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253 lines
10 KiB
Markdown
253 lines
10 KiB
Markdown
# 芯来科技RVSTAR开发板 #
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## 简介
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**RVSTAR开发板** 是由芯来科技公司推出的基于采用芯来科技RISC-V架构处理器芯片的GD32VF103的开发板。
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更多关于 **RVSTAR开发板** 开发板的详细资料请参见 [RVSTAR开发板快速入门](https://www.rvmcu.com/quickstart-quickstart-index-u-RV_STAR.html)
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### 板载资源
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| 硬件 | 描述 |
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| --- | --- |
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| 内核 | Nuclei N205 |
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| 架构 | 32-bit RV32IMAC |
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| 主频 | 108 MHz |
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## 工具安装
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### 安装工具链
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请根据[安装Nuclei RISC-V GCC Toolchain和OpenOCD](https://doc.nucleisys.com/nuclei_sdk/quickstart.html#setup-tools-and-environment) 来安装依赖的工具。
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### 添加环境变量
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将Nuclei RISC-V GCC Toolchain和OpenOCD的环境变量进行设置。
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#### Windows
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假设工具安装在 **D:\Software\Nuclei**目录下, 则可以修改系统环境变量**PATH**,
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将**D:\Software\Nuclei\gcc\bin;D:\Software\Nuclei\openocd\bin;**增加到**PATH**中。
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或者在ENV工具命令行中运行
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~~~cmd
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set PATH=D:\Software\Nuclei\gcc\bin;D:\Software\Nuclei\openocd\bin;%PATH%
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~~~
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#### Linux
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假设工具安装在 **~/Software/Nuclei**目录下, 通过在Linux的``.bashrc``增加如下一行代码
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来添加环境变量。
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~~~bash
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export PATH=~/Software/Nuclei/gcc/bin:~/Software/Nuclei/openocd/bin:$PATH
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~~~
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或者在ENV工具命令行中运行
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~~~bash
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export PATH=~/Software/Nuclei/gcc/bin:~/Software/Nuclei/openocd/bin:$PATH
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~~~
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**注意**: 对应的RISC-V GCC和OPENOCD的路径请替换成自己安装的路径。
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## 烧写及执行
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### [驱动设置](https://doc.nucleisys.com/nuclei_board_labs/hw/hw.html#on-board-debugger-driver)
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### 编译程序
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下载好[RT-Thread](https://github.com/RT-Thread/rt-thread)的代码和[ENV工具](https://www.rt-thread.org/document/site/tutorial/env-video/)以后。
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按照ENV工具的教程, 在**rt-thread\bsp\nuclei\gd32vf103_rvstar**目录打开ENV工具命令行。
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**注意**: 请确保Nuclei GCC和Nuclei OpenOCD的路径设置正确无误。
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1. 运行 ``pkgs --update``来下载最新的依赖的**Nuclei SDK**开发包
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2. **可选**: 运行 ``menuconfig``来进行内核配置
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3. 运行 ``scons -c``清理之前的编译结果
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4. 运行 ``scons``来进行代码的编译
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### 下载程序
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在保证程序能够正常编译后, 在相同ENV终端执行``scons --run upload``进行代码的下载。
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正常下载的输出如下:
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~~~
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scons: Reading SConscript files ...
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Supported downloaded modes for board gd32vf103v_rvstar are flashxip, chosen downloaded mode is flashxip
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Upload application rtthread.elf using openocd and gdb
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riscv-nuclei-elf-gdb rtthread.elf -ex "set remotetimeout 240" -ex "target remote | openocd --pipe -f D:/workspace/Sourcecode/rt-thread/bsp/nuclei/gd32vf103_rvstar/packages/nuclei_sdk-latest/SoC/gd32vf103/Board/gd32vf103v_rvstar/openocd_gd32vf103.cfg" --batch -ex "monitor halt" -ex "monitor flash protect 0 0 last off" -ex "load" -ex "monitor resume" -ex "monitor shutdown" -ex "quit"
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D:\Software\Nuclei\gcc\bin\riscv-nuclei-elf-gdb.exe: warning: Couldn't determine a path for the index cache directory.
