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33 
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34 
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105 
<div class="title">memfifo.c File Reference</div>  </div>
106 
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107 
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108 
 
109 
<p>memfifo example for C.
110 
<a href="#details">More...</a></p>
111 
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
112 
<div class="textblock"><p>memfifo example for C. </p>
113 
<p>This example demonstrates the usage of the C API and the high speed interface of the default firmware.</p>
114 
<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>
115 
<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>
116 
<p>Full list of options can be obtained with '-h' </p><div class="fragment"><div class="line"><span class="comment">/*#</span></div>
117 
<div class="line"><span class="comment">   ZTEX Core API for C with examples</span></div>
118 
<div class="line"><span class="comment">   Copyright (C) 2009-2017 ZTEX GmbH.</span></div>
119 
<div class="line"><span class="comment">   http://www.ztex.de</span></div>
120 
<div class="line"><span class="comment"></span></div>
121 
<div class="line"><span class="comment">   This program is free software; you can redistribute it and/or modify</span></div>
122 
<div class="line"><span class="comment">   it under the terms of the GNU General Public License version 3 as</span></div>
123 
<div class="line"><span class="comment">   published by the Free Software Foundation.</span></div>
124 
<div class="line"><span class="comment"></span></div>
125 
<div class="line"><span class="comment">   This program is distributed in the hope that it will be useful, but</span></div>
126 
<div class="line"><span class="comment">   WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
127 
<div class="line"><span class="comment">   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
128 
<div class="line"><span class="comment">   General Public License for more details.</span></div>
129 
<div class="line"><span class="comment"></span></div>
130 
<div class="line"><span class="comment">   You should have received a copy of the GNU General Public License</span></div>
131 
<div class="line"><span class="comment">   along with this program; if not, see http://www.gnu.org/licenses/.</span></div>
132 
<div class="line"><span class="comment">#*/</span></div>
133 
<div class="line"></div>
134 
<div class="line"><span class="preprocessor">#include &lt;stdio.h&gt;</span></div>
135 
<div class="line"><span class="preprocessor">#include &lt;stdarg.h&gt;</span></div>
136 
<div class="line"><span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
137 
<div class="line"><span class="preprocessor">#include &lt;string.h&gt;</span></div>
138 
<div class="line"><span class="preprocessor">#include &lt;fcntl.h&gt;</span></div>
139 
<div class="line"><span class="preprocessor">#include &lt;sys/types.h&gt;</span></div>
140 
<div class="line"><span class="preprocessor">#include &lt;sys/time.h&gt;</span></div>
141 
<div class="line"><span class="preprocessor">#include &lt;libusb-1.0/libusb.h&gt;</span></div>
142 
<div class="line"></div>
143 
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="ztex_8h.html">ztex.h</a>&quot;</span></div>
144 
<div class="line"></div>
145 
<div class="line"><span class="preprocessor">#define BULK_BUF_SIZE 4*1024*1024</span></div>
146 
<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>
147 
<div class="line"></div>
148 
<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>
149 
<div class="line"></div>
150 
<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>
151 
<div class="line">{</div>
152 
<div class="line">    fprintf(stderr, <span class="stringliteral">&quot;Usage: %s options\n&quot;</span>,prog_name);</div>
153 
<div class="line">    fprintf(stderr, <span class="stringliteral">&quot;  -h                           Display this usage information\n&quot;</span></div>
154 
<div class="line">                    <span class="stringliteral">&quot;  -fu &lt;vendor ID&gt;:&lt;product ID&gt; Select device by USB IDs, default: 0x221A:0x100, &lt;0:ignore ID\n&quot;</span></div>
155 
