FreeCalypso > hg > fc-rfcal-tools
view autocal/txlevels.c @ 90:713749548df6
fc-rfcal-tri900 script and fc-rfcal-tee helper implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 17 Jul 2017 05:51:31 +0000 |
parents | a2d4cab0a592 |
children | b0618796d28d |
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/* * 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, pslope) double target_dbm; vout_t *pslope; { 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; if (pslope) *pslope = tx_basis[n].slope; apc_delta = (target_vout - tx_basis[n].vout) / tx_basis[n].slope; return tx_basis[n].apc + apc_delta; } calibrate_tx_levels() { unsigned plnum, plidx, apc; double target, meas; printf("Calibrating Tx power levels\n"); printf("Starting RF Tx on the DUT\n"); do_rfe(RX_TX_TCH); for (plnum = txcal_band->start_plnum; plnum <= txcal_band->end_plnum; plnum++) { do_txpw(TX_PWR_LEVEL, plnum); plidx = plnum - txcal_band->start_plnum; target = tx_levels[plidx].target; apc = find_apc_for_target(target, &tx_levels[plidx].slope); tx_levels[plidx].apc = apc; do_txpw(TX_APC_DAC, apc); usleep(20000); meas = tx_power_meas(); printf( "Tx power level #%u: target %.1f dBm, APC=%u, meas %.2f dBm (%+.2f)\n", plnum, target, apc, meas, meas - target); } printf("Stopping RF Tx on the DUT\n"); do_rfe(STOP_ALL); return(0); }