Merge pull request #2088 from RT-Thread/bsp_k210

[libcpu] Add k210 BSP.

20 files changed, 1412 insertions, 0 deletions

diff --git a/bsp/k210/.config b/bsp/k210/.config
new file mode 100644
index 0000000000..d1279d3b74
--- /dev/null
+++ b/bsp/k210/.config
@@ -0,0 +1,374 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# RT-Thread Project Configuration
+#
+
+#
+# RT-Thread Kernel
+#
+CONFIG_RT_NAME_MAX=8
+# CONFIG_RT_USING_SMP is not set
+CONFIG_RT_ALIGN_SIZE=8
+# CONFIG_RT_THREAD_PRIORITY_8 is not set
+CONFIG_RT_THREAD_PRIORITY_32=y
+# CONFIG_RT_THREAD_PRIORITY_256 is not set
+CONFIG_RT_THREAD_PRIORITY_MAX=32
+CONFIG_RT_TICK_PER_SECOND=100
+CONFIG_RT_USING_OVERFLOW_CHECK=y
+CONFIG_RT_USING_HOOK=y
+CONFIG_RT_USING_IDLE_HOOK=y
+CONFIG_RT_IDEL_HOOK_LIST_SIZE=4
+CONFIG_IDLE_THREAD_STACK_SIZE=1024
+# CONFIG_RT_USING_TIMER_SOFT is not set
+CONFIG_RT_DEBUG=y
+CONFIG_RT_DEBUG_INIT_CONFIG=y
+CONFIG_RT_DEBUG_INIT=1
+# CONFIG_RT_DEBUG_THREAD_CONFIG is not set
+# CONFIG_RT_DEBUG_SCHEDULER_CONFIG is not set
+# CONFIG_RT_DEBUG_IPC_CONFIG is not set
+# CONFIG_RT_DEBUG_TIMER_CONFIG is not set
+# CONFIG_RT_DEBUG_IRQ_CONFIG is not set
+# CONFIG_RT_DEBUG_MEM_CONFIG is not set
+# CONFIG_RT_DEBUG_SLAB_CONFIG is not set
+# CONFIG_RT_DEBUG_MEMHEAP_CONFIG is not set
+# CONFIG_RT_DEBUG_MODULE_CONFIG is not set
+
+#
+# Inter-Thread communication
+#
+CONFIG_RT_USING_SEMAPHORE=y
+CONFIG_RT_USING_MUTEX=y
+CONFIG_RT_USING_EVENT=y
+CONFIG_RT_USING_MAILBOX=y
+CONFIG_RT_USING_MESSAGEQUEUE=y
+# CONFIG_RT_USING_SIGNALS is not set
+
+#
+# Memory Management
+#
+CONFIG_RT_USING_MEMPOOL=y
+# CONFIG_RT_USING_MEMHEAP is not set
+# CONFIG_RT_USING_NOHEAP is not set
+CONFIG_RT_USING_SMALL_MEM=y
+# CONFIG_RT_USING_SLAB is not set
+# CONFIG_RT_USING_MEMTRACE is not set
+CONFIG_RT_USING_HEAP=y
+
+#
+# Kernel Device Object
+#
+CONFIG_RT_USING_DEVICE=y
+# CONFIG_RT_USING_DEVICE_OPS is not set
+# CONFIG_RT_USING_INTERRUPT_INFO is not set
+CONFIG_RT_USING_CONSOLE=y
+CONFIG_RT_CONSOLEBUF_SIZE=128
+CONFIG_RT_CONSOLE_DEVICE_NAME="uarths"
+CONFIG_RT_VER_NUM=0x40000
+CONFIG_ARCH_CPU_64BIT=y
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_RISCV64=y
+# CONFIG_ARCH_CPU_STACK_GROWS_UPWARD is not set
+
+#
+# RT-Thread Components
+#
+CONFIG_RT_USING_COMPONENTS_INIT=y
+CONFIG_RT_USING_USER_MAIN=y
+CONFIG_RT_MAIN_THREAD_STACK_SIZE=8192
+CONFIG_RT_MAIN_THREAD_PRIORITY=10
+
+#
+# C++ features
+#
+# CONFIG_RT_USING_CPLUSPLUS is not set
+
+#
+# Command shell
+#
+CONFIG_RT_USING_FINSH=y
+CONFIG_FINSH_THREAD_NAME="tshell"
+CONFIG_FINSH_USING_HISTORY=y
+CONFIG_FINSH_HISTORY_LINES=5
+CONFIG_FINSH_USING_SYMTAB=y
+CONFIG_FINSH_USING_DESCRIPTION=y
+# CONFIG_FINSH_ECHO_DISABLE_DEFAULT is not set
+CONFIG_FINSH_THREAD_PRIORITY=20
+CONFIG_FINSH_THREAD_STACK_SIZE=4096
+CONFIG_FINSH_CMD_SIZE=80
+# CONFIG_FINSH_USING_AUTH is not set
+CONFIG_FINSH_USING_MSH=y
+CONFIG_FINSH_USING_MSH_DEFAULT=y
+CONFIG_FINSH_USING_MSH_ONLY=y
+CONFIG_FINSH_ARG_MAX=10
+
+#
+# Device virtual file system
+#
+CONFIG_RT_USING_DFS=y
+CONFIG_DFS_USING_WORKDIR=y
+CONFIG_DFS_FILESYSTEMS_MAX=4
+CONFIG_DFS_FILESYSTEM_TYPES_MAX=4
+CONFIG_DFS_FD_MAX=16
+# CONFIG_RT_USING_DFS_MNTTABLE is not set
+# CONFIG_RT_USING_DFS_ELMFAT is not set
+CONFIG_RT_USING_DFS_DEVFS=y
+# CONFIG_RT_USING_DFS_ROMFS is not set
+# CONFIG_RT_USING_DFS_RAMFS is not set
+# CONFIG_RT_USING_DFS_UFFS is not set
+# CONFIG_RT_USING_DFS_JFFS2 is not set
+
+#
+# Device Drivers
+#
+CONFIG_RT_USING_DEVICE_IPC=y
+CONFIG_RT_PIPE_BUFSZ=512
+CONFIG_RT_USING_SERIAL=y
+CONFIG_RT_SERIAL_USING_DMA=y
+# CONFIG_RT_USING_CAN is not set
+# CONFIG_RT_USING_HWTIMER is not set
+# CONFIG_RT_USING_CPUTIME is not set
+# CONFIG_RT_USING_I2C is not set
+CONFIG_RT_USING_PIN=y
+# CONFIG_RT_USING_ADC is not set
+# CONFIG_RT_USING_PWM is not set
+# CONFIG_RT_USING_MTD_NOR is not set
+# CONFIG_RT_USING_MTD_NAND is not set
+# CONFIG_RT_USING_MTD is not set
+# CONFIG_RT_USING_PM is not set
