[bsp][ch32v307] 添加can驱动 (#6484)

CH32V307 添加can驱动。
CAN1和CAN2均可以使用，而且调整好波特率

bsp/wch/risc-v/Libraries/ch32_drivers/SConscript

@@ -26,6 +26,9 @@ if  GetDepend('SOC_RISCV_FAMILY_CH32'):
 
     if GetDepend('BSP_USING_IWDT'):
         src += ['drv_iwdt.c']
+        
+    if GetDepend('BSP_USING_CAN'):
+        src += ['drv_can.c']	
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)
 

bsp/wch/risc-v/Libraries/ch32_drivers/drv_can.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-06-21     chenbin      the first version
+ */
+
+#ifndef __DRV_CAN_H__
+#define __DRV_CAN_H__
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+int rt_hw_can_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__DRV_CAN_H__ */
+
+/************************** end of file ******************/

bsp/wch/risc-v/ch32v307v-r1/board/Kconfig

@@ -152,7 +152,20 @@ menu "On-chip Peripheral Drivers"
         select RT_USING_WDT
         select LSI_VALUE
         default n
-
+		
+	menuconfig BSP_USING_CAN
+            bool "Enable CAN"
+            default n
+            select RT_USING_CAN
+            if BSP_USING_CAN
+                config BSP_USING_CAN1
+                    bool "using CAN1"
+                    default n
+                config BSP_USING_CAN2
+                    bool "using CAN2"
+                    default n
+            endif
+		
 endmenu
 
 menu "Onboard Peripheral Drivers"