QO100Tx_Rx/pluto/pluto_setup.cpp

/*
* Adalm Pluto Driver
* ==================
* Author: DJ0ABR
*
*   (c) DJ0ABR
*   www.dj0abr.de
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 2 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program; if not, write to the Free Software
*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* 
* =========================
* setup pluto for RX and TX
* =========================
* 
*/

#include "../qo100trx.h"

// ============= Configuration ============= 
float RX_BW =    	1;					// MHz
float TX_BW =    	0.1;				// MHz
double RX_FREQ =	(double)RXBASEQRG;	// Hz
double TX_FREQ =	(double)TXBASEQRG;	// Hz
// =========================================


// device context
struct iio_context *ctx   = NULL;

// Streaming devices
struct iio_device *tx;
struct iio_device *rx;

// channels
struct iio_channel *rx0_i = NULL;
struct iio_channel *rx0_q = NULL;
struct iio_channel *tx0_i = NULL;
struct iio_channel *tx0_q = NULL;

// buffers
struct iio_buffer  *rxbuf = NULL;
struct iio_buffer  *txbuf = NULL;

// Stream configurations
stream_cfg rxcfg;
stream_cfg txcfg;

void pluto_setup()
{
	int ret; 

	// set default configuration from pluto.h

	uint32_t srate = (uint32_t)SAMPRATE;
	if(srate < 2100000) srate = 3000000;

	// RX stream config
	rxcfg.bw_hz = MHZ(RX_BW);   	// rx rf bandwidth
	rxcfg.fs_hz = srate;   			// rx sample rate
	rxcfg.lo_hz = RX_FREQ; 			// rx rf frequency
	rxcfg.rfport = "A_BALANCED"; 	// port A (select for rf freq.)

	// TX stream config
	txcfg.bw_hz = MHZ(TX_BW); 		// tx rf bandwidth
	txcfg.fs_hz = srate;   			// tx sample rate (must be same as RX samp rate)
	txcfg.lo_hz = TX_FREQ; 			// tx rf frequency
	txcfg.rfport = "A"; 			// port A (select for rf freq.)
	
	printf("RX frequency         : %f MHz\n", (double)rxcfg.lo_hz / 1e6);
	printf("TX frequency         : %f MHz\n", (double)txcfg.lo_hz / 1e6);
	printf("Samplerate           : %f MHz\n", (double)SAMPRATE / 1e6);
	printf("RX Bandwidth         : %f MHz\n", (double)rxcfg.bw_hz / 1e6);
	printf("TX Bandwidth         : %f MHz\n", (double)txcfg.bw_hz / 1e6);
	printf("TX Gain              : %d dBm\n",txpower);

	// Initialize Pluto
	ctx = iio_create_context_from_uri(pluto_context_name);
	if(!ctx) {printf("Cannot find a pluto at: %s\n", pluto_context_name); exit(0);}

	int devanz = iio_context_get_devices_count(ctx);
    if(devanz <= 0) 
    {
        printf("NO Pluto devices found\n");
		exit(0);
    }

	// noch keine PTT

	ret = get_ad9361_stream_dev(ctx, TX, &tx);
	if(!ret) {printf("TX streaming device not found. Pluto error %d\n",errno); exit(0);}
	ret = get_ad9361_stream_dev(ctx, RX, &rx);
	if(!ret) {printf("RX streaming device not found. Pluto error %d\n",errno); exit(0);}

	cfg_ad9361_streaming_ch(ctx, &rxcfg, RX, 0);
	
	// with the following command the F5OEO Firmware activates the PTT on GPIO
	cfg_ad9361_streaming_ch(ctx, &txcfg, TX, 0);

	get_ad9361_stream_ch(ctx, RX, rx, 0, &rx0_i);
	get_ad9361_stream_ch(ctx, RX, rx, 1, &rx0_q);
	get_ad9361_stream_ch(ctx, TX, tx, 0, &tx0_i);
	get_ad9361_stream_ch(ctx, TX, tx, 1, &tx0_q);

	if(SAMPRATE < 2100000)
	{
		iio_device *dev9 = iio_context_find_device(ctx, "ad9361-phy");
		ad9361_set_bb_rate(dev9,(unsigned long)SAMPRATE);
	}

	iio_channel_enable(rx0_i);
	iio_channel_enable(rx0_q);
	iio_channel_enable(tx0_i);
	iio_channel_enable(tx0_q);

	rxbuf = iio_device_create_buffer(rx, PLUTOBUFSIZE, false);
	if (!rxbuf) {
		perror("Could not create RX buffer");
	}
	txbuf = iio_device_create_buffer(tx, PLUTOBUFSIZE, false);
	if (!txbuf) {
		perror("Could not create TX buffer");
	}

	// Pluto init finished
	// create capture/playback thread
	init_runloop();
}