+# CONFIG_RT_USING_RTC is not set
+# CONFIG_RT_USING_SDIO is not set
+# CONFIG_RT_USING_SPI is not set
+# CONFIG_RT_USING_WDT is not set
+# CONFIG_RT_USING_AUDIO is not set
+
+#
+# Using WiFi
+#
+# CONFIG_RT_USING_WIFI is not set
+
+#
+# Using USB
+#
+# CONFIG_RT_USING_USB_HOST is not set
+# CONFIG_RT_USING_USB_DEVICE is not set
+
+#
+# POSIX layer and C standard library
+#
+CONFIG_RT_USING_LIBC=y
+# CONFIG_RT_USING_PTHREADS is not set
+CONFIG_RT_USING_POSIX=y
+# CONFIG_RT_USING_POSIX_MMAP is not set
+# CONFIG_RT_USING_POSIX_TERMIOS is not set
+# CONFIG_RT_USING_POSIX_AIO is not set
+# CONFIG_RT_USING_MODULE is not set
+
+#
+# Network
+#
+
+#
+# Socket abstraction layer
+#
+# CONFIG_RT_USING_SAL is not set
+
+#
+# light weight TCP/IP stack
+#
+# CONFIG_RT_USING_LWIP is not set
+
+#
+# Modbus master and slave stack
+#
+# CONFIG_RT_USING_MODBUS is not set
+
+#
+# AT commands
+#
+# CONFIG_RT_USING_AT is not set
+
+#
+# VBUS(Virtual Software BUS)
+#
+# CONFIG_RT_USING_VBUS is not set
+
+#
+# Utilities
+#
+# CONFIG_RT_USING_LOGTRACE is not set
+# CONFIG_RT_USING_RYM is not set
+# CONFIG_RT_USING_ULOG is not set
+# CONFIG_RT_USING_UTEST is not set
+
+#
+# RT-Thread online packages
+#
+
+#
+# IoT - internet of things
+#
+# CONFIG_PKG_USING_PAHOMQTT is not set
+# CONFIG_PKG_USING_WEBCLIENT is not set
+# CONFIG_PKG_USING_WEBNET is not set
+# CONFIG_PKG_USING_MONGOOSE is not set
+# CONFIG_PKG_USING_WEBTERMINAL is not set
+# CONFIG_PKG_USING_CJSON is not set
+# CONFIG_PKG_USING_JSMN is not set
+# CONFIG_PKG_USING_LJSON is not set
+# CONFIG_PKG_USING_EZXML is not set
+# CONFIG_PKG_USING_NANOPB is not set
+
+#
+# Wi-Fi
+#
+
+#
+# Marvell WiFi
+#
+# CONFIG_PKG_USING_WLANMARVELL is not set
+
+#
+# Wiced WiFi
+#
+# CONFIG_PKG_USING_WLAN_WICED is not set
+# CONFIG_PKG_USING_COAP is not set
+# CONFIG_PKG_USING_NOPOLL is not set
+# CONFIG_PKG_USING_NETUTILS is not set
+# CONFIG_PKG_USING_AT_DEVICE is not set
+# CONFIG_PKG_USING_WIZNET is not set
+
+#
+# IoT Cloud
+#
+# CONFIG_PKG_USING_ONENET is not set
+# CONFIG_PKG_USING_GAGENT_CLOUD is not set
+# CONFIG_PKG_USING_ALI_IOTKIT is not set
+# CONFIG_PKG_USING_AZURE is not set
+# CONFIG_PKG_USING_TENCENT_IOTKIT is not set
+
+#
+# security packages
+#
+# CONFIG_PKG_USING_MBEDTLS is not set
+# CONFIG_PKG_USING_libsodium is not set
+# CONFIG_PKG_USING_TINYCRYPT is not set
+
+#
+# language packages
+#
+# CONFIG_PKG_USING_LUA is not set
+# CONFIG_PKG_USING_JERRYSCRIPT is not set
+# CONFIG_PKG_USING_MICROPYTHON is not set
+
+#
+# multimedia packages
+#
+# CONFIG_PKG_USING_OPENMV is not set
+# CONFIG_PKG_USING_MUPDF is not set
+
+#
+# tools packages
+#
+# CONFIG_PKG_USING_CMBACKTRACE is not set
+# CONFIG_PKG_USING_EASYFLASH is not set
+# CONFIG_PKG_USING_EASYLOGGER is not set
+# CONFIG_PKG_USING_SYSTEMVIEW is not set
+# CONFIG_PKG_USING_RDB is not set
+# CONFIG_PKG_USING_QRCODE is not set
+# CONFIG_PKG_USING_ULOG_EASYFLASH is not set
+
+#
+# system packages
+#
+# CONFIG_PKG_USING_GUIENGINE is not set
+# CONFIG_PKG_USING_CAIRO is not set
+# CONFIG_PKG_USING_PIXMAN is not set
+# CONFIG_PKG_USING_LWEXT4 is not set
+# CONFIG_PKG_USING_PARTITION is not set
+# CONFIG_PKG_USING_FAL is not set
+# CONFIG_PKG_USING_SQLITE is not set
+# CONFIG_PKG_USING_RTI is not set
+# CONFIG_PKG_USING_LITTLEVGL2RTT is not set
+# CONFIG_PKG_USING_CMSIS is not set
+# CONFIG_PKG_USING_DFS_YAFFS is not set
+# CONFIG_PKG_USING_LITTLEFS is not set
+
+#
+# peripheral libraries and drivers
+#
+# CONFIG_PKG_USING_REALTEK_AMEBA is not set
+# CONFIG_PKG_USING_SHT2X is not set
+# CONFIG_PKG_USING_AHT10 is not set
+# CONFIG_PKG_USING_AP3216C is not set
+# CONFIG_PKG_USING_STM32_SDIO is not set
+# CONFIG_PKG_USING_ICM20608 is not set
+# CONFIG_PKG_USING_U8G2 is not set
+# CONFIG_PKG_USING_BUTTON is not set
+# CONFIG_PKG_USING_MPU6XXX is not set
+# CONFIG_PKG_USING_PCF8574 is not set
+CONFIG_PKG_USING_KENDRYTE_SDK=y
