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| <div class="section" id="gpio"> |
| <h1>GPIO<a class="headerlink" href="#gpio" title="Permalink to this headline">¶</a></h1> |
| <p>This is the hardware independent GPIO (General Purpose Input Output) |
| Interface for Mynewt.</p> |
| <div class="section" id="description"> |
| <h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2> |
| <p>Contains the basic operations to set and read General Purpose Digital |
| I/O Pins within a Mynewt system.</p> |
| <p>Individual GPIOs are referenced in the APIs as <code class="docutils literal notranslate"><span class="pre">pins</span></code>. However, in |
| this interface the <code class="docutils literal notranslate"><span class="pre">pins</span></code> are virtual GPIO pins. The MCU header file |
| maps these virtual <code class="docutils literal notranslate"><span class="pre">pins</span></code> to the physical GPIO ports and pins.</p> |
| <p>Typically, the BSP code may define named I/O pins in terms of these |
| virtual <code class="docutils literal notranslate"><span class="pre">pins</span></code> to describe the devices attached to the physical pins.</p> |
| <p>Here’s a brief example so you can get the gist of the translation.</p> |
| <p>Suppose my product uses the stm32F4xx processor. There already exists |
| support for this processor within Mynewt. The processor has N ports |
| (A,B,C..) of 16 GPIO pins per port. The MCU hal_gpio driver maps these |
| to a set of virtual pins 0-N where port A maps to 0-15, Port B maps to |
| 16-31, Port C maps to 32-47 and so on. The exact number of physical port |
| (and virtual port pins) depends on the specific variant of the |
| stm32F4xx.</p> |
| <p>So if I want to turn on port B pin 3, that would be virtual pin 1*16 + |
| 3 = 19. This translation is defined in the MCU implementation of |
| <a class="reference external" href="https://github.com/apache/mynewt-core/blob/master/hw/mcu/stm/stm32_common/src/hal_gpio.c">hal_gpio.c</a> |
| for the stm32. Each MCU will typically have a different translation |
| method depending on its GPIO architecture.</p> |
| <p>Now, when writing a BSP, it’s common to give names to the relevant port |
| pins that you are using. Thus, the BSP may define a mapping between a |
| function and a virtual port pin in the <code class="docutils literal notranslate"><span class="pre">bsp.h</span></code> header file for the |
| BSP. For example,</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">#</span>define<span class="w"> </span>SYSTEM_LED<span class="w"> </span><span class="o">(</span><span class="m">37</span><span class="o">)</span> |
| <span class="gp">#</span>define<span class="w"> </span>FLASH_SPI_CHIP_SELECT<span class="w"> </span><span class="o">(</span><span class="m">3</span><span class="o">)</span> |
| </pre></div> |
| </div> |
| <p>would map the system indicator LED to virtual pin 37 which on the |
| stm32F4xx would be Port C pin 5 and the chip select line for the |
| external SPI flash to virtual pin 3 which on the stm32F4xxis port A pin |
| 3.</p> |
| <p>Said another way, in this specific system we get</p> |
| <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">SYSTEM_LED --> hal_gpio virtual pin 37 --> port C pin 5 on the stm34F4xx</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="api"> |
| <h2>API<a class="headerlink" href="#api" title="Permalink to this headline">¶</a></h2> |
| <dl class="c enum"> |
| <dt id="c.hal_gpio_mode_e"> |
| <span class="target" id="group___h_a_l_gpio_1ga05d33c14218c9a540b36d8368cfccc4e"></span><em class="property"><span class="pre">enum</span> </em><code class="sig-name descname"><span class="pre">hal_gpio_mode_e</span></code><a class="headerlink" href="#c.hal_gpio_mode_e" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>The “mode” of the gpio. </p> |
| <p>The gpio is either an input, output, or it is “not connected” (the pin specified is not functioning as a gpio) </p> |
| <p><em>Values:</em></p> |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_mode_e.HAL_GPIO_MODE_NC"> |
| <span class="target" id="group___h_a_l_gpio_1gga05d33c14218c9a540b36d8368cfccc4ea7a0bc7ac854ea5d1d5cdd5afdb574943"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_MODE_NC</span></code><a class="headerlink" href="#c.hal_gpio_mode_e.HAL_GPIO_MODE_NC" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Not connected. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_mode_e.HAL_GPIO_MODE_IN"> |
| <span class="target" id="group___h_a_l_gpio_1gga05d33c14218c9a540b36d8368cfccc4ea1cdd3f47a122d021908af28514135b0d"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_MODE_IN</span></code><a class="headerlink" href="#c.hal_gpio_mode_e.HAL_GPIO_MODE_IN" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Input. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_mode_e.HAL_GPIO_MODE_OUT"> |
| <span class="target" id="group___h_a_l_gpio_1gga05d33c14218c9a540b36d8368cfccc4ea4c7f8a4977ea851187d600bc390e9e90"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_MODE_OUT</span></code><a class="headerlink" href="#c.hal_gpio_mode_e.HAL_GPIO_MODE_OUT" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Output. </p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="c enum"> |
| <dt id="c.hal_gpio_pull"> |
| <span class="target" id="group___h_a_l_gpio_1ga7d6c41232ae1659321fdb8d83ecb0602"></span><em class="property"><span class="pre">enum</span> </em><code class="sig-name descname"><span class="pre">hal_gpio_pull</span></code><a class="headerlink" href="#c.hal_gpio_pull" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p><em>Values:</em></p> |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_pull.HAL_GPIO_PULL_NONE"> |
| <span class="target" id="group___h_a_l_gpio_1gga7d6c41232ae1659321fdb8d83ecb0602a1bf6748c4e1ad5b4ef9257f9146be798"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_PULL_NONE</span></code><a class="headerlink" href="#c.hal_gpio_pull.HAL_GPIO_PULL_NONE" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Pull-up/down not enabled. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_pull.HAL_GPIO_PULL_UP"> |
| <span class="target" id="group___h_a_l_gpio_1gga7d6c41232ae1659321fdb8d83ecb0602a877c8cc65df5733424ba21e788890d08"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_PULL_UP</span></code><a class="headerlink" href="#c.hal_gpio_pull.HAL_GPIO_PULL_UP" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Pull-up enabled. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_pull.HAL_GPIO_PULL_DOWN"> |
