update GD32E23x.svd

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.28)
 include(cmake/toolchain.cmake)
 
-project(gd32e23_template)
+project(gd32e23x_template)
 
 enable_language(C)
 enable_language(CXX)
@@ -10,7 +10,7 @@ enable_language(ASM)
 # Use custom startup.S
 set(TARGET_STARTUP_ASM ${CMAKE_SOURCE_DIR}/startup/startup_gd32e23x.S)
 # Use custom linker script
-set(TARGET_LD_SCRIPT ${CMAKE_SOURCE_DIR}/ld/gd_e230f4_gcc.ld)
+set(TARGET_LD_SCRIPT ${CMAKE_SOURCE_DIR}/ld/gd32e23x_gcc.ld)
 # Add GD SDK
 add_subdirectory(sdk)
 
@@ -18,14 +18,14 @@ set(TARGET_C_SRC
         ${CMAKE_SOURCE_DIR}/src/main.c
         ${CMAKE_SOURCE_DIR}/src/gd32e23x_it.c
         ${CMAKE_SOURCE_DIR}/src/systick.c
-        ${CMAKE_SOURCE_DIR}/src/wc_bldc_control.c
+        ${CMAKE_SOURCE_DIR}/src/peripheral.c
 )
 
-add_executable(gd32e23_template ${TARGET_C_SRC})
+add_executable(gd32e23x_template ${TARGET_C_SRC})
 
-target_link_libraries(gd32e23_template GD32E23X_SDK)
+target_link_libraries(gd32e23x_template GD32E23X_SDK)
-target_include_directories(gd32e23_template PUBLIC inc)
+target_include_directories(gd32e23x_template PUBLIC inc)
 
 # Generate .bin and .hex
-generate_binary_file(gd32e23_template)
+generate_binary_file(gd32e23x_template)
-generate_hex_file(gd32e23_template)
+generate_hex_file(gd32e23x_template)

README.md

@@ -1,2 +1,63 @@
-# gd32_temp
+# gd32e23x_template
-from mo10
+本项目为GD32E230Fx系列的基于Clion的CMake开发的工程模板。本人暂未入门，强行上强度，放弃keil，拥抱开源。遂尝试使用arm-none-eabi-gcc进行开发。
+有幸寻得[@mo10 ](https://github.com/mo10)大佬的帮助，本项目的基础目录架构与CMakeLists.txt与toolchain.cmake均为大佬提供。
+
+## 关于C标准库的printf的重写
+在Keil开发中，ARMClang有自己的microLIB，所以直接调用，然后重写fputc函数即可，但在gcc中需要重写`_write`函数，本项目模板中已经在`main.c`中完成重写。
+同时需要添加`--spaces=nano.spaces`编译参数。
+但是printf本身占用flash比较大，建议谨慎使用，尤其是本项目搭建时候采用的型号为`GD32E230F4V6`内存非常有限，重写后加上spaces设置，目前能用。
+
+## 添加源文件与头文件
+在`ProjectDir/CMakeLists.txt`中21行左右，添加对应源文件即可。
+
+```cmake
+set(TARGET_C_SRC
+        ${CMAKE_SOURCE_DIR}/src/main.c
+        ${CMAKE_SOURCE_DIR}/src/gd32e23x_it.c
+        ${CMAKE_SOURCE_DIR}/src/systick.c
+        ${CMAKE_SOURCE_DIR}/src/peripheral.c
+)
+```
+## 关于链接脚本
+注意芯片选型, 不同型号的芯片 FLASH 和 RAM 大小不同。需要修改链接脚本`ld/gd32e23x_gcc.ld`
+
+| 芯片型号       | FLASH | RAM |
+|------------|-------|-----|
+| GD32E230F4 | 16K   | 4K  |
+| GD32E230F8 | 64K   | 8K  |
+
+```linkerscript
+/* memory map */
+MEMORY
+{
+FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 16K
+RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 4K
+}
+```
+
+## 关于Startup文件
+
+[@mo10 ](https://github.com/mo10)大佬提供的一些想法，具体如下。但是我目前还没测试到实际的影响和作用范围，所以暂未同步进来，仅作为备忘内容
+```asm
+Reset_Handler:
+    ldr   r0, =_sp
+    mov   sp, r0
+    ldr   r0, =_end
+    msr   msplim, r0
+/* copy the data segment into ram */
+    movs  r1, #0
+    b  LoopCopyDataInit
+```
+
+
+## Ref
+
+1. 参考LD/Startup
+
+[https://github.com/Noveren/gd32e23x-template/blob/main/gd32e23x/template/linker.ld](https://github.com/Noveren/gd32e23x-template/blob/main/gd32e23x/template/linker.ld)
+
+[https://github.com/Noveren/gd32e23x-template/blob/main/gd32e23x/template/startup.s](https://github.com/Noveren/gd32e23x-template/blob/main/gd32e23x/template/startup.s)
+
+2. 官方LD/Startup
+
+使用Embedded Builder工具生成的C标准库生成的模板

