+/** Number of useable GPIO pins **/
+#define GPIO_NUM_PINS 50
+
+/* Luts */
+#define GPIO_LUT_SIZE 93
+#define GPIO_INDEX_SIZE 128
+extern const unsigned char g_pin_to_gpio[GPIO_LUT_SIZE];
+extern const unsigned char g_gpio_to_index[GPIO_INDEX_SIZE];
+extern const unsigned char g_index_to_gpio[GPIO_NUM_PINS];