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<p style="color: #777777;">
<a href="https://gitlab.rtems.org/sebhub">Sebastian Huber</a>
started a new
discussion on <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/206#note_112693">bsps/arm/stm32h7/spi/spi-support.c</a>:
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292
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC292" class="line" lang="c"><span class="p">{</span></span>
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<td class="new_line diff-line-num new" data-linenumber="293" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
293
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC293" class="line" lang="c"><span class="cp" style="color: #999999; font-weight: 600;">#ifdef STM32H7_SPI_USE_INTERRUPTS</span></span>
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<td class="new_line diff-line-num new" data-linenumber="294" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
294
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC294" class="line" lang="c"> <span class="n" style="color: #333333;">rtems_event_set</span> <span class="n" style="color: #333333;">received_events</span><span class="p">;</span></span>
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<td class="new_line diff-line-num new" data-linenumber="295" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
295
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC295" class="line" lang="c"> <span class="n" style="color: #333333;">rtems_status_code</span> <span class="n" style="color: #333333;">sc</span><span class="p">;</span></span>
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<td class="new_line diff-line-num new" data-linenumber="296" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
296
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC296" class="line" lang="c"> <span class="kt" style="color: #445588; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333333;">timeout_ticks</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333333;">timeout_ms</span><span class="p">;</span></span>
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<td class="new_line diff-line-num new" data-linenumber="297" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
297
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC297" class="line" lang="c"></span>
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<td class="new_line diff-line-num new" data-linenumber="298" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
298
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC298" class="line" lang="c"> <span class="n" style="color: #333333;">timeout_ticks</span> <span class="o" style="font-weight: 600;">/=</span> <span class="n" style="color: #333333;">rtems_configuration_get_milliseconds_per_tick</span><span class="p">();</span></span>
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<td class="new_line diff-line-num new" data-linenumber="299" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
299
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC299" class="line" lang="c"></span>
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<td class="new_line diff-line-num new" data-linenumber="300" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
300
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC300" class="line" lang="c"> <span class="n" style="color: #333333;">sc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333333;">rtems_event_receive</span><span class="p">(</span></span>
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<td class="new_line diff-line-num new" data-linenumber="301" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
301
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC301" class="line" lang="c"> <span class="n" style="color: #333333;">EVENT_ERROR</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333333;">EVENT_COMPLETE</span><span class="p">,</span></span>
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<td class="new_line diff-line-num new" data-linenumber="302" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
302
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC302" class="line" lang="c"> <span class="n" style="color: #333333;">RTEMS_WAIT</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333333;">RTEMS_EVENT_ANY</span><span class="p">,</span></span>
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<td class="new_line diff-line-num new" data-linenumber="303" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
303
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC303" class="line" lang="c"> <span class="n" style="color: #333333;">timeout_ticks</span><span class="p">,</span></span>
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<td class="new_line diff-line-num new" data-linenumber="304" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
304
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC304" class="line" lang="c"> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333333;">received_events</span></span>
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<td class="new_line diff-line-num new" data-linenumber="305" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
305
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC305" class="line" lang="c"> <span class="p">);</span></span>
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<td class="new_line diff-line-num new" data-linenumber="306" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
306
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC306" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333333;">sc</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333333;">RTEMS_SUCCESSFUL</span><span class="p">)</span> <span class="p">{</span></span>
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<td class="new_line diff-line-num new" data-linenumber="307" style="width: 35px; color: rgba(5,5,6,.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
307
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><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="LC307" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #009999;">1</span><span class="p">;</span></span>
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<p dir="auto" style="color: #28272d; margin: 0 0 16px;" align="initial">The return values in this driver make no sense to me. The documentation says:</p>
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<pre data-canonical-lang="c" class="code highlight js-syntax-highlight language-c" 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="c" style="margin-top: 0;"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;">/**</span></span>
<span id="LC2" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @brief SPI bus control.</span></span>
<span id="LC3" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> */</span></span>
<span id="LC4" class="line" lang="c"><span class="k" style="margin-top: 0; font-weight: 600;">struct</span> <span class="n" style="color: #333333;">spi_bus</span> <span class="p">{</span></span>
<span id="LC5" class="line" lang="c"> <span class="cm" style="margin-top: 0; color: #999988; font-style: italic;">/**</span></span>
<span id="LC6" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @brief Transfers SPI messages.</span></span>
<span id="LC7" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> *</span></span>
<span id="LC8" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @param[in] bus The bus control.</span></span>
<span id="LC9" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @param[in] msgs The messages to transfer.</span></span>
<span id="LC10" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @param[in] msg_count The count of messages to transfer. It must be</span></span>
<span id="LC11" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * positive.</span></span>
<span id="LC12" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> *</span></span>
<span id="LC13" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @retval 0 Successful operation.</span></span>
<span id="LC14" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> * @retval negative Negative error number in case of an error.</span></span>
<span id="LC15" class="line" lang="c"><span class="cm" style="margin-top: 0; color: #999988; font-style: italic;"> */</span></span>
<span id="LC16" class="line" lang="c"> <span class="kt" style="margin-top: 0; color: #445588; font-weight: 600;">int</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333333;">transfer</span><span class="p">)(</span><span class="n" style="color: #333333;">spi_bus</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333333;">bus</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <span class="n" style="color: #333333;">spi_ioc_transfer</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333333;">msgs</span><span class="p">,</span> <span class="kt" style="color: #445588; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333333;">msg_count</span><span class="p">);</span></span></code></pre>
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