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Nuclei OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev-00014-g0eae03214 (2019-12-12-07:43)
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Licensed under GNU GPL v2
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For bug reports, read
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http://openocd.org/doc/doxygen/bugs.html
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rt_thread_idle_entry (parameter=0x0) at D:\workspace\Sourcecode\rt-thread\src\idle.c:251
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251 if (idle_hook_list[i] != RT_NULL)
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cleared protection for sectors 0 through 127 on flash bank 0
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Loading section .init, size 0x264 lma 0x8000000
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Loading section .text, size 0x140de lma 0x8000280
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Loading section .rodata, size 0x37c0 lma 0x8014360
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Loading section .data, size 0x404 lma 0x8017b20
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Start address 0x800015c, load size 98054
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Transfer rate: 8 KB/sec, 10894 bytes/write.
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shutdown command invoked
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A debugging session is active.
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Inferior 1 [Remote target] will be detached.
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Quit anyway? (y or n) [answered Y; input not from terminal]
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Remote communication error. Target disconnected.: Success.
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~~~
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下载程序之后, 连接串口(115200-N-8-1), 可以看到 RT-Thread 的输出信息：
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```
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initialize rti_board_start:0 done
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\ | /
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- RT - Thread Operating System
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/ | \ 4.0.3 build Apr 9 2020
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2006 - 2020 Copyright by rt-thread team
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do components initialization.
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initialize rti_board_end:0 done
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initialize dfs_init:0 done
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initialize libc_system_init:0 done
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initialize finsh_system_init:0 done
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msh />
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```
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在串口终端(我这里使用的是TeraTerm)输入``ps``即可查看当前线程工作情况:
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~~~
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msh />ps
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thread pri status sp stack size max used left tick error
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-------- --- ------- ---------- ---------- ------ ---------- ---
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thread01 19 suspend 0x00000158 0x0000018c 87% 0x00000005 000
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thread00 19 suspend 0x00000158 0x0000018c 87% 0x00000005 000
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tshell 20 running 0x00000258 0x00001000 18% 0x00000004 000
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tidle0 31 ready 0x000000a8 0x0000018c 59% 0x0000000e 000
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timer 4 suspend 0x000000f8 0x00000200 49% 0x00000009 000
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main 10 suspend 0x00000168 0x00000800 36% 0x00000006 000
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msh />
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~~~
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### 调试程序
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在保证程序编译成功后, 在相同ENV终端执行``scons --run debug``进行代码在命令行下进行GDB调试。
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正常的调试输出如下：
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~~~
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scons: Reading SConscript files ...
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Supported downloaded modes for board gd32vf103v_rvstar are flashxip, chosen downloaded mode is flashxip
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Debug application rtthread.elf using openocd and gdb
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riscv-nuclei-elf-gdb rtthread.elf -ex "set remotetimeout 240" -ex "target remote | openocd --pipe -f D:/workspace/Sourcecode/rt-thread/bsp/nuclei/gd32vf103_rvstar/packages/nuclei_sdk-latest/SoC/gd32vf103/Board/gd32vf103v_rvstar/openocd_gd32vf103.cfg"
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D:\Software\Nuclei\gcc\bin\riscv-nuclei-elf-gdb.exe: warning: Couldn't determine a path for the index cache directory.
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GNU gdb (GDB) 8.3.0.20190516-git
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Copyright (C) 2019 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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Type "show copying" and "show warranty" for details.
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This GDB was configured as "--host=i686-w64-mingw32 --target=riscv-nuclei-elf".
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Type "show configuration" for configuration details.
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/gdb/bugs/>.
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Find the GDB manual and other documentation resources online at:
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<http://www.gnu.org/software/gdb/documentation/>.
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For help, type "help".
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Type "apropos word" to search for commands related to "word"...
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Reading symbols from rtthread.elf...
