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<div class="title">memfifo.c File Reference</div> </div>
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<p>memfifo example for C.
<a href="#details">More...</a></p>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>memfifo example for C. </p>
<p>This example demonstrates the usage of the C API and the high speed interface of the default firmware.</p>
<p>It performs certain tests (device and data integrity, read-write tests, performance) using the memory FIFO as described on <a href="http://wiki.ztex.de/doku.php?id=en:ztex_boards:ztex_fpga_boards:memfifo:memfifo">memfifo example</a>.</p>
<p>The correct bitstream is detected and found automatically if the binary is executed from the directory tree of the SDK. Otherwise it can be specified with parameter '-s'.</p>
<p>Full list of options can be obtained with '-h' </p><div class="fragment"><div class="line"><span class="comment">/*#</span></div>
<div class="line"><span class="comment"> ZTEX Core API for C with examples</span></div>
<div class="line"><span class="comment"> Copyright (C) 2009-2017 ZTEX GmbH.</span></div>
<div class="line"><span class="comment"> http://www.ztex.de</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> This program is free software; you can redistribute it and/or modify</span></div>
<div class="line"><span class="comment"> it under the terms of the GNU General Public License version 3 as</span></div>
<div class="line"><span class="comment"> published by the Free Software Foundation.</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> This program is distributed in the hope that it will be useful, but</span></div>
<div class="line"><span class="comment"> WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><span class="comment"> General Public License for more details.</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment"> You should have received a copy of the GNU General Public License</span></div>
<div class="line"><span class="comment"> along with this program; if not, see http://www.gnu.org/licenses/.</span></div>
<div class="line"><span class="comment">#*/</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><span class="preprocessor">#include <stdarg.h></span></div>
<div class="line"><span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><span class="preprocessor">#include <string.h></span></div>
<div class="line"><span class="preprocessor">#include <fcntl.h></span></div>
<div class="line"><span class="preprocessor">#include <sys/types.h></span></div>
<div class="line"><span class="preprocessor">#include <sys/time.h></span></div>
<div class="line"><span class="preprocessor">#include <libusb-1.0/libusb.h></span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="ztex_8h.html">ztex.h</a>"</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#define BULK_BUF_SIZE 4*1024*1024</span></div>
<div class="line"><span class="preprocessor">#define RW_SIZE 65000 // must be smaller then FIFO size, 64K on USB-FPGA Module 2.01</span></div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">char</span>* prog_name = NULL; <span class="comment">// name of the program</span></div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> paramerr(<span class="keyword">const</span> <span class="keywordtype">char</span>* format,...)</div>
<div class="line">{</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">"Usage: %s options\n"</span>,prog_name);</div>
<div class="line"> fprintf(stderr, <span class="stringliteral">" -h Display this usage information\n"</span></div>
<div class="line"> <span class="stringliteral">" -fu <vendor ID>:<product ID> Select device by USB IDs, default: 0x221A:0x100, <0:ignore ID\n"</span></div>
<div class="line"> <span class="stringliteral">" -fd <bus>:<device> Select device by bus number and device address\n"</span></div>
<div class="line"> <span class="stringliteral">" -fs <string> Select device by serial number string\n"</span></div>
<div class="line"> <span class="stringliteral">" -fp <string> Select device by product string\n"</span></div>
<div class="line"> <span class="stringliteral">" -s <path> Additional search path for bitstream, default '.."</span>DIRSEP<span class="stringliteral">".."</span>DIRSEP<span class="stringliteral">"examples"</span>DIRSEP<span class="stringliteral">"memfifo'\n"</span></div>
<div class="line"> <span class="stringliteral">" -r Reset device (default: reset configuration only)\n"</span></div>
<div class="line"> <span class="stringliteral">" -i Print device info\n"</span></div>
<div class="line"> <span class="stringliteral">" -p Print matching USB devices\n"</span></div>
