clean shit

在ultrasonic_driver项目中，此次提交标志着向主目录添加新的源文件和头文件，旨在支持输入捕获实验。修改了CMakeLists.txt以包含新的input_capture_exp.c文件，同时在src和inc目录下分别创建了相应的源码和头文件。此外，此次提交还引入了输入捕获相关的硬件配置和初始化例程，为后续的功能开发和测试奠定了基础。

CMakeLists.txt

@@ -19,6 +19,7 @@ set(TARGET_C_SRC
         ${CMAKE_SOURCE_DIR}/src/gd32e23x_it.c
         ${CMAKE_SOURCE_DIR}/src/systick.c
         ${CMAKE_SOURCE_DIR}/src/ultrasonic_driver.c
+        ${CMAKE_SOURCE_DIR}/src/input_capture_exp.c
 )
 
 add_executable(xlsw_3dp_ultrasonic_300K ${TARGET_C_SRC})

README.md

@@ -5,14 +5,4 @@
 - [x] 超声驱动信号（300KHz 50%duty 5cycles）发送
 - [x] PA2/PA3配置为USART0
 - [x] LED配置存活状态闪烁
-- [x] 超声反射回波接受与精准计时
+- [ ] 超声反射回波接受与精准计时
-
-- 超声波反射回来后到sensor成功接收，GPIO上的反应主要分为两部分，
-    1. 超声波在发送时产生的余震，24V下大概为230us，12V下大概为210us。（前面所说的时间均为比较保守的时间）
-    2. 超声波会在接触到目标后反射回sensor上，并产生一个低电平，主要就是检测这部分。
-  
-- [x] 产生一个210-230us可调节的准确延时。（TIMER15配置为1us计一个数，设置重载为需要的时间，产生中断即可。）
-- [x] 在产生指定时间的中断服务函数中，开启EXTI0（PA0,sensor信号接收引脚），开启TIMER14（计时计数器，1us计一个数，计算接收到外部中断的时间）
-- [ ] 在外部中断服务函数中，产生一个事件或中断，进入到TIMER14的中断
-- [x] TIMER14不存在F4x系列，改用TIMER16.
-- [x] 放弃上述流程，多一层中断层，直接在EXTI0的中断服务函数中，直接读取TIMER16的CH_0计数值。

about_template.md

@@ -15,6 +15,7 @@ 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

inc/gd32e23x_it.h

@@ -49,8 +49,6 @@ void PendSV_Handler(void);
 /* this function handles SysTick exception */
 void SysTick_Handler(void);
 
-void TIMER5_IRQHandler(void);
+void TIMER13_IRQHandler(void);
-void TIMER15_IRQHandler(void);
-void EXTI0_1_IRQHandler(void);
 
 #endif /* GD32E23X_IT_H */

inc/input_capture_exp.h

@@ -0,0 +1,11 @@
+//
+// Created by yelv1 on 24-9-23.
+//
+
+#ifndef INPUT_CAPTURE_EXP_H
+#define INPUT_CAPTURE_EXP_H
+
+void input_capture_config(void);
+void pwm_config(void);
+
+#endif //INPUT_CAPTURE_EXP_H

inc/ultrasonic_driver.h

@@ -7,29 +7,6 @@
 
 #include "gd32e23x.h"
 
-#define POWER_SUPPLY_12V
-// #define POWER_SUPPLY_24V
-
-#ifdef POWER_SUPPLY_12V
-    #define TIME_CORRECTION_US  250
-    #define CAPTURE_VALUE_MAX   515
-#elif defined(POWER_SUPPLY_24V)
-    #define TIME_CORRECTION_US  230
-    #define CAPTURE_VALUE_MAX   550
-#else
-    #error "Please define either POWER_SUPPLY_12V or POWER_SUPPLY_24V"
-#endif
-
-#define ULTRASONIC_CYCLES   0x05U
-#define ULTRASONIC_TRAN_US  500  // (ms)
-
-#define LED_PORT            GPIOA
-#define LED_PIN             GPIO_PIN_9
-#define LED_RCU             RCU_GPIOA
-#define LED_TIMER_RCU       RCU_TIMER5
-#define LED_TIMER           TIMER5
-#define LED_IRQ             TIMER5_IRQn
-
 #define USART_RCU           RCU_USART0
 #define USART_GPIO_RCU      RCU_GPIOA
 #define USARET_GPIO_PORT    GPIOA
@@ -38,38 +15,6 @@
 #define USART0_PHY          USART0
 #define USART_BAUDRATE      115200U
 