<div class="line">                    <span class="stringliteral">&quot;  -fd &lt;bus&gt;:&lt;device&gt;           Select device by bus number and device address\n&quot;</span></div>
156 
<div class="line">                    <span class="stringliteral">&quot;  -fs &lt;string&gt;                 Select device by serial number string\n&quot;</span></div>
157 
<div class="line">                    <span class="stringliteral">&quot;  -fp &lt;string&gt;                 Select device by product string\n&quot;</span></div>
158 
<div class="line">                    <span class="stringliteral">&quot;  -s &lt;path&gt;                    Additional search path for bitstream, default &#39;..&quot;</span>DIRSEP<span class="stringliteral">&quot;..&quot;</span>DIRSEP<span class="stringliteral">&quot;examples&quot;</span>DIRSEP<span class="stringliteral">&quot;memfifo&#39;\n&quot;</span></div>
159 
<div class="line">                    <span class="stringliteral">&quot;  -r                           Reset device (default: reset configuration only)\n&quot;</span></div>
160 
<div class="line">                    <span class="stringliteral">&quot;  -i                           Print device info\n&quot;</span></div>
161 
<div class="line">                    <span class="stringliteral">&quot;  -p                           Print matching USB devices\n&quot;</span></div>
162 
<div class="line">                    <span class="stringliteral">&quot;  -pa                          Print all USB devices\n&quot;</span></div>
163 
<div class="line">            );</div>
164 
<div class="line">    <span class="keywordflow">if</span> ( format ) {</div>
165 
<div class="line">        va_list args;</div>
166 
<div class="line">        va_start(args,format);</div>
167 
<div class="line">        vfprintf(stderr, format, args);</div>
168 
<div class="line">        va_end(args);</div>
169 
<div class="line">        <span class="keywordflow">return</span> 1;</div>
170 
<div class="line">    }</div>
171 
<div class="line">    <span class="keywordflow">return</span> 0;</div>
172 
<div class="line">}</div>
173 
<div class="line"></div>
174 
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
175 
<div class="line">{</div>
176 
<div class="line">    <span class="keywordtype">int</span> id_vendor = 0x221A;     <span class="comment">// ZTEX vendor ID</span></div>
177 
<div class="line">    <span class="keywordtype">int</span> id_product = 0x100;     <span class="comment">// default product ID for ZTEX firmware</span></div>
178 
<div class="line">    <span class="keywordtype">int</span> status = 0;</div>
179 
<div class="line">    libusb_device **devs = NULL;</div>
180 
<div class="line">    <span class="keywordtype">int</span> print_all=0, print=0, print_info=0, reset_dev=0;</div>
181 
<div class="line">    <span class="keywordtype">int</span> busnum = -1, devnum = -1;</div>
182 
<div class="line">    <span class="keywordtype">char</span> *sn_string = NULL, *product_string = NULL;</div>
183 
<div class="line">    libusb_device_handle *handle = NULL;</div>
184 
<div class="line">    <a class="code" href="structztex__device__info.html">ztex_device_info</a> info;</div>
185 
<div class="line">    <span class="keywordtype">char</span> *bitstream_fn = NULL, *bitstream_path = NULL;</div>
186 
<div class="line">    <span class="keywordtype">char</span> sbuf[8192];</div>
187 
<div class="line">    <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *mbuf = NULL;</div>
188 
<div class="line">    <span class="keywordtype">int</span> transferred, size;</div>
189 
<div class="line">    <span class="keyword">struct </span>timeval tv1,tv2;</div>
190 
<div class="line"></div>
191 
<div class="line">    <span class="comment">// process parameters</span></div>
192 
<div class="line">    prog_name = argv[0];</div>
193 
<div class="line">    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i&lt;argc; i++) {</div>
194 
<div class="line">        <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-h&quot;</span>) ) <span class="keywordflow">return</span> paramerr(NULL);</div>
195 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-p&quot;</span>) ) print=1;</div>
196 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-pa&quot;</span>) ) print_all=1;</div>