cmake/toolchain.cmake

@@ -105,4 +105,5 @@ set(CMAKE_ASM_FLAGS_RELEASE      "-DNDEBUG -O3") #  -flto
 set(CMAKE_C_FLAGS          "${CMAKE_C_FLAGS} ${TARGET_CFLAGS_HARDWARE} ${TARGET_CFLAGS_EXTRA}")
 set(CMAKE_CXX_FLAGS        "${CMAKE_CXX_FLAGS} ${TARGET_CFLAGS_HARDWARE} ${TARGET_CXXFLAGS_EXTRA}")
 set(CMAKE_ASM_FLAGS        "${CMAKE_ASM_FLAGS} ${CMAKE_C_FLAGS} -x assembler-with-cpp")
-set(CMAKE_EXE_LINKER_FLAGS "-specs=nosys.specs -Wl,--gc-sections ${TARGET_LDFLAGS_EXTRA}")
+set(CMAKE_EXE_LINKER_FLAGS "--specs=nano.specs --specs=nosys.specs -Wall -Wextra -Wl,--gc-sections ${TARGET_LDFLAGS_EXTRA}")
+# -fsigned-char maybe

inc/peripheral.h

@@ -0,0 +1,11 @@
+//
+// Created by yelv1 on 24-9-22.
+//
+
+#ifndef PERIPHERAL_H
+#define PERIPHERAL_H
+
+void usart_config(void);
+void led_blink_config(void);
+
+#endif //PERIPHERAL_H

inc/wc_bldc_control.h

@@ -1,57 +0,0 @@
-//
-// Created by dell on 24-9-20.
-//
-
-#ifndef WC_BLDC_CONTROL_H
-#define WC_BLDC_CONTROL_H
-
-#include "gd32e23x.h"
-
-#define RS485_GPIO_RCU RCU_GPIOA
-#define RS485_COM_RCU  RCU_USART0
-#define RS485_PORT     GPIOA
-#define RS485_DI_PIN   GPIO_PIN_2
-#define RS485_RO_PIN   GPIO_PIN_3
-#define RS485_RE_PIN   GPIO_PIN_4
-#define RS485_COM      USART0
-
-#define GPIO_PORT_SPEED_CTRL     GPIOA
-#define GPIO_PIN_SPEED_CTRL      GPIO_PIN_10
-
-#define GPIO_PORT_SPEED_FB       GPIOA
-#define GPIO_PIN_SPEED_FB        GPIO_PIN_9
-
-#define GPIO_PORT_DRV_ENABLE     GPIOF
-#define GPIO_PIN_DRV_ENABLE      GPIO_PIN_1
-
-#define GPIO_PORT_MOTOR_DIR      GPIOF
-#define GPIO_PIN_MOTOR_DIR       GPIO_PIN_0
-
-#define RCU_SPEED_CTL            RCU_GPIOA
-#define RCU_SPEED_FB             RCU_GPIOA
-#define RCU_DRV_ENABLE           RCU_GPIOF
-#define RCU_MOTOR_DIR            RCU_GPIOF
-
-#define TIMER_SPEED_CTL          TIMER0
-#define TIMER_CH_SPEED_CTL       TIMER_CH_2
-#define RCU_TIMER_SPEED_CTL      RCU_TIMER0
-
-void led_blink_config(void);
-
-
-
-/* configure RS485 port & RE/DE Pin */
-void rs485_com_config(void);
-/* Set transmit enabel */
-void rs485_transmit_enable(void);
-/* Set receive enabel */
-void rs485_receive_enable(void);
-
-void bldc_set_pwm(uint8_t pwm);
-void bldc_config(void);
-void bldc_enable_set(bit_status status);
-
-
-void timer2_config(void);
-
-#endif //WC_BLDC_CONTROL_H

