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+# CH32F10X系列BSP移植
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+## 1 工程结构
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++ wch\arm\ch32f103c8-core
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++ wch\arm\Libraries
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++ wch\arm\Libraries\ch32_drivers
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++ wch\arm\Libraries\CH32F10x_StdPeriph_Driver
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++ wch\arm\tools
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+
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+ch32f103c8-core为移植到具体芯片的BSP, Libraries存放的是厂商的驱动库(CH32F10x_StdPeriph_Driver等)和适配rt-thread的驱动(ch32_drivers),
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+tools是在env环境下使用scons --dist所需要的依赖工具
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+
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+### 1.1 已适配rt-thread的驱动(ch32_drivers)：
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+现已支持以下驱动(支持的驱动，使用到的宏开关，需要实现的接口)：
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++ GPIO
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+ + RT_USING_PIN
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++ UART 1/2/3
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+ + RT_USING_SERIAL
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+ + BSP_USING_UART
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+ + BSP_USING_UART1
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+ + BSP_USING_UART2
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+ + BSP_USING_UART3
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+~~~c
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+void ch32f1_usart_clock_and_io_init(USART_TypeDef* usartx);
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+~~~
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++ SPI 1/2
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+ + RT_USING_SPI
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+ + BSP_USING_SPI
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+ + BSP_USING_SPI1
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+ + BSP_USING_SPI2
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+~~~c
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+void ch32f1_spi_clock_and_io_init(SPI_TypeDef* spix);
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+rt_uint32_t ch32f1_spi_clock_get(SPI_TypeDef* spix);
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+~~~
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++ I2C(hardware) 1/2
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+ + RT_USING_I2C
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+ + BSP_USING_HWI2C
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+ + BSP_USING_HWI2C1
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+ + BSP_USING_HWI2C2
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+~~~c
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+void ch32f1_i2c_clock_and_io_init(I2C_TypeDef* i2cx);
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+void ch32f1_i2c_config(I2C_TypeDef* i2cx);
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+~~~
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++ WDT
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+ + RT_USING_WDT
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+ + BSP_USING_IWDT
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+ + LSI_VALUE
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++ RTC
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+ + RT_USING_RTC
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+ + BSP_USING_RTC
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+ + BSP_USING_RTC_LSI
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+ + LSI_VALUE
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++ HWTIMER 1/2/3/4
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+ + RT_USING_HWTIMER
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+ + BSP_USING_HWTIMER
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+ + BSP_USING_TIM1_HWTIMER
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+ + BSP_USING_TIM2_HWTIMER
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+ + BSP_USING_TIM3_HWTIMER
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+ + BSP_USING_TIM4_HWTIMER
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+~~~c
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+void ch32f1_tim_clock_init(TIM_TypeDef *timx);
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+rt_uint32_t ch32f1_tim_clock_get(TIM_TypeDef *timx);
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+~~~
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+~~~c
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+struct rt_hwtimer_info* ch32f1_hwtimer_info_config_get(TIM_TypeDef *timx);
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+~~~
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++ PWM 4(timer) x 4 (channel)
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+ + RT_USING_PWM
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+ + BSP_USING_TIM1_PWM
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+ + BSP_USING_TIM1_PWM_CH1
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+ + BSP_USING_TIM1_PWM_CH2
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+ + BSP_USING_TIM1_PWM_CH3
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+ + BSP_USING_TIM1_PWM_CH4
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+ + BSP_USING_TIM2_PWM
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+ + BSP_USING_TIM2_PWM_CH1
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+ + BSP_USING_TIM2_PWM_CH2
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+ + BSP_USING_TIM2_PWM_CH3
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+ + BSP_USING_TIM2_PWM_CH4
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+ + BSP_USING_TIM3_PWM
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+ + BSP_USING_TIM3_PWM_CH1
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+ + BSP_USING_TIM3_PWM_CH2
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+ + BSP_USING_TIM3_PWM_CH3
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+ + BSP_USING_TIM3_PWM_CH4
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+ + BSP_USING_TIM4_PWM
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+ + BSP_USING_TIM4_PWM_CH1
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+ + BSP_USING_TIM4_PWM_CH2
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+ + BSP_USING_TIM4_PWM_CH3
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+ + BSP_USING_TIM4_PWM_CH4
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+~~~c
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+void ch32f1_pwm_io_init(TIM_TypeDef *timx, rt_uint8_t channel);
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+~~~
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+其中需要依赖定时器的接口：
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+~~~c
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+void ch32f1_tim_clock_init(TIM_TypeDef *timx);
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+rt_uint32_t ch32f1_tim_clock_get(TIM_TypeDef *timx);
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+~~~
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+
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+
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+### 1.2 需要实现的接口：
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+除了使用上面驱动提及的接口外，以下的接口必须实现：
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+~~~c
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+rt_uint32_t ch32_get_sysclock_frequency(void);
