IC
1.原理图以及配置元素



由图可知PA15为输入捕获接口与一个XL555信号发生器连在了一起。


2.CubeMx的配置步骤








3.生成工程
点击GENERATE CODE生成代码后点击Open Project即可。



4.测试代码
interrupt.h

1. #ifndef __INTERRUPT_H__
   
2. #define __INTERRUPT_H__
   
3. 
   
4. #include "main.h"
   
5. 
   
6. void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim);
   
7. 
   
8. #endif
   
9. 
   

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interrupt.c

1. #include "interrupt.h"
   
2. 
   
3. unsigned int Period = 0;
   
4. unsigned int HighTime = 0;
   
5. 
   
6. void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
   
7. {
   
8.         if(htim->Instance == TIM2)
   
9.         {
   
10.                 if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
    
11.                 {
    
12.                         Period = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1); //读取直接通道
    
13.                         HighTime = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2); //读取间接通道
    
14.                         __HAL_TIM_SetCounter(htim, 0);
    
15.                         HAL_TIM_IC_Start_IT(htim, TIM_CHANNEL_1); //开启中断以便于下次采值
    
16.                         HAL_TIM_IC_Start_IT(htim, TIM_CHANNEL_2);
    
17.                 }
    
18.         }
    
19. }
    
20. 
    

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main.c

1. /* USER CODE BEGIN Header */
   
2. /**
   
3.   ******************************************************************************
   
4.   * @file           : main.c
   
5.   * @brief          : Main program body
   
6.   ******************************************************************************
   
7.   * @attention
   
8.   *
   
9.   * <h2><center>© Copyright (c) 2023 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    
11.   *
    
12.   * This software component is licensed by ST under BSD 3-Clause license,
    
13.   * the "License"; You may not use this file except in compliance with the
    
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    
16.   *
    
17.   ******************************************************************************
    
18.   */
    
19. /* USER CODE END Header */
    
20. /* Includes ------------------------------------------------------------------*/
    
21. #include "main.h"
    
22. #include "tim.h"
    
23. #include "gpio.h"
    
24. 
    
25. /* Private includes ----------------------------------------------------------*/
    
26. /* USER CODE BEGIN Includes */
    
27. #include "lcd.h"
    
28. #include "stdio.h"
    
29. /* USER CODE END Includes */
    
30. 
    
31. /* Private typedef -----------------------------------------------------------*/
    
32. /* USER CODE BEGIN PTD */
    
33. 
    
34. /* USER CODE END PTD */
    
35. 
    
36. /* Private define ------------------------------------------------------------*/
    
37. /* USER CODE BEGIN PD */
    
38. /* USER CODE END PD */
    
39. 
    
40. /* Private macro -------------------------------------------------------------*/
    
41. /* USER CODE BEGIN PM */
    
42. 
    
43. /* USER CODE END PM */
    
44. 
    
45. /* Private variables ---------------------------------------------------------*/
    
46. 
    
47. /* USER CODE BEGIN PV */
    
48. extern unsigned int Period;
    
49. extern unsigned int HighTime;
    
50. char text[30];
    
51. /* USER CODE END PV */
    
52. 
    
53. /* Private function prototypes -----------------------------------------------*/
    
54. void SystemClock_Config(void);
    
55. /* USER CODE BEGIN PFP */
    
56. 
    
57. /* USER CODE END PFP */
    
58. 
    
59. /* Private user code ---------------------------------------------------------*/
    
60. /* USER CODE BEGIN 0 */
    
61. 
    
62. /* USER CODE END 0 */
    
63. 
    
64. /**
    
65.   * @brief  The application entry point.
    
66.   * @retval int
    
67.   */
    
68. int main(void)
    
69. {
    
70.   /* USER CODE BEGIN 1 */
    
71. 
    
72.   /* USER CODE END 1 */
    
73. 
    
74.   /* MCU Configuration--------------------------------------------------------*/
    
75. 
    
76.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    
77.   HAL_Init();
    
78. 
    
