[bsp]添加ch32v307vct6 (#6331)

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

+mainmenu "RT-Thread Configuration"
+
+config BSP_DIR
+    string
+    option env="BSP_ROOT"
+    default "."
+
+config RTT_DIR
+    string
+    option env="RTT_ROOT"
+    default "../../../.."
+
+config PKGS_DIR
+    string
+    option env="PKGS_ROOT"
+    default "packages"
+
+source "$RTT_DIR/Kconfig"
+source "$PKGS_DIR/Kconfig"
+source "../Libraries/Kconfig"
+source "board/Kconfig"

bsp/wch/risc-v/ch32v307v-r1/README.md

+# ch32v307v-r1 BSP 说明
+## 开发板简介
+
+CH32V307V-R1 是 WCH 推出的一款基于 RISC-V 内核的开发板，最高主频为 144Mhz。比较适合入门学习 RISC-V 架构。
+
+## 开发板图片
+
+![board](./figures/ch32v307.jpg)
+
+## 基本特性：
+
+- MCU：CH32V307VCT6，主频 144MHz，FLASH和RAM可配置
+- LED：2个，用户 LEDs， LED1（blue），LED2(red)。
+- 按键：3个，Reset， User 和 Download。
+- USB：2个，Tpye-C。
+- 网口：1个，内置 10M PHY。
+- 板载 WCH-Link 下载调试工具。
+
+更多信息和资源请访问[互联型RISC-V单片机 CH32V307](https://www.wch.cn/products/CH32V307.html)
+
+## 编译说明
+
+板级包支持 RISC-V GCC 开发环境，以下是具体版本信息：
+
+| IDE/编译器 | 已测试版本           |
+| ---------- | -------------------- |
+| GCC        | WCH RISC-V GCC 8.2.0 |
+
+## 使用说明
+
+>本章节是为刚接触 RT-Thread 的新手准备的使用说明，遵循简单的步骤即可将 RT-Thread 操作系统运行在该开发板上，看到实验效果 。
+
+### 快速上手
+
+本 BSP 为开发者提供 Scons编译配置。下面介绍如何将系统运行起来。
+
+#### 1、指定RISC-V GCC编译器
+
+推荐使用RT_Studio软件里面的编译器。
+
+##### 方法一：直接指定编译器路径。
+
+![method1](./figures/method1.png)
+
+##### 方法二：通过env设置编译器路径
+
+![method2](./figures/method2.png)
+
+```shell
+set RTT_EXEC_PATH=D:\RT-ThreadStudio\repo\Extract\ToolChain_Support_Packages\WCH\RISC-V-GCC-WCH\8.2.0\bin
+```
+
+> 注意：如果使用第二种方法，第一种方法设置的路劲将会失效。
+
+#### 2、生成dist文件夹
+
+```shell
+scons --dist
+```
+
+![dist](./figures/dist.png)
+
+#### 3、进入dist文件夹scons编译
+
+```shell
+scons
+```
+
+![scons](./figures/scons.png)
+
+最终会生成 **rtthread.bin** 文件。
+
+#### 4、硬件连接
+
+使用数据线连接板载 wch-link 到 PC，打开电源开关。
+
+#### 5、下载
+
+打开WCH RISC-V MCU ProgrammerTool下载软件，选择刚刚生成的 **rtthread.bin**  文件，进行下载。
+
+![tool](./figures/tool.png)
+
+> 注意：这里Chip Mem 设置为224K ROM + 96K RAM。不要以参考手册为准。
+
+#### 运行结果
+
+在终端工具里打开板载 wch-link 串口（WCHDapLink SERIAL，默认115200-8-1-N），复位设备后，在串口上可以看到 RT-Thread 的输出信息：
+
+![end](./figures/end.png)

bsp/wch/risc-v/ch32v307v-r1/SConscript

+# for module compiling
+import os
+Import('RTT_ROOT')
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