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Remote debugging using | openocd --pipe -f D:/workspace/Sourcecode/rt-thread/bsp/nuclei/gd32vf103_rvstar/packages/nuclei_sdk-latest/SoC/gd32vf103/Board/gd32vf103v_rvstar/openocd_gd32vf103.cfg Nuclei OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev-00014-g0eae03214 (2019-12-12-07:43)
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Licensed under GNU GPL v2
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For bug reports, read
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http://openocd.org/doc/doxygen/bugs.html
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rt_thread_idle_entry (parameter=0x0) at D:\workspace\Sourcecode\rt-thread\src\idle.c:249
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249 for (i = 0; i < RT_IDLE_HOOK_LIST_SIZE; i++)
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(gdb)
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(gdb) b main.c:35
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Breakpoint 1 at 0x8000290: file applications\main.c, line 35.
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(gdb) c
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Continuing.
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Note: automatically using hardware breakpoints for read-only addresses.
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Breakpoint 1, thread_entry (parameter=0x0) at applications\main.c:35
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35 rt_thread_mdelay(500);
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(gdb)
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~~~
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调试例子参见如下文档:
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* https://doc.nucleisys.com/nuclei_sdk/quickstart.html#debug-application
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为了更方便的进行调试, 也可以下载**Nuclei Studio**集成开发环境, 创建一个Debug Configuration, 选择编译好的
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ELF文件, 然后配置OPENOCD和GDB即可, OPENOCD配置文件路径为**bsp\nuclei\gd32vf103_rvstar\packages\nuclei_sdk-latest\SoC\gd32vf103\Board\gd32vf103v_rvstar\openocd_gd32vf103.cfg**
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## 驱动支持情况
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| 驱动 | 支持情况 | 备注 |
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| ------ | ---- | :------: |
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| UART | 支持 | RV-STAR板载串口是UART4, 默认使能 |
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| GPIO | 支持 | 默认使能，支持中断控制 |
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| SPI | 支持 | 默认关闭 |
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| I2C | 支持 | 默认关闭 |
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| HWTIMER | 支持 | 默认关闭 |
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| PWM | 支持 | 默认关闭 |
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| WDT | 支持 | 默认关闭 |
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| RTC | 支持 | 默认关闭 |
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| ADC | 支持 | 默认关闭 |
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### 适配开发板Pinmux
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如果需要使用到其他的外设驱动，则首先需要运行`menuconfig`命令，在
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`Hardware Drivers Config -> On-chip Peripheral Drivers`中使能对应的外设接口，
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但是由于针对不同的外设接口GPIO的pinux配置不一样，开发者仍需要根据自己的需求
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在 `board/board.c` 中的 `rt_hw_drivers_init`入口函数中找到需要使用到的子函数，
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并在对应的子函数中进行功能适配。
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**使用举例**
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* I2C外设Pinmux
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如果需要将I2C1的SCL和SDA配置在PB10和PB11，首先需要在menuconfig中将I2C1使能，然后
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更改board.c中`rt_hw_i2c_drvinit`函数，并进行如下设定。
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~~~c
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/* Configure PB10 PB11 (I2C1 SCL SDA) as alternate function */
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gpio_init(GPIOB, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_10 | GPIO_PIN_11);
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~~~
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* SPI外设Pinmux
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如果需要将SPI0的SCK MISO和MOSI配置在PA5, PA6和PA7，首先需要在menuconfig中将SPI0使能，
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然后更改board.c中的`rt_hw_spi_drvinit`函数，并进行如下设定。
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~~~c
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/* Configure PA5 PA6 PA7 (SPI0 SCK MISO MOSI) as alternate function */
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gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_5 | GPIO_PIN_7);
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gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_6);
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~~~
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* 其余类似的外设也是如上做适配处理
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### 注意
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- 适配RT-Thread的驱动框架的代码在 [../libraries/gd32vf103/HAL_Drivers](../libraries/gd32vf103/HAL_Drivers)目录下。
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- 如果有开发者想适配更多的驱动, 请在对应目录下增加驱动适配支持。
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- GD32VF103的驱动适配开关在 `menuconfig -> Hardware Drivers Config -> On-chip Peripheral Drivers` 可以找到。
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- HWTIMER和PWM都是采用的TIMER模块进行功能实现，所以在使用驱动时，请务必注意不要重叠使用相同模块。
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## 联系人信息
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维护人：
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- [fanghuaqi](https://github.com/fanghuaqi)
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