TIM_ARRPreloadConfig(PWM_N_TIM,ENABLE);

这行代码是用来配置 TIM（定时器）的自动装载功能，具体来说是使能 PWM_N_TIM 定时器的自动装载功能。自动装载功能允许定时器在达到自动重装载寄存器（ARR）的值后重新开始计数，从而实现定时器的循环计数或周期性触发。通过使能自动装载功能，可以确保定时器在每次计数完成后自动重新加载 ARR 的值，从而实现定时器的持续运行。

相关问题

void TIM4_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_Initstructure; TIM_TimeBaseInitTypeDef TIM_TimeBasestructure; TIM_ocInitTypeDef TIM_OCInitStructure; //TIM4/GPIOA/AFIO CLK enable RCC_APB1PeriphclockCmd (RCC_APBlPeriph_TIM4,ENABLE); Rcc_APB2PeriphclockCmd(Rcc_APB2Periph_GPIOB , ENABLE); Rcc_APB2PeriphClockCmd (RCC_APB2Periph_AFIO ,ENABLE); //set PB6(TIM4_CHl) PB7(TIM4_CH2) as AF output mode for PRM output GPIO_Initstructure.GPIO_Pin = GPIO_Pin_6 l GPIO_Pin_7; GPIO_Initstructure.GPIO_Mode = GPIo_Mode_AF_PP; GPIO_Initstructure.GPIo_Speed = GPIo_Speed_5OMHz; GPIO_Init(GPIOB,&GPIO_Initstructure); //TIM4 base config TIM_TimeBasestructure.TIM_Period = arr; TIM_TimeBasestructure.TIM_Prescaler = psc; TIM_TimeBasestructure.TIM_C1ockDivision = 0; TIM_TimeBasestructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit (TIM4,&TIM_TimeBasestructure) ; //PWM of TIM4_CHl config TIM_OCInitstructure.TIM_OCMode = TIM_OcMode_PWM1; TIM_OCInitstructure.TIM_Outputstate = TIM_Outputstate_Enable; TIM_OcInitstructure.TIM_Pulse = 0; TIM_OCInitstructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC1Init (TIM4,&TIM_OCInitStructure) ; TIM_OClpreloadConfig(TIM4,TIM_OCPreload_Enable); // PWM of TIM4_CH2 config TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWMl; TIM_OCInitstructure.TIM_Outputstate = TIM_Outputstate_Enable; TIM_OCInitStructure.TIM_Pulse =0; TIM_OCInitstructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC2Init (TIM4,&TIM_OCInitStructure) ; TIM_OC2PreloadConfig(TIM4,TIM_OCPreload_Enable) ; //TIM4 preload enable TIM_ARRPreloadconfig (TIM4,ENABLE); //MOE enable for advanced TIMl or TIM8 TIM_Ctr1PWMOutputs (TIM4,ENABLE); //TIM4 enable TIM_Cmd (TIM4,ENABLE);

这是一段STM32的代码，用于初始化TIM4定时器和PWM输出。其中，通过GPIO_InitTypeDef结构体初始化GPIOB的PB6和PB7引脚，将它们设置为复用推挽输出模式（AF_PP）。通过TIM_TimeBaseInitTypeDef结构体初始化TIM4的时基参数，包括周期（arr）、预分频器（psc）、时钟分频等。接下来通过TIM_ocInitTypeDef结构体初始化TIM4的PWM输出参数，包括输出模式（TIM_OcMode_PWM1）、输出使能（TIM_Outputstate_Enable）、PWM脉宽（TIM_Pulse）、极性（TIM_OCPolarity_High）等。最后通过TIM_Cmd函数使能TIM4定时器，并通过TIM_Ctr1PWMOutputs函数使能定时器的PWM输出。

帮我转换成HAL库 void TIM2_PWM_Output(float Duty , uint32_t Frequency) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); /* GPIOA clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO ,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = (1000000/Frequency)-1; //ARR = (TIM3 counter clock /Frequency)-1 TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); /* PWM1 Mode configuration: Channel3 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = ((1000000/Frequency)-1)*Duty; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC3Init(TIM2, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM2, ENABLE); /* TIM3 enable counter */ TIM_Cmd(TIM2, ENABLE); }

对应的HAL库代码如下：

#include "stm32f1xx_hal.h"

TIM_HandleTypeDef htim2;

void TIM2_PWM_Output(float Duty , uint32_t Frequency)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  __HAL_RCC_TIM2_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitStruct.Pin = GPIO_PIN_2;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 71;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = (1000000/Frequency)-1;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim2);

  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = ((1000000/Frequency)-1)*Duty;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3);

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig);

  HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_3);
}

注意，此处假设你使用的是STM32F1系列的芯片，需要包含"stm32f1xx_hal.h"头文件。请根据实际情况进行调整。