/*
 * The calibration of Tx power levels is implemented here.
 */

#include <stdio.h>
#include <stdlib.h>
#include <rvinterf/l1tm.h>
#include <rvinterf/exitcodes.h>
#include "txband.h"

extern double tx_power_meas();
extern vout_t dbm_to_vout();

extern struct txcal_band *txcal_band;
extern struct tx_basis_point tx_basis[MAX_BASIS_POINTS];
extern unsigned num_basis_points;
extern struct tx_level tx_levels[MAX_TX_LEVELS];

unsigned
find_apc_for_target(target_dbm)
	double target_dbm;
{
	vout_t target_vout;
	unsigned n;
	int apc_delta;

	target_vout = dbm_to_vout(target_dbm);
	for (n = 0; n < num_basis_points - 1; n++)
		if (target_vout < tx_basis[n+1].vout)
			break;
	apc_delta = (target_vout - tx_basis[n].vout) / tx_basis[n].slope;
	return tx_basis[n].apc + apc_delta;
}