Tansmit data part on adrv9009-iiostream.c based on zcu102_adrv9009(linux OS)

hello

if my question is not clear, i an sorry to bother you and please tell me.

i am in some trouble again.i use the default sd card image(default:BOOT.BIN Image system.dtb).the turn on the zcu102_adrv9009.

firstly,i use the iio-oscilloscope to test if the adrv9009 and zcu102 is working.i can see the boadrd is working because it can receive/transmit data by the gui and spectrum analyzer.

then i go to test the adrv9009-iiostream.c file you provide.

i creat a lte sigal(20MHz).you can see the picture.

i write some code the read data from this file, and send the data to transmit.here is my code.

/*
 * libiio - ADRV9009 IIO streaming example
 *
 * Copyright (C) 2014 IABG mbH
 * Author: Michael Feilen <feilen_at_iabg.de>
 * Copyright (C) 2019 Analog Devices Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 **/

#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <signal.h>
#include <stdio.h>

#ifdef __APPLE__
#include <iio/iio.h>
#else
#include <iio.h>
#endif

/* helper macros */
#define MHZ(x) ((long long)(x*1000000.0 + .5))
#define GHZ(x) ((long long)(x*1000000000.0 + .5))

#define ASSERT(expr) { \
	if (!(expr)) { \
		(void) fprintf(stderr, "assertion failed (%s:%d)\n", __FILE__, __LINE__); \
		(void) abort(); \
	} \
}

/* RX is input, TX is output */
enum iodev { RX, TX };

/* common RX and TX streaming params */
struct stream_cfg {
	long long lo_hz; // Local oscillator frequency in Hz
};

/* static scratch mem for strings */
static char tmpstr[64];

/* IIO structs required for streaming */
static struct iio_context *ctx   = NULL;
static struct iio_channel *rx0_i = NULL;
static struct iio_channel *rx0_q = NULL;
static struct iio_channel *tx0_i = NULL;
static struct iio_channel *tx0_q = NULL;
static struct iio_buffer  *rxbuf = NULL;
static struct iio_buffer  *txbuf = NULL;

static bool stop;

/* cleanup and exit */
static void shutdown()
{
	printf("* Destroying buffers\n");
	if (rxbuf) { iio_buffer_destroy(rxbuf); }
	if (txbuf) { iio_buffer_destroy(txbuf); }

	printf("* Disabling streaming channels\n");
	if (rx0_i) { iio_channel_disable(rx0_i); }
	if (rx0_q) { iio_channel_disable(rx0_q); }
	if (tx0_i) { iio_channel_disable(tx0_i); }
	if (tx0_q) { iio_channel_disable(tx0_q); }

	printf("* Destroying context\n");
	if (ctx) { iio_context_destroy(ctx); }
	exit(0);
}

static void handle_sig(int sig)
{
	printf("Waiting for process to finish...\n");
	stop = true;
}

/* check return value of attr_write function */
static void errchk(int v, const char* what) {
	 if (v < 0) { fprintf(stderr, "Error %d writing to channel \"%s\"\nvalue may not be supported.\n", v, what); shutdown(); }
}

/* write attribute: long long int */
static void wr_ch_lli(struct iio_channel *chn, const char* what, long long val)
{
	errchk(iio_channel_attr_write_longlong(chn, what, val), what);
}

/* write attribute: long long int */
static long long rd_ch_lli(struct iio_channel *chn, const char* what)
{
	long long val;

	errchk(iio_channel_attr_read_longlong(chn, what, &val), what);

	printf("\t %s: %lld\n", what, val);
	return val;
}

#if 0
/* write attribute: string */
static void wr_ch_str(struct iio_channel *chn, const char* what, const char* str)
{
	errchk(iio_channel_attr_write(chn, what, str), what);
}
#endif

/* helper function generating channel names */
static char* get_ch_name_mod(const char* type, int id, char modify)
{
	snprintf(tmpstr, sizeof(tmpstr), "%s%d_%c", type, id, modify);
	return tmpstr;
}

/* helper function generating channel names */
static char* get_ch_name(const char* type, int id)
{
	snprintf(tmpstr, sizeof(tmpstr), "%s%d", type, id);
	return tmpstr;
}

/* returns adrv9009 phy device */
static struct iio_device* get_adrv9009_phy(struct iio_context *ctx)
{
	struct iio_device *dev =  iio_context_find_device(ctx, "adrv9009-phy");
	ASSERT(dev && "No adrv9009-phy found");
	return dev;
}