ld/gd32e23x_gcc.ld

@@ -34,7 +34,7 @@ SECTIONS
     KEEP (*(.fini))
 
     . = ALIGN(4);
-    /* the symbol <EFBFBD><EFBFBD>_etext<EFBFBD><EFBFBD> will be defined at the end of code section */
+    /* the symbol '_etext' will be defined at the end of code section */
     _etext = .;
   } >FLASH
 
@@ -87,26 +87,26 @@ SECTIONS
   .data :
   {
     . = ALIGN(4);
-    /* the symbol <EFBFBD><EFBFBD>_sdata<EFBFBD><EFBFBD> will be defined at the data section end start */
+    /* the symbol '_sdata' will be defined at the data section end start */
     _sdata = .;
     *(.data)
     *(.data*)
     . = ALIGN(4);
-    /* the symbol <EFBFBD><EFBFBD>_edata<EFBFBD><EFBFBD> will be defined at the data section end */
+    /* the symbol '_edata' will be defined at the data section end */
     _edata = .;
   } >RAM AT> FLASH
 
   . = ALIGN(4);
   .bss :
   {
-    /* the symbol <EFBFBD><EFBFBD>_sbss<EFBFBD><EFBFBD> will be defined at the bss section start */
+    /* the symbol '_sbss' will be defined at the bss section start */
     _sbss = .;
     __bss_start__ = _sbss;
     *(.bss)
     *(.bss*)
     *(COMMON)
     . = ALIGN(4);
-    /* the symbol <EFBFBD><EFBFBD>_ebss<EFBFBD><EFBFBD> will be defined at the bss section end */
+    /* the symbol '_ebss' will be defined at the bss section end */
     _ebss = .;
     __bss_end__ = _ebss;
   } >RAM

src/main.c

@@ -1,18 +1,16 @@
 /*!
     \file    main.c
     \brief   led spark with systick, USART print and key example
-    
+
     \version 2024-02-22, V2.1.0, firmware for GD32E23x
 */
-
 #include "main.h"
 #include <stdio.h>
 #include "gd32e23x.h"
 #include "systick.h"
-
 #include "gd32e23x_libopt.h"
 
-#include "wc_bldc_control.h"
+#include "peripheral.h"
 
 /*!
     \brief      main function
@@ -20,31 +18,29 @@
     \param[out] none
     \retval     none
 */
-
 int main(void)
 {
     /* configure systick */
     systick_config();
-
+    usart_config();
-    // led_config();
     led_blink_config();
 
-    rs485_com_config();
-
-    bldc_config();
-    bldc_set_pwm(80);
     delay_ms(5000);
-    bldc_enable_set(SET);
+    printf("system start!\r\n");
 
     while(1){
-
+    printf("hello world!\r\n");
+    delay_ms(5000);
     }
 }
 
 /* retarget the C library printf function to the USART */
-int fputc(int ch, FILE *f)
+int _write (int fd, char *pBuffer, int size)
 {
-    usart_data_transmit(USART0, (uint8_t)ch);
+    for (int i = 0; i < size; i++)
-    while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
+    {
-    return ch;
+        usart_data_transmit(USART0, (uint8_t)pBuffer[i]);
+        while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
+    }
+    return size;
 }