+CONFIG_PKG_KENDRYTE_SDK_PATH="/packages/peripherals/kendryte-sdk"
+CONFIG_PKG_USING_KENDRYTE_SDK_V052=y
+# CONFIG_PKG_USING_KENDRYTE_SDK_LATEST_VERSION is not set
+CONFIG_PKG_KENDRYTE_SDK_VER="v0.5.2"
+
+#
+# miscellaneous packages
+#
+# CONFIG_PKG_USING_LIBCSV is not set
+# CONFIG_PKG_USING_OPTPARSE is not set
+# CONFIG_PKG_USING_FASTLZ is not set
+# CONFIG_PKG_USING_MINILZO is not set
+# CONFIG_PKG_USING_QUICKLZ is not set
+# CONFIG_PKG_USING_MULTIBUTTON is not set
+# CONFIG_PKG_USING_CANFESTIVAL is not set
+# CONFIG_PKG_USING_ZLIB is not set
+# CONFIG_PKG_USING_DSTR is not set
+# CONFIG_PKG_USING_TINYFRAME is not set
+
+#
+# sample package
+#
+
+#
+# samples: kernel and components samples
+#
+# CONFIG_PKG_USING_KERNEL_SAMPLES is not set
+# CONFIG_PKG_USING_FILESYSTEM_SAMPLES is not set
+# CONFIG_PKG_USING_NETWORK_SAMPLES is not set
+# CONFIG_PKG_USING_PERIPHERAL_SAMPLES is not set
+
+#
+# example package: hello
+#
+# CONFIG_PKG_USING_HELLO is not set
+
+#
+# Privated Packages of RealThread
+#
+# CONFIG_PKG_USING_CODEC is not set
+# CONFIG_PKG_USING_PLAYER is not set
+# CONFIG_PKG_USING_PERSIMMON_SRC is not set
+# CONFIG_PKG_USING_JS_PERSIMMON is not set
+# CONFIG_PKG_USING_JERRYSCRIPT_WIN32 is not set
+
+#
+# Network Utilities
+#
+# CONFIG_PKG_USING_WICED is not set
+# CONFIG_PKG_USING_CLOUDSDK is not set
+# CONFIG_PKG_USING_COREMARK is not set
+# CONFIG_PKG_USING_POWER_MANAGER is not set
+# CONFIG_PKG_USING_RT_OTA is not set
+# CONFIG_PKG_USING_RDBD_SRC is not set
+# CONFIG_PKG_USING_RTINSIGHT is not set
+# CONFIG_PKG_USING_SMARTCONFIG is not set
+# CONFIG_PKG_USING_RTX is not set
+CONFIG_BOARD_K210_EVB=y
+CONFIG_BSP_USING_UART_HS=y
+# CONFIG_BSP_USING_UART1 is not set
+# CONFIG_BSP_USING_UART2 is not set
+# CONFIG_BSP_USING_UART3 is not set
+# CONFIG_BSP_USING_I2C1 is not set
+# CONFIG_BSP_USING_SPI1 is not set
+CONFIG___STACKSIZE__=4096
diff --git a/bsp/k210/Kconfig b/bsp/k210/Kconfig
new file mode 100644
index 0000000000..ccb4adf6dc
--- /dev/null
+++ b/bsp/k210/Kconfig
@@ -0,0 +1,31 @@
+mainmenu "RT-Thread Project 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"
+
+config BOARD_K210_EVB
+    bool
+    select ARCH_RISCV64
+    select PKG_USING_KENDRYTE_SDK
+    default y
+
+source "driver/Kconfig"
+
+config __STACKSIZE__
+    int "stack size for interrupt"
+    default 4096
diff --git a/bsp/k210/README.md b/bsp/k210/README.md
new file mode 100644
index 0000000000..6de922d7a2
--- /dev/null
+++ b/bsp/k210/README.md
@@ -0,0 +1,93 @@
+# Kendryte K210板级支持包说明
+
+## 1. 简介
+
+Kendryte K210 是集成机器视觉与机器听觉能力的系统级芯片(SoC)。使用台积电 (TSMC) 超低功耗的 28 纳米先进制程，具有双核64位处理器，拥有较好的功耗性能，稳定性与可靠性。该方案力求零门槛开发，可在最短时效部署于用户的产品中，赋予产品人工智能。
+
+Kendryte K210 定位于AI与IoT市场的SoC，同时是使用非常方便的MCU。
+
+Kendryte中文含义为勘智，而勘智取自勘物探智。这颗芯片主要应用领域为物联网领域，在物联网领域进行开发，因此为勘物；这颗芯片主要提供的是人工智能解决方案，在人工智能领域探索，因此为探智。
+
+* 具备机器视觉能力
+* 具备机器听觉能力
+* 更好的低功耗视觉处理速度与准确率
+* 具备卷积人工神经网络硬件加速器KPU，可高性能进行卷积人工神经网络运算
+* TSMC 28nm先进制程，温度范围-40°C到125°C，稳定可靠
+* 支持固件加密，难以使用普通方法破解
+* 独特的可编程IO阵列，使产品设计更加灵活
+* 低电压，与相同处理能力的系统相比具有更低功耗
+* 3.3V/1.8V双电压支持，无需电平转换，节约成本
+
+芯片规格包括如下：
+
+| 硬件 | 描述 |
+| -- | -- |
+|芯片型号| K210 |
+|CPU| 双核RV64GC |
+|主频| 400MHz |
+|片内SRAM| 8MB |
+| 外设 | 内嵌AES与SHA256算法加速器 |
+| | DVP、JTAG、OTP、FPIOA、GPIO、UART、SPI、RTC、I²S、I²C、WDT、Timer与PWM |
+
+## 2. 编译说明
+
+编译K210，需要先下载K210 BSP以及RT-Thread代码：
+
+    git clone https://github.com/BernardXiong/K210.git
+    cd K210
+    git submodule init
+    git submodule update
+
+    git clone https://github.com/RT-Thread/rt-thread.git
+    cd rt-thread
+    git checkout -b dev-4.0.x origin/dev-4.0.x
+
+注意，因为RT-Thread整体代码太庞大，所以并未把RT-Thread git repo以一个submodule方式加入到K210 BSP git repo中，
+而是需要把RT-Thread代码克隆到K210目录下，并切换到dev-4.0.x分支。
+
+编译推荐使用[env工具][1]，可以在console下进入到`K210`目录中，运行以下命令：
+
+    set RTT_EXEC_PATH=your_toolchains
+    scons
+
+来编译这个板级支持包。如果编译正确无误，会产生rtthread.elf、rtthread.bin文件。其中rtthread.bin需要烧写到设备中进行运行。
+
+## 3. 烧写及执行
+
