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<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">#define</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> JOYSTICK_BUTTON_COUNT</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 16</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Min 0, max 6: X, Y, Z, Rx, Ry, Rz</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">#define</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> JOYSTICK_AXIS_COUNT</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 3</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Min 8, max 16</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">#define</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> JOYSTICK_AXIS_RESOLUTION</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 10</span></span></code></pre></div><div class="tip custom-block"><p class="custom-block-title">TIP</p><p>You must define at least one button or axis. Also note that the maximum ADC resolution of the supported AVR MCUs is 10-bit, and 12-bit for most STM32 MCUs.</p></div><h3 id="axes" tabindex="-1">Axes <a class="header-anchor" href="#axes" aria-label="Permalink to &quot;Axes {#axes}&quot;"></a></h3><p>When defining axes for your joystick, you must provide a definition array typically in your <code>keymap.c</code>.</p><p>For instance, the below example configures two axes. The X axis is read from the <code>A4</code> pin. With the default axis resolution of 8 bits, the range of values between 900 and 575 are scaled to -127 through 0, and values 575 to 285 are scaled to 0 through 127. The Y axis is configured as a virtual axis, and its value is not read from any pin. Instead, the user must update the axis value programmatically.</p><div class="language-c vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">c</span><pre class="shiki shiki-themes github-light github-dark vp-code"><code><span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">joystick_config_t</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> joystick_axes</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[JOYSTICK_AXIS_COUNT] </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> JOYSTICK_AXIS_IN</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(A4, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">900</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">575</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">285</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> JOYSTICK_AXIS_VIRTUAL</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">};</span></span></code></pre></div><p>Axes can be configured using one of the following macros:</p><ul><li><code>JOYSTICK_AXIS_IN(input_pin, low, rest, high)</code><br> The ADC samples the provided pin. <code>low</code>, <code>high</code> and <code>rest</code> correspond to the minimum, maximum, and resting (or centered) analog values of the axis, respectively.</li><li><code>JOYSTICK_AXIS_VIRTUAL</code><br> No ADC reading is performed. The value should be provided by user code.</li></ul><p>The <code>low</code> and <code>high</code> values can be swapped to effectively invert the axis.</p><h4 id="virtual-axes" tabindex="-1">Virtual Axes <a class="header-anchor" href="#virtual-axes" aria-label="Permalink to &quot;Virtual Axes {#virtual-axes}&quot;"></a></h4><p>The following example adjusts two virtual axes (X and Y) based on keypad presses, with <code>KC_P0</code> as a precision modifier:</p><div class="language-c vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">c</span><pre class="shiki shiki-themes github-light github-dark vp-code"><code><span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">joystick_config_t</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> joystick_axes</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[JOYSTICK_AXIS_COUNT] </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> JOYSTICK_AXIS_VIRTUAL,</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // x</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> JOYSTICK_AXIS_VIRTUAL</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // y</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">};</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">static</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> bool</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">static</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> uint16_t</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_mod </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 64</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">static</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> uint16_t</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> axis_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 127</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">bool</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> process_record_user</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">uint16_t</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> keycode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">keyrecord_t</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> *</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> int16_t</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> axis_val;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (precision) {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_mod;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> switch</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (keycode) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> case</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> KC_P8:</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> joystick_set_axis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, record</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">event.pressed </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> case</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> KC_P2:</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> joystick_set_axis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, record</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">event.pressed </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> case</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> KC_P4:</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> joystick_set_axis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, record</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">event.pressed </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> case</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> KC_P6:</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> joystick_set_axis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, record</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">event.pressed </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision_val </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> case</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> KC_P0:</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> precision </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> record-&gt;event.pressed;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> true</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h2 id="keycodes" tabindex="-1">Keycodes <a class="header-anchor" href="#keycodes" aria-label="Permalink to &quot;Keycodes {#keycodes}&quot;"></a></h2><table><thead><tr><th>Key</th><th>Aliases</th><th>Description</th></tr></thead><tbody><tr><td><code>QK_JOYSTICK_BUTTON_0</code></td><td><code>JS_0</code></td><td>Button 0</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_1</code></td><td><code>JS_1</code></td><td>Button 1</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_2</code></td><td><code>JS_2</code></td><td>Button 2</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_3</code></td><td><code>JS_3</code></td><td>Button 3</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_4</code></td><td><code>JS_4</code></td><td>Button 4</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_5</code></td><td><code>JS_5</code></td><td>Button 5</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_6</code></td><td><code>JS_6</code></td><td>Button 6</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_7</code></td><td><code>JS_7</code></td><td>Button 7</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_8</code></td><td><code>JS_8</code></td><td>Button 8</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_9</code></td><td><code>JS_9</code></td><td>Button 9</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_10</code></td><td><code>JS_10</code></td><td>Button 10</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_11</code></td><td><code>JS_11</code></td><td>Button 11</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_12</code></td><td><code>JS_12</code></td><td>Button 12</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_13</code></td><td><code>JS_13</code></td><td>Button 13</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_14</code></td><td><code>JS_14</code></td><td>Button 14</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_15</code></td><td><code>JS_15</code></td><td>Button 15</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_16</code></td><td><code>JS_16</code></td><td>Button 16</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_17</code></td><td><code>JS_17</code></td><td>Button 17</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_18</code></td><td><code>JS_18</code></td><td>Button 18</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_19</code></td><td><code>JS_19</code></td><td>Button 19</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_20</code></td><td><code>JS_20</code></td><td>Button 20</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_21</code></td><td><code>JS_21</code></td><td>Button 21</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_22</code></td><td><code>JS_22</code></td><td>Button 22</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_23</code></td><td><code>JS_23</code></td><td>Button 23</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_24</code></td><td><code>JS_24</code></td><td>Button 24</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_25</code></td><td><code>JS_25</code></td><td>Button 25</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_26</code></td><td><code>JS_26</code></td><td>Button 26</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_27</code></td><td><code>JS_27</code></td><td>Button 27</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_28</code></td><td><code>JS_28</code></td><td>Button 28</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_29</code></td><td><code>JS_29</code></td><td>Button 29</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_30</code></td><td><code>JS_30</code></td><td>Button 30</td></tr><tr><td><code>QK_JOYSTICK_BUTTON_31</code></td><td><code>JS_31</code></td><td>Button 31</td></tr></tbody></table><h2 id="api" tabindex="-1">API <a class="header-anchor" href="#api" aria-label="Permalink to &quot;API {#api}&quot;"></a></h2><h3 id="api-joystick-t" tabindex="-1"><code>struct joystick_t</code> <a class="header-anchor" href="#api-joystick-t" aria-label="Permalink to &quot;`struct joystick_t` {#api-joystick-t}&quot;"></a></h3><p>Contains the state of the joystick.</p><h4 id="api-joystick-t-members" tabindex="-1">Members <a class="header-anchor" href="#api-joystick-t-members" aria-label="Permalink to &quot;Members {#api-joystick-t-members}&quot;"></a></h4><ul><li><code>uint8_t buttons[]</code><br> A bit-packed array containing the joystic
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