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doxygen support for USRP PHY Interface

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This commit is contained in:
Rohit Gupta
2015-12-31 09:06:10 +01:00
parent 51942ab13c
commit 8e1b5d26d4
4 changed files with 114 additions and 15 deletions
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targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+98 -9
View File
@@ -29,7 +29,7 @@
/** usrp_lib.cpp
*
* Author: HongliangXU : hong-liang-xu@agilent.com
* \author: HongliangXU : hong-liang-xu@agilent.com
*/
#include <string.h>
@@ -54,47 +54,71 @@
# include <immintrin.h>
#endif
/** @addtogroup _USRP_PHY_RF_INTERFACE_
* @{
*/
/*! \brief USRP Configuration */
typedef struct
{
// --------------------------------
// variables for USRP configuration
// --------------------------------
//! USRP device pointer
uhd::usrp::multi_usrp::sptr usrp;
//uhd::usrp::multi_usrp::sptr rx_usrp;
//create a send streamer and a receive streamer
//! USRP TX Stream
uhd::tx_streamer::sptr tx_stream;
//! USRP RX Stream
uhd::rx_streamer::sptr rx_stream;
//! USRP TX Metadata
uhd::tx_metadata_t tx_md;
//! USRP RX Metadata
uhd::rx_metadata_t rx_md;
//! USRP Timestamp Information
uhd::time_spec_t tm_spec;
//setup variables and allocate buffer
//! USRP Metadata
uhd::async_metadata_t async_md;
//! Sampling rate
double sample_rate;
// time offset between transmiter timestamp and receiver timestamp;
//! time offset between transmiter timestamp and receiver timestamp;
double tdiff;
// use usrp_time_offset to get this value
//! TX forward samples. We use usrp_time_offset to get this value
int tx_forward_nsamps; //166 for 20Mhz
// --------------------------------
// Debug and output control
// --------------------------------
//! Number of underflows
int num_underflows;
//! Number of overflows
int num_overflows;
//! Number of sequential errors
int num_seq_errors;
//! tx count
int64_t tx_count;
//! rx count
int64_t rx_count;
//! timestamp of RX packet
openair0_timestamp rx_timestamp;
} usrp_state_t;
/*! \brief Called to start the USRP transceiver. Return 0 if OK, < 0 if error
@param device pointer to the device structure specific to the RF hardware target
*/
static int trx_usrp_start(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -117,7 +141,9 @@ static int trx_usrp_start(openair0_device *device)
return 0;
}
/*! \brief Terminate operation of the USRP transceiver -- free all associated resources
* \param device the hardware to use
*/
static void trx_usrp_end(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -131,6 +157,14 @@ static void trx_usrp_end(openair0_device *device)
}
/*! \brief Called to send samples to the USRP RF target
@param device pointer to the device structure specific to the RF hardware target
@param timestamp The timestamp at whicch the first sample MUST be sent
@param buff Buffer which holds the samples
@param nsamps number of samples to be sent
@param antenna_id index of the antenna if the device has multiple anteannas
@param flags flags must be set to TRUE if timestamp parameter needs to be applied
*/
static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -152,6 +186,17 @@ static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp,
return 0;
}
/*! \brief Receive samples from hardware.
* Read \ref nsamps samples from each channel to buffers. buff[0] is the array for
* the first channel. *ptimestamp is the time at which the first sample
* was received.
* \param device the hardware to use
* \param[out] ptimestamp the time at which the first sample was received.
* \param[out] buff An array of pointers to buffers for received samples. The buffers must be large enough to hold the number of samples \ref nsamps.
* \param nsamps Number of samples. One sample is 2 byte I + 2 byte Q => 4 byte.
* \param antenna_id Index of antenna for which to receive samples
* \returns the number of sample read
*/
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -237,6 +282,9 @@ static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp
return samples_received;
}
/*! \brief Get current timestamp of USRP
* \param device the hardware to use
*/
openair0_timestamp get_usrp_time(openair0_device *device)
{
@@ -245,11 +293,21 @@ openair0_timestamp get_usrp_time(openair0_device *device)
return s->usrp->get_time_now().to_ticks(s->sample_rate);
}
/*! \brief Compares two variables within precision
* \param a first variable
* \param b second variable
*/
static bool is_equal(double a, double b)
{
return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
/*! \brief Set frequencies (TX/RX)
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \param dummy dummy variable not used
* \returns 0 in success
*/
int trx_usrp_set_freq(openair0_device* device, openair0_config_t *openair0_cfg, int dummy) {
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -261,6 +319,11 @@ int trx_usrp_set_freq(openair0_device* device, openair0_config_t *openair0_cfg,
}
/*! \brief Set RX frequencies
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
*/
int openair0_set_rx_frequencies(openair0_device* device, openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t*)device->priv;
@@ -278,6 +341,11 @@ int openair0_set_rx_frequencies(openair0_device* device, openair0_config_t *open
}
/*! \brief Set Gains (TX/RX)
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
*/
int trx_usrp_set_gains(openair0_device* device,
openair0_config_t *openair0_cfg) {
@@ -298,11 +366,14 @@ int trx_usrp_set_gains(openair0_device* device,
return(0);
}
/*! \brief Stop USRP
* \param card refers to the hardware index to use
*/
int trx_usrp_stop(int card) {
return(0);
}
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_b210[] = {
{3500000000.0,46.0},
{2660000000.0,53.0},
@@ -311,6 +382,7 @@ rx_gain_calib_table_t calib_table_b210[] = {
{816000000.0,62.0},
{-1,0}};
/*! \brief USRPx310 RX calibration table */
rx_gain_calib_table_t calib_table_x310[] = {
{3500000000.0,77.0},
{2660000000.0,80.0},
@@ -319,6 +391,11 @@ rx_gain_calib_table_t calib_table_x310[] = {
{816000000.0,85.0},
{-1,0}};
/*! \brief Set RX gain offset
* \param openair0_cfg RF frontend parameters set by application
* \param chain_index RF chain to apply settings to
* \returns 0 in success
*/
void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index) {
int i=0;
@@ -340,19 +417,30 @@ void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index) {
}
/*! \brief print the USRP statistics
* \param device the hardware to use
* \returns 0 on success
*/
int trx_usrp_get_stats(openair0_device* device) {
return(0);
}
/*! \brief Reset the USRP statistics
* \param device the hardware to use
* \returns 0 on success
*/
int trx_usrp_reset_stats(openair0_device* device) {
return(0);
}
/*! \brief Initialize Openair USRP target. It returns 0 if OK
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
*/
int openair0_dev_init_usrp(openair0_device* device, openair0_config_t *openair0_cfg)
{
uhd::set_thread_priority_safe(1.0);
@@ -584,3 +672,4 @@ int openair0_dev_init_usrp(openair0_device* device, openair0_config_t *openair0_
s->tx_forward_nsamps = 50;
return 0;
}
/*@}*/