init.c

来自「串口利用定时器中断接受不同的帧」· C语言 代码 · 共 274 行

#include "main.h"

typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;

//#define countof(a)   (sizeof(a) / sizeof(*(a)))//用来计算数组的长度
#define TxBufferSize   (countof(TxBuffer) - 1)




/*下面的定义  用于中断发送数据 Uart_send_counter为要发送的字节数，*******
    eg 要发送数组a【】的内容
   #define countof(a)   (sizeof(a) / sizeof(*(a))) 可以获a【】的字节数，******
   *Uart_send_pointer被指向要发送的数组地址  Uart0_send_pointer=a
    函数 USART_SendData(USARTx, *Uart_send_pointer++);来发送数据，每发送一次
   Uart_send_counter减一至到0*******************************************/

u8 Uart_send_counter; //Uart_send()函数发送的字节数
vu8 *Uart_send_pointer;//发送的数组指针




u8 Uart0_rev_buff[];
u32 Uart0_rev_count=0;
u32 CCR1_Val=1000;

/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : 配置时钟到 72m
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  ErrorStatus HSEStartUpStatus;
  /* 时钟复位 */
  RCC_DeInit();

  /* 使能HSE（外部时钟） */
  RCC_HSEConfig(RCC_HSE_ON);

  /* 等外部时钟稳定 */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
 
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);

    /* PLLCLK = 8MHz * 9 = 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

    /* Enable PLL */ 
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  } 
  
   /* TIM1使能 */
  
    /* TIM2使能 */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); 
  
   /* TIM3使能 */
  
   /* TIM4使能 */
  
  /* 是能用到的外设的时钟-----一定要把用到的写上    主意是apb1还是apb2*/
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA  | RCC_APB2Periph_AFIO, ENABLE);
                        

}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : 配置用到的gpio
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
/****************串口一的引脚的定义  注意看是不是重映射****************************************/
  /* Configure USART1 Rx (PA.10) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  /* Configure USART1 Tx (PA.09) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : 中断优先级配置
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

#ifdef  VECT_TAB_RAM  
  /* 中断向量ram中的位置base location at 0x20000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); 
#else  /* VECT_TAB_FLASH  */
  /* 中断向量flash中的位置 base location at 0x08000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   
#endif 

  /* 配置优先级组 注意看0，1，2，3的区别*/  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  
  /* 使能uart1中断设置其优先级 */
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  /* 使能tim2中断设置其优先级  */
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}


/*******************************************************************************
* Function Name  : Uart_config
* Description    : 串口配置
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
/* USART1  configuration ------------------------------------------------------*/
  /* USART  configured as follow:
        - BaudRate = 9600 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  注意  所有用到的串口可以用一个配置即可   
  */
void Uart_config(void)
{
   USART_InitTypeDef USART_InitStructure;
   
   
  USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  
     /* 配置usart1 */
  USART_Init(USART1, &USART_InitStructure);  
    /* 使能接受和发送中断*/
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    /*使能uart1  */
  USART_Cmd(USART1, ENABLE);
}

/*******************************************************************************
* Function Name  : TIM_config
* Description    : 定时器配置
* Input          : None可以更改为溢出中断
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_config(void)
{ 
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 // TIM_OCInitTypeDef  TIM_OCInitStructure;
  /* Time base configuration[初始化时间基单元] */
 TIM_TimeBaseStructure.TIM_Period = 65535;          
  TIM_TimeBaseStructure.TIM_Prescaler = 0xff;       
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
   TIM_DeInit(TIM2);
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* Prescaler configuration [配置TIM的预分频数]*/
 // TIM_PrescalerConfig(TIM2, 36, TIM_PSCReloadMode_Immediate);//TIM2,36分频，预分频数立即载入
#if 0
  /* [配置输出比较模式：通道1]*/
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;//TIM输出比较计时模式
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//输出允许
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;//脉冲CCR1_Val
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//极性HIGH

  TIM_OC1Init(TIM2, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);//关闭TIM2在CCR1寄存器上的预载入寄存器
#endif
  /* TIM IT enable [使能TIM2比较中断]*/
   TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
  TIM_ITConfig(TIM2, TIM_IT_Update , ENABLE);
  /* TIM2 enable counter */
 // TIM_Cmd(TIM2, ENABLE);

}

/*******************************************************************
* Function Name  :  Uart_InterruptsendN 不带传输字节
* Description    : 中断发送字符串
* Input          : 参数一：uart1 2 3 4.。
                   参数二：要发送的字符串地址指针
* Output         : 无
* Return         : 无
*******************************************************************************/
void Uart_InterruptsendN(USART_TypeDef *USARTx,u8* Uart0_sended)
{   
      Uart_send_counter=countof(Uart0_sended);
      Uart_send_pointer=Uart0_sended;
      USART_SendData(USARTx, *Uart_send_pointer++);
      USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
       //UART_ITConfig(UARTx,UART_IT_TxEmpty, ENABLE);
}


/*******************************************************************
* Function Name  :  Uart_InterruptsendY 带字节传输
* Description    : 中断发送字符串
* Input          : 参数一：uart1 2 3 4.。
                   参数二：要发送的字符串地址指针
                   参数三：要传输的字节数
* Output         : 无
* Return         : 无
*******************************************************************************/
void Uart_InterruptsendY(USART_TypeDef *USARTx,vu8* Uart0_sended,u8 NbOfBytes )
{   
      Uart_send_counter=NbOfBytes;
      Uart_send_pointer=Uart0_sended;
     USART_SendData(USARTx, *Uart_send_pointer++);
     USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
       //UART_ITConfig(UARTx,UART_IT_TxEmpty, ENABLE);
}