-#define US_TRAN_GPIO_RCU     RCU_GPIOB
-#define US_TRAN_GPIO_PORT    GPIOB
-#define US_TRAN_PIN          GPIO_PIN_1
-#define US_TRAN_AF           GPIO_AF_0
-
-#define US_TRAN_RCU          RCU_TIMER13
-#define US_TRAN_TIMER        TIMER13
-#define US_TRAN_CH           TIMER_CH_0
-
-#define US_TRAN_DELAY_RCU     RCU_TIMER15
-#define US_TRAN_DELAY_TIMER   TIMER15
-
-#define US_FB_GPIO_RCU       RCU_GPIOA
-#define US_FB_EXTI_RCU       RCU_CFGCMP
-#define US_FB_GPIO_PORT      GPIOA
-#define US_FB_GPIO_PIN       GPIO_PIN_0
-#define US_FB_EXTI_IRQ       EXTI0_1_IRQn
-#define US_FB_GPIO_EXTI      EXTI_0
-
-#define US_ECHO_RCU          RCU_TIMER16
-#define US_ECHO_TIMER        TIMER16
-#define US_ECHO_CH           TIMER_CH_0
-
-void led_config(void);
 void usart_config(void);
-void ultrasonic_config(void);
-void ultrasonic_transmit_config(void);
-void ultrasonic_pwm_out_cycles(const uint8_t cycles);
-void ultrasonic_transmit_delay(const uint16_t micro_second);
-void recevice_exti_config(void);
-void ultrasonic_echo_timer_config(void);
-void ultrasonic_recevice_config(void);
-uint16_t calculate_distance(uint32_t us_value);
 
 #endif //ULTRASONIC_DRIVER_H

src/gd32e23x_it.c

@@ -33,12 +33,8 @@ OF SUCH DAMAGE.
 */
 
 #include "gd32e23x_it.h"
-#include <stdio.h>
 #include "main.h"
 #include "systick.h"
-#include "ultrasonic_driver.h"
-
-__IO uint32_t capture_value;
 
 /*!
     \brief      this function handles NMI exception
@@ -102,40 +98,6 @@ void SysTick_Handler(void)
 {
 }
 
-void TIMER5_IRQHandler(void) {
+void TIMER2_IRQHandler(void) {
-    if (timer_interrupt_flag_get(LED_TIMER, TIMER_INT_FLAG_UP) == SET)
-    {
-        timer_interrupt_flag_clear(LED_TIMER, TIMER_INT_FLAG_UP);
-        static uint8_t led_status = 0;
-        if (led_status)
-        {
-        gpio_bit_write(LED_PORT, LED_PIN, RESET);
-        timer_autoreload_value_config(LED_TIMER, 19200);
-        } else {
-        gpio_bit_write(LED_PORT, LED_PIN, SET);
-        timer_autoreload_value_config(LED_TIMER, 800);
-        }
-        led_status = !led_status;
-    }
-}
 
