标题STM32Cube配置等精度测频和测相位差
一、测量精度：
1、频率精度
频率测量、周期测量的信号频率范围扩展为1Hz～20MHz(这里由于信号发生器最高产生20MHz频率，所以更高频率未尝试,预计更高可达到50MHz),频率测量、周期测量的测量误差为0.000001.
2、相位差精度
相位差测量，可以达到量程：0～360°；测量准确度：1°；分辨率：0.1°的题目要求
二、项目配置
1、时钟配置
stm32F429最高主频为168MHz
配置时钟源
2、定时器配置
- Time1配置
- Time2配置
- Time3配置
- Time4配置
- Time5配置
- Time8配置
- Time9配置
- Time12配置
- 定时器优先级配置
3、生成工程配置
3、串口配置
配置两个串口，一个收一个发，防止数据传输时大彩屏卡死；
三、Keil5编写代码
1、main函数代码
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2019 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "base.h" //包含基本按键、灯、位带操作等
#include "stdio.h"
#include "head_define.h"
#include "Algorithm.h"
#include "arm_math.h"
#include "hmi_user_uart.h"
#include "cmd_process.h"
#include "outputdata.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define Period_Num 1
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/*测频测周变量定义*/
uint8_t TIM4CH1_CAPTURE_STA=0X80; //输入捕获状态
uint32_t TIM5_COUNTER_VAL[Period_Num]; //定时器1计数组，测系统时钟
uint32_t TIM2_COUNTER_VAL[Period_Num]; //定时器2计数组，被测信号周期
float TIM5_COUNTER_Val; //定时器1计数值，测系统时钟
float TIM2_COUNTER_Val; //定时器2计数值，被测信号周期
float TIM_FREQ; //频率值
float TIM_period; //周期值
uint8_t TIM4CH1_CAPTURE_GATE=0; //预设闸门标志位
uint8_t TIM4CH1_CAPTURE_STB=0; //数组存满标志位
static uint8_t i,j=0; //数组用
uint32_t TIM5_COUNTER_TEMP; //定时器1计数滤波
uint32_t TIM2_COUNTER_TEMP; //定时器2计数滤波
float TIM_FREQ2;
float TIM_FREQ3;
float TIM_FERQ[5];
/*相位变量定义*/
uint32_t capture_period=0,capture_sta=0,capture_period1=0,capture_sta1=0;
float Phase=0,capture_period2=0;
//校准后的频率
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM1_Init();
MX_TIM2_Init();
MX_TIM3_Init();
MX_TIM4_Init();
MX_TIM5_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
MX_TIM8_Init();
MX_TIM9_Init();
MX_TIM12_Init();
/* USER CODE BEGIN 2 */
TFT_Init();
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_4); //使能PWM波
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_3); //使能PWM波
HAL_TIM_IC_Start_IT(&htim4,TIM_CHANNEL_1); //使能TIM4输入捕获中断
__HAL_TIM_ENABLE_IT(&htim4, TIM_CHANNEL_1); //使能更新中断
HAL_TIM_Base_Start_IT(&htim1); //使能TIM5定时器中断
HAL_TIM_IC_Start_IT(&htim9,TIM_CHANNEL_1);
HAL_TIM_IC_Start_IT(&htim12,TIM_CHANNEL_1);
// HAL_TIM_Base_Start_IT(&htim1);//使能定时器1中断
__HAL_TIM_SET_COUNTER(&htim5,0); //定时器1清零
__HAL_TIM_SET_COUNTER(&htim2,0); //定时器2清零
TIM4CH1_CAPTURE_GATE = 1; //开启预设闸门
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
capture_period2=capture_period/2.0;
Phase=((capture_period1-capture_period2)/capture_period1)*360.0+21;
SetTFTText(0,3,"%.1f度",Phase);
SetTFTText(0,5,"%.2f",10.2);
HAL_Delay(100);
if(TIM4CH1_CAPTURE_STB)//判断数组是否存满
{
TIM5_COUNTER_Val = (float) TIM5_COUNTER_TEMP / Period_Num; //定时器1计数滤波（100个数组求平均）
TIM2_COUNTER_Val = (float) TIM2_COUNTER_TEMP / Period_Num; //定时器2计数滤波 (100个数组求平均）