bsp/wch/risc-v/ch32v307v-r1/SConstruct

+import os
+import sys
+import rtconfig
+from SCons.Script import *
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../../../..')
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+try:
+    from building import *
+except:
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
+    exit(-1)
+
+
+TARGET = 'rtthread.' + rtconfig.TARGET_EXT
+
+DefaultEnvironment(tools=[])
+env = Environment(tools = ['mingw'],
+    AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,
+    AR = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+if rtconfig.PLATFORM in ['iccarm']:
+    env.Replace(CCCOM = ['$CC $CFLAGS $CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS -o $TARGET $SOURCES'])
+    env.Replace(ARFLAGS = [''])
+    env.Replace(LINKCOM = env["LINKCOM"] + ' --map project.map')
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+SDK_ROOT = os.path.abspath('./')
+
+if os.path.exists(SDK_ROOT + '/Libraries'):
+    libraries_path_prefix = SDK_ROOT + '/Libraries'
+else:
+    libraries_path_prefix = os.path.dirname(SDK_ROOT) + '/Libraries'
+
+SDK_LIB = libraries_path_prefix
+Export('SDK_LIB')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
+
+ch32_library = 'ch32v30x_libraries'
+rtconfig.BSP_LIBRARY_TYPE = ch32_library
+
+bsp_vdir = 'build'
+library_vdir = 'build/libraries'
+
+# include libraries
+objs.extend(SConscript(os.path.join(libraries_path_prefix, ch32_library, 'SConscript'), variant_dir=library_vdir + '/ch32_library', duplicate=0))
+
+# common include drivers
+objs.extend(SConscript(os.path.join(libraries_path_prefix, 'ch32_drivers', 'SConscript'), variant_dir=library_vdir + '/ch32_drivers', duplicate=0))
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/wch/risc-v/ch32v307v-r1/applications/SConscript

+from building import *
+import os
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+list = os.listdir(cwd)
+for item in list:
+    if os.path.isfile(os.path.join(cwd, item, 'SConscript')):
+        group = group + SConscript(os.path.join(item, 'SConscript'))
+
+Return('group')

bsp/wch/risc-v/ch32v307v-r1/applications/main.c

+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-23     liYony       first version
+ */
+
+#include <rtthread.h>
+
+int main(void)
+{
+    while (1)
+    {
+        rt_kprintf("Hello RT-Thread!\n");
+        rt_thread_mdelay(1000);
+    }
+}

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

+menu "Hardware Drivers Config"
+
+config SOC_CH32V307VC
+    bool
+    select SOC_RISCV_SERIES_CH32V307
+    select RT_USING_COMPONENTS_INIT
+    select RT_USING_USER_MAIN
+    default y
+
+menu "On-chip Peripheral Drivers"
+
+    config BSP_USING_UART
+        bool "Enable UART"
+        select RT_USING_SERIAL
+        default n
+
+        if BSP_USING_UART
+            config BSP_USING_UART1
+            bool "Enable UART1"
+            default n
+        endif
+
+endmenu
+
+menu "Onboard Peripheral Drivers"
+
+endmenu
+
+menu "Board extended module Drivers"
+
+endmenu
+
+endmenu

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

+import os
+import rtconfig
+from building import *
+
+Import('SDK_LIB')
+
+cwd = GetCurrentDir()
+
+# add general drivers
+src = Split('''
+board.c
+''')
+
+path =  [cwd]
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)
+Return('group')

