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introduce getters for tuner parameters (gain, type)

This commit is contained in:
Dimitri Stolnikov 2012-06-02 01:11:47 +02:00
parent d5bfa3867f
commit 7bd3933c41
3 changed files with 115 additions and 29 deletions
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30
include/rtl-sdr.h
View File

@ -113,6 +113,34 @@ RTLSDR_API int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm);
RTLSDR_API int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev);
enum rtlsdr_tuner {
RTLSDR_TUNER_UNKNOWN = 0,
RTLSDR_TUNER_E4000,
RTLSDR_TUNER_FC0012,
RTLSDR_TUNER_FC0013,
RTLSDR_TUNER_FC2580
};
/*!
* Get the tuner type.
*
* \param dev the device handle given by rtlsdr_open()
* \return <= 0 on error, tuner type otherwise
*/
RTLSDR_API enum rtlsdr_tuner rtlsdr_get_tuner_type(rtlsdr_dev_t *dev);
/*!
* Get a list of gains supported by the tuner.
*
* NOTE: The gains argument must be preallocated by the caller. If NULL is
* being given instead, the number of available gain values will be returned.
*
* \param dev the device handle given by rtlsdr_open()
* \param gains array of gain values. In tenths of a dB, 115 means 11.5 dB.
* \return <= 0 on error, number of available (returned) gain values otherwise
*/
RTLSDR_API int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains);
/*!
* Set the gain for the device.
* Manual gain mode must be enabled for this to work.
@ -121,6 +149,8 @@ RTLSDR_API int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev);
* -10, 15, 40, 65, 90, 115, 140, 165, 190,
* 215, 240, 290, 340, 420, 430, 450, 470, 490
*
* Valid gain values may be queried with \ref rtlsdr_get_tuner_gains function.
*
* \param dev the device handle given by rtlsdr_open()
* \param gain in tenths of a dB, 115 means 11.5 dB.
* \return 0 on success