+连接好串口，然后使用[K-Flash](https://kendryte.com/downloads/)工具进行烧写bin文件。
+
+![K-Flash](images/flash.png)
+
+### 3.1 运行结果
+
+如果编译 & 烧写无误，当复位设备后，会在串口上看到RT-Thread的启动logo信息：
+
+![terminal](images/k210.png)
+
+## 4. 驱动支持情况及计划
+
+| 驱动 | 支持情况  |  备注  |
+| ------ | ----  | :------:  |
+| UART | 支持 | 高速UART，用于shell |
+
+## 5. 联系人信息
+
+维护人：[bernard](https://github.com/BernardXiong)
+
+## 6. 注意事项
+
+在进行系统menuconfig配置时，以下项是必选的
+
+| 配置项 | 强制配置值 |
+| -----  | --------- |
+| Alignment size for CPU architecture data access | 8 |
+| The stack size of idle thread | > 1024 |
+| the device name for console | "uarths" |
+| Set main thread stack size | 4096 |
+
+## 7. 参考
+
+* 芯片[datasheet][2]
+
+  [1]: https://www.rt-thread.org/page/download.html
+  [2]: https://s3.cn-north-1.amazonaws.com.cn/dl.kendryte.com/documents/kendryte_datasheet_20180919020633.pdf
diff --git a/bsp/k210/SConscript b/bsp/k210/SConscript
new file mode 100644
index 0000000000..c7ef7659ec
--- /dev/null
+++ b/bsp/k210/SConscript
@@ -0,0 +1,14 @@
+# for module compiling
+import os
+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')
diff --git a/bsp/k210/SConstruct b/bsp/k210/SConstruct
new file mode 100644
index 0000000000..dc55b29194
--- /dev/null
+++ b/bsp/k210/SConstruct
@@ -0,0 +1,35 @@
+import os
+import sys
+import rtconfig
+
+from rtconfig import RTT_ROOT
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread.' + rtconfig.TARGET_EXT
+
+env = Environment(tools = ['mingw'],
+    AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+    AR = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+env['ASCOM'] = env['ASPPCOM']
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT, has_libcpu = False)
+
+stack_size = 4096
+
+stack_lds = open('link_stacksize.lds', 'w')
+if GetDepend('__STACKSIZE__'): stack_size = GetDepend('__STACKSIZE__')
+stack_lds.write('__STACKSIZE__ = %d;' % stack_size)
+stack_lds.close()
+
+# make a building
+DoBuilding(TARGET, objs)
diff --git a/bsp/k210/applications/SConscript b/bsp/k210/applications/SConscript
new file mode 100644
index 0000000000..c583d3016e
--- /dev/null
+++ b/bsp/k210/applications/SConscript
@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/bsp/k210/applications/main.c b/bsp/k210/applications/main.c
new file mode 100644
index 0000000000..b18163ef8d
--- /dev/null
+++ b/bsp/k210/applications/main.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018/09/30     Bernard      The first version
+ */
+
+#include <rtthread.h>
+#include <stdio.h>
+
+int main(void)
+{
+    rt_kprintf("Hello, world\n");
+
+    return 0;
+}
diff --git a/bsp/k210/applications/mnt.c b/bsp/k210/applications/mnt.c
new file mode 100644
index 0000000000..d528a7424d
--- /dev/null
+++ b/bsp/k210/applications/mnt.c
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+#include <rtthread.h>
+
+int mnt_init(void)
+{
+    return 0;
+}
diff --git a/bsp/k210/driver/Kconfig b/bsp/k210/driver/Kconfig
new file mode 100644
index 0000000000..902d7c2444
--- /dev/null
+++ b/bsp/k210/driver/Kconfig
@@ -0,0 +1,25 @@
+config BSP_USING_UART_HS
+    bool "Enable High Speed UART"
+    default y
+
+config BSP_USING_UART1
+    bool "Enable UART1 (GPIO0/1)"
+    default n
+
+config BSP_USING_UART2
+    bool "Enable UART2 (GPIO0/1)"
+    default n
+
+config BSP_USING_UART3
+    bool "Enable UART3 (GPIO0/1)"
+    default n
+
+config BSP_USING_I2C1
+    bool "Enable I2C1 (GPIO0/1)"
+    select RT_USING_I2C
+    default n
+
+config BSP_USING_SPI1
+    bool "Enable SPI1 (GPIO0/1)"
+    select RT_USING_SPI
+    default n
diff --git a/bsp/k210/driver/SConscript b/bsp/k210/driver/SConscript
new file mode 100644
index 0000000000..3ea01aa83f
--- /dev/null
+++ b/bsp/k210/driver/SConscript
@@ -0,0 +1,38 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Split('''
+board.c
+drv_uart.c
+''')
+CPPPATH = [cwd]
+
+if GetDepend('RT_USING_PIN'):
+    src += ['drv_gpio.c']
+
+if GetDepend('RT_USING_HWTIMER'):