| <span class="target" id="group___h_a_l_gpio_1gga7d6c41232ae1659321fdb8d83ecb0602a386567f3dec876c7b850a2a1359535c2"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_PULL_DOWN</span></code><a class="headerlink" href="#c.hal_gpio_pull.HAL_GPIO_PULL_DOWN" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Pull-down enabled. </p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="c enum"> |
| <dt id="c.hal_gpio_irq_trigger"> |
| <span class="target" id="group___h_a_l_gpio_1ga746d10c5b6de39dba3ba87ccf699c790"></span><em class="property"><span class="pre">enum</span> </em><code class="sig-name descname"><span class="pre">hal_gpio_irq_trigger</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p><em>Values:</em></p> |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_NONE"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790ab293dbc504ffe6acfc94c10315934631"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_NONE</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_NONE" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_RISING"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790a619f7fff6a04445a9bfee1942100dd98"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_RISING</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_RISING" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>IRQ occurs on rising edge. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_FALLING"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790a3418cf236fda37588bbcd7b230ca3f75"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_FALLING</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_FALLING" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>IRQ occurs on falling edge. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_BOTH"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790aa5113a87c39a27cc38924cd2f3f0fb13"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_BOTH</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_BOTH" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>IRQ occurs on either edge. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_LOW"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790a0868ce8b2ed4b9d0225d7a9cf7327105"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_LOW</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_LOW" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>IRQ occurs when line is low. </p> |
| </dd></dl> |
| |
| <dl class="c enumerator"> |
| <dt id="c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_HIGH"> |
| <span class="target" id="group___h_a_l_gpio_1gga746d10c5b6de39dba3ba87ccf699c790a616f9424f3760152478d96720f78cb82"></span><em class="property"><span class="pre">enumerator</span> </em><code class="sig-name descname"><span class="pre">HAL_GPIO_TRIG_HIGH</span></code><a class="headerlink" href="#c.hal_gpio_irq_trigger.HAL_GPIO_TRIG_HIGH" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>IRQ occurs when line is high. </p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="c type"> |
| <dt id="c.hal_gpio_mode_t"> |
| <span class="target" id="group___h_a_l_gpio_1ga5040ea4ce60b1fa001963143c56123d4"></span><em class="property"><span class="pre">typedef</span> </em><em class="property"><span class="pre">enum</span></em> <a class="reference internal" href="#c.hal_gpio_mode_e" title="hal_gpio_mode_e"><span class="pre">hal_gpio_mode_e</span></a> <code class="sig-name descname"><span class="pre">hal_gpio_mode_t</span></code><a class="headerlink" href="#c.hal_gpio_mode_t" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c type"> |
| <dt id="c.hal_gpio_pull_t"> |
| <span class="target" id="group___h_a_l_gpio_1gaa96291053d9fd1f8890ea1df9de686a3"></span><em class="property"><span class="pre">typedef</span> </em><em class="property"><span class="pre">enum</span></em> <a class="reference internal" href="#c.hal_gpio_pull" title="hal_gpio_pull"><span class="pre">hal_gpio_pull</span></a> <code class="sig-name descname"><span class="pre">hal_gpio_pull_t</span></code><a class="headerlink" href="#c.hal_gpio_pull_t" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c type"> |
| <dt id="c.hal_gpio_irq_trig_t"> |
| <span class="target" id="group___h_a_l_gpio_1ga49380279d2a339d21e9764e705ff6748"></span><em class="property"><span class="pre">typedef</span> </em><em class="property"><span class="pre">enum</span></em> <a class="reference internal" href="#c.hal_gpio_irq_trigger" title="hal_gpio_irq_trigger"><span class="pre">hal_gpio_irq_trigger</span></a> <code class="sig-name descname"><span class="pre">hal_gpio_irq_trig_t</span></code><a class="headerlink" href="#c.hal_gpio_irq_trig_t" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c type"> |
| <dt id="c.hal_gpio_irq_handler_t"> |
| <span class="target" id="group___h_a_l_gpio_1ga4e27cbc81cfeb6d4827f5789bffc1bf2"></span><em class="property"><span class="pre">typedef</span> </em><span class="pre">void</span> <span class="pre">(</span><span class="pre">*</span><code class="sig-name descname"><span class="pre">hal_gpio_irq_handler_t</span></code><span class="pre">)</span><span class="sig-paren">(</span><span class="pre">void</span> <span class="pre">*</span><span class="pre">arg</span><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_irq_handler_t" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_init_in"> |
| <span class="target" id="group___h_a_l_gpio_1ga6f871cb613f87d328f9098484d34982e"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_init_in</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em>, <a class="reference internal" href="#c.hal_gpio_pull_t" title="hal_gpio_pull_t"><span class="pre">hal_gpio_pull_t</span></a> <em><span class="pre">pull</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_init_in" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Initializes the specified pin as an input. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>int 0: no error; -1 otherwise. </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin number to set as input </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pull</span></code>: pull type</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_init_out"> |