src/peripheral.c

@@ -0,0 +1,63 @@
+//
+// Created by yelv1 on 24-9-22.
+//
+#include "peripheral.h"
+#include "gd32e23x.h"
+
+void usart_config(void)
+{
+    rcu_periph_clock_enable(RCU_GPIOA);
+    rcu_periph_clock_enable(RCU_USART0);
+
+    gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_3);
+    gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2);
+
+    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_3);
+    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_3);
+    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2);
+    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_2);
+
+    usart_deinit(USART0);
+    usart_baudrate_set(USART0, 115200U);
+    usart_receive_config(USART0, USART_RECEIVE_ENABLE);
+    usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
+
+    usart_enable(USART0);
+
+    gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_4);
+    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_4);
+
+    gpio_bit_write(GPIOA, GPIO_PIN_4, SET);
+}
+
+/*!
+    \brief      led blink configuration
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void led_blink_config(void)
+{
+    rcu_periph_clock_enable(RCU_GPIOB);
+
+    gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_1);
+    gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
+    gpio_bit_write(GPIOB, GPIO_PIN_1, SET);
+
+    rcu_periph_clock_enable(RCU_TIMER13);
+    timer_deinit(RCU_TIMER13);
+
+    timer_parameter_struct timer_initpara;
+    timer_struct_para_init(&timer_initpara);
+    timer_initpara.prescaler        =7199;
+    timer_initpara.alignedmode      =TIMER_COUNTER_EDGE;
+    timer_initpara.counterdirection =TIMER_COUNTER_UP;
+    timer_initpara.period           =999;
+    timer_initpara.clockdivision    =TIMER_CKDIV_DIV1;
+    timer_init(TIMER13, &timer_initpara);
+
+    timer_auto_reload_shadow_enable(TIMER13);
+    timer_interrupt_enable(TIMER13, TIMER_INT_UP);
+    nvic_irq_enable(TIMER13_IRQn, 0);
+    timer_enable(TIMER13);
+}