bsp/wch/risc-v/ch32v307v-r1/board/board.c

+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-23     liYony       first version
+ */
+
+#include "board.h"
+#include <stdint.h>
+#include "drv_usart.h"
+#include <rthw.h>
+#include <rtthread.h>
+
+extern uint32_t SystemCoreClock;
+
+static uint32_t _SysTick_Config(rt_uint32_t ticks)
+{
+    NVIC_SetPriority(SysTicK_IRQn,0xf0);
+    NVIC_SetPriority(Software_IRQn,0xf0);
+    NVIC_EnableIRQ(SysTicK_IRQn);
+    NVIC_EnableIRQ(Software_IRQn);
+    SysTick->CTLR=0;
+    SysTick->SR=0;
+    SysTick->CNT=0;
+    SysTick->CMP=ticks-1;
+    SysTick->CTLR=0xF;
+    return 0;
+}
+
+#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
+#define RT_HEAP_SIZE (4096)
+static uint32_t rt_heap[RT_HEAP_SIZE];
+RT_WEAK void *rt_heap_begin_get(void)
+{
+    return rt_heap;
+}
+
+RT_WEAK void *rt_heap_end_get(void)
+{
+    return rt_heap + RT_HEAP_SIZE;
+}
+#endif
+
+/**
+ * This function will initial your board.
+ */
+void rt_hw_board_init()
+{
+    /* System Tick Configuration */
+    _SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
+
+#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
+    rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
+#endif
+    /* USART driver initialization is open by default */
+#ifdef RT_USING_SERIAL
+    rt_hw_usart_init();
+#endif
+#ifdef RT_USING_CONSOLE
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+#endif
+    /* Call components board initial (use INIT_BOARD_EXPORT()) */
+#ifdef RT_USING_COMPONENTS_INIT
+    rt_components_board_init();
+#endif
+
+}
+
+void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
+void SysTick_Handler(void)
+{
+    GET_INT_SP();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    SysTick->SR=0;
+    rt_tick_increase();
+    /* leave interrupt */
+    rt_interrupt_leave();
+    FREE_INT_SP();
+
+}

bsp/wch/risc-v/ch32v307v-r1/board/board.h

+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-08-23     liYony       first version
+ */
+
+// <<< Use Configuration Wizard in Context Menu >>>
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#include "ch32v30x.h"
+
+/* board configuration */
+#define SRAM_SIZE  96
+#define SRAM_END (0x20000000 + SRAM_SIZE * 1024)
+
+extern int _ebss;
+#define HEAP_BEGIN  ((void *)&_ebss)
+#define HEAP_END    (SRAM_END-_stack_size)
+
+void rt_hw_board_init(void);
+
+#endif /* __BOARD_H__ */

