diff --git a/Src/#stm32f0xx_hal_msp.c# b/Src/#stm32f0xx_hal_msp.c#
new file mode 100644
index 0000000..91938df
--- /dev/null
+++ b/Src/#stm32f0xx_hal_msp.c#
@@ -0,0 +1,117 @@
+/**
+  ******************************************************************************
+  * File Name          : stm32f0xx_hal_msp.c
+  * Date               : 05/12/2014 20:22:27
+  * Description        : This file provides code for the MSP Initialization
+  *                      and de-Initialization codes.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2014 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f0xx_hal.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/**
+  * Initializes the Global MSP.
+  */
+void HAL_MspInit(void)
+{
+  /* USER CODE BEGIN MspInit 0 */
+
+  /* USER CODE END MspInit 0 */
+
+  /* System interrupt init*/
+/* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+
+  /* USER CODE BEGIN MspInit 1 */
+
+  /* USER CODE END MspInit 1 */
+}
+
+void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+  if(hcan->Instance==CAN)
+  {
+  /* USER CODE BEGIN CAN_MspInit 0 */
+
+  /* USER CODE END CAN_MspInit 0 */
+    /* Peripheral clock enable */
+    __CAN_CLK_ENABLE();
+
+    /**CAN GPIO Configuration
+    PB8     ------> CAN_RX
+    PB9     ------> CAN_TX
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+    GPIO_InitStruct.Alternate = GPIO_AF4_CAN;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+  /* USER CODE BEGIN CAN_MspInit 1 */
+
+  /* USER CODE END CAN_MspInit 1 */
+  }
+
+}
+
+void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan)
+{
+
+  if(hcan->Instance==CAN)
+  {
+  /* USER CODE BEGIN CAN_MspDeInit 0 */
+
+  /* USER CODE END CAN_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __CAN_CLK_DISABLE();
+
+    /**CAN GPIO Configuration
+    PB8     ------> CAN_RX
+    PB9     ------> CAN_TX
+    */
+    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_8|GPIO_PIN_9);
+
+  /* USER CODE BEGIN CAN_MspDeInit 1 */
+
+  /* USER CODE END CAN_MspDeInit 1 */
+  }
+
+}
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/Src/.#stm32f0xx_hal_msp.c b/Src/.#stm32f0xx_hal_msp.c
new file mode 120000
index 0000000..63e9ec0
--- /dev/null
+++ b/Src/.#stm32f0xx_hal_msp.c
@@ -0,0 +1 @@
+eric@Erics-MBP-2.lan.380
\ No newline at end of file
diff --git a/Src/can.c b/Src/can.c
index 1af981d..d26879e 100644
--- a/Src/can.c
+++ b/Src/can.c
@@ -39,39 +39,40 @@ void can_init(void) {
 void can_enable(void) {
     uint32_t status;
     if (bus_state == OFF_BUS) {
-        hcan.Init.Mode = CAN_MODE_NORMAL;
-        hcan.pTxMsg = NULL;
-        status = HAL_CAN_Init(&hcan);
-        status = HAL_CAN_ConfigFilter(&hcan, &filter);
-        bus_state = ON_BUS;
+	hcan.Init.Mode = CAN_MODE_NORMAL;
+	hcan.pTxMsg = NULL;
+	status = HAL_CAN_Init(&hcan);
+	status = HAL_CAN_ConfigFilter(&hcan, &filter);
+	bus_state = ON_BUS;
     }
 }
 
 void can_disable(void) {
     uint32_t status;
     if (bus_state == ON_BUS) {
-        // do a bxCAN reset (set RESET bit to 1)
-        hcan.Instance->MCR |= CAN_MCR_RESET;
-        bus_state = OFF_BUS;
+	// do a bxCAN reset (set RESET bit to 1)
+	hcan.Instance->MCR |= CAN_MCR_RESET;
+	bus_state = OFF_BUS;
     }
+    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
 }
 
 void can_set_bitrate(enum can_bitrate bitrate) {
     if (bus_state == ON_BUS) {
-        // cannot set bitrate while on bus
-        return;
+	// cannot set bitrate while on bus
+	return;
     }
 
