diff --git a/Makefile b/Makefile
index 4318bd9..9aa6ea6 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,10 @@ CFLAGS += -Wpointer-arith -Wswitch
 CFLAGS += -Wredundant-decls -Wreturn-type -Wshadow -Wunused
 CFLAGS += -Wa,-adhlns=$(BUILDDIR)/$(subst $(suffix $<),.lst,$<)
 CFLAGS += $(patsubst %,-I%,$(INCDIRS))
+ifndef PLATFORM
+PLATFORM = MAPLE
+endif
+CFLAGS += -D$(PLATFORM)
 
 # Aeembler Flags
 ASFLAGS = -Wa,-adhlns=$(BUILDDIR)/$(<:.s=.lst)#,--g$(DEBUG)
diff --git a/config.h b/config.h
index def4f99..f86968b 100644
--- a/config.h
+++ b/config.h
@@ -33,16 +33,41 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#include "common.h"
+#ifdef MAPLE
+
+# define LED_BANK GPIOA
+# define LED_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOA
+# define LED      5
+
+# define BUTTON_BANK GPIOC
+# define BUTTON_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOC
+# define BUTTON      9
+
+# define USB_DISC_BANK GPIOC
+# define USB_DISC_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOC
+# define USB_DISC      12
+
+#elif defined MAPLE_MINI
+
+# define LED_BANK GPIOB
+# define LED_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOB
+# define LED      1
+
+# define BUTTON_BANK GPIOB
+# define BUTTON_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOB
+# define BUTTON      8
+
+# define USB_DISC_BANK GPIOB
+# define USB_DISC_RCC_APB2ENR_GPIO RCC_APB2ENR_GPIOB
+# define USB_DISC      9
+
+#else
+# error "Unknown platform"
+#endif
 
-#define LED_BANK GPIOA
-#define LED      5
 #define BLINK_FAST 0x50000
 #define BLINK_SLOW 0x100000
 
-#define BUTTON_BANK GPIOC
-#define BUTTON      9
-
 #define STARTUP_BLINKS 5
 #define BOOTLOADER_WAIT 6
 
diff --git a/hardware.c b/hardware.c
index d3d985e..7b55b16 100644
--- a/hardware.c
+++ b/hardware.c
@@ -38,8 +38,8 @@ void setPin(u32 bank, u8 pin) {
 }
 
 void resetPin(u32 bank, u8 pin) {
-    u32 pinMask = 0x1 << (16 + pin);
-    SET_REG(GPIO_BSRR(bank), pinMask);
+    u32 pinMask = 0x1 << (pin);
+    SET_REG(GPIO_BRR(bank), pinMask);
 }
 
 bool readPin(u32 bank, u8 pin) {
@@ -96,40 +96,51 @@ void setupCLK(void) {
 }
 
 void setupLED(void) {
-    // todo, swap out hardcoded pin/bank with macro
     u32 rwmVal; /* read-write-modify place holder var */
 
-    /* Setup APB2 (GPIOA) */
+    /* Setup APB2 for LED GPIO bank */
     rwmVal =  GET_REG(RCC_APB2ENR);
-    rwmVal |= 0x00000004;
+    rwmVal |= LED_RCC_APB2ENR_GPIO;
     SET_REG(RCC_APB2ENR, rwmVal);
 
-    /* Setup GPIOA Pin 5 as PP Out */
-    SET_REG(GPIO_CRL(GPIOA), 0x00100000);
-
-    rwmVal =  GET_REG(GPIO_CRL(GPIOA));
-    rwmVal &= 0xFF0FFFFF;
-    rwmVal |= 0x00100000;
-    SET_REG(GPIO_CRL(GPIOA), rwmVal);
-
-    setPin(GPIOA, 5);
+#if (LED < 8)
+# define LED_GPIO_CR GPIO_CRL(LED_BANK)
+# define LED_CR_PORT (LED)
+#else
+# define LED_GPIO_CR GPIO_CRH(LED_BANK)
+# define LED_CR_PORT (LED - 8)
+#endif
+
+    /* Setup GPIO Pin as PP Out */
+    rwmVal =  GET_REG(LED_GPIO_CR);
+    rwmVal &= ~(0xF << (LED_CR_PORT * 4));
+    rwmVal |= (0x1 << (LED_CR_PORT * 4));
+    SET_REG(LED_GPIO_CR, rwmVal);
+
+    setPin(LED_BANK, LED);
 }
 
 void setupBUTTON(void) {
-    // todo, swap out hardcoded pin/bank with macro
     u32 rwmVal; /* read-write-modify place holder var */
 
-    /* Setup APB2 (GPIOC) */
+    /* Setup APB2 for button GPIO bank */
     rwmVal =  GET_REG(RCC_APB2ENR);
-    rwmVal |= 0x00000010;
+    rwmVal |= BUTTON_RCC_APB2ENR_GPIO;
     SET_REG(RCC_APB2ENR, rwmVal);
 
