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only enable auto-ds switching if ds mode from a UI is 0

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This commit is contained in:
rtlsdrblog
2023-08-27 16:04:35 +12:00
parent ef7651cc92
commit c79775f4b6
2 changed files with 24 additions and 3 deletions
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8
include/rtl-sdr.h
View File

@@ -29,6 +29,13 @@ extern "C" {
typedef struct rtlsdr_dev rtlsdr_dev_t;
enum rtlsdr_ds_mode {
RTLSDR_DS_IQ = 0, /* I/Q quadrature sampling of tuner output */
RTLSDR_DS_I, /* 1: direct sampling on I branch: usually not connected */
RTLSDR_DS_Q, /* 2: direct sampling on Q branch: HF on rtl-sdr v3 dongle */
};
RTLSDR_API uint32_t rtlsdr_get_device_count(void);
RTLSDR_API const char* rtlsdr_get_device_name(uint32_t index);
@@ -302,6 +309,7 @@ RTLSDR_API int rtlsdr_set_agc_mode(rtlsdr_dev_t *dev, int on);
* \param on 0 means disabled, 1 I-ADC input enabled, 2 Q-ADC input enabled
* \return 0 on success
*/
int _rtlsdr_set_direct_sampling(rtlsdr_dev_t *dev, int on);
RTLSDR_API int rtlsdr_set_direct_sampling(rtlsdr_dev_t *dev, int on);
/*!

19
src/librtlsdr.c
View File

@@ -122,6 +122,7 @@ struct rtlsdr_dev {
char manufact[256];
char product[256];
int force_bt;
enum rtlsdr_ds_mode direct_sampling_mode;
};
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val);
@@ -896,8 +897,12 @@ int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
if (last_ds < 0)
return 1;
/* Check if direct sampling should be enabled */
dev->direct_sampling = (freq < 28800000 && dev->tuner_type == RTLSDR_TUNER_R820T) ? 2 : 0;
/* Check if direct sampling should be enabled.
* Also only enable auto switch if ds mode is 0 (aka None, or standard mode)
*/
if(dev->direct_sampling_mode == 0) {
dev->direct_sampling = (freq < 28800000 && dev->tuner_type == RTLSDR_TUNER_R820T) ? 2 : 0;
}
if (dev->direct_sampling) {
rtlsdr_set_i2c_repeater(dev, 0);
@@ -917,7 +922,7 @@ int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
* the previous frequency back again
*/
if (last_ds != dev->direct_sampling) {
return rtlsdr_set_direct_sampling(dev, dev->direct_sampling);
return _rtlsdr_set_direct_sampling(dev, dev->direct_sampling);
}
return r;
@@ -1191,7 +1196,15 @@ int rtlsdr_set_agc_mode(rtlsdr_dev_t *dev, int on)
return rtlsdr_demod_write_reg(dev, 0, 0x19, on ? 0x25 : 0x05, 1);
}
int rtlsdr_set_direct_sampling(rtlsdr_dev_t *dev, int on)
{
/* When the UI sets the ds mode, remember the mode set */
dev->direct_sampling_mode = (enum rtlsdr_ds_mode)on;
return _rtlsdr_set_direct_sampling(dev, on);
}
int _rtlsdr_set_direct_sampling(rtlsdr_dev_t *dev, int on)
{
int r = 0;