+    src += ['drv_hw_timer.c']
+
+if GetDepend('RT_USING_CPUTIME'):
+    src += ['drv_cputime.c']
+
+if GetDepend('RT_USING_I2C'):
+    src += ['drv_i2c.c']
+
+if GetDepend('RT_USING_SPI'):
+    src += ['drv_spi.c']
+
+if GetDepend('RT_USING_PWM'):
+    src += ['drv_pwm.c']
+
+if GetDepend('RT_USING_RTC'):
+    src += ['drv_rtc.c']
+
+if GetDepend('RT_USING_WDT'):
+    src += ['drv_wdt.c']
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/bsp/k210/driver/board.c b/bsp/k210/driver/board.c
new file mode 100644
index 0000000000..aac2adbc49
--- /dev/null
+++ b/bsp/k210/driver/board.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "board.h"
+#include "tick.h"
+
+#include "drv_uart.h"
+
+#include "encoding.h"
+#include "fpioa.h"
+#include "dmac.h"
+
+#include "uarths.h"
+void rt_hw_console_output(const char *str)
+{
+    uarths_puts(str);
+    return ;
+}
+
+void init_bss(void)
+{
+    unsigned int *dst;
+
+    dst = &__bss_start;
+    while (dst < &__bss_end)
+    {
+        *dst++ = 0;
+    }
+}
+
+void cpu_entry(int cpuid)
+{
+    extern void entry(void);
+
+    /* disable global interrupt */
+    rt_hw_interrupt_disable();
+    if (cpuid == 0)
+    {
+        init_bss();
+        entry();
+    }
+    else
+    {
+        while (1) ;
+    }
+}
+
+#include <clint.h>
+#include <sysctl.h>
+
+int freq(void)
+{
+    rt_uint64_t value = 0;
+
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_PLL0);
+    rt_kprintf("PLL0: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_PLL1);
+    rt_kprintf("PLL1: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_PLL2);
+    rt_kprintf("PLL2: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_CPU);
+    rt_kprintf("CPU : %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_APB0);
+    rt_kprintf("APB0: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_APB1);
+    rt_kprintf("APB1: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_APB2);
+    rt_kprintf("APB2: %d\n", value);
+    value = sysctl_clock_get_freq(SYSCTL_CLOCK_HCLK);
+    rt_kprintf("HCLK: %d\n", value);
+
+    value = clint_get_time();
+    rt_kprintf("mtime: %d\n", value);
+
+    return 0;
+}
+MSH_CMD_EXPORT(freq, show freq info);
+
+void rt_hw_board_init(void)
+{
+    /* Init FPIOA */
+    fpioa_init();
+    /* Dmac init */
+    dmac_init();
+
+    /* initalize interrupt */
+    rt_hw_interrupt_init();
+    /* initialize hardware interrupt */
+    rt_hw_uart_init();
+    rt_hw_tick_init();
+
+#ifdef RT_USING_CONSOLE
+    /* set console device */
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+#endif /* RT_USING_CONSOLE */
+
+#ifdef RT_USING_HEAP
+    rt_kprintf("heap: [0x%08x - 0x%08x]\n", (rt_ubase_t) RT_HW_HEAP_BEGIN, (rt_ubase_t) RT_HW_HEAP_END);
+    /* initialize memory system */
+    rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
+#endif
+
+#ifdef RT_USING_COMPONENTS_INIT
+    rt_components_board_init();
+#endif
+}
diff --git a/bsp/k210/driver/board.h b/bsp/k210/driver/board.h
new file mode 100644
index 0000000000..0d270abd2b
--- /dev/null
+++ b/bsp/k210/driver/board.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-5-30      Bernard      the first version
+ */
+
+#ifndef BOARD_H__
+#define BOARD_H__
+
+extern unsigned int __bss_start;
+extern unsigned int __bss_end;
+
+#define RT_HW_HEAP_BEGIN    (void*)&__bss_end
+#define RT_HW_HEAP_END      (void*)(0x80000000 + 6 * 1024 * 1024)
+
+void rt_hw_board_init(void);
+
+#endif
diff --git a/bsp/k210/driver/drv_uart.c b/bsp/k210/driver/drv_uart.c
new file mode 100644
index 0000000000..74ba05e203
--- /dev/null
+++ b/bsp/k210/driver/drv_uart.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "board.h"
+#include "drv_uart.h"
+
+#include <stdio.h>
+
+// #include "uart.h"
+#include "uarths.h"
+#include "plic.h"
+
+struct device_uart
+{
+    rt_uint32_t hw_base;
+    rt_uint32_t irqno;
+};
+
+static rt_err_t  uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
