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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;"> RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 200</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">U</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // Timeout window in ms in which the double tap can occur.</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">#define</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> GP17</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // Specify a optional status led by GPIO number which blinks when entering the bootloader</span></span></code></pre></div><h2 id="pre-defined-rp2040-boards" tabindex="-1">Pre-defined RP2040 boards <a class="header-anchor" href="#pre-defined-rp2040-boards" aria-label="Permalink to &quot;Pre-defined RP2040 boards&quot;"></a></h2><p>QMK defines two boards that you can choose from to base your RP2040 powered keyboard upon. These boards provide pre-configured default pins and drivers.</p><h3 id="generic-pro-micro-rp2040" tabindex="-1">Generic Pro Micro RP2040 <a class="header-anchor" href="#generic-pro-micro-rp2040" aria-label="Permalink to &quot;Generic Pro Micro RP2040&quot;"></a></h3><p>This is the default board that is chosen, unless any other RP2040 board is selected in your keyboards <code>rules.mk</code> file. It assumes a pin layout for the I2C, SPI and Serial drivers which is identical to the Sparkfun Pro Micro RP2040, however all values can be overwritten by defining them in your keyboards <code>config.h</code> file. The <a href="#double-tap">double-tap</a> reset to enter boot-loader behavior is activated by default.</p><table><thead><tr><th>Driver configuration define</th><th>Value</th></tr></thead><tbody><tr><td><strong>I2C driver</strong></td><td></td></tr><tr><td><code>I2C_DRIVER</code></td><td><code>I2CD1</code></td></tr><tr><td><code>I2C1_SDA_PIN</code></td><td><code>GP2</code></td></tr><tr><td><code>I2C1_SCL_PIN</code></td><td><code>GP3</code></td></tr><tr><td><strong>SPI driver</strong></td><td></td></tr><tr><td><code>SPI_DRIVER</code></td><td><code>SPID0</code></td></tr><tr><td><code>SPI_SCK_PIN</code></td><td><code>GP18</code></td></tr><tr><td><code>SPI_MISO_PIN</code></td><td><code>GP20</code></td></tr><tr><td><code>SPI_MOSI_PIN</code></td><td><code>GP19</code></td></tr><tr><td><strong>Serial driver</strong></td><td></td></tr><tr><td><code>SERIAL_USART_DRIVER</code> (<a href="./drivers/serial#the-sio-driver">SIO Driver</a> only)</td><td><code>SIOD0</code></td></tr><tr><td><code>SOFT_SERIAL_PIN</code></td><td>undefined, use <code>SERIAL_USART_TX_PIN</code></td></tr><tr><td><code>SERIAL_USART_TX_PIN</code></td><td><code>GP0</code></td></tr><tr><td><code>SERIAL_USART_RX_PIN</code></td><td><code>GP1</code></td></tr><tr><td><strong>UART driver</strong></td><td></td></tr><tr><td><code>UART_DRIVER</code></td><td><code>SIOD0</code></td></tr><tr><td><code>UART_TX_PIN</code></td><td><code>GP0</code></td></tr><tr><td><code>UART_RX_PIN</code></td><td><code>GP1</code></td></tr></tbody></table><div class="tip custom-block"><p class="custom-block-title">TIP</p><p>The pin-outs of Adafruit&#39;s KB2040 and Boardsource&#39;s Blok both deviate from the Sparkfun Pro Micro RP2040. Lookup the pin-out of these boards and adjust your keyboards pin definition accordingly if you want to use these boards.</p></div><h3 id="generic-rp2040-board" tabindex="-1">Generic RP2040 board <a class="header-anchor" href="#generic-rp2040-board" aria-label="Permalink to &quot;Generic RP2040 board&quot;"></a></h3><p>This board can be chosen as a base for RP2040 keyboards which configure all necessary pins and drivers themselves and do not wish to leverage the configuration matching the Generic Pro Micro RP2040 board. Thus it doesn&#39;t provide any pre-configured pins or drivers. To select this board add the following line to your keyboards <code>rules.mk</code> file.</p><div class="language-make vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">make</span><pre class="shiki shiki-themes github-light github-dark vp-code"><code><span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">BOARD = GENERIC_RP_RP2040</span></span></code></pre></div><h2 id="split-keyboard-sup
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