bsp/wch/risc-v/ch32v307v-r1/board/linker_scripts/link.lds

+ENTRY( _start )
+
+__stack_size = 2048;
+
+PROVIDE( _stack_size = __stack_size );
+
+
+MEMORY
+{
+    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 224K
+    RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 96K
+}
+
+
+SECTIONS
+{
+
+    .init :
+    {
+        _sinit = .;
+        . = ALIGN(4);
+        KEEP(*(SORT_NONE(.init)))
+        . = ALIGN(4);
+        _einit = .;
+    } >FLASH AT>FLASH
+
+  .vector :
+  {
+      *(.vector);
+      . = ALIGN(64);
+  } >FLASH AT>FLASH
+
+    .text :
+    {
+        . = ALIGN(4);
+        *(.text)
+        *(.text.*)
+        *(.rodata)
+        *(.rodata*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.gnu.linkonce.t.*)
+
+         /* section information for finsh shell */
+    . = ALIGN(4);
+    __fsymtab_start = .;
+    KEEP(*(FSymTab))
+    __fsymtab_end = .;
+    . = ALIGN(4);
+    __vsymtab_start = .;
+    KEEP(*(VSymTab))
+    __vsymtab_end = .;
+    . = ALIGN(4);
+
+    /* section information for initial. */
+    . = ALIGN(4);
+    __rt_init_start = .;
+    KEEP(*(SORT(.rti_fn*)))
+    __rt_init_end = .;
+    . = ALIGN(4);
+
+    /* section information for modules */
+    . = ALIGN(4);
+    __rtmsymtab_start = .;
+    KEEP(*(RTMSymTab))
+    __rtmsymtab_end = .;
+        . = ALIGN(4);
+
+    } >FLASH AT>FLASH
+
+    .fini :
+    {
+        KEEP(*(SORT_NONE(.fini)))
+        . = ALIGN(4);
+    } >FLASH AT>FLASH
+
+    PROVIDE( _etext = . );
+    PROVIDE( _eitcm = . );
+
+    .preinit_array  :
+    {
+      PROVIDE_HIDDEN (__preinit_array_start = .);
+      KEEP (*(.preinit_array))
+      PROVIDE_HIDDEN (__preinit_array_end = .);
+    } >FLASH AT>FLASH
+
+    .init_array     :
+    {
+      PROVIDE_HIDDEN (__init_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+      KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+      PROVIDE_HIDDEN (__init_array_end = .);
+    } >FLASH AT>FLASH
+
+    .fini_array     :
+    {
+      PROVIDE_HIDDEN (__fini_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+      KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+      PROVIDE_HIDDEN (__fini_array_end = .);
+    } >FLASH AT>FLASH
+
+    .ctors          :
+    {
+      /* gcc uses crtbegin.o to find the start of
+         the constructors, so we make sure it is
+         first.  Because this is a wildcard, it
+         doesn't matter if the user does not
+         actually link against crtbegin.o; the
+         linker won't look for a file to match a
+         wildcard.  The wildcard also means that it
+         doesn't matter which directory crtbegin.o
+         is in.  */
+      KEEP (*crtbegin.o(.ctors))
+      KEEP (*crtbegin?.o(.ctors))
+      /* We don't want to include the .ctor section from
+         the crtend.o file until after the sorted ctors.
+         The .ctor section from the crtend file contains the
+         end of ctors marker and it must be last */
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+      KEEP (*(SORT(.ctors.*)))
+      KEEP (*(.ctors))
+    } >FLASH AT>FLASH
+
+    .dtors          :
+    {
+      KEEP (*crtbegin.o(.dtors))
+      KEEP (*crtbegin?.o(.dtors))
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+      KEEP (*(SORT(.dtors.*)))
+      KEEP (*(.dtors))
+    } >FLASH AT>FLASH
+
+    .dalign :
+    {
+        . = ALIGN(4);
+        PROVIDE(_data_vma = .);
+    } >RAM AT>FLASH
+
+    .dlalign :
+    {
+        . = ALIGN(4);
+        PROVIDE(_data_lma = .);
+    } >FLASH AT>FLASH
+
+    .data :
+    {
+        *(.gnu.linkonce.r.*)
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        . = ALIGN(8);
+        PROVIDE( __global_pointer$ = . + 0x800 );
+        *(.sdata .sdata.*)
+        *(.sdata2.*)
+        *(.gnu.linkonce.s.*)
+        . = ALIGN(8);
+        *(.srodata.cst16)
+        *(.srodata.cst8)
+        *(.srodata.cst4)
+        *(.srodata.cst2)
+        *(.srodata .srodata.*)
+        . = ALIGN(4);
+        PROVIDE( _edata = .);
+    } >RAM AT>FLASH
+
+    .bss :
+    {
+        . = ALIGN(4);
+        PROVIDE( _sbss = .);
+        *(.sbss*)
+        *(.gnu.linkonce.sb.*)
+        *(.bss*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON*)
+        . = ALIGN(4);
+        PROVIDE( _ebss = .);
+    } >RAM AT>FLASH
+
+    PROVIDE( _end = _ebss);
+    PROVIDE( end = . );
+
+    .stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
+    {
+        . = ALIGN(4);
+        PROVIDE(_susrstack = . );
+        . = . + __stack_size;
+        PROVIDE( _eusrstack = .);
+    } >RAM
+
+}

