5363ec3672
Had to do it all at once due to name conflicts with API exposed in libopencm3. Quite invasive patch! Also precipitated an LED API...
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
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* Copyright 2012 Michael Ossmann
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* Copyright (C) 2012 Jared Boone
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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 <libopencm3/lpc43xx/sgpio.h>
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#include <hackrf_core.h>
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#include <tuning.h>
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void tx_test() {
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sgpio_set_slice_mode(&sgpio_config, false);
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sgpio_configure(&sgpio_config, TRANSCEIVER_MODE_TX);
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// LSB goes out first, samples are 0x<Q1><I1><Q0><I0>
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volatile uint32_t buffer[] = {
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0xda808080,
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0xda80ff80,
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0x26808080,
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0x26800180,
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};
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uint32_t i = 0;
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sgpio_cpld_stream_enable(&sgpio_config);
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while(true) {
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while(SGPIO_STATUS_1 == 0);
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SGPIO_REG_SS(SGPIO_SLICE_A) = buffer[(i++) & 3];
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SGPIO_CLR_STATUS_1 = 1;
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}
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}
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void rx_test() {
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sgpio_set_slice_mode(&sgpio_config, false);
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sgpio_configure(&sgpio_config, TRANSCEIVER_MODE_RX);
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volatile uint32_t buffer[4096];
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uint32_t i = 0;
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int16_t magsq;
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int8_t sigi, sigq;
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sgpio_cpld_stream_enable(&sgpio_config);
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led_on(LED2);
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while(true) {
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while(SGPIO_STATUS_1 == 0);
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led_on(LED1);
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SGPIO_CLR_STATUS_1 = 1;
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buffer[i & 4095] = SGPIO_REG_SS(SGPIO_SLICE_A);
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/* find the magnitude squared */
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sigi = (buffer[i & 4095] & 0xff) - 0x80;
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sigq = ((buffer[i & 4095] >> 8) & 0xff) - 0x80;
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magsq = sigi * sigq;
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if ((uint16_t)magsq & 0x8000) {
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magsq ^= 0xffff;
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magsq++;
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}
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/* illuminate LED3 only when magsq exceeds threshold */
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if (magsq > 0x3c00)
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led_on(LED3);
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else
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led_off(LED3);
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i++;
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}
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}
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int main(void) {
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const uint64_t freq = 2700000000U;
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pin_setup();
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enable_1v8_power();
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#ifdef HACKRF_ONE
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enable_rf_power();
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#endif
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cpu_clock_init();
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rf_path_init(&rf_path);
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rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_RX);
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set_freq(freq);
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rx_test();
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led_on(LED2);
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while (1) {
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}
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return 0;
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}
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