-void TIMER15_IRQHandler(void) {
-    if (timer_interrupt_flag_get(TIMER15, TIMER_INT_FLAG_UP) == SET)
-    {
-        timer_interrupt_flag_clear(TIMER15, TIMER_INT_FLAG_UP);
-        exti_interrupt_enable(EXTI_0); // turn on hardware external input interrupt
-        timer_counter_value_config(TIMER16, 0);
-        timer_enable(TIMER16);   // turn on timer to calculate the first ultrasonic echo time
-        timer_disable(TIMER15);
-    }
-}
-
-void EXTI0_1_IRQHandler(void) {
-    if (exti_interrupt_flag_get(EXTI_0) == SET)
-    {
-        exti_interrupt_flag_clear(EXTI_0);
-        capture_value = timer_channel_capture_value_register_read(TIMER16, TIMER_CH_0);
-        timer_disable(TIMER16);
-        exti_interrupt_disable(EXTI_0);
-    }
 }

src/input_capture_exp.c

@@ -0,0 +1,105 @@
+//
+// Created by yelv1 on 24-9-23.
+//
+
+#include "input_capture_exp.h"
+#include "gd32e23x.h"
+
+/*
+ * TIMER0-CH2(PA9) output 1K 50%duty
+ * TIMER2 CH0(PA6) input capture
+ */
+
+void input_capture_config(void)
+{
+    rcu_periph_clock_enable(RCU_GPIOA);
+
+    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, 0);
+}
+
+/*
+ * GPIOB-1 PWM output
+ * TIMER13_CH0(AF0)
+ */
+void pwm_config(void)
+{
+    timer_oc_parameter_struct timer_ocinitpara;
+    timer_parameter_struct    timer_initpara;
+
+    rcu_periph_clock_enable(RCU_GPIOA);
+
+    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_9);
+    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);
+    gpio_af_set(GPIOA, GPIO_AF_2, GPIO_PIN_9);
+
+    rcu_periph_clock_enable(RCU_TIMER0);
+    timer_deinit(TIMER0);
+
+    timer_struct_para_init(&timer_initpara);
+    timer_initpara.prescaler         = 71;
+    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
+    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
+    timer_initpara.period            = 999;
+    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
+    timer_init(TIMER0, &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(TIMER0, TIMER_CH_1, &timer_ocinitpara);
+
+    timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_1, 500);
+    timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM1);
+    timer_channel_output_shadow_config(TIMER0, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);
+
+    timer_primary_output_config(TIMER0, ENABLE);
+
+    timer_auto_reload_shadow_enable(TIMER0);
+
+    timer_enable(TIMER0);
+}

src/main.c

@@ -4,16 +4,16 @@
 
     \version 2024-02-22, V2.1.0, firmware for GD32E23x
 */
-// #include "main.h"
+#include "main.h"
 #include <stdio.h>
 #include "gd32e23x.h"
 #include "systick.h"
 #include "gd32e23x_libopt.h"
 
 #include "ultrasonic_driver.h"
+#include "input_capture_exp.h"
 
-extern uint32_t capture_value;
+#define ULTRASONIC_CYCLES 0x05U
-uint16_t distance_uint16;
 
 /*!
     \brief      main function
@@ -26,39 +26,36 @@ int main(void)
     /* configure systick */
     systick_config();
     /* configure ultrasonic board hardware */
-    ultrasonic_transmit_config();
+    // ultrasonic_config();
-    ultrasonic_recevice_config();
+    usart_config();
+    input_capture_config();
+
+    pwm_config();
 
     /* ---------- debug start ---------- */
 
 
 
 
+
     /* ---------- debug end ---------- */
 
     printf("\r\n");
-    printf("XLSW-3DP-UltraSonic Analog 300K!\r\n");
+    printf("START!\r\n");
+    printf("Input Capture Test!\r\n");
     printf("\r\n");
 
-    delay_ms(2000);
-
     while(1)
     {
-        delay_ms(ULTRASONIC_TRAN_US);
+        printf("Input Capture Test!\r\n");
+        delay_ms(500);
 
-        ultrasonic_pwm_out_cycles(ULTRASONIC_CYCLES);
-
-        delay_ms(2);
-        printf("cap_val:%ld\t", capture_value);
-
-        const char* result = (capture_value <= CAPTURE_VALUE_MAX) ? "Distance: %d\n" : "Over Range\n";
-        distance_uint16 = calculate_distance(capture_value);
-        printf(result, distance_uint16);
     }
 }
 
