71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/** usrp_lib.h
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*
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* Author: HongliangXU : hong-liang-xu@agilent.com
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*/
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#ifndef USRP_LIB_H
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#define USRP_LIB_H
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typedef int64_t openair0_timestamp;
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typedef struct openair0_device_t openair0_device;
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/* structrue holds the parameters to configure USRP devices
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*/
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typedef struct {
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/* the sample rate for both transmit and receive. */
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double sample_rate;
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/* number of RX channels (=RX antennas) */
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int rx_num_channels;
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/* number of TX channels (=TX antennas) */
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int tx_num_channels;
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/* center frequency in Hz for RX */
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double rx_freq;
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/* center frequency in Hz for TX */
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double tx_freq;
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/* gain for RX in dB */
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double rx_gain;
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/* gain for TX in dB */
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double tx_gain;
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/* RX bandwidth in Hz */
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double rx_bw;
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/* TX bandwidth in Hz */
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double tx_bw;
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} openair0_config_t;
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struct openair0_device_t {
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/* USRP RF frontend parameters set by application */
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openair0_config_t openair0_cfg;
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/* Can be used by driver to hold internal structure*/
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void *priv;
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/* Functions API, which are called by the application*/
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/* Called to start the transceiver. Return 0 if OK, < 0 if error */
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int (*trx_start_func)(openair0_device *device);
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/* Write 'nsamps' samples on each channel from buffers. buff[0] is the array for
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* the first channel. timestamp if the time (in samples) at which the first sample
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* MUST be sent
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* use flags = 1 to send as timestamp specfied*/
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void (*trx_write_func)(openair0_device *device, openair0_timestamp timestamp, const void *buff, int nsamps, int flags);
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/* Read 'nsamps' samples from each channel to buffers. buff[0] is the array for
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* the first channel. *ptimestamp is the time at which the first sample
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* was received.
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* Return the number of sample read */
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int (*trx_read_func)(openair0_device *device, openair0_timestamp *ptimestamp, void *buff, int nsamps);
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/* Terminate operation of the transceiver -- free all associated resources */
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void (*trx_end_func)(openair0_device *device);
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};
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#ifdef __cplusplus
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extern "C"
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{
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/* return 0 if OK, < 0 if error */
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int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg);
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}
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#endif
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#endif // USRP_LIB_H
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