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+~~~
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+## 2 构建具体芯片BSP
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+以ch32f103c8-core为例，在ENV环境下，使用MDK，至少需要准备
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++ ch32f103c8-core (具体的BSP名)
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++ ch32f103c8-core\applications
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++ ch32f103c8-core\applications\SConscript
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++ ch32f103c8-core\applications\main.c
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++ ch32f103c8-core\board
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++ ch32f103c8-core\board\linker_scripts
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++ ch32f103c8-core\board\linker_scripts\link.sct
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++ ch32f103c8-core\board\board.c
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++ ch32f103c8-core\board\board.h
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++ ch32f103c8-core\board\ch32f10x_conf.h
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++ ch32f103c8-core\board\system_ch32f10x.c
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++ ch32f103c8-core\board\Kconfig
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++ ch32f103c8-core\board\SConscript
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++ ch32f103c8-core\Kconfig
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++ ch32f103c8-core\rtconfig.py
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++ ch32f103c8-core\SConscript
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++ ch32f103c8-core\SConstruct
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++ ch32f103c8-core\template.uvprojx
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+
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+### 2.1 创建template.uvprojx
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+新建名为template的MDK工程，删除多余的子目录target1，将目录改名为rtthread-ch32f103x，options选项栏device设置具体芯片，user编译后的动作, 如"fromelf --bin !L --output rtthread.bin"
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+
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+### 2.2 编写board/Kconfig
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+
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+~~~
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+menu "Hardware Drivers Config"
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+
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+config SOC_CH32F103C8
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+ bool
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+ select SOC_ARM_SERIES_CH32F103
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+ select RT_USING_COMPONENTS_INIT
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+ select RT_USING_USER_MAIN
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+ default y
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+~~~
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+SOC_CH32F103C8为具体的芯片，SOC_ARM_SERIES_CH32F103在Libraries\Kconfig下已定义。
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+RT_USING_COMPONENTS_INIT，RT_USING_USER_MAIN为rt-thread设备框架默认选项。
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+
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+
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+使用适配的驱动根据宏开关编写即可，以串口驱动为例：
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++ BSP_USING_XXX
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+ + select RT_USING_XXX
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+ + BSP_USING_XXX1
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+ + BSP_USING_XXX2
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+
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+~~~
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+menu "On-chip Peripheral Drivers"
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+
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+config BSP_USING_UART
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+ bool "using onchip usart"
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+ select RT_USING_SERIAL
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+ default n
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+
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+ if BSP_USING_UART
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+ config BSP_USING_UART1
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+ bool "using uart1"
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+ default n
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+
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+ config BSP_USING_UART2
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+ bool "using uart2"
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+ default n
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+
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+ config BSP_USING_UART3
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+ bool "using uart3"
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+ default n
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+ endif
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+~~~
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+
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+比较特殊的定时器和PWM驱动额外定义了以下宏开关，详见ch32f103c8-core。
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++ BSP_USING_TIM
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+ + BSP_USING_TIM1
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+ + BSP_USING_TIM2
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+ + BSP_USING_TIM3
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+ + BSP_USING_TIM4
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+### 2.3 在board/board.h加入接口，并在board/board.c实现
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+使用适配的驱动根据宏开关编写即可,如串口驱动：
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++ BSP_USING_XXX
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+~~~
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+#ifdef BSP_USING_UART
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+void ch32f1_usart_clock_and_io_init(USART_TypeDef* usartx);
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+#endif
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+~~~
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+比较特殊的定时器和PWM驱动使用额外定义了的宏开关
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+~~~c
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+#ifdef BSP_USING_TIM
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+void ch32f1_tim_clock_init(TIM_TypeDef *timx);
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+rt_uint32_t ch32f1_tim_clock_get(TIM_TypeDef *timx);
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+
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+#ifdef BSP_USING_HWTIMER
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+struct rt_hwtimer_info* ch32f1_hwtimer_info_config_get(TIM_TypeDef *timx);
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+#endif
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+
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+#ifdef BSP_USING_PWM
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+void ch32f1_pwm_io_init(TIM_TypeDef *timx, rt_uint8_t channel);
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+#endif
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+#endif
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+~~~
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charlown