 /* retarget the C library printf function to the USART */
-int _write (int fd, char *pBuffer, int size) {
+int _write (int fd, char *pBuffer, int size)
+{
     for (int i = 0; i < size; i++)
     {
         usart_data_transmit(USART0, (uint8_t)pBuffer[i]);

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/ultrasonic_driver.c

@@ -6,34 +6,8 @@
 #include "gd32e23x.h"
 #include "systick.h"
 
-void led_config(void) {
+void usart_config(void)
-    rcu_periph_clock_enable(LED_RCU);
+{
-
-    gpio_mode_set(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_PIN);
-    gpio_output_options_set(LED_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, LED_PIN);
-    gpio_bit_write(LED_PORT, LED_PIN, SET);
-
-    rcu_periph_clock_enable(LED_TIMER_RCU);
-    timer_deinit(LED_TIMER);
-
-    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(LED_TIMER, &timer_initpara);
-
-    timer_auto_reload_shadow_enable(LED_TIMER);
-    timer_interrupt_enable(LED_TIMER, TIMER_INT_UP);
-
-    timer_enable(LED_TIMER);
-
-    nvic_irq_enable(LED_IRQ, 0);
-}
-
-void usart_config(void) {
     rcu_periph_clock_enable(USART_GPIO_RCU);
     rcu_periph_clock_enable(USART_RCU);
 