/* finds adrv9009 streaming IIO devices */
static bool get_adrv9009_stream_dev(struct iio_context *ctx, enum iodev d, struct iio_device **dev)
{
	switch (d) {
	case TX: *dev = iio_context_find_device(ctx, "axi-adrv9009-tx-hpc"); return *dev != NULL;
	case RX: *dev = iio_context_find_device(ctx, "axi-adrv9009-rx-hpc");  return *dev != NULL;
	default: ASSERT(0); return false;
	}
}

/* finds adrv9009 streaming IIO channels */
static bool get_adrv9009_stream_ch(struct iio_context *ctx, enum iodev d, struct iio_device *dev, int chid, char modify, struct iio_channel **chn)
{
	*chn = iio_device_find_channel(dev, modify ? get_ch_name_mod("voltage", chid, modify) : get_ch_name("voltage", chid), d == TX);
	if (!*chn)
		*chn = iio_device_find_channel(dev, modify ? get_ch_name_mod("voltage", chid, modify) : get_ch_name("voltage", chid), d == TX);
	return *chn != NULL;
}

/* finds adrv9009 phy IIO configuration channel with id chid */
static bool get_phy_chan(struct iio_context *ctx, enum iodev d, int chid, struct iio_channel **chn)
{
	switch (d) {
	case RX: *chn = iio_device_find_channel(get_adrv9009_phy(ctx), get_ch_name("voltage", chid), false); return *chn != NULL;
	case TX: *chn = iio_device_find_channel(get_adrv9009_phy(ctx), get_ch_name("voltage", chid), true);  return *chn != NULL;
	default: ASSERT(0); return false;
	}
}

/* finds adrv9009 local oscillator IIO configuration channels */
static bool get_lo_chan(struct iio_context *ctx, struct iio_channel **chn)
{
	 // LO chan is always output, i.e. true
	*chn = iio_device_find_channel(get_adrv9009_phy(ctx), get_ch_name("altvoltage", 0), true); return *chn != NULL;
}

/* applies streaming configuration through IIO */
bool cfg_adrv9009_streaming_ch(struct iio_context *ctx, struct stream_cfg *cfg, int chid)
{
	struct iio_channel *chn = NULL;

	// Configure phy and lo channels
	printf("* Acquiring ADRV9009 phy channel %d\n", chid);
	if (!get_phy_chan(ctx, true, chid, &chn)) {	return false; }

	rd_ch_lli(chn, "rf_bandwidth");
	rd_ch_lli(chn, "sampling_frequency");

	// Configure LO channel
	printf("* Acquiring ADRV9009 TRX lo channel\n");
	if (!get_lo_chan(ctx, &chn)) { return false; }
	wr_ch_lli(chn, "frequency", cfg->lo_hz);
	return true;
}

/* simple configuration and streaming */
int main (int argc, char **argv)
{
	// Streaming devices
	struct iio_device *tx;
	struct iio_device *rx;

	// RX and TX sample counters
	size_t nrx = 0;
	size_t ntx = 0;

	// Stream configuration
	struct stream_cfg trxcfg;
	FILE * fp;
	int16_t i1, i2;
	if ((fp = fopen("./LTE_20_1_92.16.txt", "r")) == NULL)
	{
		fprintf(stderr, "Can't open the file.");
		exit(EXIT_FAILURE);
	}
	// Listen to ctrl+c and ASSERT
	signal(SIGINT, handle_sig);

	// TRX stream config
	trxcfg.lo_hz = GHZ(2.5);

	printf("* Acquiring IIO context\n");
	ASSERT((ctx = iio_create_default_context()) && "No context");
	ASSERT(iio_context_get_devices_count(ctx) > 0 && "No devices");

	printf("* Acquiring ADRV9009 streaming devices\n");
	ASSERT(get_adrv9009_stream_dev(ctx, TX, &tx) && "No tx dev found");
	ASSERT(get_adrv9009_stream_dev(ctx, RX, &rx) && "No rx dev found");

	printf("* Configuring ADRV9009 for streaming\n");
	ASSERT(cfg_adrv9009_streaming_ch(ctx, &trxcfg, 0) && "TRX device not found");

	printf("* Initializing ADRV9009 IIO streaming channels\n");
	ASSERT(get_adrv9009_stream_ch(ctx, RX, rx, 0, 'i', &rx0_i) && "RX chan i not found");
	ASSERT(get_adrv9009_stream_ch(ctx, RX, rx, 0, 'q', &rx0_q) && "RX chan q not found");
	ASSERT(get_adrv9009_stream_ch(ctx, TX, tx, 0, 0, &tx0_i) && "TX chan i not found");
	ASSERT(get_adrv9009_stream_ch(ctx, TX, tx, 1, 0, &tx0_q) && "TX chan q not found");