| <span class="target" id="group___h_a_l_gpio_1ga7594e2079435ac6f3a6950bcd99b33c7"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_init_out</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em>, <span class="pre">int</span> <em><span class="pre">val</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_init_out" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Initialize the specified pin as an output, setting the pin to the specified value. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>int 0: no error; -1 otherwise. </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin number to set as output </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">val</span></code>: Value to set pin</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_deinit"> |
| <span class="target" id="group___h_a_l_gpio_1ga4fbfb72138789ad6aabea4ad0c572a82"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_deinit</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_deinit" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Deinitialize the specified pin to revert the previous initialization. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>int 0: no error; -1 otherwise. </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin number to unset</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_write"> |
| <span class="target" id="group___h_a_l_gpio_1gaf84a65839b9b04225131714c9bd16049"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">hal_gpio_write</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em>, <span class="pre">int</span> <em><span class="pre">val</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_write" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Write a value (either high or low) to the specified pin. </p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin to set </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">val</span></code>: Value to set pin (0:low 1:high) </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_read"> |
| <span class="target" id="group___h_a_l_gpio_1ga4036d26c86d52e1f2e1e8d058126dae9"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_read</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_read" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Reads the specified pin. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>int 0: low, 1: high </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin number to read</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_toggle"> |
| <span class="target" id="group___h_a_l_gpio_1ga41cb6827b643d7b54da660987b280a85"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_toggle</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_toggle" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Toggles the specified pin. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>current gpio state int 0: low, 1: high </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: Pin number to toggle</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_irq_init"> |
| <span class="target" id="group___h_a_l_gpio_1gaf2d98059c05b0b3867699f83675205fd"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">hal_gpio_irq_init</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em>, <a class="reference internal" href="#c.hal_gpio_irq_handler_t" title="hal_gpio_irq_handler_t"><span class="pre">hal_gpio_irq_handler_t</span></a> <em><span class="pre">handler</span></em>, <span class="pre">void</span> <span class="pre">*</span><em><span class="pre">arg</span></em>, <a class="reference internal" href="#c.hal_gpio_irq_trig_t" title="hal_gpio_irq_trig_t"><span class="pre">hal_gpio_irq_trig_t</span></a> <em><span class="pre">trig</span></em>, <a class="reference internal" href="#c.hal_gpio_pull_t" title="hal_gpio_pull_t"><span class="pre">hal_gpio_pull_t</span></a> <em><span class="pre">pull</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_irq_init" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Initialize a given pin to trigger a GPIO IRQ callback. </p> |
| <p><dl class="simple"> |
| <dt><strong>Return</strong></dt><dd><p>0 on success, non-zero error code on failure. </p> |
| </dd> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: The pin to trigger GPIO interrupt on </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">handler</span></code>: The handler function to call </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">arg</span></code>: The argument to provide to the IRQ handler </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">trig</span></code>: The trigger mode (e.g. rising, falling) </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pull</span></code>: The mode of the pin (e.g. pullup, pulldown)</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_irq_release"> |
| <span class="target" id="group___h_a_l_gpio_1ga233f5726dc049c11c02a7ea6e17bbe5c"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">hal_gpio_irq_release</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_irq_release" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Release a pin from being configured to trigger IRQ on state change. </p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: The pin to release </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_irq_enable"> |
| <span class="target" id="group___h_a_l_gpio_1gaf5a12227e02c35222b5c00b84bdf11a0"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">hal_gpio_irq_enable</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_irq_enable" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Enable IRQs on the passed pin. </p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: The pin to enable IRQs on </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.hal_gpio_irq_disable"> |
| <span class="target" id="group___h_a_l_gpio_1ga7762336b37c8f239085952ece2eb2941"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">hal_gpio_irq_disable</span></code><span class="sig-paren">(</span><span class="pre">int</span> <em><span class="pre">pin</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.hal_gpio_irq_disable" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Disable IRQs on the passed pin. </p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">pin</span></code>: The pin to disable IRQs on </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
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