older version for rasplex, hope it works.

server/drivers/hd44780-rpi.h

@@ -20,10 +20,9 @@ struct rpi_gpio_map {
 };
 
 /** Peripheral base address of the BCM2835 */
-#define BCM2835_PERI_BASE_PI12       0x20000000
-#define BCM2835_PERI_BASE_PI3        0x3F000000
-/** GPIO register start address offset from PERI_BASE */
-#define GPIO_BASE_OFFSET               0x200000
+#define BCM2835_PERI_BASE       0x20000000
+/** GPIO register start address */
+#define GPIO_BASE               BCM2835_PERI_BASE + 0x200000
 /** Length of register space */
 #define GPIO_BLOCK_SIZE         180
 /** The Pi has 32 GPIO pins */