@@ -51,143 +25,3 @@ void usart_config(void) {
 
     usart_enable(USART0_PHY);
 }
-
-void ultrasonic_config(void) {
-    rcu_periph_clock_enable(US_TRAN_GPIO_RCU);
-
-    gpio_mode_set(US_TRAN_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, US_TRAN_PIN);
-    gpio_output_options_set(US_TRAN_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, US_TRAN_PIN);
-    gpio_af_set(US_TRAN_GPIO_PORT, US_TRAN_AF, US_TRAN_PIN);
-
-    timer_oc_parameter_struct timer_ocinitpara;
-    timer_parameter_struct    timer_initpara;
-
-    rcu_periph_clock_enable(US_TRAN_RCU);
-    timer_deinit(US_TRAN_TIMER);
-
-    timer_struct_para_init(&timer_initpara);
-    timer_initpara.prescaler          = 0;
-    timer_initpara.alignedmode        = TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection   = TIMER_COUNTER_UP;
-    timer_initpara.period             = 239;
-    timer_initpara.clockdivision      = TIMER_CKDIV_DIV1;
-    timer_init(US_TRAN_TIMER, &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(US_TRAN_TIMER, US_TRAN_CH, &timer_ocinitpara);
-
-    timer_channel_output_pulse_value_config(US_TRAN_TIMER, US_TRAN_CH, 120);
-    timer_channel_output_mode_config(US_TRAN_TIMER, US_TRAN_CH, TIMER_OC_MODE_PWM0);
-    timer_auto_reload_shadow_enable(US_TRAN_TIMER);
-
-    timer_interrupt_enable(US_TRAN_TIMER, TIMER_INT_UP);
-}
-
-void ultrasonic_transmit_config(void) {
-    led_config();
-    usart_config();
-    ultrasonic_config();
-}
-
-void ultrasonic_pwm_out_cycles(const uint8_t cycles) {
-    uint8_t current_cycle = 0;
-
-    timer_channel_output_pulse_value_config(US_TRAN_TIMER, US_TRAN_CH, 120);
-    timer_channel_output_mode_config(US_TRAN_TIMER, US_TRAN_CH, TIMER_OC_MODE_PWM1);
-    timer_enable(US_TRAN_TIMER);
-
-    timer_enable(TIMER15);
-
-    while (current_cycle < cycles)
-    {
-        while (!timer_interrupt_flag_get(US_TRAN_TIMER, TIMER_INT_FLAG_UP));
-        timer_interrupt_flag_clear(US_TRAN_TIMER, TIMER_INT_FLAG_UP);
-        current_cycle ++;
-    }
-    // delay_nop();
-    timer_disable(US_TRAN_TIMER);
-    // if(gpio_output_bit_get(GPIOB, GPIO_PIN_1) == SET)
-    // {
-    //     gpio_bit_reset(GPIOB, GPIO_PIN_1);
-    // }
-}
-
-void ultrasonic_transmit_delay(const uint16_t micro_second) {
-    rcu_periph_clock_enable(US_TRAN_DELAY_RCU);
-    timer_deinit(US_TRAN_DELAY_TIMER);
-
-    timer_parameter_struct timer_initpara;
-    timer_struct_para_init(&timer_initpara);
-    timer_initpara.prescaler         =71;
-    timer_initpara.alignedmode       =TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection  =TIMER_COUNTER_UP;
-    timer_initpara.period            =micro_second - 1;
-    timer_initpara.clockdivision     =TIMER_CKDIV_DIV1;
-    timer_initpara.repetitioncounter =0;
-    timer_init(US_TRAN_DELAY_TIMER, &timer_initpara);
-
-    timer_auto_reload_shadow_enable(US_TRAN_DELAY_TIMER);
-    timer_interrupt_enable(US_TRAN_DELAY_TIMER, TIMER_INT_UP);
-    nvic_irq_enable(TIMER15_IRQn, 1U);
-}
-
-void recevice_exti_config(void) {
-    rcu_periph_clock_enable(US_FB_GPIO_RCU);
-    rcu_periph_clock_enable(US_FB_EXTI_RCU);
-
-    gpio_mode_set(US_FB_GPIO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, US_FB_GPIO_PIN);
-    nvic_irq_enable(US_FB_EXTI_IRQ, 0U);
-    syscfg_exti_line_config(EXTI_SOURCE_GPIOA, EXTI_SOURCE_PIN0);
-
-    exti_init(US_FB_GPIO_EXTI, EXTI_INTERRUPT, EXTI_TRIG_FALLING);
-    exti_flag_clear(US_FB_GPIO_EXTI);
-
-    // exti_interrupt_enable(EXTI_0);
-}
-
-void ultrasonic_echo_timer_config(void) {
-    rcu_periph_clock_enable(US_ECHO_RCU);
-    timer_deinit(US_ECHO_TIMER);
-
-    timer_parameter_struct timer_initpara;
-    timer_struct_para_init(&timer_initpara);
-    timer_initpara.prescaler         =71;
-    timer_initpara.alignedmode       =TIMER_COUNTER_EDGE;
-    timer_initpara.counterdirection  =TIMER_COUNTER_UP;
-    timer_initpara.period            =59999;
-    timer_initpara.clockdivision     =TIMER_CKDIV_DIV1;
-    timer_initpara.repetitioncounter =0;
-    timer_init(US_ECHO_TIMER, &timer_initpara);
-
-    timer_ic_parameter_struct timer_icinitpara;
-    timer_channel_input_struct_para_init(&timer_icinitpara);
-    timer_icinitpara.icpolarity = TIMER_IC_POLARITY_BOTH_EDGE;
-    timer_icinitpara.icselection = TIMER_IC_SELECTION_INDIRECTTI;
-    timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
-    timer_icinitpara.icfilter = 0x03;
-    timer_input_capture_config(US_ECHO_TIMER, US_ECHO_CH, &timer_icinitpara);
-}
-
-void ultrasonic_recevice_config(void) {
-    ultrasonic_transmit_delay(TIME_CORRECTION_US);
-    recevice_exti_config();
-    ultrasonic_echo_timer_config();
-}
-
-uint16_t calculate_distance(uint32_t us_value) {
-    uint16_t distace = (TIME_CORRECTION_US + us_value) * 17;
-    /*
-     *  (TIME_CORRECTION_US + us_value) * 340 m/s
-     *  -----------------------------------------
-     *                  1000 000
-     *  ----------------------------------------------
-     *                          2
-     */
-    return distace;
-}