/* * rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver * Copyright (C) 2012-2013 by Steve Markgraf * Copyright (C) 2012 by Dimitri Stolnikov * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #ifndef __RTL_SDR_H #define __RTL_SDR_H #ifdef __cplusplus extern "C" { #endif #include #include 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); /*! * Get USB device strings. * * NOTE: The string arguments must provide space for up to 256 bytes. * * \param index the device index * \param manufact manufacturer name, may be NULL * \param product product name, may be NULL * \param serial serial number, may be NULL * \return 0 on success */ RTLSDR_API int rtlsdr_get_device_usb_strings(uint32_t index, char *manufact, char *product, char *serial); /*! * Get device index by USB serial string descriptor. * * \param serial serial string of the device * \return device index of first device where the name matched * \return -1 if name is NULL * \return -2 if no devices were found at all * \return -3 if devices were found, but none with matching name */ RTLSDR_API int rtlsdr_get_index_by_serial(const char *serial); RTLSDR_API int rtlsdr_open(rtlsdr_dev_t **dev, uint32_t index); 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 fully understand the implications. * * \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); /*! * Get USB device strings. * * NOTE: The string arguments must provide space for up to 256 bytes. * * \param dev the device handle given by rtlsdr_open() * \param manufact manufacturer name, may be NULL * \param product product name, may be NULL * \param serial serial number, may be NULL * \return 0 on success */ RTLSDR_API int rtlsdr_get_usb_strings(rtlsdr_dev_t *dev, char *manufact, char *product, char *serial); /*! * Write the device EEPROM * * \param dev the device handle given by rtlsdr_open() * \param data buffer of data to be written * \param offset address where the data should be written * \param len length of the data * \return 0 on success * \return -1 if device handle is invalid * \return -2 if EEPROM size is exceeded * \return -3 if no EEPROM was found */ RTLSDR_API int rtlsdr_write_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len); /*! * Read the device EEPROM * * \param dev the device handle given by rtlsdr_open() * \param data buffer where the data should be written * \param offset address where the data should be read from * \param len length of the data * \return 0 on success * \return -1 if device handle is invalid * \return -2 if EEPROM size is exceeded * \return -3 if no EEPROM was found */ RTLSDR_API int rtlsdr_read_eeprom(rtlsdr_dev_t *dev, uint8_t *data, uint8_t offset, uint16_t len); RTLSDR_API int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq); /*! * Get actual frequency the device is tuned to. * * \param dev the device handle given by rtlsdr_open() * \return 0 on error, frequency in Hz otherwise */ RTLSDR_API uint32_t rtlsdr_get_center_freq(rtlsdr_dev_t *dev); /*! * Set the frequency correction value for the device. * * \param dev the device handle given by rtlsdr_open() * \param ppm correction value in parts per million (ppm) * \return 0 on success */ RTLSDR_API int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm); /*! * Get actual frequency correction value of the device. * * \param dev the device handle given by rtlsdr_open() * \return correction value in parts per million (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, RTLSDR_TUNER_R820T, RTLSDR_TUNER_R828D }; /*! * Get the tuner type. * * \param dev the device handle given by rtlsdr_open() * \return RTLSDR_TUNER_UNKNOWN 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. * * Valid gain values (in tenths of a dB) for the E4000 tuner: * -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 */ RTLSDR_API int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain); /*! * Set the bandwidth for the device. * * \param dev the device handle given by rtlsdr_open() * \param bw bandwidth in Hz. Zero means automatic BW selection. * \return 0 on success */ RTLSDR_API int rtlsdr_set_tuner_bandwidth(rtlsdr_dev_t *dev, uint32_t bw); /*! * Get actual gain the device is configured to. * * \param dev the device handle given by rtlsdr_open() * \return 0 on error, gain in tenths of a dB, 115 means 11.5 dB. */ RTLSDR_API int rtlsdr_get_tuner_gain(rtlsdr_dev_t *dev); /*! * Set the intermediate frequency gain for the device. * * \param dev the device handle given by rtlsdr_open() * \param stage intermediate frequency gain stage number (1 to 6 for E4000) * \param gain in tenths of a dB, -30 means -3.0 dB. * \return 0 on success */ RTLSDR_API int rtlsdr_set_tuner_if_gain(rtlsdr_dev_t *dev, int stage, int gain); /*! * Set the gain mode (automatic/manual) for the device. * Manual gain mode must be enabled for the gain setter function to work. * * \param dev the device handle given by rtlsdr_open() * \param manual gain mode, 1 means manual gain mode shall