[STM32 BSP]CAN driver for stm32f4xx HAL.

Change-Id: I60868dea91e0a632de469e4841410d4f1ae21516

bsp/stm32f4xx-HAL/Kconfig

@@ -308,7 +308,17 @@ config RT_USING_UART2
 config RT_USING_UART6
     bool "Using UART6"
     default n   
-	
+
+if RT_USING_CAN
+config USING_BXCAN1
+    bool "Enable CAN1 RX:PD0 TX:PD1. Do not select HDR."
+    default n
+
+config USING_BXCAN2
+    bool "Enable CAN2 RX:PB12 TX:PB6. Do not select HDR."
+    default n
+endif
+
 if RT_USING_SPI
 
 config RT_USING_SPI1

bsp/stm32f4xx-HAL/drivers/SConscript

@@ -35,7 +35,10 @@ if GetDepend(['RT_USING_USB_HOST']):
     src += ['drv_usbh.c']
 
 if GetDepend(['RT_USING_I2C']):
-	src += ['drv_i2c.c']
+    src += ['drv_i2c.c']
+
+if GetDepend(['RT_USING_CAN']):
+    src += ['drv_can.c']
 
 if GetDepend(['RT_USING_PWM']):
     src += ['drv_pwm.c']

bsp/stm32f4xx-HAL/drivers/drv_can.h

@@ -0,0 +1,23 @@
+/*
+ * File      : drv_can.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2018, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-08-05     Xeon Xu      the first version
+ */
+#ifndef __CAN_H__
+#define __CAN_H__
+#ifdef __cplusplus
+ extern "C" {
+#endif
+extern int hw_can_init(void);
+#ifdef __cplusplus
+ }
+#endif
+#endif /*__CAN_H__ */

bsp/stm32f4xx-HAL/drivers/stm32f4xx_hal_conf.h

@@ -52,7 +52,9 @@ extern "C" {
   */
 #define HAL_MODULE_ENABLED
 /* #define HAL_ADC_MODULE_ENABLED      */
-/* #define HAL_CAN_MODULE_ENABLED      */
+#ifdef RT_USING_CAN
+#define HAL_CAN_MODULE_ENABLED
+#endif
 /* #define HAL_CRC_MODULE_ENABLED      */
 /* #define HAL_CRYP_MODULE_ENABLED     */
 /* #define HAL_DAC_MODULE_ENABLED      */