+static rt_err_t  uart_control(struct rt_serial_device *serial, int cmd, void *arg);
+static int       drv_uart_putc(struct rt_serial_device *serial, char c);
+static int       drv_uart_getc(struct rt_serial_device *serial);
+
+static void     uart_irq_handler(int irqno, void *param);
+
+const struct rt_uart_ops _uart_ops =
+{
+    uart_configure,
+    uart_control,
+    drv_uart_putc,
+    drv_uart_getc,
+    RT_NULL
+};
+
+/*
+ * UART Initiation
+ */
+int rt_hw_uart_init(void)
+{
+    struct rt_serial_device *serial;
+    struct device_uart      *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+#ifdef BSP_USING_UART_HS
+    {
+        static struct rt_serial_device  serial_hs;
+        static struct device_uart       uart_hs;
+
+        serial  = &serial_hs;
+        uart    = &uart_hs;
+
+        serial->ops              = &_uart_ops;
+        serial->config           = config;
+        serial->config.baud_rate = 115200;
+
+        uart->hw_base   = UARTHS_BASE_ADDR;
+        uart->irqno     = IRQN_UARTHS_INTERRUPT;
+
+        /* initialize UART HS */
+        uarths_init();
+
+        rt_hw_serial_register(serial,
+                              "uarths",
+                              RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                              uart);
+    }
+#endif
+
+#ifdef BSP_USING_UART1
+    {
+        static struct rt_serial_device  serial1;
+        static struct device_uart       uart1;
+
+        serial  = &serial1;
+        uart    = &uart1;
+
+        serial->ops              = &_uart_ops;
+        serial->config           = config;
+        serial->config.baud_rate = 115200;
+
+        uart->hw_base   = UART1_BASE_ADDR;
+        uart->irqno     = IRQN_UART1_INTERRUPT;
+
+        rt_hw_serial_register(serial,
+                              "uarths",
+                              RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                              uart);
+    }
+#endif
+
+#ifdef BSP_USING_UART2
+#endif
+
+#ifdef BSP_USING_UART3
+#endif
+
+    return 0;
+}
+
+/*
+ * UART interface
+ */
+static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    rt_uint32_t baud_div;
+    struct device_uart *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    serial->config = *cfg;
+
+    uart = serial->parent.user_data;
+    RT_ASSERT(uart != RT_NULL);
+
+    /* Init UART Hardware */
+
+    /* Enable UART clock */
+
+    /* Set both receiver and transmitter in UART mode (not SIR) */
+
+    /* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
+
+    /* set baudrate */
+
+    return (RT_EOK);
+}
+
+static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct device_uart *uart;
+
+    uart = serial->parent.user_data;
+
+    RT_ASSERT(uart != RT_NULL);
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* Disable the UART Interrupt */
+        rt_hw_interrupt_mask(uart->irqno);
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT:
+        /* install interrupt */
+        rt_hw_interrupt_install(uart->irqno, uart_irq_handler,
+                                serial, serial->parent.parent.name);
+        rt_hw_interrupt_umask(uart->irqno);
+        break;
+    }
+
+    return (RT_EOK);
+}
+
+static int drv_uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct device_uart *uart;
+
+    uart = serial->parent.user_data;
+    if (uart->hw_base == UARTHS_BASE_ADDR)
+    {
+        uarths_putchar(c);
+    }
+    else
+    {
+        /* other uart */
+    }
+
+    return (1);
+}
+
+static int drv_uart_getc(struct rt_serial_device *serial)
+{
+    int ret = -1;
+    struct device_uart *uart = serial->parent.user_data;
+
+    if (uart->hw_base == UARTHS_BASE_ADDR)
+    {
+        ret = uarths_getc();
+        if (ret != EOF) return ret;
+    }
+
+    /* Receive Data Available */
+
+    return (-1);
+}
+
+/* UART ISR */
+static void uart_irq_handler(int irqno, void *param)
