60;<span class="preprocessor">#define GPIO_PIN_REG_2          PERIPHS_IO_MUX_GPIO2_U</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="preprocessor">#define GPIO_PIN_REG_3          PERIPHS_IO_MUX_U0RXD_U</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="preprocessor">#define GPIO_PIN_REG_4          PERIPHS_IO_MUX_GPIO4_U</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</s