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introduce getters for tuner parameters (gain, type)

This commit is contained in:
Dimitri Stolnikov 2012-06-02 01:14:31 +02:00
parent a2382d66d8
commit 292a986830
3 changed files with 43 additions and 0 deletions
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14
software/libosmosdr/include/osmosdr.h
View File

@ -109,6 +109,18 @@ OSMOSDR_API int osmosdr_set_center_freq(osmosdr_dev_t *dev, uint32_t freq);
*/
OSMOSDR_API uint32_t osmosdr_get_center_freq(osmosdr_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 osmosdr_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
*/
OSMOSDR_API int osmosdr_get_tuner_gains(osmosdr_dev_t *dev, int *gains);
/*!
* Set the gain for the device.
* Manual gain mode must be enabled for this to work.
@ -117,6 +129,8 @@ OSMOSDR_API uint32_t osmosdr_get_center_freq(osmosdr_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 osmosdr_get_tuner_gains function.
*
* \param dev the device handle given by osmosdr_open()
* \param gain in tenths of a dB, 115 means 11.5 dB.
* \return 0 on success

19
software/libosmosdr/src/libosmosdr.c
View File

@ -332,6 +332,25 @@ uint32_t osmosdr_get_center_freq(osmosdr_dev_t *dev)
return dev->freq;
}
int osmosdr_get_tuner_gains(osmosdr_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 };
int len = sizeof(e4k_gains);
if (!dev)
return -1;
if (!gains) { /* no buffer provided, just return the count */
return len / sizeof(int);
} else {
if (len)
memcpy(gains, e4k_gains, len);
return len / sizeof(int);
}
}
int osmosdr_set_tuner_gain(osmosdr_dev_t *dev, int gain)
{
int r = 0;

10
software/libosmosdr/src/osmo_sdr.c
View File

@ -108,6 +108,9 @@ int main(int argc, char **argv)
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int device_count;
char vendor[256] = { 0 }, product[256] = { 0 }, serial[256] = { 0 };
int count;
int gains[100];
#ifndef _WIN32
while ((opt = getopt(argc, argv, "d:f:g:s:b:S::")) != -1) {
switch (opt) {
@ -194,6 +197,13 @@ int main(int argc, char **argv)
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
count = osmosdr_get_tuner_gains(dev, NULL);
fprintf(stderr, "Supported gain values (%d): ", count);
count = osmosdr_get_tuner_gains(dev, gains);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
r = osmosdr_get_usb_strings(dev, vendor, product, serial);
if (r < 0)