<div class="line"> <span class="stringliteral">" -pa Print all USB devices\n"</span></div>
<div class="line"> );</div>
<div class="line"> <span class="keywordflow">if</span> ( format ) {</div>
<div class="line"> va_list args;</div>
<div class="line"> va_start(args,format);</div>
<div class="line"> vfprintf(stderr, format, args);</div>
<div class="line"> va_end(args);</div>
<div class="line"> <span class="keywordflow">return</span> 1;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> id_vendor = 0x221A; <span class="comment">// ZTEX vendor ID</span></div>
<div class="line"> <span class="keywordtype">int</span> id_product = 0x100; <span class="comment">// default product ID for ZTEX firmware</span></div>
<div class="line"> <span class="keywordtype">int</span> status = 0;</div>
<div class="line"> libusb_device **devs = NULL;</div>
<div class="line"> <span class="keywordtype">int</span> print_all=0, print=0, print_info=0, reset_dev=0;</div>
<div class="line"> <span class="keywordtype">int</span> busnum = -1, devnum = -1;</div>
<div class="line"> <span class="keywordtype">char</span> *sn_string = NULL, *product_string = NULL;</div>
<div class="line"> libusb_device_handle *handle = NULL;</div>
<div class="line"> <a class="code" href="structztex__device__info.html">ztex_device_info</a> info;</div>
<div class="line"> <span class="keywordtype">char</span> *bitstream_fn = NULL, *bitstream_path = NULL;</div>
<div class="line"> <span class="keywordtype">char</span> sbuf[8192];</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *mbuf = NULL;</div>
<div class="line"> <span class="keywordtype">int</span> transferred, size;</div>
<div class="line"> <span class="keyword">struct </span>timeval tv1,tv2;</div>
<div class="line"></div>
<div class="line"> <span class="comment">// process parameters</span></div>
<div class="line"> prog_name = argv[0];</div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i<argc; i++) {</div>
<div class="line"> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-h"</span>) ) <span class="keywordflow">return</span> paramerr(NULL);</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-p"</span>) ) print=1;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-pa"</span>) ) print_all=1;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-i"</span>) ) print_info=1;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-r"</span>) ) reset_dev=1;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-fu"</span>) ) {</div>
<div class="line"> i++;</div>
<div class="line"> <span class="keywordflow">if</span> (i>=argc || sscanf(argv[i],<span class="stringliteral">"%i:%i"</span>, &id_vendor, &id_product)!=2 ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: <vendor ID>:<product ID> expected after -fu\n"</span>);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-fd"</span>) ) {</div>
<div class="line"> i++;</div>
<div class="line"> <span class="keywordflow">if</span> (i>=argc || sscanf(argv[i],<span class="stringliteral">"%i:%i"</span>, &busnum, &devnum)!=2 ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: <bus>:<device> expected after -fd\n"</span>);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-fs"</span>) ) {</div>
<div class="line"> i++;</div>
<div class="line"> <span class="keywordflow">if</span> (i>=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: <string> expected after -fs\n"</span>);</div>
<div class="line"> sn_string = argv[i];</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-fp"</span>) ) {</div>
<div class="line"> i++;</div>
<div class="line"> <span class="keywordflow">if</span> (i>=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: <string> expected after -fp\n"</span>);</div>
<div class="line"> product_string = argv[i];</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">"-s"</span>) ) {</div>
<div class="line"> i++;</div>
<div class="line"> <span class="keywordflow">if</span> (i>=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: <path> expected after -s\n"</span>);</div>
<div class="line"> bitstream_path = argv[i];</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">return</span> paramerr(<span class="stringliteral">"Error: Invalid parameter %s\n"</span>, argv[i]);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line"> <span class="comment">// INIT libusb</span></div>
<div class="line"> status = libusb_init(NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to init libusb: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">return</span> 1;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">// find all USB devices</span></div>
