板子接收PC端发送的数据

发表于 2015-11-17 10:31

刚接触这个，用的NUCLEO-F030R8的板子，我现在能做的都改了，板子就是接收不到数据，我把小程序图了，哪位大哥有时间帮我看一下的，万分感谢

#include "main.h"
/** @addtogroup IO_Toggle
  * @{
  */
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static __IO uint32_t TimingDelay;
uint8_t __IO BlinkSpeed = 0;
/* Private function prototypes -----------------------------------------------*/
RCC_ClocksTypeDef RCC_Clocks;
USART_InitTypeDef USART2_InitStruct;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Private functions ---------------------------------------------------------*/
/**
  * @brief Main program
  * @param  None
  * @retval None
  */

void USART2_IRQHandler (void)//ÖÐ¶Ï´¦Àíº¯Êý
{
      if (USART_GetFlagStatus(USART2,USART_FLAG_RXNE) ==SET)
            {
               USART_SendData(USART2,USART_ReceiveData(USART2));
               while (!USART_GetFlagStatus(USART2,USART_FLAG_TC));
            }
      USART_ClearITPendingBit(USART2,USART_IT_RXNE);//ÖÐ¶Ï±êÖ¾Î»
}

int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured,
   this is done through SystemInit() function which is called from startup
   file (startup_stm32f030.s) before to branch to application main.
   To reconfigure the default setting of SystemInit() function, refer to
   system_stm32f0xx.c file
   */

  /* SysTick end of count event each 1ms */
  RCC_GetClocksFreq(&RCC_Clocks);
  SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);

  /* Initialize LED2 */
  STM_EVAL_LEDInit(LED2);

  /* Initialize User_Button on STM32NUCLEO */
  STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI);

  /* Initiate Blink Speed variable */
  BlinkSpeed = 0;
  USART_StructInit(&USART2_InitStruct);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
//
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//
GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_1);
  GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_1);
//nvic
  //NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
  //NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  //NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelPriority= 0x03;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
USART_DeInit(USART2);
USART_Init(USART2, &USART2_InitStruct);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);
USART_ClearFlag (USART2,USART_FLAG_TC);
USART_Cmd(USART2, ENABLE);
  /* Infinite loop */
  while (1)
  {
/* Test on blink speed */
if(BlinkSpeed == 0)
{
   /*LED2 Toggle each 50ms*/
   STM_EVAL_LEDToggle(LED2);
   Delay(50);
}
else if(BlinkSpeed == 1)
{
   STM_EVAL_LEDToggle(LED2);
   /*LED2 Toggle each 200ms */
   Delay(200);
}

  //USART_SendData(USART2, 0x5555);
  }
}
/**
* @brief  Inserts a delay time.
* @param  nTime: specifies the delay time length, in 1 ms.
* @retval None
*/
void Delay(__IO uint32_t nTime)
{
  TimingDelay = nTime;

  while(TimingDelay != 0);
}
/**
* @brief  Decrements the TimingDelay variable.
* @param  None
* @retval None
*/
void TimingDelay_Decrement(void)
{
  if (TimingDelay != 0x00)
  {
TimingDelay--;
  }
}
#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 can add his own implementation to report the file name and line number,
  ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

发表于 2015-11-17 10:32

其中那个NVIC的设置不知道怎么搞，我杠掉的那个NVIC那里改怎么弄

发表于 2015-11-17 10:34

单独让板子循环发送0x5555是可以的，就是接不到

发表于 2015-11-17 10:53

USART_Init(USART2, &USART2_InitStruct);
这里面的USART2_InitStruct结构体未配置！
简单来说，就是你连串口的参数都没设置，怎么能够通讯的起来。

发表于 2015-11-17 10:55

本帖最后由 jjjkkk00 于 2015-11-17 10:56 编辑

无标题.jpg

最简单的是用STM32 CUBE软件，自动生成。
好久不用3.0的库了，看着有点陌生了

发表于 2015-11-17 10:57

复制

void connectUsart1ToExt(uint32_t baudrate, uint8_t parity, uint8_t length, uint8_t stopbits)

{

        GPIO_InitTypeDef GPIO_InitStructure;

        USART_InitTypeDef USART_InitStructure;  

        

#if defined  (STM32F051) || defined (STM32F042)

        RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

        

        // GPIOµÄ¹«¹²ÌØÐÔ

        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;



        //COM1

        //USARTx_TX   GPIO_Mode_AF_PP

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

        GPIO_InitStructure.GPIO_Pin = GetPinOf(ST_COM1_Tx);

        GPIO_Init(GetPortOf(ST_COM1_Tx) , &GPIO_InitStructure);