be enabled. * \return 0 on success */ RTLSDR_API int rtlsdr_set_tuner_gain_mode(rtlsdr_dev_t *dev, int manual); /*! * Set the sample rate for the device, also selects the baseband filters * according to the requested sample rate for tuners where this is possible. * * \param dev the device handle given by rtlsdr_open() * \param samp_rate the sample rate to be set, possible values are: * 225001 - 300000 Hz * 900001 - 3200000 Hz * sample loss is to be expected for rates > 2400000 * \return 0 on success, -EINVAL on invalid rate */ RTLSDR_API int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t rate); /*! * Get actual sample rate the device is configured to. * * \param dev the device handle given by rtlsdr_open() * \return 0 on error, sample rate in Hz otherwise */ RTLSDR_API uint32_t rtlsdr_get_sample_rate(rtlsdr_dev_t *dev); /*! * Enable test mode that returns an 8 bit counter instead of the samples. * The counter is generated inside the RTL2832. * * \param dev the device handle given by rtlsdr_open() * \param test mode, 1 means enabled, 0 disabled * \return 0 on success */ RTLSDR_API int rtlsdr_set_testmode(rtlsdr_dev_t *dev, int on); /*! * Enable or disable the internal digital AGC of the RTL2832. * * \param dev the device handle given by rtlsdr_open() * \param digital AGC mode, 1 means enabled, 0 disabled * \return 0 on success */ RTLSDR_API int rtlsdr_set_agc_mode(rtlsdr_dev_t *dev, int on); /*! * Enable or disable the direct sampling mode. When enabled, the IF mode * of the RTL2832 is activated, and rtlsdr_set_center_freq() will control * the IF-frequency of the DDC, which can be used to tune from 0 to 28.8 MHz * (xtal frequency of the RTL2832). * * \param dev the device handle given by rtlsdr_open() * \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); /*! * Get state of the direct sampling mode * * \param dev the device handle given by rtlsdr_open() * \return -1 on error, 0 means disabled, 1 I-ADC input enabled * 2 Q-ADC input enabled */ RTLSDR_API int rtlsdr_get_direct_sampling(rtlsdr_dev_t *dev); /*! * Enable or disable offset tuning for zero-IF tuners, which allows to avoid * problems caused by the DC offset of the ADCs and 1/f noise. * * \param dev the device handle given by rtlsdr_open() * \param on 0 means disabled, 1 enabled * \return 0 on success */ RTLSDR_API int rtlsdr_set_offset_tuning(rtlsdr_dev_t *dev, int on); /*! * Get state of the offset tuning mode * * \param dev the device handle given by rtlsdr_open() * \return -1 on error, 0 means disabled, 1 enabled */ RTLSDR_API int rtlsdr_get_offset_tuning(rtlsdr_dev_t *dev); /* streaming functions */ RTLSDR_API int rtlsdr_reset_buffer(rtlsdr_dev_t *dev); RTLSDR_API int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read); typedef void(*rtlsdr_read_async_cb_t)(unsigned char *buf, uint32_t len, void *ctx); /*! * Read samples from the device asynchronously. This function will block until * it is being canceled using rtlsdr_cancel_async() * * NOTE: This function is deprecated and is subject for removal. * * \param dev the device handle given by rtlsdr_open() * \param cb callback function to return received samples * \param ctx user specific context to pass via the callback function * \return 0 on success */ RTLSDR_API int rtlsdr_wait_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx); /*! * Read samples from the device asynchronously. This function will block until * it is being canceled using rtlsdr_cancel_async() * * \param dev the device handle given by rtlsdr_open() * \param cb callback function to return received samples * \param ctx user specific context to pass via the callback function * \param buf_num optional buffer count, buf_num * buf_len = overall buffer size * set to 0 for default buffer count (15) * \param buf_len optional buffer length, must be multiple of 512, * should be a multiple of 16384 (URB size), set to 0 * for default buffer length (16 * 32 * 512) * \return 0 on success */ RTLSDR_API int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx, uint32_t buf_num, uint32_t buf_len); /*! * Cancel all pending asynchronous operations on the device. * * \param dev the device handle given by rtlsdr_open() * \return 0 on success */ RTLSDR_API int rtlsdr_cancel_async(rtlsdr_dev_t *dev); /*! * Enable or disable the bias tee on GPIO PIN 0. * * \param dev the device handle given by rtlsdr_open() * \param on 1 for Bias T on. 0 for Bias T off. * \return -1 if device is not initialized. 0 otherwise. */ RTLSDR_API int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on); /*! * Enable or disable the bias tee on the given GPIO pin. * * \param dev the device handle given by rtlsdr_open() * \param gpio the gpio pin to configure as a Bias T control. * \param on 1 for Bias T on. 0 for Bias T off. * \return -1 if device is not initialized. 0 otherwise. */ RTLSDR_API int rtlsdr_set_bias_tee_gpio(rtlsdr_dev_t *dev, int gpio, int on); #ifdef __cplusplus } #endif #endif /* __RTL_SDR_H */