TIM_FREQ = 1000.0*(TIM2_COUNTER_Val*3000.0)/TIM5_COUNTER_Val; //定时器2计数值*定时器1频率/定时器1计数值
if(TIM_FREQ<=300)
{
TIM_FREQ2=TIM_FREQ*1.00020;
TIM_period=1.0/TIM_FREQ2;
SetTFTText(0,1,"%.6fHz",TIM_FREQ2);
SetTFTText(0,2,"%.6fs",TIM_period);
}else
{
TIM_FREQ2=TIM_FREQ*0.9999480027038594;
TIM_period=1.0/TIM_FREQ2;
SetTFTText(0,1,"%.6fMHz",TIM_FREQ2/1000000.0);
SetTFTText(0,2,"%.6fus",TIM_period*1000000.0);
}
TIM5_COUNTER_TEMP = 0; //定时器5计数值清零
TIM2_COUNTER_TEMP = 0; //定时器2计数值清零
TIM4CH1_CAPTURE_STB = 0; //数组存满标志位
TIM4CH1_CAPTURE_STA |= 0X80; //输入捕获状态
HAL_TIM_IC_Start_IT(&htim4,TIM_CHANNEL_1);//使能TIM4输入捕获中断
}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 25;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
//定时器TIM4输入捕获中断处理回调函数，该函数在HAL_TIM_IRQHandler中会被调用
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)//捕获中断发生时执行
{
//***********************************************************************
//测频率
if(TIM4CH1_CAPTURE_GATE==0)
{
if(TIM4CH1_CAPTURE_STA&0X40) //闸门关闭后第二次捕获到一个上升沿
{
TIM4CH1_CAPTURE_STA = 0X80; //标记成功捕获到闸门的一次高电平脉宽
TIM5_COUNTER_VAL[i] = __HAL_TIM_GET_COUNTER(&htim5); //获取定时器1计数值
TIM2_COUNTER_VAL[i] = __HAL_TIM_GET_COUNTER(&htim2); //获取定时器2计数值
TIM5_COUNTER_TEMP += TIM5_COUNTER_VAL[i];
TIM2_COUNTER_TEMP += TIM2_COUNTER_VAL[i];
i++;
if(i == Period_Num)//100个闸门周期
{
i = 0;
TIM4CH1_CAPTURE_STB = 1;//数组存满标志位
TIM4CH1_CAPTURE_STA = 0;//标记捕获到了上升沿状态位清零
HAL_TIM_IC_Stop_IT(&htim4,TIM_CHANNEL_1); //关闭输入捕获
}
HAL_TIM_Base_Stop(&htim5); //关闭定时器5
HAL_TIM_Base_Stop(&htim2); //关闭定时器2
__HAL_TIM_SET_COUNTER(&htim5,0); //定时器5清零
__HAL_TIM_SET_COUNTER(&htim2,0); //定时器2清零
}
}
if(TIM4CH1_CAPTURE_GATE==1)
{
if(TIM4CH1_CAPTURE_STA&0X80)//第一次捕获上升沿
{
TIM4CH1_CAPTURE_STA = 0X40; //标记捕获到了上升沿开始计数
HAL_TIM_Base_Start(&htim5); //使能定时器1，对标准信号一直计数
HAL_TIM_Base_Start(&htim2); //使能定时器2，对被测信号一直计数
}
}
***********************************************************************
//测相位
if(htim->Instance==TIM9)
{
if(htim->Channel==HAL_TIM_ACTIVE_CHANNEL_1)
{
if(!capture_sta)
{
__HAL_TIM_SET_COUNTER(&htim9,0);
}
}
}
if(htim->Instance==TIM12)
{
if(htim->Channel==HAL_TIM_ACTIVE_CHANNEL_1)
{
HAL_TIM_IC_Stop_IT(&htim9,TIM_CHANNEL_1);
capture_period=__HAL_TIM_GET_COMPARE(&htim9,TIM_CHANNEL_1);
if(!capture_sta1)
{
__HAL_TIM_SET_COUNTER(&htim12,0);
capture_sta1=1;
}else
{
HAL_TIM_IC_Start_IT(&htim9,TIM_CHANNEL_1);
__HAL_TIM_SET_COUNTER(&htim9,0);
capture_period1=__HAL_TIM_GET_COMPARE(&htim12,TIM_CHANNEL_1);
capture_sta1=0;
}
}
}
}
//定时器TIM5溢出中断处理回调函数
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
if(TIM1 == htim->Instance)
{
PCout(9)=~PCout(9);
if(TIM4CH1_CAPTURE_GATE)
{
TIM4CH1_CAPTURE_GATE = 0;
}
else
{
TIM4CH1_CAPTURE_GATE = 1;
}
}
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
2、大彩屏
3、项目接线连接
需要将Time3的CH3连接到Time4中，否则无法测量。
4、项目工程代码
如需项目工程代码，请关注公众号：漂流小江，在公众号中即可获取代码