ion(void)
{
ErrorStatus HSEStartUpStatus; //枚举变量，定义高速时钟的启动状态
RCC_DeInit(); //RCC系统重置，用于Debug目的
RCC_HSEConfig(RCC_HSE_ON); //使能高速时钟源HSE
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE稳定
if(HSEStartUpStatus == SUCCESS)
{
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_HCLKConfig(RCC_SYSCLK_Div1); // HCLK = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); // PCLK2 = HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); ///PCLK1 = HCLK/2
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08){}
}
RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1 |RCC_APB2Periph_GPIOA |RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIOB , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
}
//------------------------------------------------------------------
//函数名：void GPIO_Configuration()
//输入参数：null
//返回参数：null
//说明：GPIO初始化函数
//------------------------------------------------------------------
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;//GPIO初始化结构体声明
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 TX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART1 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
//------------------------------------------------------------------
//函数名：void NVIC_Configuration()
//输入参数：null
//返回参数：null
//说明：NVIC初始化函数
//------------------------------------------------------------------
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure; //NVIC初始化结构体声明
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //如果程序在RAM中调试那么定义中断向量表在RAM中否则在Flash中
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //设置串口1中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级 0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //设置定时器3全局中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级 1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
}
//------------------------------------------------------------------
//函数名：void USART_Configuration()
//输入参数：null
//返回参数：null
//说明:串口初始化函数
//------------------------------------------------------------------
void USART_Configuration(void){
USART_InitTypeDef USART_InitStructure; //串口初始化结构体声明
USART_ClockInitTypeDef USART_ClockInitStruct;
USART_InitStructure.USART_BaudRate = 115200;//设置波特率为115200bps
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//数据位8位
USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位1位
USART_InitStructure.USART_Parity = USART_Parity_No;//无校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件流控
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接受和发送模式都打开