-    /* Setup GPIOC Pin 9 as PP Out */
-    rwmVal =  GET_REG(GPIO_CRH(GPIOC));
-    rwmVal &= 0xFFFFFF0F;
-    rwmVal |= 0x00000040;
-    SET_REG(GPIO_CRH(GPIOC), rwmVal);
-
+#if (BUTTON < 8)
+# define BUTTON_GPIO_CR GPIO_CRL(BUTTON_BANK)
+# define BUTTON_CR_PORT (BUTTON)
+#else
+# define BUTTON_GPIO_CR GPIO_CRH(BUTTON_BANK)
+# define BUTTON_CR_PORT (BUTTON - 8)
+#endif
+
+    /* Setup button GPIO Pin as input */
+    rwmVal =  GET_REG(BUTTON_GPIO_CR);
+    rwmVal &= ~(0xF << (BUTTON_CR_PORT * 4));
+    rwmVal |= (0x4 << (BUTTON_CR_PORT * 4));
+    SET_REG(BUTTON_GPIO_CR, rwmVal);
 }
 
 void setupFLASH() {
@@ -166,7 +177,7 @@ void jumpToUser(u32 usrAddr) {
     flashLock();
     usbDsbISR();
     nvicDisableInterrupts();
-    setPin(GPIOC, 12); // disconnect usb from host. todo, macroize pin
+    setPin(USB_DISC_BANK, USB_DISC); // disconnect usb from host
     systemReset(); // resets clocks and periphs, not core regs
 
 
diff --git a/hardware.h b/hardware.h
index 70f06c7..2ec8329 100644
--- a/hardware.h
+++ b/hardware.h
@@ -33,6 +33,7 @@
 #define RCC   ((u32)0x40021000)
 #define FLASH ((u32)0x40022000)
 #define GPIOA ((u32)0x40010800)
+#define GPIOB ((u32)0x40010C00)
 #define GPIOC ((u32)0x40011000)
 
 #define RCC_CR      RCC
@@ -41,6 +42,10 @@
 #define RCC_AHBENR  (RCC + 0x14)
 #define RCC_APB2ENR (RCC + 0x18)
 #define RCC_APB1ENR (RCC + 0x1C)
+#define RCC_APB2ENR_GPIOA 0x00000004
+#define RCC_APB2ENR_GPIOB 0x00000008
+#define RCC_APB2ENR_GPIOC 0x00000010
+#define RCC_APB1ENR_USB 0x00800000
 
 #define FLASH_ACR     (FLASH + 0x00)
 #define FLASH_KEYR    (FLASH + 0x04)
@@ -64,6 +69,7 @@
 #define GPIO_IDR(port)  (port+0x08)
 #define GPIO_ODR(port)  (port+0x0c)
 #define GPIO_BSRR(port) (port+0x10)
+#define GPIO_BRR(port)  (port+0x14)
 
 #define SCS_BASE   ((u32)0xE000E000)
 #define NVIC_BASE  (SCS_BASE + 0x0100)
diff --git a/usb.c b/usb.c
index b6d2a67..57db187 100644
--- a/usb.c
+++ b/usb.c
@@ -36,25 +36,34 @@
 void setupUSB(void) {
     u32 rwmVal; /* read-write-modify place holder var */
 
-    /* Setup the USB DISC Pin */
+    /* Setup APB2 for USB disconnect GPIO bank */
     rwmVal  = GET_REG(RCC_APB2ENR);
-    rwmVal |= 0x00000010;
+    rwmVal |= USB_DISC_RCC_APB2ENR_GPIO;
     SET_REG(RCC_APB2ENR, rwmVal);
 
-    // todo, macroize usb_disc pin
-    /* Setup GPIOC Pin 12 as OD out */
-    rwmVal  = GET_REG(GPIO_CRH(GPIOC));
-    rwmVal &= 0xFFF0FFFF;
-    rwmVal |= 0x00050000;
-    setPin(GPIOC, 12);
-    SET_REG(GPIO_CRH(GPIOC), rwmVal);
+#if (USB_DISC < 8)
+# define USB_DISC_GPIO_CR GPIO_CRL(USB_DISC_BANK)
+# define USB_DISC_CR_PORT (USB_DISC)
+#else
+# define USB_DISC_GPIO_CR GPIO_CRH(USB_DISC_BANK)
+# define USB_DISC_CR_PORT (USB_DISC - 8)
+#endif
+
+    /* preset pin to high */
+    setPin(USB_DISC_BANK, USB_DISC);
 
-    pRCC->APB1ENR |= 0x00800000;
+    /* Setup GPIO Pin as OD out */
+    rwmVal  = GET_REG(USB_DISC_GPIO_CR);
+    rwmVal &= ~(0xF << (USB_DISC_CR_PORT * 4));
+    rwmVal |= (0x5 << (USB_DISC_CR_PORT * 4));
+    SET_REG(USB_DISC_GPIO_CR, rwmVal);
+
+    /* enable USB clock */
+    pRCC->APB1ENR |= RCC_APB1ENR_USB;
 
     /* initialize the usb application */
-    resetPin(GPIOC, 12);  /* present ourselves to the host */
+    resetPin(USB_DISC_BANK, USB_DISC);  /* present ourselves to the host */
     usbAppInit();
-
 }
 
 vu32 bDeviceState = UNCONNECTED;