	printf("* Enabling IIO streaming channels\n");
	iio_channel_enable(rx0_i);
	iio_channel_enable(rx0_q);
	iio_channel_enable(tx0_i);
	iio_channel_enable(tx0_q);

	printf("* Creating non-cyclic IIO buffers with 1 MiS\n");
	rxbuf = iio_device_create_buffer(rx, 1024*1024, false);
	if (!rxbuf) {
		perror("Could not create RX buffer");
		shutdown();
	}
	txbuf = iio_device_create_buffer(tx, 1024*1024, false);
	if (!txbuf) {
		perror("Could not create TX buffer");
		shutdown();
	}

	printf("* Starting IO streaming (press CTRL+C to cancel)\n");
	while (!stop)
	{
		ssize_t nbytes_rx, nbytes_tx;
		char *p_dat, *p_end;
		ptrdiff_t p_inc;

		// Schedule TX buffer
		nbytes_tx = iio_buffer_push(txbuf);
		if (nbytes_tx < 0) { printf("Error pushing buf %d\n", (int) nbytes_tx); shutdown(); }

		// Refill RX buffer
		nbytes_rx = iio_buffer_refill(rxbuf);
		if (nbytes_rx < 0) { printf("Error refilling buf %d\n",(int) nbytes_rx); shutdown(); }

		// READ: Get pointers to RX buf and read IQ from RX buf port 0
		p_inc = iio_buffer_step(rxbuf);
		p_end = iio_buffer_end(rxbuf);
		for (p_dat = iio_buffer_first(rxbuf, rx0_i); p_dat < p_end; p_dat += p_inc) {
			// Example: swap I and Q
			const int16_t i = ((int16_t*)p_dat)[0]; // Real (I)
			const int16_t q = ((int16_t*)p_dat)[1]; // Imag (Q)
			((int16_t*)p_dat)[0] = q;
			((int16_t*)p_dat)[1] = i;
		}

		// WRITE: Get pointers to TX buf and write IQ to TX buf port 0
		p_inc = iio_buffer_step(txbuf);
		p_end = iio_buffer_end(txbuf);
		for (p_dat = iio_buffer_first(txbuf, tx0_i); p_dat < p_end; p_dat += p_inc) {
			// Example: fill with zeros
			// 14-bit sample needs to be MSB alligned so shift by 2
			// https://wiki.analog.com/resources/eval/user-guides/ad-fmcomms2-ebz/software/basic_iq_datafiles#binary_format
			if (fscanf(fp, "%hd %hd", &i1, &i2) == EOF)
			{
				rewind(fp);
				fscanf(fp, "%hd %hd", &i1, &i2);
			}
			((int16_t*)p_dat)[0] = i1 << 2; // Real (I)
			((int16_t*)p_dat)[1] = i2 << 2; // Imag (Q)
		}

		// Sample counter increment and status output
		nrx += nbytes_rx / iio_device_get_sample_size(rx);
		ntx += nbytes_tx / iio_device_get_sample_size(tx);
		printf("\tRX %8.2f MSmp, TX %8.2f MSmp\n", nrx/1e6, ntx/1e6);
	}
	fclose(fp);
	shutdown();

	return 0;
}

you can see this picture too.

then i run this code.

you can see there is some error.

adrv9009 spi1.1: ERROR: 43: TALISE_gpIntHandler(): PA Protection Channel1 Reports Error

furthermore,in the spectrum analyzer there is something. 

TX1:no siganl

TX2:2.04GHz

i think that my signal is not sent successfully。

could you tell how to send siganl rightly.

do i need to do some configuration ?then i could send data by using this adrv9009-iiostream.c?

or something else?

if my question is not clear, i an sorry to bother you and please tell me.

here is similar question .

yes,i rebuild the hdl and generate the boot.bin,it works.but this example adrv9009-iiostream.c can not transmit data.in my spectrum analyzer is always a single  tone signal(40MHz) modulated by LO.

when the LO is 2GHz,TX is 2.04GHz.

when the LO is 2.5GHz,TX is 2.54GHz.

next picture is send code.we can the i/q is set 0,but the TX is still 2.04GHz.

another problem is that we have tried to read data from my own file(generate by matlab),.the details you can see next peicture.of course the data file format is same as yours.

the function of the code is read the data from the file ,and send it to the TX buffer.

but it seems that my TX code is not working.on my spectrum analyzer is still 2.04GHz.

if my question is not clear, i an sorry to bother you and please tell me.

thank you very much.