<div class="line"> status = libusb_get_device_list(NULL, &devs);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to get device list: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// print bus info or find device</span></div>
<div class="line"> <span class="keywordtype">int</span> dev_idx = <a class="code" href="ztex_8h.html#a8ee4c93eef23fbc8044347a7ce351cf5">ztex_scan_bus</a>(sbuf, <span class="keyword">sizeof</span>(sbuf), devs, print_all ? -1 : print ? 1 : 0, id_vendor, id_product, busnum, devnum, sn_string, product_string);</div>
<div class="line"> printf(sbuf);</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> <span class="keywordflow">if</span> ( print || print_all ) {</div>
<div class="line"> status = 0;</div>
<div class="line"> <span class="keywordflow">goto</span> noerr;</div>
<div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( dev_idx<0 ) {</div>
<div class="line"> <span class="keywordflow">if</span> (dev_idx==-1) fprintf(stderr,<span class="stringliteral">"Error: No device found\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">// open device</span></div>
<div class="line"> status = libusb_open(devs[dev_idx], &handle);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to open device: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> libusb_free_device_list(devs, 1);</div>
<div class="line"> devs=NULL;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// reset configuration or device</span></div>
<div class="line"> <span class="keywordflow">if</span> ( ! reset_dev ) {</div>
<div class="line"> status = libusb_set_configuration(handle,-1);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Warning: Unable to unconfigure device: %s, trying to reset it\n"</span>, libusb_error_name(status));</div>
<div class="line"><span class="preprocessor">#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)</span></div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Due to limitations of Windows neither this nor device reset works. This may cause further errors ...\n"</span>);</div>
<div class="line"><span class="preprocessor">#endif </span></div>
<div class="line"> reset_dev = 1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">if</span> ( reset_dev ) {</div>
<div class="line"> status = libusb_reset_device(handle);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to reset device: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> status = libusb_set_configuration(handle,1);</div>
<div class="line"> <span class="keywordflow">if</span> (status < 0) fprintf(stderr,<span class="stringliteral">"Warning: Unable to set configuration 1: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> fflush(stderr);</div>
<div class="line"></div>
<div class="line"> <span class="comment">// get and print device info</span></div>
<div class="line"> status = <a class="code" href="ztex_8h.html#a28cef9d1e168b782b03579c4a59505d3">ztex_get_device_info</a>(handle, &info);</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to get device info: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">if</span> ( print_info ) {</div>
<div class="line"> <a class="code" href="ztex_8h.html#aa64c1cefed076a0f48cafa1882593c79">ztex_print_device_info</a>( sbuf, <span class="keyword">sizeof</span>(sbuf), &info );</div>
<div class="line"> printf(sbuf);</div>
<div class="line"> status = <a class="code" href="ztex_8h.html#ae679e66864c90211a3d8b4670a64d497">ztex_get_fpga_config</a>(handle);</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to get FPGA configuration state: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> printf(<span class="stringliteral">"FPGA: %s\n"</span>, status==0 ? <span class="stringliteral">"unconfigured"</span> : <span class="stringliteral">"configured"</span>);</div>
<div class="line"> status = 0;</div>
<div class="line"> <span class="keywordflow">goto</span> noerr;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// find bitstream</span></div>
<div class="line"> bitstream_fn = <a class="code" href="ztex_8h.html#a74c89f5aa7e3754d88f1dc95846b5cbe">ztex_find_bitstream</a>( &info, bitstream_path ? bitstream_path : <span class="stringliteral">".."</span>DIRSEP<span class="stringliteral">".."</span>DIRSEP<span class="stringliteral">"examples"</span>DIRSEP<span class="stringliteral">"memfifo"</span> , <span class="stringliteral">"memfifo"</span>);</div>
<div class="line"> <span class="keywordflow">if</span> ( bitstream_fn ) {</div>
