)
@@ -428,83 +423,82 @@ const char *rtlsdr_get_device_name(uint32_t index)
if (index > cnt - 1)
return NULL;
/*libusb_device *device = list[index];*/
/*libusb_device *device = list[index];*/
libusb_free_device_list(list, 0);
return "TODO: implement";
return "TODO: implement";
}
rtlsdr_dev_t *rtlsdr_open(int index)
{
int r;
int i, j;
libusb_device **list;
int i, j;
libusb_device **list;
rtlsdr_dev_t * dev = NULL;
libusb_device *device = NULL;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
libusb_device *device = NULL;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
dev = malloc(sizeof(rtlsdr_dev_t));
memset(dev, 0, sizeof(rtlsdr_dev_t));
memset(dev, 0, sizeof(rtlsdr_dev_t));
ssize_t cnt = libusb_get_device_list(NULL, &list);
for (i = 0; i < cnt; i++) {
device = list[i];
for (i = 0; i < cnt; i++) {
device = list[i];
libusb_get_device_descriptor(list[i], &dd);
libusb_get_device_descriptor(list[i], &dd);
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
if ( devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct ) {
device_count++;
for (j = 0; j < sizeof(devices)/sizeof(struct rtlsdr_device); j++ ) {
if ( devices[j].vid == dd.idVendor && devices[j].pid == dd.idProduct ) {
device_count++;
if (index == device_count - 1)
break;
}
}
if (index == device_count - 1)
break;
}
}
if (index == device_count - 1)
break;
if (index == device_count - 1)
break;
device = NULL;
}
device = NULL;
}
if (!device)
goto err;
if (!device)
goto err;
r = libusb_open(device, &dev->devh);
if (r < 0) {
libusb_free_device_list(list, 0);
fprintf(stderr, "usb_open error %d\n", r);
goto err;
}
r = libusb_open(device, &dev->devh);
if (r < 0) {
libusb_free_device_list(list, 0);
fprintf(stderr, "usb_open error %d\n", r);
goto err;
}
libusb_free_device_list(list, 0);
libusb_free_device_list(list, 0);
unsigned char buffer[256];
unsigned char buffer[256];
libusb_get_string_descriptor_ascii(dev->devh, 0, buffer, sizeof(buffer));
printf("sn#: %s\n", buffer);
libusb_get_string_descriptor_ascii(dev->devh, 0, buffer, sizeof(buffer) );
printf("sn#: %s\n", buffer);
libusb_get_string_descriptor_ascii(dev->devh, 1, buffer, sizeof(buffer));
printf("manufacturer: %s\n", buffer);
libusb_get_string_descriptor_ascii(dev->devh, 1, buffer, sizeof(buffer) );
printf("manufacturer: %s\n", buffer);
libusb_get_string_descriptor_ascii(dev->devh, 2, buffer, sizeof(buffer));
printf("product: %s\n", buffer);
libusb_get_string_descriptor_ascii(dev->devh, 2, buffer, sizeof(buffer) );
printf("product: %s\n", buffer);
r = libusb_claim_interface(dev->devh, 0);
if (r < 0) {
fprintf(stderr, "usb_claim_interface error %d\n", r);
goto err;
}
r = libusb_claim_interface(dev->devh, 0);
if (r < 0) {
fprintf(stderr, "usb_claim_interface error %d\n", r);
goto err;
}
rtlsdr_init_baseband(dev);
rtlsdr_init_baseband(dev);
// TODO: probe the tuner and set dev->tuner member to appropriate tuner object
// dev->tuner = &tuners[...];
// TODO: probe the tuner and set dev->tuner member to appropriate tuner object
// dev->tuner = &tuners[...];
return dev;
err:
@@ -514,12 +508,10 @@ err:
int rtlsdr_close(rtlsdr_dev_t *dev)
{
libusb_release_interface(dev->devh, 0);
libusb_close(dev->devh);
free(dev);
return 0;
return 0;
}
int rtlsdr_reset_buffer(rtlsdr_dev_t *dev)