STM32F407串口3一直不好使！！！！

2019-07-20 21:41发布

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "beep.h"
#include "key.h"

//ALIENTEK Ì½Ë÷ÕßSTM32F407¿ª·¢°å ÊµÑé4
//´®¿ÚÍ¨ÐÅÊµÑé -¿âº¯Êý°æ±¾
//¼¼ÊõÖ§³Ö£ºwww.openedv.com
//ÌÔ±¦µêÆÌ£ºhttp://eboard.taobao.com
//¹ãÖÝÊÐÐÇÒíµç×Ó¿Æ¼¼ÓÐÏÞ¹«Ë¾
//×÷Õß£ºÕýµãÔ×Ó @ALIENTEK

int main(void)
{

u8 t;
u8 len;
u16 times=0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//ÉèÖÃÏµÍ³ÖÐ¶ÏÓÅÏÈ¼¶·Ö×é2

uart_init(115200); //´®¿Ú³õÊ¼»¯²¨ÌØÂÊÎª115200
delay_init(168);  //ÑÓÊ±³õÊ¼»¯
// LED_Init();    //³õÊ¼»¯ÓëLEDÁ¬½ÓµÄÓ²¼þ½Ó¿Ú
while(1)
{
  if(USART_RX_STA&0x8000)
  {
len=USART_RX_STA&0x3fff;//µÃµ½´Ë´Î½ÓÊÕµ½µÄÊý¾Ý³¤¶È
printf(" Äú·¢ËÍµÄÏûÏ¢Îª: ");
for(t=0;t<len;t++)
{
USART_SendData(USART3, USART_RX_BUF[t]);       //Ïò´®¿Ú1·¢ËÍÊý¾Ý
while(USART_GetFlagStatus(USART3,USART_FLAG_TC)!=SET);//µÈ´ý·¢ËÍ½áÊø
}
printf(" ");//²åÈë»»ÐÐ
USART_RX_STA=0;
  }else
  {
times++;
if(times%5000==0)
{
printf(" ALIENTEK Ì½Ë÷ÕßSTM32F407¿ª·¢°å ´®¿ÚÊµÑé ");
printf("ÕýµãÔ×Ó@ALIENTEK ");
}
if(times%200==0)printf("ÇëÊäÈëÊý¾Ý,ÒÔ»Ø³µ¼ü½áÊø ");
if(times%30==0)LED0=!LED0;//ÉÁË¸LED,ÌáÊ¾ÏµÍ³ÕýÔÚÔËÐÐ.
delay_ms(10);
  }
}
}

#include "sys.h"
#include "usart.h"
//////////////////////////////////////////////////////////////////////////////////
//Èç¹ûÊ¹ÓÃucos,Ôò°üÀ¨ÏÂÃæµÄÍ·ÎÄ¼þ¼´¿É.
#if SYSTEM_SUPPORT_UCOS
#include "includes.h"    //ucos Ê¹ÓÃ
#endif

#if 1
#pragma import(__use_no_semihosting)
//±ê×¼¿âÐèÒªµÄÖ§³Öº¯Êý
struct __FILE
{
int handle;
};

FILE __stdout;
//¶¨Òå_sys_exit()ÒÔ±ÜÃâÊ¹ÓÃ°ëÖ÷»úÄ£Ê½
_sys_exit(int x)
{
x = x;
}
//ÖØ¶¨Òåfputcº¯Êý
int fputc(int ch, FILE *f)
{
while((USART3->SR&0X40)==0);//Ñ»··¢ËÍ,Ö±µ½·¢ËÍÍê±Ï
USART3->DR = (u8) ch;
return ch;
}
#endif

#if EN_USART3_RX //Èç¹ûÊ¹ÄÜÁË½ÓÊÕ
//´®¿Ú1ÖÐ¶Ï·þÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄÜ±ÜÃâÄªÃûÆäÃîµÄ´íÎó
u8 USART_RX_BUF[USART_REC_LEN];    //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ×´Ì¬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐÐ§×Ö½ÚÊýÄ¿
u16 USART_RX_STA=0;    //½ÓÊÕ×´Ì¬±ê¼Ç

//³õÊ¼»¯IO ´®¿Ú1
//bound:²¨ÌØÂÊ
void uart_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE); //Ê¹ÄÜGPIOAÊ±ÖÓ
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//Ê¹ÄÜUSART1Ê±ÖÓ

//´®¿Ú1¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3); //GPIOA9¸´ÓÃÎªUSART1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3); //GPIOA10¸´ÓÃÎªUSART1

//USART1¶Ë¿ÚÅäÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10; //GPIOA9ÓëGPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´ÓÃ¹¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍì¸´ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOB,&GPIO_InitStructure); //³õÊ¼»&macr

B11£&not

B10
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init(GPIOB,&GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_5);//GPIO_Pin_10|GPIO_Pin_11|
//USART1 ³õÊ¼»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8Î»Êý¾Ý¸ñÊ½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öÍ£Ö¹Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæÅ¼Ð£ÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
  USART_Init(USART3, &USART_InitStructure); //³õÊ¼»¯´®¿Ú1

  USART_Cmd(USART3, ENABLE);  //Ê¹ÄÜ´®¿Ú1

USART_ClearFlag(USART3, USART_FLAG_TC);

#if EN_USART3_RX
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖÐ¶Ï

//Usart1 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;//´®¿Ú1ÖÐ¶ÏÍ¨µÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏÈ¼¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3;  //×ÓÓÅÏÈ¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQÍ¨µÀÊ¹ÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯VIC¼Ä´æÆ÷¡¢

#endif

}

void USART3_IRQHandler(void)                //´®¿Ú1ÖÐ¶Ï·þÎñ³ÌÐò
{
u8 Res;
#ifdef OS_TICKS_PER_SEC //Èç¹ûÊ±ÖÓ½ÚÅÄÊý¶¨ÒåÁË,ËµÃ÷ÒªÊ¹ÓÃucosIIÁË.
OSIntEnter();
#endif
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)  //½ÓÊÕÖÐ¶Ï(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áÎ²)
{
  Res =USART_ReceiveData(USART3);//(USART1->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý

  if((USART_RX_STA&0x8000)==0)//½ÓÊÕÎ´Íê³É
  {
if(USART_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART_RX_STA=0;//½ÓÊÕ´íÎó,ÖØÐÂ¿ªÊ¼
else USART_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
   USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
   USART_RX_STA++;
   if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØÐÂ¿ªÊ¼½ÓÊÕ
}
}
  }
  }
#ifdef OS_TICKS_PER_SEC //Èç¹ûÊ±ÖÓ½ÚÅÄÊý¶¨ÒåÁË,ËµÃ÷ÒªÊ¹ÓÃucosIIÁË.
OSIntExit();
#endif
}
#endif

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