src/wc_bldc_control.c

@@ -1,227 +0,0 @@
-//
-// Created by dell on 24-9-20.
-//
-
-#include "wc_bldc_control.h"
-#include "gd32e23x.h"
-
-/*!
-    \brief      led blink configuration
-    \param[in]  none
-    \param[out] none
-    \retval     none
-*/
-void led_blink_config(void){
-    rcu_periph_clock_enable(RCU_GPIOB);
-
-    gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_1);
-    gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
-    gpio_bit_write(GPIOB, GPIO_PIN_1, SET);
-
-    rcu_periph_clock_enable(RCU_TIMER13);
-    timer_deinit(RCU_TIMER13);
-
-    timer_parameter_struct timer_initpara;
-    timer_struct_para_init(&timer_initpara);
-    timer_initpara.prescaler        =7199;
-    timer_initpara.alignedmode      =TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection =TIMER_COUNTER_UP;
-    timer_initpara.period           =999;
-    timer_initpara.clockdivision    =TIMER_CKDIV_DIV1;
-    timer_init(TIMER13, &timer_initpara);
-
-    timer_auto_reload_shadow_enable(TIMER13);
-    timer_interrupt_enable(TIMER13, TIMER_INT_UP);
-    nvic_irq_enable(TIMER13_IRQn, 0);
-    timer_enable(TIMER13);
-}
-
-/*!
-    \brief      configure RS485 port & RE/DE Pin
-    \param[in]  none
-    \param[out] none
-    \retval     none
-*/
-void rs485_com_config(void)
-{
-    rcu_periph_clock_enable(RS485_GPIO_RCU);
-    rcu_periph_clock_enable(RS485_COM_RCU);
-
-    gpio_af_set(RS485_PORT, GPIO_AF_1, RS485_RO_PIN | RS485_DI_PIN);
-
-    /* configure USART Tx as alternate function push-pull */
-    gpio_mode_set(RS485_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_DI_PIN);
-    gpio_output_options_set(RS485_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, RS485_DI_PIN);
-
-    gpio_mode_set(RS485_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_RO_PIN);
-    gpio_output_options_set(RS485_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, RS485_RO_PIN);
-
-    /* USART configure */
-    usart_deinit(RS485_COM);
-    usart_baudrate_set(RS485_COM, 115200U);
-    usart_receive_config(RS485_COM, USART_RECEIVE_ENABLE);
-    usart_transmit_config(RS485_COM, USART_TRANSMIT_ENABLE);
-
-    usart_enable(RS485_COM);
-
-    gpio_mode_set(RS485_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RS485_RE_PIN);
-    gpio_output_options_set(RS485_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_RE_PIN);
-
-    gpio_bit_write(RS485_PORT, RS485_RE_PIN, SET);
-}
-
-void rs485_transmit_enable(void)
-{
-    gpio_bit_write(RS485_PORT, RS485_RE_PIN, SET);
-}
-
-void rs485_receive_enable(void)
-{
-    gpio_bit_write(RS485_PORT, RS485_RE_PIN, RESET);
-}
-
-uint8_t speed_pwm = 0;   //bldc default pwm is 30
-
-void bldc_set_pwm(uint8_t pwm)
-{
-    if (pwm > 0 && pwm <= 100)
-    {
-        speed_pwm = pwm;
-        timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_2, 12*speed_pwm);
-    }
-}
-
-void bldc_config(void)
-{
-    rcu_periph_clock_enable(RCU_SPEED_CTL | RCU_SPEED_FB);
-    rcu_periph_clock_enable(RCU_DRV_ENABLE | RCU_MOTOR_DIR);
-
-    /* ------------------------------
-    -----BLDC speed control GPIO-----
-    -----GPIOA_10               -- */
-    gpio_mode_set(GPIO_PORT_SPEED_CTRL, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_SPEED_CTRL);
-    gpio_output_options_set(GPIO_PORT_SPEED_CTRL, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_SPEED_CTRL);
-    gpio_af_set(GPIO_PORT_SPEED_CTRL, GPIO_AF_2, GPIO_PIN_SPEED_CTRL);
-
-    /* ------------------------------
-    -----BLDC speed report GPIO------
-    -----GPIOA_9               --- */
-    // gpio_mode_set(GPIO_PORT_SPEED_FB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_SPEED_FB);
-    // gpio_output_options_set(GPIO_PORT_SPEED_FB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_SPEED_FB);
-    // gpio_af_set(GPIO_PORT_SPEED_FB, GPIO_AF_2, GPIO_PIN_SPEED_FB);
-
-    /* ------------------------------
-    -----BLDC enable GPIO------------
-    -----GPIOF_1         --------- */
-    gpio_mode_set(GPIO_PORT_DRV_ENABLE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_DRV_ENABLE);
-    gpio_output_options_set(GPIO_PORT_DRV_ENABLE, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_DRV_ENABLE);
-    gpio_bit_reset(GPIO_PORT_DRV_ENABLE, GPIO_PIN_DRV_ENABLE);
-
-    /* ------------------------------
