STM32函数库的调用

TIM_ICInitStructure.TIM_ICFilter = 0x4; //滤波设置，经历几个周期跳变认定波形稳定0x0～0xF
TIM_ICInit(TIM2, &TIM_ICInitStructure); //初始化
TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2); //选择时钟触发源
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
四·GPIO的配置.c
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the EXTI15_10 Interrupt */
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
STM32函数库的调用
一·时钟配置.c
void RCC_Configuration(void)
{
/*将外设RCC寄存器重设为缺省值*/
RCC_DeInit();
/*设置外部高速晶振（HSE）*/
RCC_HSEConfig(RCC_HSE_ON); //RCC_HSE_ON——HSE晶振打开(ON)
/*等待HSE起振*/
}
六·TIM的CAP初始化分为三部分
void TIM_Configuration(void)//TIM2的CAP初始化函数
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定时器初始化结构
TIM_ICInitTypeDef TIM_ICInitStructure; //通道输入初始化结构
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS) //SUCCESS：HSE晶振稳定且就绪
{
/*设置AHB时钟（HCLK）*/
RCC_HCLKConfig(RCC_SYSCLK_Div1); //RCC_SYSCLK_Div1——AHB时钟=系统时钟
USART_Init(USART1, &USART_InitStructure);//初始化串口
USART_Cmd(USART1, ENABLE);//启动串口
}
三·NVIC的配置.c
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
//RCC_APB2Periph_GPIOA GPIOA时钟
//RCC_APB2Periph_GPIOB GPIOB时钟
//RCC_APB2Periph_GPIOC GPIOC时钟
//RCC_APB2Periph_GPIOD GPIOD时钟
}
二·串口配置.c
void USART_Configuration(void)//串口初始化函数
/*设置FLASH存储器延时时钟周期数*/
FLASH_SetLatency(FLASH_Latency_2); //FLASH_Latency_2??2延时周期
/*选择FLASH预取指缓存的模式*/
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //预取指缓存使能
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;//下降沿
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;//管脚与寄存器对应关系
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;//分频器
USART_ART_StopBits = USART_StopBits_1;// 1位停止字节
USART_ART_Parity = USART_Parity_No ;//无奇偶校验
USART_ART_HardwareFlowControl = USART_HardwareFlowControl_None; //无流控制
/*设置高速AHB时钟（PCLK2）*/
RCC_PCLK2Config(RCC_HCLK_Div1); //RCC_HCLK_Div1——APB2时钟= HCLK
/*设置低速AHB时钟（PCLK1）*/
RCC_PCLK1Config(RCC_HCLK_Div2); //RCC_HCLK_Div2——APB1时钟= HCLK / 2
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//基本初始化
//TIM2通道的捕捉初始化
TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;//通道选择
TIM_Cmd(TIM2, ENABLE); //启动TIM2
}
七·TIM中PWM输出
void TIM_Configuration(void)//TIM初始化函数
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定时器初始化结构
TIM_OCInitTypeDef TIM_OCInitStructure;//通道输出初始化结构
TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);//触发方式
TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable); //启动定时器的被动触发
TIM_ITConfig(TIM2,TIM_IT_CC4, ENABLE); //打开中断
/*设置PLL时钟源及倍频系数*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);// PLL的输入时钟= HSE时钟频率；RCC_PLLMul_9——PLL输入时钟x 9
/*使能PLL */
RCC_PLLCmd(ENABLE);
/*检查指定的RCC标志位(PLL准备好标志)设置与否*/
{
USART_InitTypeDef USART_InitStructபைடு நூலகம்re; //串口设置恢复默认参数
USART_ART_BaudRate = 9600; //设置波特率=9600
USART_ART_WordLength = USART_WordLength_8b;//字长8位
/*连接EXTI Line9到PB.09 */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource9);
/*配置EXTI Line9产生一个下降沿中断*/
EXTI_InitStructure.EXTI_Line = EXTI_Line9;
EXTI_Init(&EXTI_InitStructure);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/*设置系统时钟（SYSCLK）*/
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//RCC_SYSCLKSource_PLLCLK——选择PLL作为系统时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
五·EXTI配置.c
void EXTI_Configuration(void)
{
/*连接EXTI Line0到PA.00*/
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
/*配置EXTI Line0产生一个下降沿中断*/
EXTI_InitStructure.EXTI_Line = EXTI_Line0;