        SetAF_COM1_Tx;//±ØÐëÑ¡Ôñ¸´ÓÃ¹¦ÄÜ



        //USARTx_RX   GPIO_Mode_AF_PP & IPU

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

        GPIO_InitStructure.GPIO_Pin = GetPinOf(ST_COM1_Rx);

        GPIO_Init(GetPortOf(ST_COM1_Rx), &GPIO_InitStructure);

        SetAF_COM1_Rx;//±ØÐëÑ¡Ôñ¸´ÓÃ¹¦ÄÜ

        

        //RS485-DE

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

        GPIO_InitStructure.GPIO_Pin = GetPinOf(ST_COM1_DE);

        GPIO_Init(GetPortOf(ST_COM1_DE), &GPIO_InitStructure);

        GPIO_SetBits(RS485_DE);

        

#else

        #warning "Make sure needn't define STM32F051 etc. ?"

#endif



  USART_Cmd(USART1, DISABLE); //ÓÃ×÷ÖØÐÂÅäÖÃUSART1£¬ÏÈ¹Ø´®¿Ú



  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

  RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);

  RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);

  

  USART_InitStructure.USART_BaudRate = baudrate;

  

  switch (parity)

  {

  case 1://Ææ

    USART_InitStructure.USART_Parity = USART_Parity_Odd;

    if (length == 7)

      USART_InitStructure.USART_WordLength = USART_WordLength_8b;

    else

      USART_InitStructure.USART_WordLength = USART_WordLength_9b;

    break;

  case 2://Å¼

    USART_InitStructure.USART_Parity = USART_Parity_Even;

    if (length == 7)

      USART_InitStructure.USART_WordLength = USART_WordLength_8b;

    else

      USART_InitStructure.USART_WordLength = USART_WordLength_9b;

    break;

  default://0ÎÞ8Î»Êý¾ÝÎ»

    USART_InitStructure.USART_Parity = USART_Parity_No;

    USART_InitStructure.USART_WordLength = USART_WordLength_8b;

    break;

  }



  switch (stopbits)

  {

  case 2:

    USART_InitStructure.USART_StopBits = USART_StopBits_2;

    break;

  case 3:

    USART_InitStructure.USART_StopBits = USART_StopBits_1_5;

    break;

#if defined  (STM32F051) || defined (STM32F042)

  //null

#elif defined (STM32F100) || defined (STM32F101) || defined (STM32F103)

  case 0://±£ÁôSTM32F05²»Ö§³Ö,STM32F10Ö§³Ö

        USART_InitStructure.USART_StopBits = USART_StopBits_0_5;

        break;

#else

        #warning "Make sure needn't define STM32F051 etc. ?"

#endif

  default://1

    USART_InitStructure.USART_StopBits = USART_StopBits_1;

    break;

  }

  

  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

  USART_Init(USART1, &USART_InitStructure);

  

  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

  USART_ITConfig(USART1, USART_IT_TXE, DISABLE);



  USART_Cmd(USART1, ENABLE);

}

发表于 2015-11-17 10:59

wu93111 发表于 2015-11-17 10:32
其中那个NVIC的设置不知道怎么搞，我杠掉的那个NVIC那里改怎么弄

NVIC是配置中断优先级的。如果要用中断接收，必须配置。

发表于 2015-11-17 11:00

jjjkkk00 发表于 2015-11-17 10:53
USART_Init(USART2, &USART2_InitStruct);
这里面的USART2_InitStruct结构体未配置！
简单来说，就是你连串 ...

串口参数在usart.c里面有，它原先就写在那，应该没事吧，毕竟我的循环发送是可以的，就是这个接收不到

发表于 2015-11-17 11:02

上传一份很久之前的STM32 API使用手册。貌似是2.0版本的库。
使用3.0版本可以参考，大致没怎么变化。

stm32固件数据库.pdf (2.79 MB, 下载次数: 2)

发表于 2015-11-17 11:06

本帖最后由 jjjkkk00 于 2015-11-17 11:08 编辑

wu93111 发表于 2015-11-17 11:00
串口参数在usart.c里面有，它原先就写在那，应该没事吧，毕竟我的循环发送是可以的，就是这个接收不到 ...

