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/**
* This file is part of the bladeRF project:
* http://www.github.com/nuand/bladeRF
*
* Copyright (c) 2015 Nuand LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* This file provides DC calibration routines that utilize libbladeRF */
#ifndef DC_CALIBRATION_H_
#define DC_CALIBRATION_H_
#include <libbladeRF.h>
#ifdef __cplusplus
extern "C" {
#endif
struct dc_calibration_params {
uint64_t frequency;
int16_t corr_i;
int16_t corr_q;
float error_i;
float error_q;
int16_t max_dc_i;
int16_t max_dc_q;
int16_t mid_dc_i;
int16_t mid_dc_q;
int16_t min_dc_i;
int16_t min_dc_q;
};
/**
* Calibrate the specified LMS6002D module.
*
* Generally, one should run all of these calibrations prior to executing the RX
* and TX auto calibration routines.
*
* Streams should not be running when attempting to call this function.
*
* Below are the case-insensitive options for the LMS6002D `module` string:
* - LPF Tuning: "lpf_tuning", "lpftuning", "tuning"
* - TX LPF: "tx_lpf", "txlpf"
* - RX LPF: "rx_lpf", "rxlpf"
* - RX VGA2 "rx_vga2", "rxvga2"
* - All of the above: "all"
*
* @param dev bladeRF device handle
* @param module LMS6002D module to calibrate. Passing NULL is synonymous
* with specifying "ALL".
*
* @return 0 on success or libbladeRF return value on failure.
* BLADERF_ERR_INVAL is returned if `module` is invalid.
*/
int dc_calibration_lms6(struct bladerf *dev, const char *module);
/**
* Perform DC offset calbration of the RX path. Neither RX or TX should be
* used during this procedure, as the TX frequency may be adjusted to ensure
* good results are obtained.
*
* The RX input should be disconected from any input sources or antennas when
* performing this calibration.
*
* @pre dc_calibration_lms6() should have been called for all modules prior to
* using this function.
*
* @param[in] dev bladeRF device handle
*
* @param[inout] params DC calibration input and output parameters. This
* list should be populated to describe the
* frequencies over which to calibrate. The
* `corr_i` and `corr_q` fields will be filled in
* for each entry.
*
* @param[in] num_params Number of entries in the `params` list.
*
* @param[in] show_status Print status information to stdout
*
* @return 0 on success or libbladeRF return value on failure.
*/
int dc_calibration_rx(struct bladerf *dev,
struct dc_calibration_params *params,
size_t num_params, bool show_status);
/**
* Perform DC offset calbration of the TX path.
*
* This requires use of both RX and TX modules in an internal loopback mode;
* neither should be in use when this function is called. It should not
* be neccessary to disconnect the RX and TX ports, but it is still recommended,
* just to err on the side of caution.
*
* @pre dc_calibration_lms6() should have been called for all modules prior to
* using this function.
*
* @param dev bladeRF device handle
*
* @return 0 on success or libbladeRF return value on failure.
*/
int dc_calibration_tx(struct bladerf *dev,
struct dc_calibration_params *params,
size_t num_params, bool show_status);
/**
* Convenience wrapper around dc_cal_rx() and dc_cal_tx()
*
* @pre dc_calibration_lms6() should have been called for all modules prior to
* using this function.
*
* @param[in] dev Device handle
* @param[in] module BLADERF_MODULE_RX or BLADERF_MODULE_TX
* @param[inout] params DC calibration input and output parameters. This
* list should be populated to describe the
* frequencies over which to calibrate. The
* `corr_i` and `corr_q` fields will be filled in
* for each entry.
*
* @param[in] num_params Number of entries in the `params` list.
* @param[in] show_status Print status information to stdout
*
* @return 0 on success or libbladeRF return value on failure.
*/
int dc_calibration(struct bladerf *dev, bladerf_module module,
struct dc_calibration_params *params,
size_t num_params, bool show_status);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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