136 lines
4.5 KiB
C
136 lines
4.5 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 "rf_path.h"
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#include <rffc5071.h>
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#ifdef JAWBREAKER
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/*
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* RF switches on Jawbreaker are controlled by General Purpose Outputs (GPO) on
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* the RFFC5072.
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*/
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#define SWITCHCTRL_NO_TX_AMP_PWR (1 << 0) /* GPO1 turn off TX amp power */
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#define SWITCHCTRL_AMP_BYPASS (1 << 1) /* GPO2 bypass amp section */
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#define SWITCHCTRL_TX (1 << 2) /* GPO3 1 for TX mode, 0 for RX mode */
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#define SWITCHCTRL_MIX_BYPASS (1 << 3) /* GPO4 bypass RFFC5072 mixer section */
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#define SWITCHCTRL_HP (1 << 4) /* GPO5 1 for high-pass, 0 for low-pass */
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#define SWITCHCTRL_NO_RX_AMP_PWR (1 << 5) /* GPO6 turn off RX amp power */
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/*
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GPO6 GPO5 GPO4 GPO3 GPO2 GPO1
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!RXAMP HP MIXBP TX AMPBP !TXAMP Mix mode Amp mode
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1 X 1 1 1 1 TX bypass Bypass
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1 X 1 1 0 0 TX bypass TX amplified
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1 1 0 1 1 1 TX high Bypass
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1 1 0 1 0 0 TX high TX amplified
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1 0 0 1 1 1 TX low Bypass
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1 0 0 1 0 0 TX low TX amplified
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1 X 1 0 1 1 RX bypass Bypass
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0 X 1 0 0 1 RX bypass RX amplified
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1 1 0 0 1 1 RX high Bypass
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0 1 0 0 0 1 RX high RX amplified
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1 0 0 0 1 1 RX low Bypass
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0 0 0 0 0 1 RX low RX amplified
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*/
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/*
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* Safe (initial) switch settings turn off both amplifiers and enable both amp
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* bypass and mixer bypass.
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*/
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#define SWITCHCTRL_SAFE (SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_TX | SWITCHCTRL_MIX_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_NO_RX_AMP_PWR)
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#endif
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uint8_t switchctrl = SWITCHCTRL_SAFE;
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void rf_path_init(void) {
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rffc5071_set_gpo(switchctrl);
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}
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void rf_path_set_direction(const rf_path_direction_t direction) {
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/* Turn off TX and RX amplifiers, then enable based on direction and bypass state. */
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switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_NO_RX_AMP_PWR;
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switch(direction) {
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case RF_PATH_DIRECTION_TX:
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switchctrl |= SWITCHCTRL_TX;
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if( (switchctrl & SWITCHCTRL_AMP_BYPASS) == 0 ) {
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/* TX amplifier is in path, be sure to enable TX amplifier. */
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switchctrl &= ~SWITCHCTRL_NO_TX_AMP_PWR;
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}
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rffc5071_tx();
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break;
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case RF_PATH_DIRECTION_RX:
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switchctrl &= ~SWITCHCTRL_TX;
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if( (switchctrl & SWITCHCTRL_AMP_BYPASS) == 0 ) {
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/* RX amplifier is in path, be sure to enable RX amplifier. */
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switchctrl &= ~SWITCHCTRL_NO_RX_AMP_PWR;
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}
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rffc5071_rx();
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break;
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}
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rffc5071_set_gpo(switchctrl);
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}
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void rf_path_set_filter(const rf_path_filter_t filter) {
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switch(filter) {
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default:
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case RF_PATH_FILTER_BYPASS:
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switchctrl |= SWITCHCTRL_MIX_BYPASS;
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rffc5071_disable();
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break;
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case RF_PATH_FILTER_LOW_PASS:
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switchctrl &= ~(SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
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rffc5071_enable();
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break;
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case RF_PATH_FILTER_HIGH_PASS:
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switchctrl &= ~SWITCHCTRL_MIX_BYPASS;
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switchctrl |= SWITCHCTRL_HP;
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rffc5071_enable();
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break;
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}
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rffc5071_set_gpo(switchctrl);
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}
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void rf_path_set_lna(const uint_fast8_t enable) {
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if( enable ) {
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if( switchctrl & SWITCHCTRL_TX ) {
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/* AMP_BYPASS=0, NO_RX_AMP_PWR=1, NO_TX_AMP_PWR=0 */
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switchctrl |= SWITCHCTRL_NO_RX_AMP_PWR;
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switchctrl &= ~(SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_TX_AMP_PWR);
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} else {
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/* AMP_BYPASS=0, NO_RX_AMP_PWR=0, NO_TX_AMP_PWR=1 */
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switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR;
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switchctrl &= ~(SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_RX_AMP_PWR);
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}
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} else {
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/* AMP_BYPASS=1, NO_RX_AMP_PWR=1, NO_TX_AMP_PWR=1 */
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switchctrl |= SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_NO_RX_AMP_PWR;
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}
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rffc5071_set_gpo(switchctrl);
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}
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