<div class="line"> printf(<span class="stringliteral">"Using bitstream '%s'\n"</span>, bitstream_fn);</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span> {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Warning: Bitstream not found\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> nobitstream;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// read and upload bitstream</span></div>
<div class="line"> FILE *fd = fopen(bitstream_fn, <span class="stringliteral">"rb"</span>);</div>
<div class="line"> <span class="keywordflow">if</span> ( fd == NULL ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Warning: Error opening file '%s'\n"</span>, bitstream_fn);</div>
<div class="line"> <span class="keywordflow">goto</span> nobitstream;</div>
<div class="line"> }</div>
<div class="line"> status = <a class="code" href="ztex_8h.html#a1861aa844f2ad3cacf37bbde0f9d6bcb">ztex_upload_bitstream</a>(sbuf,<span class="keyword">sizeof</span>(sbuf),handle,&info,fd,-1);</div>
<div class="line"> fclose(fd);</div>
<div class="line"> fprintf(stderr,sbuf);</div>
<div class="line"></div>
<div class="line">nobitstream:</div>
<div class="line"> fflush(stderr);</div>
<div class="line"> <span class="comment">// check config</span></div>
<div class="line"> status = <a class="code" href="ztex_8h.html#ae679e66864c90211a3d8b4670a64d497">ztex_get_fpga_config</a>(handle);</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: Unable to get FPGA configuration state: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( status == 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error: FPGA not configured\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">// claim interface</span></div>
<div class="line"> status = libusb_claim_interface(handle, 0); </div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error claiming interface 0: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> mbuf = malloc(BULK_BUF_SIZE);</div>
<div class="line"> <span class="keywordflow">if</span> ( !mbuf ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error allocating %d bytes\n"</span>, BULK_BUF_SIZE);</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"><span class="comment">// verify mode and prepare device if necessary</span></div>
<div class="line"> <span class="keywordflow">if</span> ( <a class="code" href="ztex_8h.html#a4f0de67505fd5f34a15dc14cecf9d44f">ztex_default_gpio_ctl</a>(handle,0,0) ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Warning: wrong initial mode, switching to mode 0\n"</span>);</div>
<div class="line"> <a class="code" href="ztex_8h.html#a4f0de67505fd5f34a15dc14cecf9d44f">ztex_default_gpio_ctl</a>(handle,7,0);</div>
<div class="line"> <a class="code" href="ztex_8h.html#a42bfe7c8c78b72c747531c370003edb9">ztex_default_reset</a>(handle,0);</div>
<div class="line"> libusb_bulk_transfer(handle, info.<a class="code" href="structztex__device__info.html#a02781851eb020d49d6a330b3675359b2">default_in_ep</a>, mbuf, BULK_BUF_SIZE, &transferred, 250);</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> status = libusb_bulk_transfer(handle, info.<a class="code" href="structztex__device__info.html#a02781851eb020d49d6a330b3675359b2">default_in_ep</a>, mbuf, BULK_BUF_SIZE, &transferred, 250);</div>
<div class="line"> <span class="keywordflow">if</span> ( (status>=0) && (transferred>0) ) fprintf(stderr,<span class="stringliteral">"Warning: found %d bytes in EZ-USB FIFO\n"</span>, transferred);</div>
<div class="line"> }</div>
<div class="line"> fflush(stderr);</div>
<div class="line"></div>
<div class="line"><span class="comment">// test 1: read-write test (mode 0)</span></div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<RW_SIZE; i+=2) {</div>
<div class="line"> mbuf[i] = (i>>1) & 127;</div>
<div class="line"> mbuf[i+1] = 128 | ((i >> 8 ) & 127);</div>
<div class="line"> }</div>
<div class="line"> TWO_TRIES(status, libusb_bulk_transfer(handle, info.<a class="code" href="structztex__device__info.html#a0c09328b8b81a94f007f171bbcd6ad52">default_out_ep</a>, mbuf, RW_SIZE, &transferred, 2000));</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Bulk write error: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> printf(<span class="stringliteral">"Read-write test, short packet test: wrote %d Bytes\n"</span>, transferred);</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> </div>
<div class="line"> TWO_TRIES(status, libusb_bulk_transfer(handle, info.<a class="code" href="structztex__device__info.html#a02781851eb020d49d6a330b3675359b2">default_in_ep</a>, mbuf, BULK_BUF_SIZE, &transferred, 4000));</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Bulk read error: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> {</div>
