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<a href="https://gitlab.rtems.org/matteo.concas">Matteo Concas</a>
commented on a
discussion on <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/273#note_113963">bsps/shared/grlib/1553/b1553rt.c</a>:
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC745" class="line" lang="c"> <span class="n" style="color: #333333;">tsw</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333333;">READ_DMA</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333333;">rt</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333333;">mem</span><span class="p">[</span><span class="n" style="color: #333333;">tx</span><span class="o" style="font-weight: 600;">*</span><span class="mh" style="color: #009999;">0x3E0</span><span class="o" style="font-weight: 600;">+</span><span class="n" style="color: #333333;">suba</span><span class="p">]);</span> </span>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC746" class="line" lang="c"></span>
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747
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC747" class="line" lang="c"> <span class="cm" style="color: #999988; font-style: italic;">/* Build Message Information Word (B1553BRM-style) */</span></span>
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<td class="old_line diff-line-num old" data-linenumber="748" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="new_line diff-line-num old" data-linenumber="748" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>-<span id="LC748" class="line" lang="c"> <span class="n" style="color: #333333;">miw</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333333;">wc</span><span class="o" style="font-weight: 600;"><<</span><span class="mi" style="color: #009999;">11</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333333;">tsw</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333333;">RT_TSW_BUS</span><span class="p">)</span><span class="o" style="font-weight: 600;">>></span><span class="mi" style="color: #009999;">4</span> <span class="o" style="font-weight: 600;">|</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="n" style="color: #333333;">tsw</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333333;">RT_TSW_OK</span><span class="p">)</span><span class="o" style="font-weight: 600;"><span class="idiff left right deletion" style="background-color: #fac5cd;">>></span></span><span class="mi" style="color: #009999;">7</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333333;">tsw</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333333;">RT_TSW_ILL</span><span class="p">)</span><span class="o" style="font-weight: 600;">>></span><span class="mi" style="color: #009999;">5</span> <span class="o" style="font-weight: 600;">|</span> </span>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">The <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>RT_TSW_OK</code> field is set to 1 if there was no error.
The Message Error (ME) field indicates an error and must be set to 0 if there was no error so the result of <code style='font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>tsw&RT_TSW_OK</code> must be negated.</p>
<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">Another way to do this would be</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style="display: block; font-size: 90%; color: #28272d; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: monospace; word-break: break-all; word-wrap: break-word; background-color: #ffffff; -premailer-cellpadding: 0; -premailer-cellspacing: 0; -premailer-width: 100%; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;"><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">~(tsw&RT_TSW_OK)>>7 & (1<<7)</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
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<p dir="auto" style="color: #28272d; margin: 0;" align="initial">But I don't think this is be cleaner than the current fix.</p>
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