bsp/wch/risc-v/ch32v307v-r1/rtconfig.h

+#ifndef RT_CONFIG_H__
+#define RT_CONFIG_H__
+
+/* Automatically generated file; DO NOT EDIT. */
+/* RT-Thread Configuration */
+
+/* RT-Thread Kernel */
+
+#define RT_NAME_MAX 8
+#define RT_ALIGN_SIZE 4
+#define RT_THREAD_PRIORITY_32
+#define RT_THREAD_PRIORITY_MAX 32
+#define RT_TICK_PER_SECOND 1000
+#define RT_USING_HOOK
+#define RT_HOOK_USING_FUNC_PTR
+#define RT_USING_IDLE_HOOK
+#define RT_IDLE_HOOK_LIST_SIZE 4
+#define IDLE_THREAD_STACK_SIZE 256
+#define RT_USING_TIMER_SOFT
+#define RT_TIMER_THREAD_PRIO 4
+#define RT_TIMER_THREAD_STACK_SIZE 512
+
+/* kservice optimization */
+
+
+/* Inter-Thread communication */
+
+#define RT_USING_SEMAPHORE
+#define RT_USING_MUTEX
+#define RT_USING_EVENT
+#define RT_USING_MAILBOX
+#define RT_USING_MESSAGEQUEUE
+
+/* Memory Management */
+
+#define RT_USING_SMALL_MEM
+#define RT_USING_SMALL_MEM_AS_HEAP
+#define RT_USING_HEAP
+
+/* Kernel Device Object */
+
+#define RT_USING_DEVICE
+#define RT_USING_CONSOLE
+#define RT_CONSOLEBUF_SIZE 128
+#define RT_CONSOLE_DEVICE_NAME "uart1"
+#define RT_VER_NUM 0x40101
+#define ARCH_RISCV
+
+/* RT-Thread Components */
+
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+#define RT_MAIN_THREAD_STACK_SIZE 2048
+#define RT_MAIN_THREAD_PRIORITY 10
+#define RT_USING_MSH
+#define RT_USING_FINSH
+#define FINSH_USING_MSH
+#define FINSH_THREAD_NAME "tshell"
+#define FINSH_THREAD_PRIORITY 20
+#define FINSH_THREAD_STACK_SIZE 1024
+#define FINSH_USING_HISTORY
+#define FINSH_HISTORY_LINES 5
+#define FINSH_USING_SYMTAB
+#define FINSH_CMD_SIZE 80
+#define MSH_USING_BUILT_IN_COMMANDS
+#define FINSH_USING_DESCRIPTION
+#define FINSH_ARG_MAX 10
+
+/* Device Drivers */
+
+#define RT_USING_DEVICE_IPC
+#define RT_USING_SERIAL
+#define RT_USING_SERIAL_V1
+#define RT_SERIAL_RB_BUFSZ 64
+#define RT_USING_PIN
+
+/* Using USB */
+
+
+/* C/C++ and POSIX layer */
+
+#define RT_LIBC_DEFAULT_TIMEZONE 8
+
+/* POSIX (Portable Operating System Interface) layer */
+
+
+/* Interprocess Communication (IPC) */
+
+
+/* Socket is in the 'Network' category */
+
+
+/* Network */
+
+
+/* Utilities */
+
+
+/* RT-Thread Utestcases */
+
+
+/* RT-Thread online packages */
+
+/* IoT - internet of things */
+
+
+/* Wi-Fi */
+
+/* Marvell WiFi */
+
+
+/* Wiced WiFi */
+
+
+/* IoT Cloud */
+
+
+/* security packages */
+
+
+/* language packages */
+
+/* JSON: JavaScript Object Notation, a lightweight data-interchange format */
+
+
+/* XML: Extensible Markup Language */
+
+
+/* multimedia packages */
+
+/* LVGL: powerful and easy-to-use embedded GUI library */
+
+
+/* u8g2: a monochrome graphic library */
+
+
+/* PainterEngine: A cross-platform graphics application framework written in C language */
+
+
+/* tools packages */
+
+
+/* system packages */
+
+/* enhanced kernel services */
+
+
+/* acceleration: Assembly language or algorithmic acceleration packages */
+
+
+/* CMSIS: ARM Cortex-M Microcontroller Software Interface Standard */
+
+
+/* Micrium: Micrium software products porting for RT-Thread */
+
+
+/* peripheral libraries and drivers */
+
+
+/* kendryte-sdk: Kendryte SDK */
+
+
+/* AI packages */
+
+
+/* miscellaneous packages */
+
+/* project laboratory */
+
+/* samples: kernel and components samples */
+
+
+/* entertainment: terminal games and other interesting software packages */
+
+#define SOC_RISCV_FAMILY_CH32
+#define SOC_RISCV_SERIES_CH32V307
+
+/* Hardware Drivers Config */
+
+#define SOC_CH32V307VC
+
+/* On-chip Peripheral Drivers */
+
+#define BSP_USING_UART
+#define BSP_USING_UART1
+
+/* Onboard Peripheral Drivers */
+
+/* Board extended module Drivers */
+
+
+#endif