79.   /* USER CODE BEGIN Init */
    
80. 
    
81.   /* USER CODE END Init */
    
82. 
    
83.   /* Configure the system clock */
    
84.   SystemClock_Config();
    
85. 
    
86.   /* USER CODE BEGIN SysInit */
    
87. 
    
88.   /* USER CODE END SysInit */
    
89. 
    
90.   /* Initialize all configured peripherals */
    
91.   MX_GPIO_Init();
    
92.   MX_TIM2_Init();
    
93.   /* USER CODE BEGIN 2 */
    
94.         HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1);
    
95.         HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_2);
    
96.         LCD_Init();
    
97.         LCD_Clear(Black);
    
98.         LCD_SetBackColor(Black);
    
99.         LCD_SetTextColor(White);
    
100.   /* USER CODE END 2 */
     
101. 
     
102.   /* Infinite loop */
     
103.   /* USER CODE BEGIN WHILE */
     
104.   while (1)
     
105.   {
     
106.     /* USER CODE END WHILE */
     
107. 
     
108.     /* USER CODE BEGIN 3 */
     
109.                 sprintf(text, "frq:%.2f", 1000000.0 / Period); //分频成1MHz所以这里1000000.0作为被除数
     
110.                 LCD_DisplayStringLine(Line0,  text);
     
111.                 sprintf(text, "Duty:%.2f", HighTime / (float)Period * 100); //占空比为高电平时间 / 周期 * 100%
     
112.                 LCD_DisplayStringLine(Line1,  text);
     
113.   }
     
114.   /* USER CODE END 3 */
     
115. }
     
116. 
     
117. /**
     
118.   * @brief System Clock Configuration
     
119.   * @retval None
     
120.   */
     
121. void SystemClock_Config(void)
     
122. {
     
123.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     
124.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
     
125. 
     
126.   /** Configure the main internal regulator output voltage
     
127.   */
     
128.   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
     
129.   /** Initializes the RCC Oscillators according to the specified parameters
     
130.   * in the RCC_OscInitTypeDef structure.
     
131.   */
     
132.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
     
133.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
     
134.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     
135.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
     
136.   RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV3;
     
137.   RCC_OscInitStruct.PLL.PLLN = 20;
     
138.   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
     
139.   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
     
140.   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
     
141.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
142.   {
     
143.     Error_Handler();
     
144.   }
     
145.   /** Initializes the CPU, AHB and APB buses clocks
     
146.   */
     
147.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     
148.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     
149.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
150.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     
151.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     
152.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     
153. 
     
154.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
     
155.   {
     
156.     Error_Handler();
     
157.   }
     
158. }
     
159. 
     
160. /* USER CODE BEGIN 4 */
     
161. 
     
162. /* USER CODE END 4 */
     
163. 
     
164. /**
     
165.   * @brief  This function is executed in case of error occurrence.
     
166.   * @retval None
     
167.   */
     
168. void Error_Handler(void)
     
169. {
     
170.   /* USER CODE BEGIN Error_Handler_Debug */
     
171.   /* User can add his own implementation to report the HAL error return state */
     
172.   __disable_irq();
     
173.   while (1)
     
174.   {
     
175.   }
     
176.   /* USER CODE END Error_Handler_Debug */
     
177. }
     
178. 
     
179. #ifdef  USE_FULL_ASSERT
     
180. /**
     
181.   * @brief  Reports the name of the source file and the source line number
     
182.   *         where the assert_param error has occurred.
     
183.   * @param  file: pointer to the source file name
     
184.   * @param  line: assert_param error line source number
     
185.   * @retval None
     
186.   */
     
187. void assert_failed(uint8_t *file, uint32_t line)
     
188. {
     
189.   /* USER CODE BEGIN 6 */
     
190.   /* User can add his own implementation to report the file name and line number,
     
191.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
192.   /* USER CODE END 6 */
     
193. }
     
194. #endif /* USE_FULL_ASSERT */
     
195. 
     
196. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     
197. 
     

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5.演示效果



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