diff options
Diffstat (limited to 'include/rtl-sdr.h')
| -rw-r--r-- | include/rtl-sdr.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/rtl-sdr.h b/include/rtl-sdr.h index 8a6dd38..e5b3f75 100644 --- a/include/rtl-sdr.h +++ b/include/rtl-sdr.h @@ -39,6 +39,36 @@ RTLSDR_API int rtlsdr_close(rtlsdr_dev_t *dev); /* configuration functions */ +/*! + * Set crystal oscillator frequencies used for the RTL2832 and the tuner IC. + * + * Usually both ICs use the same clock. Changing the clock may make sense if + * you are applying an external clock to the tuner or to compensate the + * frequency (and samplerate) error caused by the original cheap crystal. + * + * NOTE: Call this function only if you know what you are doing. + * + * \param dev the device handle given by rtlsdr_open() + * \param rtl_freq frequency value used to clock the RTL2832 in Hz + * \param tuner_freq frequency value used to clock the tuner IC in Hz + * \return 0 on success + */ +RTLSDR_API int rtlsdr_set_xtal_freq(rtlsdr_dev_t *dev, uint32_t rtl_freq, + uint32_t tuner_freq); + +/*! + * Get crystal oscillator frequencies used for the RTL2832 and the tuner IC. + * + * Usually both ICs use the same clock. + * + * \param dev the device handle given by rtlsdr_open() + * \param rtl_freq frequency value used to clock the RTL2832 in Hz + * \param tuner_freq frequency value used to clock the tuner IC in Hz + * \return 0 on success + */ +RTLSDR_API int rtlsdr_get_xtal_freq(rtlsdr_dev_t *dev, uint32_t *rtl_freq, + uint32_t *tuner_freq); + RTLSDR_API int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq); /*! |