197 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-i&quot;</span>) ) print_info=1;</div>
198 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-r&quot;</span>) ) reset_dev=1;</div>
199 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-fu&quot;</span>) ) {</div>
200 
<div class="line">            i++;</div>
201 
<div class="line">            <span class="keywordflow">if</span> (i&gt;=argc || sscanf(argv[i],<span class="stringliteral">&quot;%i:%i&quot;</span>, &amp;id_vendor, &amp;id_product)!=2 ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: &lt;vendor ID&gt;:&lt;product ID&gt; expected after -fu\n&quot;</span>);</div>
202 
<div class="line">        }</div>
203 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-fd&quot;</span>) ) {</div>
204 
<div class="line">            i++;</div>
205 
<div class="line">            <span class="keywordflow">if</span> (i&gt;=argc || sscanf(argv[i],<span class="stringliteral">&quot;%i:%i&quot;</span>, &amp;busnum, &amp;devnum)!=2 ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: &lt;bus&gt;:&lt;device&gt; expected after -fd\n&quot;</span>);</div>
206 
<div class="line">        }</div>
207 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-fs&quot;</span>) ) {</div>
208 
<div class="line">            i++;</div>
209 
<div class="line">            <span class="keywordflow">if</span> (i&gt;=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: &lt;string&gt; expected after -fs\n&quot;</span>);</div>
210 
<div class="line">            sn_string = argv[i];</div>
211 
<div class="line">        }</div>
212 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-fp&quot;</span>) ) {</div>
213 
<div class="line">            i++;</div>
214 
<div class="line">            <span class="keywordflow">if</span> (i&gt;=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: &lt;string&gt; expected after -fp\n&quot;</span>);</div>
215 
<div class="line">            product_string = argv[i];</div>
216 
<div class="line">        }</div>
217 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( !strcmp(argv[i],<span class="stringliteral">&quot;-s&quot;</span>) ) {</div>
218 
<div class="line">            i++;</div>
219 
<div class="line">            <span class="keywordflow">if</span> (i&gt;=argc ) <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: &lt;path&gt; expected after -s\n&quot;</span>);</div>
220 
<div class="line">            bitstream_path = argv[i];</div>
221 
<div class="line">        }</div>
222 
<div class="line">        <span class="keywordflow">else</span> <span class="keywordflow">return</span> paramerr(<span class="stringliteral">&quot;Error: Invalid parameter %s\n&quot;</span>, argv[i]);</div>
223 
<div class="line">    }</div>
224 
<div class="line">    </div>
225 
<div class="line">    </div>
226 
<div class="line">    <span class="comment">// INIT libusb</span></div>
227 
<div class="line">    status = libusb_init(NULL);</div>
228 
<div class="line">    <span class="keywordflow">if</span> (status &lt; 0) {</div>
229 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to init libusb: %s\n&quot;</span>, libusb_error_name(status));</div>
230 
<div class="line">        <span class="keywordflow">return</span> 1;</div>
231 
<div class="line">    }</div>
232 
<div class="line"></div>
233 
<div class="line">    <span class="comment">// find all USB devices</span></div>
234 
<div class="line">    status = libusb_get_device_list(NULL, &amp;devs);</div>
235 
<div class="line">    <span class="keywordflow">if</span> (status &lt; 0) {</div>
236 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to get device list: %s\n&quot;</span>, libusb_error_name(status));</div>
237 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
238 
<div class="line">    }</div>
239 
<div class="line">    </div>
240 
<div class="line">    <span class="comment">// print bus info or find device</span></div>
241 
<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>
242 
<div class="line">    printf(sbuf);</div>
243 
<div class="line">    fflush(stdout);</div>
244 
<div class="line">    <span class="keywordflow">if</span> ( print || print_all ) {</div>
245 
<div class="line">        status = 0;</div>
246 