<div class="line"> <span class="keywordtype">int</span> i=mbuf[0]>>7;</div>
<div class="line"> <span class="keywordtype">int</span> j=mbuf[i] | ((mbuf[i+1] & 127)<<7);</div>
<div class="line"> printf(<span class="stringliteral">"Read-write test: read (%d=%d*512+%d) Bytes. %d leading Bytes lost"</span>, transferred, transferred/512, transferred&511, j*2 );</div>
<div class="line"> <span class="keywordflow">if</span> ( j ) printf(<span class="stringliteral">"(This may be platform specific)"</span> );</div>
<div class="line"> size = 0;</div>
<div class="line"> <span class="keywordflow">for</span> (i=i+2; i+1<transferred; i+=2) {</div>
<div class="line"> <span class="keywordtype">int</span> k = mbuf[i] | ((mbuf[i+1] & 127)<<7);</div>
<div class="line"> <span class="keywordflow">if</span> ( k != ((j+1) & 0x3fff) ) size +=1;</div>
<div class="line"> j=k;</div>
<div class="line"> }</div>
<div class="line"> printf(<span class="stringliteral">". %d data errors. %d Bytes remaining in FIFO due to memory transfer granularity\n"</span>, size, RW_SIZE-transferred);</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"><span class="comment">// test 2: read rate test using test data generator (mode 1)</span></div>
<div class="line"> <span class="comment">// reset application and set mode 1</span></div>
<div class="line"> <a class="code" href="ztex_8h.html#a42bfe7c8c78b72c747531c370003edb9">ztex_default_reset</a>(handle,0);</div>
<div class="line"> status = <a class="code" href="ztex_8h.html#a4f0de67505fd5f34a15dc14cecf9d44f">ztex_default_gpio_ctl</a>(handle,7,1);</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Error setting GPIO's: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">// read data and measure time, first packets are ignored because EZ-USB buffer may be filled</span></div>
<div class="line"> printf(<span class="stringliteral">"Measuring read rate using libusb_bulk_transfer ... \n"</span>);</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> size=0;</div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<55; i++) {</div>
<div class="line"> <span class="keywordflow">if</span> ( i==5 ) gettimeofday(&tv1, NULL);</div>
<div class="line"> TWO_TRIES( status, libusb_bulk_transfer(handle, info.<a class="code" href="structztex__device__info.html#a02781851eb020d49d6a330b3675359b2">default_in_ep</a>, mbuf, BULK_BUF_SIZE, &transferred, 2000));</div>
<div class="line"> <span class="keywordflow">if</span> ( status < 0 ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Bulk read error: %s\n"</span>, libusb_error_name(status));</div>
<div class="line"> <span class="keywordflow">goto</span> err;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">if</span> ( (i==0) && ( (mbuf[0]!=0) && (mbuf[1]!=239) ) ) {</div>
<div class="line"> fprintf(stderr,<span class="stringliteral">"Warning: Invalid start of data: %d %d, leading data may went lost\n"</span>,mbuf[0], mbuf[1]);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">if</span> ( i>=5 ) size+=transferred;</div>
<div class="line"> }</div>
<div class="line"> gettimeofday(&tv2, NULL);</div>
<div class="line"> printf(<span class="stringliteral">"Read %.1f MB at %.1f MB/s\n"</span>, size/(1024.0*1024.0), size/( (tv2.tv_sec-tv1.tv_sec)*1e6 + (tv2.tv_usec-tv1.tv_usec) )); </div>
<div class="line"> fflush(stdout);</div>
<div class="line"></div>
<div class="line"> <span class="comment">// release resources</span></div>
<div class="line"> status = 0;</div>
<div class="line"> <span class="keywordflow">goto</span> noerr;</div>
<div class="line">err:</div>
<div class="line"> status = 1;</div>
<div class="line">noerr:</div>
<div class="line"> <span class="keywordflow">if</span> ( mbuf ) free(mbuf);</div>
<div class="line"> <span class="keywordflow">if</span> ( bitstream_fn ) free(bitstream_fn);</div>
<div class="line"> <span class="keywordflow">if</span> ( handle ) {</div>
<div class="line"> libusb_release_interface(handle,0);</div>
<div class="line"> libusb_close(handle);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">if</span> ( devs ) libusb_free_device_list(devs, 1);</div>
<div class="line"> libusb_exit(NULL);</div>
<div class="line"><span class="preprocessor">#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)</span></div>
<div class="line"> printf(<span class="stringliteral">"Press <return> to quit\n"</span>);</div>
<div class="line"> fflush(NULL);</div>
<div class="line"> fgetc(stdin);</div>
<div class="line"><span class="preprocessor">#endif </span></div>
<div class="line"> <span class="keywordflow">return</span> status;</div>
<div class="line">}</div>
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