+{
+    rt_ubase_t isr;
+    struct rt_serial_device *serial = (struct rt_serial_device *)param;
+    struct device_uart *uart = serial->parent.user_data;
+
+    /* read interrupt status and clear it */
+    if (uart->hw_base == UARTHS_BASE_ADDR)
+    {
+        if (uarths->ip.rxwm) 
+            rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+    }
+}
diff --git a/bsp/k210/driver/drv_uart.h b/bsp/k210/driver/drv_uart.h
new file mode 100644
index 0000000000..deac702fe1
--- /dev/null
+++ b/bsp/k210/driver/drv_uart.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018/10/01     Bernard      The first version
+ */
+
+#ifndef __DRV_UART_H__
+#define __DRV_UART_H__
+
+int rt_hw_uart_init(void);
+
+#endif /* __DRV_UART_H__ */
diff --git a/bsp/k210/images/flash.png b/bsp/k210/images/flash.png
new file mode 100644
index 0000000000..2a3c6eaf61
--- /dev/null
+++ b/bsp/k210/images/flash.png
diff --git a/bsp/k210/images/k210.png b/bsp/k210/images/k210.png
new file mode 100644
index 0000000000..2d59f3aa58
--- /dev/null
+++ b/bsp/k210/images/k210.png
diff --git a/bsp/k210/link.lds b/bsp/k210/link.lds
new file mode 100644
index 0000000000..851861f19f
--- /dev/null
+++ b/bsp/k210/link.lds
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+INCLUDE "link_stacksize.lds"
+
+/*
+ * The OUTPUT_ARCH command specifies the machine architecture where the
+ * argument is one of the names used in the Kendryte library.
+ */
+OUTPUT_ARCH( "riscv" )
+
+MEMORY
+{
+   /* 6M SRAM */
+   SRAM : ORIGIN = 0x80000000, LENGTH = 0x600000
+}
+
+ENTRY(_start)
+SECTIONS
+{
+    . = 0x80000000 ;
+
+    /* __STACKSIZE__ = 4096; */
+
+    .start :
+    {
+        *(.start);
+    } > SRAM
+
+    . = ALIGN(4);
+
+    .text : 
+    {
+        *(.text)                        /* remaining code */
+        *(.text.*)                      /* remaining code */
+        *(.rodata)                      /* read-only data (constants) */
+        *(.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);
+
+        . = ALIGN(4);
+        _etext = .;
+    } > SRAM
+
+    .eh_frame_hdr : 
+    { 
+         *(.eh_frame_hdr) 
+         *(.eh_frame_entry)
+    } > SRAM
+    .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) } > SRAM
+
+    . = ALIGN(4);
+
+    .data : 
+    {
+        *(.data)
+        *(.data.*)
+    
+        *(.data1)
+        *(.data1.*)
+
+        . = ALIGN(8);
+        PROVIDE( __global_pointer$ = . + 0x800 );
+
+        *(.sdata)
+        *(.sdata.*)
+    } > SRAM
+
+    /* stack for dual core */
+    .stack :
+    {
+        . = ALIGN(64);
+        __stack_start__ = .;
+
+        . += __STACKSIZE__;
+        __stack_cpu0 = .;
+
+        . += __STACKSIZE__;
+        __stack_cpu1 = .;
+    } > SRAM
+
+    .sbss : 
+    {
+    __bss_start = .;
+        *(.sbss)
+        *(.sbss.*)
+        *(.dynsbss)
+        *(.scommon)
+    } > SRAM
+
+    .bss :
+    {
+        *(.bss)
+        *(.bss.*)
+        *(.dynbss)
+        *(COMMON)
+    __bss_end = .;
+    } > SRAM
+
+    _end = .;
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+     * Symbols in the DWARF debugging sections are relative to the beginning
+     * of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}
diff --git a/bsp/k210/link_stacksize.lds b/bsp/k210/link_stacksize.lds
new file mode 100644
index 0000000000..1dd893422c
--- /dev/null
+++ b/bsp/k210/link_stacksize.lds
@@ -0,0 +1 @@
+__STACKSIZE__ = 4096;
\ No newline at end of file
diff --git a/bsp/k210/rtconfig.h b/bsp/k210/rtconfig.h
new file mode 100644
index 0000000000..629a34f31c
--- /dev/null
+++ b/bsp/k210/rtconfig.h
@@ -0,0 +1,178 @@
+#ifndef RT_CONFIG_H__
+#define RT_CONFIG_H__
+
+/* Automatically generated file; DO NOT EDIT. */
+/* RT-Thread Project Configuration */
+
+/* RT-Thread Kernel */
+
+#define RT_NAME_MAX 8
+#define RT_ALIGN_SIZE 8
+#define RT_THREAD_PRIORITY_32
+#define RT_THREAD_PRIORITY_MAX 32