<div class="line">        <span class="keywordflow">goto</span> noerr;</div>
247 
<div class="line">    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( dev_idx&lt;0 ) {</div>
248 
<div class="line">        <span class="keywordflow">if</span> (dev_idx==-1) fprintf(stderr,<span class="stringliteral">&quot;Error: No device found\n&quot;</span>);</div>
249 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
250 
<div class="line">    }</div>
251 
<div class="line"></div>
252 
<div class="line">    <span class="comment">// open device</span></div>
253 
<div class="line">    status = libusb_open(devs[dev_idx], &amp;handle);</div>
254 
<div class="line">    <span class="keywordflow">if</span> (status &lt; 0) {</div>
255 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to open device: %s\n&quot;</span>, libusb_error_name(status));</div>
256 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
257 
<div class="line">    }</div>
258 
<div class="line">    libusb_free_device_list(devs, 1);</div>
259 
<div class="line">    devs=NULL;</div>
260 
<div class="line">    </div>
261 
<div class="line">    <span class="comment">// reset configuration or device</span></div>
262 
<div class="line">   <span class="keywordflow">if</span> ( ! reset_dev ) {</div>
263 
<div class="line">        status = libusb_set_configuration(handle,-1);</div>
264 
<div class="line">        <span class="keywordflow">if</span> (status &lt; 0) {</div>
265 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Warning: Unable to unconfigure device: %s, trying to reset it\n&quot;</span>, libusb_error_name(status));</div>
266 
<div class="line"><span class="preprocessor">#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)</span></div>
267 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Due to limitations of Windows neither this nor device reset works. This may cause further errors ...\n&quot;</span>);</div>
268 
<div class="line"><span class="preprocessor">#endif    </span></div>
269 
<div class="line">            reset_dev = 1;</div>
270 
<div class="line">        }</div>
271 
<div class="line">    }</div>
272 
<div class="line">    <span class="keywordflow">if</span> ( reset_dev ) {</div>
273 
<div class="line">        status = libusb_reset_device(handle);</div>
274 
<div class="line">        <span class="keywordflow">if</span> (status &lt; 0) {</div>
275 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to reset device: %s\n&quot;</span>, libusb_error_name(status));</div>
276 
<div class="line">            <span class="keywordflow">goto</span> err;</div>
277 
<div class="line">        }</div>
278 
<div class="line">    }</div>
279 
<div class="line">    status = libusb_set_configuration(handle,1);</div>
280 
<div class="line">    <span class="keywordflow">if</span> (status &lt; 0) fprintf(stderr,<span class="stringliteral">&quot;Warning: Unable to set configuration 1: %s\n&quot;</span>, libusb_error_name(status));</div>
281 
<div class="line">    fflush(stderr);</div>
282 
<div class="line"></div>
283 
<div class="line">    <span class="comment">// get and print device info</span></div>
284 
<div class="line">    status = <a class="code" href="ztex_8h.html#a28cef9d1e168b782b03579c4a59505d3">ztex_get_device_info</a>(handle, &amp;info);</div>
285 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
286 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to get device info: %s\n&quot;</span>, libusb_error_name(status));</div>
287 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
288 
<div class="line">    }</div>
289 
<div class="line">    <span class="keywordflow">if</span> ( print_info ) {</div>
290 
<div class="line">        <a class="code" href="ztex_8h.html#aa64c1cefed076a0f48cafa1882593c79">ztex_print_device_info</a>( sbuf, <span class="keyword">sizeof</span>(sbuf), &amp;info );</div>
291 
<div class="line">        printf(sbuf);</div>
292 
<div class="line">        status = <a class="code" href="ztex_8h.html#ae679e66864c90211a3d8b4670a64d497">ztex_get_fpga_config</a>(handle);</div>
293 
<div class="line">        <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
294 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to get FPGA configuration state: %s\n&quot;</span>, libusb_error_name(status));</div>
295 
