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<spanclass="line"><spanstyle="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // do things with registers</span></span>
<spanclass="line"><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h2id="early-hardware-init-post"tabindex="-1"><code>early_hardware_init_post()</code><aclass="header-anchor"href="#early-hardware-init-post"aria-label="Permalink to "`early_hardware_init_post()` {#early-hardware-init-post}""></a></h2><p>The function <code>early_hardware_init_post</code> is the next earliest possible code that can be executed by a keyboard firmware. This is executed after RAM has been cleared, and clocks and GPIOs are configured. This is intended as a replacement for the ChibiOS board definition's <code>__early_init</code> function, and is the equivalent of executing at the end of the function.</p><p>Much like <code>early_hardware_init_pre</code>, ChibiOS has not yet been initialized either, so the same restrictions on delays and timing apply.</p><p>If you wish to override this API, consider limiting functionality to register writes, variable initialization, and GPIO toggling. The default implementation of this function is to do nothing.</p><p>To implement your own version of this function, in your keyboard's source files:</p><divclass="language-c vp-adaptive-theme"><buttontitle="Copy Code"class="copy"></button><spanclass="lang">c</span><preclass="shiki shiki-themes github-light github-dark vp-code"><code><spanclass="line"><spanstyle="--shiki-light:#D73A49;--shiki-dark:#F97583;">void</span><spanstyle="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> early_hardware_init_post</span><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><spanstyle="--shiki-light:#D73A49;--shiki-dark:#F97583;">void</span><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<spanclass="line"><spanstyle="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // toggle GPIO pins and write to variables</span></span>
<spanclass="line"><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h2id="board-init"tabindex="-1"><code>board_init()</code><aclass="header-anchor"href="#board-init"aria-label="Permalink to "`board_init()` {#board-init}""></a></h2><p>The function <code>board_init</code> is executed directly after the ChibiOS initialization routines have completed. At this stage, all normal low-level functionality should be available for use (including timers and delays), with the restriction that USB is not yet connected. This is intended as a replacement for the ChibiOS board definition's <code>boardInit</code> function.</p><p>The default implementation of this function is to do nothing.</p><p>To implement your own version of this function, in your keyboard's source files:</p><divclass="language-c vp-adaptive-theme"><buttontitle="Copy Code"class="copy"></button><spanclass="lang">c</span><preclass="shiki shiki-themes github-light github-dark vp-code"><code><spanclass="line"><spanstyle="--shiki-light:#D73A49;--shiki-dark:#F97583;">void</span><spanstyle="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> board_init</span><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><spanstyle="--shiki-light:#D73A49;--shiki-dark:#F97583;">void</span><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<spanclass="line"><spanstyle="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // initialize anything that requires ChibiOS</span></span>
<spanclass="line"><spanstyle="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div></div></div></main><footerclass="VPDocFooter"data-v-39a288b8data-v-09de1c0f><!--[--><!--]--><!----><navclass="prev-next"data-v-09de1c0f><divclass="pager"data-v-09de1c0f><aclass="VPLink link pager-link prev"href="/platformdev_selecting_arm_mcu"data-v-09de1c0f><!--[--><spanclass="desc"data-v-09de1c0f>Previous page</span><spanclass="title"data-v-09de1c0f>Selecting an MCU</span><!--]--></a></div><divclass="pager"data-v-09de1c0f><aclass="VPLink link pager-link next"href="/platformdev_rp2040"data-v-09de1c0f><!--[--><spanclass="desc"data-v-09de1c0f>Next page</span><spanclass="title"data-v-09de1c0f>Raspberry Pi RP2040</span><!--]--></a></div></nav></footer><!--[--><!--]--></div></div></div><!--[--><!--]--></div></div><!----><!--[--><!--]--></div></div>