+#define RT_TICK_PER_SECOND 100
+#define RT_USING_OVERFLOW_CHECK
+#define RT_USING_HOOK
+#define RT_USING_IDLE_HOOK
+#define RT_IDEL_HOOK_LIST_SIZE 4
+#define IDLE_THREAD_STACK_SIZE 1024
+#define RT_DEBUG
+#define RT_DEBUG_INIT_CONFIG
+#define RT_DEBUG_INIT 1
+
+/* 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_MEMPOOL
+#define RT_USING_SMALL_MEM
+#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 "uarths"
+#define RT_VER_NUM 0x40000
+#define ARCH_CPU_64BIT
+#define ARCH_RISCV
+#define ARCH_RISCV64
+
+/* RT-Thread Components */
+
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+#define RT_MAIN_THREAD_STACK_SIZE 8192
+#define RT_MAIN_THREAD_PRIORITY 10
+
+/* C++ features */
+
+
+/* Command shell */
+
+#define RT_USING_FINSH
+#define FINSH_THREAD_NAME "tshell"
+#define FINSH_USING_HISTORY
+#define FINSH_HISTORY_LINES 5
+#define FINSH_USING_SYMTAB
+#define FINSH_USING_DESCRIPTION
+#define FINSH_THREAD_PRIORITY 20
+#define FINSH_THREAD_STACK_SIZE 4096
+#define FINSH_CMD_SIZE 80
+#define FINSH_USING_MSH
+#define FINSH_USING_MSH_DEFAULT
+#define FINSH_USING_MSH_ONLY
+#define FINSH_ARG_MAX 10
+
+/* Device virtual file system */
+
+#define RT_USING_DFS
+#define DFS_USING_WORKDIR
+#define DFS_FILESYSTEMS_MAX 4
+#define DFS_FILESYSTEM_TYPES_MAX 4
+#define DFS_FD_MAX 16
+#define RT_USING_DFS_DEVFS
+
+/* Device Drivers */
+
+#define RT_USING_DEVICE_IPC
+#define RT_PIPE_BUFSZ 512
+#define RT_USING_SERIAL
+#define RT_SERIAL_USING_DMA
+#define RT_USING_PIN
+
+/* Using WiFi */
+
+
+/* Using USB */
+
+
+/* POSIX layer and C standard library */
+
+#define RT_USING_LIBC
+#define RT_USING_POSIX
+
+/* Network */
+
+/* Socket abstraction layer */
+
+
+/* light weight TCP/IP stack */
+
+
+/* Modbus master and slave stack */
+
+
+/* AT commands */
+
+
+/* VBUS(Virtual Software BUS) */
+
+
+/* Utilities */
+
+
+/* RT-Thread online packages */
+
+/* IoT - internet of things */
+
+
+/* Wi-Fi */
+
+/* Marvell WiFi */
+
+
+/* Wiced WiFi */
+
+
+/* IoT Cloud */
+
+
+/* security packages */
+
+
+/* language packages */
+
+
+/* multimedia packages */
+
+
+/* tools packages */
+
+
+/* system packages */
+
+
+/* peripheral libraries and drivers */
+
+#define PKG_USING_KENDRYTE_SDK
+#define PKG_USING_KENDRYTE_SDK_V052
+
+/* miscellaneous packages */
+
+
+/* sample package */
+
+/* samples: kernel and components samples */
+
+
+/* example package: hello */
+
+
+/* Privated Packages of RealThread */
+
+
+/* Network Utilities */
+
+#define BOARD_K210_EVB
+#define BSP_USING_UART_HS
+#define __STACKSIZE__ 4096
+
+#endif
diff --git a/bsp/k210/rtconfig.py b/bsp/k210/rtconfig.py
new file mode 100644
index 0000000000..c2df896f4c
--- /dev/null
+++ b/bsp/k210/rtconfig.py
@@ -0,0 +1,58 @@
+import os
+
+# toolchains options
+ARCH        ='risc-v'
+CPU         ='k210'
+CROSS_TOOL  ='gcc'
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = r'rt-thread'
+
+if os.getenv('RTT_CC'):
+    CROSS_TOOL = os.getenv('RTT_CC')
+
+if  CROSS_TOOL == 'gcc':
+    PLATFORM    = 'gcc'
+    EXEC_PATH   = r'/opt/riscv64-unknown-elf-gcc-2018.07.0-x86_64-linux-ubuntu14/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 = 'release'
+
+if PLATFORM == 'gcc':
+    # toolchains
+    PREFIX  = 'riscv-none-embed-'
+    # PREFIX  = 'riscv64-unknown-elf-'
+    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  = ' -mcmodel=medany'
+    CFLAGS  = DEVICE + ' -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields '
+    AFLAGS  = ' -c' + DEVICE + ' -x assembler-with-cpp'
+    LFLAGS  = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,_start -T link.lds'
+    CPATH   = ''
+    LPATH   = ''
+
+    if BUILD == 'debug':
+        CFLAGS += ' -O0 -ggdb'
+        AFLAGS += ' -ggdb'
+    else:
+        CFLAGS += ' -O2'
+
+    CXXFLAGS = CFLAGS
+
+DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
+POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'