<div class="line">            <span class="keywordflow">goto</span> err;</div>
296 
<div class="line">        }</div>
297 
<div class="line">        printf(<span class="stringliteral">&quot;FPGA: %s\n&quot;</span>, status==0 ? <span class="stringliteral">&quot;unconfigured&quot;</span> : <span class="stringliteral">&quot;configured&quot;</span>);</div>
298 
<div class="line">        status = 0;</div>
299 
<div class="line">        <span class="keywordflow">goto</span> noerr;</div>
300 
<div class="line">    }</div>
301 
<div class="line">    </div>
302 
<div class="line">    <span class="comment">// find bitstream</span></div>
303 
<div class="line">    bitstream_fn = <a class="code" href="ztex_8h.html#a74c89f5aa7e3754d88f1dc95846b5cbe">ztex_find_bitstream</a>( &amp;info, bitstream_path ? bitstream_path : <span class="stringliteral">&quot;..&quot;</span>DIRSEP<span class="stringliteral">&quot;..&quot;</span>DIRSEP<span class="stringliteral">&quot;examples&quot;</span>DIRSEP<span class="stringliteral">&quot;memfifo&quot;</span> , <span class="stringliteral">&quot;memfifo&quot;</span>);</div>
304 
<div class="line">    <span class="keywordflow">if</span> ( bitstream_fn )  {</div>
305 
<div class="line">        printf(<span class="stringliteral">&quot;Using bitstream &#39;%s&#39;\n&quot;</span>, bitstream_fn);</div>
306 
<div class="line">        fflush(stdout);</div>
307 
<div class="line">    }</div>
308 
<div class="line">    <span class="keywordflow">else</span> {</div>
309 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Warning: Bitstream not found\n&quot;</span>);</div>
310 
<div class="line">        <span class="keywordflow">goto</span> nobitstream;</div>
311 
<div class="line">    }</div>
312 
<div class="line">    </div>
313 
<div class="line">    <span class="comment">// read and upload bitstream</span></div>
314 
<div class="line">    FILE *fd = fopen(bitstream_fn, <span class="stringliteral">&quot;rb&quot;</span>);</div>
315 
<div class="line">    <span class="keywordflow">if</span> ( fd == NULL ) {</div>
316 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Warning: Error opening file &#39;%s&#39;\n&quot;</span>, bitstream_fn);</div>
317 
<div class="line">        <span class="keywordflow">goto</span> nobitstream;</div>
318 
<div class="line">    }</div>
319 
<div class="line">    status = <a class="code" href="ztex_8h.html#a1861aa844f2ad3cacf37bbde0f9d6bcb">ztex_upload_bitstream</a>(sbuf,<span class="keyword">sizeof</span>(sbuf),handle,&amp;info,fd,-1);</div>
320 
<div class="line">    fclose(fd);</div>
321 
<div class="line">    fprintf(stderr,sbuf);</div>
322 
<div class="line"></div>
323 
<div class="line">nobitstream:</div>
324 
<div class="line">    fflush(stderr);</div>
325 
<div class="line">    <span class="comment">// check config</span></div>
326 
<div class="line">    status = <a class="code" href="ztex_8h.html#ae679e66864c90211a3d8b4670a64d497">ztex_get_fpga_config</a>(handle);</div>
327 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
328 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: Unable to get FPGA configuration state: %s\n&quot;</span>, libusb_error_name(status));</div>
329 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
330 
<div class="line">    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( status == 0 ) {</div>
331 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error: FPGA not configured\n&quot;</span>);</div>
332 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
333 
<div class="line">    }</div>
334 
<div class="line"></div>
335 
<div class="line">    <span class="comment">// claim interface</span></div>
336 
<div class="line">    status = libusb_claim_interface(handle, 0); </div>
337 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
338 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error claiming interface 0: %s\n&quot;</span>, libusb_error_name(status));</div>
339 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
340 
<div class="line">    }</div>
341 
<div class="line"></div>
342 
<div class="line">    mbuf = malloc(BULK_BUF_SIZE);</div>
343 
<div class="line">    <span class="keywordflow">if</span> ( !mbuf ) {</div>
344 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error allocating %d bytes\n&quot;</span>, BULK_BUF_SIZE);</div>