bsp/wch/risc-v/ch32v307v-r1/rtconfig.py

+import os
+ARCH     = 'risc-v'
+CPU      = 'ch32v3'
+# toolchains options
+CROSS_TOOL  = 'gcc'
+
+#------- toolchains path -------------------------------------------------------
+if os.getenv('RTT_CC'):
+    CROSS_TOOL = os.getenv('RTT_CC')
+
+if  CROSS_TOOL == 'gcc':
+    PLATFORM    = 'gcc'
+    EXEC_PATH   = r'D:\RT-ThreadStudio\repo\Extract\ToolChain_Support_Packages\WCH\RISC-V-GCC-WCH\8.2.0\bin'
+else:
+    print('Please make sure your toolchains is GNU GCC!')
+    exit(0)
+	
+if os.getenv('RTT_EXEC_PATH'):
+    EXEC_PATH = os.getenv('RTT_EXEC_PATH')
+
+BUILD = 'debug'
+#BUILD = 'release'
+
+CORE = 'risc-v'
+MAP_FILE = 'rtthread.map'
+LINK_FILE = './board/linker_scripts/link.lds'
+TARGET_NAME = 'rtthread.bin'
+
+#------- GCC settings ----------------------------------------------------------
+if PLATFORM == 'gcc':
+    # toolchains
+    PREFIX = 'riscv-none-embed-'
+    CC = PREFIX + 'gcc'
+    CXX= PREFIX + 'g++'
+    AS = PREFIX + 'gcc'
+    AR = PREFIX + 'ar'
+    LINK = PREFIX + 'gcc'
+    TARGET_EXT = 'elf'
+    SIZE = PREFIX + 'size'
+    OBJDUMP = PREFIX + 'objdump'
+    OBJCPY = PREFIX + 'objcopy'
+
+    DEVICE = ' -march=rv32imac -mabi=ilp32 -DUSE_PLIC -DUSE_M_TIME -DNO_INIT -mcmodel=medany -msmall-data-limit=8 -L.  -nostartfiles  -lc '
+    CFLAGS = DEVICE
+    CFLAGS += ' -save-temps=obj'
+    AFLAGS = '-c'+ DEVICE + ' -x assembler-with-cpp'
+    LFLAGS = DEVICE
+    LFLAGS += ' -Wl,--gc-sections,-cref,-Map=' + MAP_FILE
+    LFLAGS += ' -T ' + LINK_FILE
+    LFLAGS += ' -Wl,-wrap=memset'
+
+    CPATH = ''
+    LPATH = ''
+
+    if BUILD == 'debug':
+        CFLAGS += ' -O0 -g3'
+        AFLAGS += ' -g3'
+    else:
+        CFLAGS += ' -O2'
+
+    POST_ACTION = OBJCPY + ' -O binary $TARGET ' + TARGET_NAME + '\n'
+    POST_ACTION += SIZE + ' $TARGET\n'
+
+def dist_handle(BSP_ROOT, dist_dir):
+    import sys
+    cwd_path = os.getcwd()
+    sys.path.append(os.path.join(os.path.dirname(BSP_ROOT), 'tools'))
+    from sdk_dist import dist_do_building
+    dist_do_building(BSP_ROOT, dist_dir)
\ No newline at end of file