看到了，你用了缺省值 USART_StructInit(&USART2_InitStruct);。无标题.jpg

那就是中断未使能的问题了NVIC。

发表于 2015-11-17 11:08

刚好在弄STM32F070，跟030差不多，发个我设置的USART初始化函数；
static void xMBPortUsartInit(uint32_t ulBaudRate)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

USART_DeInit(cCOM1);

/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(cCOM1_TX_GPIO_CLK | cCOM1_RX_GPIO_CLK, ENABLE);

/* Enable USART clock */
RCC_APB2PeriphClockCmd(cCOM1_CLK, ENABLE);

/* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(cCOM1_TX_GPIO_PORT, cCOM1_TX_SOURCE, cCOM1_TX_AF);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(cCOM1_RX_GPIO_PORT, cCOM1_RX_SOURCE, cCOM1_RX_AF);

/* Configure USART Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = cCOM1_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(cCOM1_TX_GPIO_PORT, &GPIO_InitStructure);

/* Configure USART Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = cCOM1_RX_PIN;
GPIO_Init(cCOM1_RX_GPIO_PORT, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = ulBaudRate;
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;

/* USART configuration */
USART_Init(cCOM1, &USART_InitStructure);

//USART_ClearITPendingBit(cCOM1, USART_IT_RXNE);
//USART_ClearITPendingBit(cCOM1, USART_IT_TC);
//USART_ClearITPendingBit(cCOM1, USART_IT_TXE);

/* Enable USART RX Interrupt */
//USART_ITConfig_Boot(cCOM1, USART_IT_RXNE, ENABLE);
/* Disable USART TX Interrupt */
//USART_ITConfig_Boot(cCOM1, USART_IT_TC, DISABLE);

/* Enable USART */
USART_Cmd(cCOM1, ENABLE);

/* Enable the USART Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

/* ----------------------- Start implementation -----------------------------*/
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{
if( xRxEnable )
{
USART_ITConfig(cCOM1, USART_IT_RXNE, ENABLE);
}
else
{
USART_ITConfig(cCOM1, USART_IT_RXNE, DISABLE);
}

if( xTxEnable )
{
USART_ITConfig(cCOM1, USART_IT_TXE, ENABLE);
}
else
{
USART_ITConfig(cCOM1, USART_IT_TXE, DISABLE);
}
}

发表于 2015-11-17 11:13

NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);//分组任意选

  /* Enable the PPPInterrupts */
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
注意：不同版本的库，结构体的成员有变化（依实际为准）

发表于 2015-11-17 11:15

yklstudent 发表于 2015-11-17 11:08
刚好在弄STM32F070，跟030差不多，发个我设置的USART初始化函数；
static void xMBPortUsartInit(uint32_t ...

都是CM0的，初始化函数是通用的。

发表于 2015-11-17 11:16

本帖最后由 jjjkkk00 于 2015-11-17 11:21 编辑

刚开始入手STM32的话，还是建议使用官网的STM32Cube工具自动生成。配置起来很方便，外设（比如USART）的三种通讯方式（轮询、中断、DMA）的驱动都是直接可以用，省去了自己摸索的时间。

可以自动生成KEIL / IAR的工程文件。

STM32Cube.pdf (1.48 MB, 下载次数: 3)

发表于 2015-11-17 12:38

jjjkkk00 发表于 2015-11-17 11:13
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);//分组任意选

我的只有三个成员，那两个preemption和sub我可以不用吗，还是自己在加，但我好像加了错的

发表于 2015-11-17 12:38

jjjkkk00 发表于 2015-11-17 11:16
刚开始入手STM32的话，还是建议使用官网的STM32Cube工具自动生成。配置起来很方便，外设（比如USART）的三 ...

好，先看看

发表于 2015-11-17 14:49

jjjkkk00 发表于 2015-11-17 11:16
刚开始入手STM32的话，还是建议使用官网的STM32Cube工具自动生成。配置起来很方便，外设（比如USART）的三 ...

大哥，基于我上面的代码，我的中断处理函数应该放在哪里让他调用

发表于 2015-11-17 14:50

yklstudent 发表于 2015-11-17 11:08
刚好在弄STM32F070，跟030差不多，发个我设置的USART初始化函数；
static void xMBPortUsartInit(uint32_t ...

你的这个没有中断处理函数吗，大哥，基于我上面的代码，我的中断处理函数应该放在哪里让他调用

发表于 2015-11-17 14:56

学习了

发表于 2015-11-17 17:39

本帖最后由 jjjkkk00 于 2015-11-17 17:44 编辑

wu93111 发表于 2015-11-17 14:49
大哥，基于我上面的代码，我的中断处理函数应该放在哪里让他调用

放在类似"stm32f10x_it.c"文件中，同时在头文件(类似"stm32f10x_it.h")中申明。
重点是申明，可以在头文件中“void USART2_IRQHandler (void);”，或者在源文件中“extern void USART2_IRQHandler (void);”来获取。只要编译器能够找到，其他的不重要！

[STM32F0] 板子接收PC端发送的数据

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