104
src/librtlsdr.c
View File

@ -45,7 +45,7 @@
#include "tuner_fc0013.h"
#include "tuner_fc2580.h"
typedef struct rtlsdr_tuner {
typedef struct rtlsdr_tuner_iface {
/* tuner interface */
int (*init)(void *);
int (*exit)(void *);
@ -53,7 +53,7 @@ typedef struct rtlsdr_tuner {
int (*set_bw)(void *, int bw /* Hz */);
int (*set_gain)(void *, int gain /* dB */);
int (*set_gain_mode)(void *, int manual);
} rtlsdr_tuner_t;
} rtlsdr_tuner_iface_t;
enum rtlsdr_async_status {
RTLSDR_INACTIVE = 0,
@ -75,7 +75,8 @@ struct rtlsdr_dev {
uint32_t rate; /* Hz */
uint32_t rtl_xtal; /* Hz */
/* tuner context */
rtlsdr_tuner_t *tuner;
enum rtlsdr_tuner tuner_type;
rtlsdr_tuner_iface_t *tuner;
uint32_t tun_xtal; /* Hz */
uint32_t freq; /* Hz */
int corr; /* ppm */
@ -130,9 +131,7 @@ int fc0012_set_freq(void *dev, uint32_t freq) {
return fc0012_set_params(dev, freq, 6000000);
}
int fc0012_set_bw(void *dev, int bw) { return 0; }
int _fc0012_set_gain(void *dev, int gain) {
return fc0012_set_gain(dev, gain);
}
int _fc0012_set_gain(void *dev, int gain) { return fc0012_set_gain(dev, gain); }
int fc0012_set_gain_mode(void *dev, int manual) { return 0; }
int _fc0013_init(void *dev) { return fc0013_init(dev); }
@ -143,9 +142,7 @@ int fc0013_set_freq(void *dev, uint32_t freq) {
return fc0013_set_params(dev, freq, 6000000);
}
int fc0013_set_bw(void *dev, int bw) { return 0; }
int _fc0013_set_gain(void *dev, int gain) {
return fc0013_set_gain(dev, gain);
}
int _fc0013_set_gain(void *dev, int gain) { return fc0013_set_gain(dev, gain); }
int fc0013_set_gain_mode(void *dev, int manual) { return 0; }
int fc2580_init(void *dev) { return fc2580_Initialize(dev); }
@ -153,20 +150,15 @@ int fc2580_exit(void *dev) { return 0; }
int _fc2580_set_freq(void *dev, uint32_t freq) {
return fc2580_SetRfFreqHz(dev, freq);
}
int fc2580_set_bw(void *dev, int bw) {
return fc2580_SetBandwidthMode(dev, 1);
}
int fc2580_set_bw(void *dev, int bw) { return fc2580_SetBandwidthMode(dev, 1); }
int fc2580_set_gain(void *dev, int gain) { return 0; }
int fc2580_set_gain_mode(void *dev, int manual) { return 0; }
enum rtlsdr_tuners {
RTLSDR_TUNER_E4000,
RTLSDR_TUNER_FC0012,
RTLSDR_TUNER_FC0013,
RTLSDR_TUNER_FC2580
};
static rtlsdr_tuner_t tuners[] = {
/* definition order must match enum rtlsdr_tuner */
static rtlsdr_tuner_iface_t tuners[] = {
{
NULL, NULL, NULL, NULL, NULL, NULL /* dummy for unknown tuners */
},
{
e4000_init, e4000_exit,
e4000_set_freq, e4000_set_bw, e4000_set_gain,
@ -673,6 +665,56 @@ int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
return dev->corr;
}
enum rtlsdr_tuner rtlsdr_get_tuner_type(rtlsdr_dev_t *dev)
{
if (!dev)
return -1;
return dev->tuner_type;
}
int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains)
{
const int e4k_gains[] = { -10, 15, 40, 65, 90, 115, 140, 165, 190, 215,
240, 290, 340, 420, 430, 450, 470, 490 };
const int fc0012_gains[] = { 0 /* no gain values */ };
const int fc0013_gains[] = { -63, 71, 191, 197 };
const int fc2580_gains[] = { 0 /* no gain values */ };
int *ptr = NULL;
int len = 0;
if (!dev)
return -1;
switch (dev->tuner_type) {
case RTLSDR_TUNER_E4000:
ptr = (int *)e4k_gains; len = sizeof(e4k_gains);
break;
case RTLSDR_TUNER_FC0012:
ptr = (int *)fc0012_gains; len = sizeof(fc0012_gains);
break;
case RTLSDR_TUNER_FC0013:
ptr = (int *)fc0013_gains; len = sizeof(fc0013_gains);
break;
case RTLSDR_TUNER_FC2580:
ptr = (int *)fc2580_gains; len = sizeof(fc2580_gains);
break;
default:
fprintf(stderr, "Invalid tuner type %d\n", dev->tuner_type);
break;
}
if (!gains) { /* no buffer provided, just return the count */
return len / sizeof(int);
} else {
if (len)
memcpy(gains, ptr, len);
return len / sizeof(int);
}
}
int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain)
{
int r = 0;
@ -972,7 +1014,7 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
reg = rtlsdr_i2c_read_reg(dev, E4K_I2C_ADDR, E4K_CHECK_ADDR);
if (reg == E4K_CHECK_VAL) {
fprintf(stderr, "Found Elonics E4000 tuner\n");
dev->tuner = &tuners[RTLSDR_TUNER_E4000];
dev->tuner_type = RTLSDR_TUNER_E4000;
goto found;
}
@ -980,7 +1022,7 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
if (reg == FC0013_CHECK_VAL) {
fprintf(stderr, "Found Fitipower FC0013 tuner\n");
rtlsdr_set_gpio_output(dev, 6);
dev->tuner = &tuners[RTLSDR_TUNER_FC0013];
dev->tuner_type = RTLSDR_TUNER_FC0013;
goto found;
}
@ -994,7 +1036,7 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
reg = rtlsdr_i2c_read_reg(dev, FC2580_I2C_ADDR, FC2580_CHECK_ADDR);
if ((reg & 0x7f) == FC2580_CHECK_VAL) {
fprintf(stderr, "Found FCI 2580 tuner\n");
dev->tuner = &tuners[RTLSDR_TUNER_FC2580];
dev->tuner_type = RTLSDR_TUNER_FC2580;
goto found;
}
@ -1002,18 +1044,22 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
if (reg == FC0012_CHECK_VAL) {
fprintf(stderr, "Found Fitipower FC0012 tuner\n");
rtlsdr_set_gpio_output(dev, 6);
dev->tuner = &tuners[RTLSDR_TUNER_FC0012];
dev->tuner_type = RTLSDR_TUNER_FC0012;
goto found;
}
found:
if (dev->tuner) {
dev->tun_xtal = dev->rtl_xtal;
if (dev->tuner->init)
r = dev->tuner->init(dev);
if (dev->tuner_type == RTLSDR_TUNER_UNKNOWN) {
r = -1;
goto err;
}
dev->tuner = &tuners[dev->tuner_type];
dev->tun_xtal = dev->rtl_xtal;
if (dev->tuner->init)
r = dev->tuner->init(dev);
rtlsdr_set_i2c_repeater(dev, 0);
*out_dev = dev;

10
src/rtl_test.c
View File

@ -160,6 +160,8 @@ int main(int argc, char **argv)
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int device_count;
int count;
int gains[100];
while ((opt = getopt(argc, argv, "d:s:b:tS::")) != -1) {
switch (opt) {
@ -228,6 +230,14 @@ int main(int argc, char **argv)
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
count = rtlsdr_get_tuner_gains(dev, NULL);
fprintf(stderr, "Supported gain values (%d): ", count);
count = rtlsdr_get_tuner_gains(dev, gains);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)