为什么使用USART接收的数据都是同一个-xuyaqi的回答

STM32

为什么使用USART接收的数据都是同一个

2019-07-20 17:02发布

站内问答 / STM32/STM8

1463 8

USART2接收的数据

代码

如上图所示，USART2接收的数据，全部代码如下：
/****************************************Copyright (c)****************************************************
**
**
**
**--------------File Info---------------------------------------------------------------------------------
** File name:             uctsk_Blink.c
** Descriptions:          The uctsk_Blink application function
**
**--------------------------------------------------------------------------------------------------------
** Created by:             AVRman
** Created date:          2016-2-6
** Version:                v1.0
** Descriptions:          The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
*********************************************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include <includes.h>
#include "ip.h"
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include "netif/loopif.h"
#include "search.h"
#include "sockets.h"
#include "lwIP.h"
#include "netif.h"

/* Private variables ---------------------------------------------------------*/
static  OS_STK       App_TaskExhaustkStk[APP_TASK_EXHAUST_STK_SIZE];
static  OS_STK       App_TaskLWIPReceiveStk[APP_TASK_LWIPRECEIVE_STK_SIZE];
static void USART_START(INT32U baud_rate);
static void USART_SendStr(int *pucStr,int ulNum);//·￠ËíÖ¸áîoˉêy
static void USART_ReceiveStr(int *recv,int len);
static void USART_RecvData();
static void USART2_IRQHandler2() ;
static void GPIO_Configuration(void);
static void GPIO_LedOn(void);
static void GPIO_LedOn3(void);
static void NVIC_Configure(void);

/* Private function prototypes -----------------------------------------------*/
static void uctsk_ExhaustAna       ();
static void uctsk_LWIPReceive    (void);

int socket;
int Uart2_Rx;
int Uart2_Tx;
int Uart2_Len;
int Uart2_Sta=0;
int Uart2_Buffer[140];//êy¾Y3¤¶è
int Uart2_Buffer1[140];
int Status;//×′ì¬
int Res;
int TOPLC[10];

//static void usartReceive(int*Uart2_Rx,int Uart2_Len);

void  App_ExhaustAnaTaskCreate (void)
{
CPU_INT08U  os_err;

os_err = os_err; /* prevent warning... */

os_err = OSTaskCreate((void (*)(void *)) uctsk_ExhaustAna,
                        (void       * ) 0,
                        (OS_STK       * )&App_TaskExhaustkStk[APP_TASK_LWIPRECEIVE_STK_SIZE - 1],
                        (INT8U          ) APP_TASK_EXHAUST_PRIO  );

#if OS_TASK_NAME_EN > 0
OSTaskNameSet(APP_TASK_EXHAUST_PRIO, " Task Exhaust Analyze", &os_err);
#endif

}

void  App_LWIPReceiveTaskCreate (void)
{
CPU_INT08U  os_err;

os_err = os_err; /* prevent warning... */

os_err = OSTaskCreate((void (*)(void *)) uctsk_LWIPReceive,
                        (void       * ) 0,
                        (OS_STK       * )&App_TaskLWIPReceiveStk[APP_TASK_EXHAUST_STK_SIZE - 1],
                        (INT8U          ) APP_TASK_LWIPRECEIVE_PRIO  );

#if OS_TASK_NAME_EN > 0
OSTaskNameSet(APP_TASK_LWIPRECEIVE_PRIO, " Task LWIPReceive ", &os_err);
#endif

}

static void uctsk_LWIPReceive    (void)
{

int err;
// int newsocetTemp;
struct ip_addr ipaddr;
char recvbuff[100];
u32_t len;
struct sockaddr_in sin;
struct sockaddr_in adressClient;
struct sockaddr sockaddr_name;
uint8_t dataH=0,dataL=0;
uint16_t enginespeed=0,pedal=0;
uint16_t count=0;

Ethernet_Initialize();

Init_lwIP();

lwip_socket_init();
  // SpeedTansducer_Init();

