feat(bsp): New bsp for ch32 has been added.

1.Add the general part bsp of ch32 (including system clock, software interrupts, interrupt controllers, etc.). Supports V00X/V10X/V20X/V30X (Although the V00X series is supported, the sram of the chip is too small and it is not recommended for use).

bsp/wch/common/include/board/mr_board.h

@@ -0,0 +1,46 @@
+/**
+ * @copyright (c) 2024, MacRsh
+ *
+ * @license SPDX-License-Identifier: Apache-2.0
+ *
+ * @date 2024-06-12        MacRsh        First version
+ */
+
+#ifndef __MR_BOARD_H__
+#define __MR_BOARD_H__
+
+#include <mr_config.h>
+#if defined(MR_USE_SERIES_V00X)
+#include "ch32v00x.h"
+#elif defined(MR_USE_SERIES_V10X)
+#include "ch32v10x.h"
+#elif defined(MR_USE_SERIES_V20X)
+#include "ch32v20x.h"
+#elif defined(MR_USE_SERIES_V30X)
+#include "ch32v30x.h"
+#else
+#error "Series not supported"
+#endif /* defined(MR_USE_SERIES_V00X) */
+#include "core_riscv.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @addtogroup Board
+ * @{
+ */
+
+/**
+ * @brief This function initializes the board systick.
+ */
+void mr_board_systick_init(void);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __MR_BOARD_H__ */