345 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
346 
<div class="line">    }</div>
347 
<div class="line"></div>
348 
<div class="line"><span class="comment">// verify mode and prepare device if necessary</span></div>
349 
<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>
350 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Warning: wrong initial mode, switching to mode 0\n&quot;</span>);</div>
351 
<div class="line">        <a class="code" href="ztex_8h.html#a4f0de67505fd5f34a15dc14cecf9d44f">ztex_default_gpio_ctl</a>(handle,7,0);</div>
352 
<div class="line">        <a class="code" href="ztex_8h.html#a42bfe7c8c78b72c747531c370003edb9">ztex_default_reset</a>(handle,0);</div>
353 
<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, &amp;transferred, 250);</div>
354 
<div class="line">    } <span class="keywordflow">else</span> {</div>
355 
<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, &amp;transferred, 250);</div>
356 
<div class="line">        <span class="keywordflow">if</span> ( (status&gt;=0) &amp;&amp; (transferred&gt;0) ) fprintf(stderr,<span class="stringliteral">&quot;Warning: found %d bytes in EZ-USB FIFO\n&quot;</span>, transferred);</div>
357 
<div class="line">    }</div>
358 
<div class="line">    fflush(stderr);</div>
359 
<div class="line"></div>
360 
<div class="line"><span class="comment">// test 1: read-write test (mode 0)</span></div>
361 
<div class="line">    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i&lt;RW_SIZE; i+=2) {</div>
362 
<div class="line">        mbuf[i] = (i&gt;&gt;1) &amp; 127;</div>
363 
<div class="line">        mbuf[i+1] = 128 | ((i &gt;&gt; 8 ) &amp; 127);</div>
364 
<div class="line">    }</div>
365 
<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, &amp;transferred, 2000));</div>
366 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
367 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Bulk write error: %s\n&quot;</span>, libusb_error_name(status));</div>
368 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
369 
<div class="line">    }</div>
370 
<div class="line">    printf(<span class="stringliteral">&quot;Read-write test, short packet test: wrote %d Bytes\n&quot;</span>, transferred);</div>
371 
<div class="line">    fflush(stdout);</div>
372 
<div class="line">    </div>
373 
<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, &amp;transferred, 4000));</div>
374 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
375 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Bulk read error: %s\n&quot;</span>, libusb_error_name(status));</div>
376 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
377 
<div class="line">    }</div>
378 
<div class="line">    {</div>
379 
<div class="line">        <span class="keywordtype">int</span> i=mbuf[0]&gt;&gt;7;</div>
380 
<div class="line">        <span class="keywordtype">int</span> j=mbuf[i] | ((mbuf[i+1] &amp; 127)&lt;&lt;7);</div>
381 
<div class="line">        printf(<span class="stringliteral">&quot;Read-write test: read (%d=%d*512+%d) Bytes.  %d leading Bytes lost&quot;</span>, transferred, transferred/512, transferred&amp;511, j*2  );</div>
382 
<div class="line">        <span class="keywordflow">if</span> ( j ) printf(<span class="stringliteral">&quot;(This may be platform specific)&quot;</span> );</div>
383 
<div class="line">        size = 0;</div>
384 
<div class="line">        <span class="keywordflow">for</span> (i=i+2; i+1&lt;transferred; i+=2) {</div>
385 
<div class="line">            <span class="keywordtype">int</span> k = mbuf[i] | ((mbuf[i+1] &amp; 127)&lt;&lt;7);</div>
386 
<div class="line">            <span class="keywordflow">if</span> ( k != ((j+1) &amp; 0x3fff) ) size +=1;</div>
387 
<div class="line">            j=k;</div>
388 
<div class="line">        }</div>
389 
<div class="line">        printf(<span class="stringliteral">&quot;. %d data errors.  %d Bytes remaining in FIFO due to memory transfer granularity\n&quot;</span>, size, RW_SIZE-transferred);</div>
390 
<div class="line">        fflush(stdout);</div>
391 
<div class="line">    }</div>
392 
<div class="line"></div>
393 
<div class="line"><span class="comment">// test 2: read rate test using test data generator (mode 1)</span></div>