     switch (bitrate) {
-        case CAN_BITRATE_500K:
-            hcan.Init.Prescaler = 12;
-            break;
-        case CAN_BITRATE_250K:
-            hcan.Init.Prescaler = 24;
-            break;
-        case CAN_BITRATE_125K:
-            hcan.Init.Prescaler = 48;
-            break;
+	case CAN_BITRATE_500K:
+	    hcan.Init.Prescaler = 12;
+	    break;
+	case CAN_BITRATE_250K:
+	    hcan.Init.Prescaler = 24;
+	    break;
+	case CAN_BITRATE_125K:
+	    hcan.Init.Prescaler = 48;
+	    break;
     }
 }
 
@@ -82,6 +83,7 @@ uint32_t can_tx(CanTxMsgTypeDef *tx_msg, uint32_t timeout) {
     hcan.pTxMsg = tx_msg;
     status = HAL_CAN_Transmit(&hcan, timeout);
 
+    HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
     return status;
 }
 
@@ -92,12 +94,13 @@ uint32_t can_rx(CanRxMsgTypeDef *rx_msg, uint32_t timeout) {
 
     status = HAL_CAN_Receive(&hcan, CAN_FIFO0, timeout);
 
+    HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
     return status;
 }
 
 uint8_t is_can_msg_pending(uint8_t fifo) {
     if (bus_state == OFF_BUS) {
-        return 0;
+	return 0;
     }
     return (__HAL_CAN_MSG_PENDING(&hcan, fifo) > 0);
 }
diff --git a/Src/main.c b/Src/main.c
index 277d713..45de8a3 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -52,6 +52,7 @@
 /* Private function prototypes -----------------------------------------------*/
 void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
+static void led_init(void);
 
 /* USER CODE BEGIN PFP */
 
@@ -80,21 +81,28 @@ int main(void)
     /* Initialize all configured peripherals */
     MX_GPIO_Init();
     can_init();
+    led_init();
     MX_USB_DEVICE_Init();
 
     /* USER CODE END 2 */
 
     /* USER CODE BEGIN 3 */
 
-    uint32_t count;
 
-    // start up delay to allow USB to initialize?
-    for(count=0; count<32000000; count++);
+    // turn on green LED
+    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);
+
+    // blink red LED for test
+    uint32_t count;
+    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
+    for (count=0; count < 200000; count++) { __asm("nop");}
+    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
 
     // loop forever
     CanRxMsgTypeDef rx_msg;
     uint32_t status;
     uint8_t msg_buf[SLCAN_MTU];
+
     for (;;) {
 	while (!is_can_msg_pending());
 	status = can_rx(&rx_msg, 3);
@@ -102,11 +110,6 @@ int main(void)
 	    status = slcan_parse_frame(&msg_buf, &rx_msg);
 	    CDC_Transmit_FS(msg_buf, status);
 	}
-
-	#if 0
-	for(count=0; count < 16000000; count++);
-	CDC_Transmit_FS(str, sizeof(str));
-	#endif
     }
 
     /* USER CODE END 3 */
@@ -166,7 +169,15 @@ void MX_GPIO_Init(void)
 }
 
 /* USER CODE BEGIN 4 */
-
+static void led_init() {
+    GPIO_InitTypeDef GPIO_InitStruct;
+    GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
+    GPIO_InitStruct.Alternate = 0;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+}
 /* USER CODE END 4 */
 
 #ifdef USE_FULL_ASSERT
diff --git a/Src/stm32f0xx_hal_msp.c b/Src/stm32f0xx_hal_msp.c
index 0ab31d2..db1355d 100644
--- a/Src/stm32f0xx_hal_msp.c
+++ b/Src/stm32f0xx_hal_msp.c
@@ -81,6 +81,12 @@ void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
   /* USER CODE BEGIN CAN_MspInit 1 */
+    GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
+    GPIO_InitStruct.Alternate = 0;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
   /* USER CODE END CAN_MspInit 1 */
   }