-    -----BLDC forward/reverse GPIO---
-    -----GPIOF_0                  ---
-    -----no need control for      ---
-    -----                WM7040-24V*/
-    gpio_mode_set(GPIO_PORT_MOTOR_DIR, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_MOTOR_DIR);
-    gpio_output_options_set(GPIO_PORT_MOTOR_DIR, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_MOTOR_DIR);
-    gpio_bit_set(GPIO_PORT_MOTOR_DIR, GPIO_PIN_MOTOR_DIR);
-
-    // gpio_bit_write(GPIOA, GPIO_PIN_10, RESET);
-
-    timer_parameter_struct    timer_initpara;
-    timer_oc_parameter_struct timer_ocinitpara;
-    // timer_ic_parameter_struct timer_icinitpara;
-
-    rcu_periph_clock_enable(RCU_TIMER_SPEED_CTL);
-    timer_deinit(TIMER_SPEED_CTL);
-
-    timer_struct_para_init(&timer_initpara);
-    timer_initpara.prescaler          =59;
-    timer_initpara.alignedmode        =TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection   =TIMER_COUNTER_UP;
-    timer_initpara.period             =1199;
-    timer_initpara.clockdivision      =TIMER_CKDIV_DIV1;
-    timer_init(TIMER_SPEED_CTL, &timer_initpara);
-
-    timer_channel_output_struct_para_init(&timer_ocinitpara);
-    timer_ocinitpara.outputstate  =TIMER_CCX_ENABLE;
-    timer_ocinitpara.outputnstate =TIMER_CCXN_DISABLE;
-    timer_ocinitpara.ocpolarity   =TIMER_OC_POLARITY_HIGH;
-    timer_ocinitpara.ocnpolarity  =TIMER_OCN_POLARITY_HIGH;
-    timer_ocinitpara.ocidlestate  =TIMER_OC_IDLE_STATE_LOW;
-    timer_ocinitpara.ocnidlestate =TIMER_OCN_IDLE_STATE_LOW;
-    timer_channel_output_config(TIMER_SPEED_CTL, TIMER_CH_SPEED_CTL, &timer_ocinitpara);
-
-    timer_channel_output_pulse_value_config(TIMER_SPEED_CTL, TIMER_CH_SPEED_CTL, 12* speed_pwm);
-    timer_channel_output_mode_config(TIMER_SPEED_CTL, TIMER_CH_SPEED_CTL, TIMER_OC_MODE_PWM0);
-    timer_channel_output_shadow_config(TIMER_SPEED_CTL, TIMER_CH_SPEED_CTL, TIMER_OC_SHADOW_DISABLE);
-
-    timer_primary_output_config(TIMER_SPEED_CTL, ENABLE);
-    timer_auto_reload_shadow_enable(TIMER_SPEED_CTL);
-
-    timer_enable(TIMER_SPEED_CTL);
-
-    nvic_irq_enable(TIMER0_Channel_IRQn, 1);
-}
-
-void bldc_enable_set(bit_status status)
-{
-    gpio_bit_write(GPIOF, GPIO_PIN_1, status);
-}
-
-void timer2_config(void)
-{
-    rcu_periph_clock_enable(RCU_GPIOA);
-    rcu_periph_clock_enable(RCU_CFGCMP);
-
-    gpio_mode_set(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO_PIN_9);
-
-    nvic_irq_enable(EXTI4_15_IRQn, 2U);
-
-    syscfg_exti_line_config(EXTI_SOURCE_GPIOA, EXTI_SOURCE_PIN9);
-    exti_init(EXTI_9, EXTI_INTERRUPT, EXTI_TRIG_FALLING);
-    exti_interrupt_flag_clear(EXTI_9);
-
-    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_6);
-    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_6);
-    gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_6);
-
-    timer_ic_parameter_struct timer_icinitpara;
-    timer_parameter_struct timer_initpara;
-
-    /* enable the TIMER clock */
-    rcu_periph_clock_enable(RCU_TIMER2);
-    /* disable a TIMER */
-    timer_deinit(TIMER2);
-    /* initialize TIMER init parameter struct */
-    timer_struct_para_init(&timer_initpara);
-    /* TIMER2 configuration */
-    timer_initpara.prescaler         = 71;
-    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
-    timer_initpara.period            = 65535;
-    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
-    timer_init(TIMER2, &timer_initpara);
-
-    /* TIMER2  configuration */
-    /* initialize TIMER channel input parameter struct */
-    timer_channel_input_struct_para_init(&timer_icinitpara);
-    /* TIMER2 CH0 input capture configuration */
-    timer_icinitpara.icpolarity  = TIMER_IC_POLARITY_RISING;
-    timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI;
-    timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
-    timer_icinitpara.icfilter    = 0x0;
-    timer_input_capture_config(TIMER2,TIMER_CH_0,&timer_icinitpara);
-
-    /* auto-reload preload enable */
-    timer_auto_reload_shadow_enable(TIMER2);
-    /* clear channel 0 interrupt bit */
-    timer_interrupt_flag_clear(TIMER2,TIMER_INT_FLAG_CH0);
-    /* channel 0 interrupt enable */
-    timer_interrupt_enable(TIMER2,TIMER_INT_CH0);
-
-    /* TIMER2 counter enable */
-    timer_enable(TIMER2);
-
-    nvic_irq_enable(TIMER2_IRQn, 3U);
-}