IP4_ADDR(&ipaddr, 192, 168, 0, 1 );
socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_port = htons(2600);
sin.sin_addr.s_addr = ipaddr.addr;
sockaddr_name=  *((const struct sockaddr*)&sin);
//  bind(socket,(const struct sockaddr*)&sin,sizeof( struct sockaddr));

len=sizeof(struct sockaddr);
  // listen(socket,5);
err=connect(socket,(const struct sockaddr*)&sin,sizeof( struct sockaddr));

  // if(USART_GetITStatus(USART2,USART_IT_RXNE)!=RESET)

}

static void uctsk_ExhaustAna ()
{

int increase=0;
int  receive[120];

int measure[6]={0xAA,0x03,0x43,0x16,0x01,0xA3};
int stop[6]={0xAA,0x03,0x43,0x16,0x00,0xA4};
int check[7]={0xAA, 0x04 ,0x43 ,0x11, 0xFF, 0x01 ,0xA8};
USART_START(9600);
USART_SendStr(measure,6);
   USART_ITConfig(USART2, USART_IT_TXE, DISABLE);
   //USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

OSTimeDlyHMSM(0, 0, 3, 0);

while(1)
{
USART_SendStr(check,7);
OSTimeDlyHMSM(0, 0,5, 0);
      USART_ITConfig(USART2, USART_IT_TXE, DISABLE);
      //USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

USART2_IRQHandler2();
OSTimeDlyHMSM(0, 0,1, 0);

}

  }


/*·￠ËíÖ¸áî*/
static void USART_SendStr(int *pucStr,int ulNum)    //·￠Ëíò»′®Ö¸áî
{
int i;

for(i=0;i<ulNum;i++)
{
//while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET);
while(USART_GetFlagStatus(USART2,USART_FLAG_TXE)==RESET);
USART_SendData(USART2,*pucStr++);

   OSTimeDlyHMSM(0, 0,0, 10);


}
}

/*USARTÅäÖÃÇé¿ö*/
static void USART_START(INT32U baud_rate)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

  /*RCC  Configuration*/
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO ,ENABLE);

  RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2 ,ENABLE);

   /*GPIO Configuration*/
  GPIO_PinRemapConfig(GPIO_Remap_USART2,ENABLE);

  /*
  *  USART2_TX -> PD5 , USART2_RX -> PD6
  */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

   /*NVIC Configuration*/
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

  /*USART Configuration*/
  USART_InitStructure.USART_BaudRate = baud_rate;
  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_Init(USART2, &USART_InitStructure);
  USART_ClearFlag(USART2,USART_FLAG_TC);
  USART_Cmd(USART2, ENABLE);

}

static void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD , ENABLE);
/**
*  LED1 -> PD2 , LED2 -> PD3 , LED3 -> PD4 , LED4 -> PD7
*/
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}

/************************************************************************/
/******************************ÖD¶Ï½óêÕêy¾Y*************************/

void USART2_IRQHandler2(void)
{

if(USART_GetFlagStatus(USART2,USART_IT_RXNE)==SET) //½óêÕÖD¶ÏóDD§
{
   USART_ClearITPendingBit(USART2,USART_IT_RXNE);//Çå3yÖD¶Ï±êÖ¾
   for(Uart2_Rx=0;Uart2_Rx<140;Uart2_Rx++)
   {
Uart2_Buffer[Uart2_Rx] = USART_ReceiveData(USART2);//·μ»ØUSART2½óêÕμÄ×î½üêy¾Y
   USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
   //Uart2_Rx = (Uart2_Rx + 1) % 140;
   }
}

}

/*********************************************************************************************************
   END FILE
*********************************************************************************************************/

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8条回答

xuyaqi

2019-07-21 13:31

天涯下的彩虹发表于 2017-2-7 11:59
现在是可以在中断里面写接收数据了，但是接收的数据全都为空

如果你用串口调试能正确接收，而单片机不能正常接收显然是程序问题，串口中断接收数组网上例程很多可以拿来参考。

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