124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/*
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* Copyright 2012 Jared Boone
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* Copyright 2013 Benjamin Vernoux
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*
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* This file is part of HackRF.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "tuning.h"
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#include <rffc5071.h>
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#include <max2837.h>
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#include "rf_path.h"
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#define FREQ_ONE_MHZ (1000*1000)
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#define MIN_LP_FREQ_MHZ (5)
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#define MAX_LP_FREQ_MHZ (2300)
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#define MIN_BYPASS_FREQ_MHZ (2300)
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#define MAX_BYPASS_FREQ_MHZ (2700)
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#define MIN_HP_FREQ_MHZ (2700)
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#define MAX_HP_FREQ_MHZ (6800)
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static uint32_t max2837_freq_nominal_hz=2600000000;
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#define MAX2837_FREQ_NOMINAL_MHZ (max2837_freq_nominal_hz / FREQ_ONE_MHZ)
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uint32_t freq_mhz_cache=100, freq_hz_cache=0;
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/*
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* Set freq/tuning between 5MHz to 6800 MHz (less than 16bits really used)
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* hz between 0 to 999999 Hz (not checked)
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* return false on error or true if success.
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*/
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bool set_freq(uint32_t freq_mhz, uint32_t freq_hz)
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{
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bool success;
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uint32_t RFFC5071_freq_mhz;
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uint32_t MAX2837_freq_hz;
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uint32_t real_RFFC5071_freq_hz;
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uint32_t tmp_hz;
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success = true;
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const max2837_mode_t prior_max2837_mode = max2837_mode();
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max2837_mode_standby();
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if(freq_mhz >= MIN_LP_FREQ_MHZ)
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{
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if(freq_mhz < MAX_LP_FREQ_MHZ)
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{
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rf_path_set_filter(RF_PATH_FILTER_LOW_PASS);
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RFFC5071_freq_mhz = MAX2837_FREQ_NOMINAL_MHZ - freq_mhz;
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/* Set Freq and read real freq */
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real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz);
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if(real_RFFC5071_freq_hz < RFFC5071_freq_mhz * FREQ_ONE_MHZ)
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{
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tmp_hz = -(RFFC5071_freq_mhz * FREQ_ONE_MHZ - real_RFFC5071_freq_hz);
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}else
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{
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tmp_hz = (real_RFFC5071_freq_hz - RFFC5071_freq_mhz * FREQ_ONE_MHZ);
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}
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MAX2837_freq_hz = max2837_freq_nominal_hz + tmp_hz + freq_hz;
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max2837_set_frequency(MAX2837_freq_hz);
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}else if( (freq_mhz >= MIN_BYPASS_FREQ_MHZ) && (freq_mhz < MAX_BYPASS_FREQ_MHZ) )
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{
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rf_path_set_filter(RF_PATH_FILTER_BYPASS);
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MAX2837_freq_hz = (freq_mhz * FREQ_ONE_MHZ) + freq_hz;
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/* RFFC5071_freq_mhz <= not used in Bypass mode */
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max2837_set_frequency(MAX2837_freq_hz);
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}else if( (freq_mhz >= MIN_HP_FREQ_MHZ) && (freq_mhz < MAX_HP_FREQ_MHZ) )
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{
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rf_path_set_filter(RF_PATH_FILTER_HIGH_PASS);
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RFFC5071_freq_mhz = freq_mhz - MAX2837_FREQ_NOMINAL_MHZ;
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/* Set Freq and read real freq */
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real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz);
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if(real_RFFC5071_freq_hz < RFFC5071_freq_mhz * FREQ_ONE_MHZ)
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{
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tmp_hz = (RFFC5071_freq_mhz * FREQ_ONE_MHZ - real_RFFC5071_freq_hz);
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}else
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{
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tmp_hz = -(real_RFFC5071_freq_hz - RFFC5071_freq_mhz * FREQ_ONE_MHZ);
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}
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MAX2837_freq_hz = max2837_freq_nominal_hz + tmp_hz + freq_hz;
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max2837_set_frequency(MAX2837_freq_hz);
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}else
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{
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/* Error freq_mhz too high */
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success = false;
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}
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}else
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{
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/* Error freq_mhz too low */
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success = false;
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}
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max2837_set_mode(prior_max2837_mode);
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freq_mhz_cache = freq_mhz;
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freq_hz_cache = freq_hz;
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return success;
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}
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bool set_freq_if(const uint32_t freq_if_hz) {
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bool success = false;
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if( (freq_if_hz >= MIN_BYPASS_FREQ_MHZ) && (freq_if_hz <= MAX_BYPASS_FREQ_MHZ) ) {
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max2837_freq_nominal_hz = freq_if_hz;
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success = set_freq(freq_mhz_cache, freq_hz_cache);
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}
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return success;
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}
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