394 
<div class="line">    <span class="comment">// reset application and set mode 1</span></div>
395 
<div class="line">    <a class="code" href="ztex_8h.html#a42bfe7c8c78b72c747531c370003edb9">ztex_default_reset</a>(handle,0);</div>
396 
<div class="line">    status = <a class="code" href="ztex_8h.html#a4f0de67505fd5f34a15dc14cecf9d44f">ztex_default_gpio_ctl</a>(handle,7,1);</div>
397 
<div class="line">    <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
398 
<div class="line">        fprintf(stderr,<span class="stringliteral">&quot;Error setting GPIO&#39;s: %s\n&quot;</span>, libusb_error_name(status));</div>
399 
<div class="line">        <span class="keywordflow">goto</span> err;</div>
400 
<div class="line">    }</div>
401 
<div class="line"></div>
402 
<div class="line">    <span class="comment">// read data and measure time, first packets are ignored because EZ-USB buffer may be filled</span></div>
403 
<div class="line">    printf(<span class="stringliteral">&quot;Measuring read rate using libusb_bulk_transfer ... \n&quot;</span>);</div>
404 
<div class="line">    fflush(stdout);</div>
405 
<div class="line">    size=0;</div>
406 
<div class="line">    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i&lt;55; i++) {</div>
407 
<div class="line">        <span class="keywordflow">if</span> ( i==5 ) gettimeofday(&amp;tv1, NULL);</div>
408 
<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, &amp;transferred, 2000));</div>
409 
<div class="line">        <span class="keywordflow">if</span> ( status &lt; 0 ) {</div>
410 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Bulk read error: %s\n&quot;</span>, libusb_error_name(status));</div>
411 
<div class="line">            <span class="keywordflow">goto</span> err;</div>
412 
<div class="line">        }</div>
413 
<div class="line">        <span class="keywordflow">if</span> ( (i==0) &amp;&amp; ( (mbuf[0]!=0) &amp;&amp; (mbuf[1]!=239) ) ) {</div>
414 
<div class="line">            fprintf(stderr,<span class="stringliteral">&quot;Warning: Invalid start of data: %d %d, leading data may went lost\n&quot;</span>,mbuf[0], mbuf[1]);</div>
415 
<div class="line">        }</div>
416 
<div class="line">        <span class="keywordflow">if</span> ( i&gt;=5 ) size+=transferred;</div>
417 
<div class="line">    }</div>
418 
<div class="line">    gettimeofday(&amp;tv2, NULL);</div>
419 
<div class="line">    printf(<span class="stringliteral">&quot;Read %.1f MB at %.1f MB/s\n&quot;</span>, size/(1024.0*1024.0), size/( (tv2.tv_sec-tv1.tv_sec)*1e6 + (tv2.tv_usec-tv1.tv_usec) )); </div>
420 
<div class="line">    fflush(stdout);</div>
421 
<div class="line"></div>
422 
<div class="line">    <span class="comment">// release resources</span></div>
423 
<div class="line">    status = 0;</div>
424 
<div class="line">    <span class="keywordflow">goto</span> noerr;</div>
425 
<div class="line">err:</div>
426 
<div class="line">    status = 1;</div>
427 
<div class="line">noerr:</div>
428 
<div class="line">    <span class="keywordflow">if</span> ( mbuf ) free(mbuf);</div>
429 
<div class="line">    <span class="keywordflow">if</span> ( bitstream_fn ) free(bitstream_fn);</div>
430 
<div class="line">    <span class="keywordflow">if</span> ( handle ) {</div>
431 
<div class="line">        libusb_release_interface(handle,0);</div>
432 
<div class="line">        libusb_close(handle);</div>
433 
<div class="line">    }</div>
434 
<div class="line">    <span class="keywordflow">if</span> ( devs ) libusb_free_device_list(devs, 1);</div>
435 
<div class="line">    libusb_exit(NULL);</div>
436 
<div class="line"><span class="preprocessor">#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)</span></div>
437 
<div class="line">    printf(<span class="stringliteral">&quot;Press &lt;return&gt; to quit\n&quot;</span>);</div>
438 
<div class="line">    fflush(NULL);</div>
439 
<div class="line">    fgetc(stdin);</div>
440 
<div class="line"><span class="preprocessor">#endif    </span></div>
441 
<div class="line">    <span class="keywordflow">return</span> status;</div>
442 
<div class="line">}</div>
443 
</div><!-- fragment --> </div></div><!-- contents -->
444 
</div><!-- doc-content -->
445 
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