F4的板子为什么同样串口一，用原子例程没现象，多加一句函数就有现象了？

MWXFL · 发表于 2018-8-20 08:19:53

原子的
[mw_shl_code=applescript,true]#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"

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//×÷Õß￡oÕyμãÔ-×ó @ALIENTEK

void My_USART1_Init(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ê1ÄüUSART1ê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;

USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1 ,ENABLE);

USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
}

void USART1_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
res=USART_ReceiveData(USART1);
USART_SendData(USART1,res);
}

}
int main(void)
{
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
My_USART1_Init();
while(1);
}
[/mw_shl_code]

多一句函数的
#include "includes.h"
#include "stm32f4xx.h"
#include "USART.h"

void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStruct;
NVIC_InitTypeDef NVIC_InitStructure;
//////////////////////ê±ÖóÅäÖÃ//////////////////////////////
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); //′ò¿aGPIOê±Öó
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); //′ò¿a′®¿úê±Öó

//////////////////////¶Ë¿úÅäÖÃ//////////////////////////////
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1); //¶Ë¿úÖØó3éä
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1); //¶Ë¿úÖØó3éä

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //íÆíìÄ￡ê½
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //éÏà-Ä￡ê½
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //±¸óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //êä3öÆμÂê

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //Ñ¡ÔñTXòy½Å
GPIO_Init(GPIOA, &GPIO_InitStructure); //ÅäÖÃ

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //Ñ¡ÔñRXòy½Å
GPIO_Init(GPIOA, &GPIO_InitStructure); //ÅäÖÃ

//////////////////////USARTÅäÖÃ//////////////////////////////
USART_InitStruct.USART_BaudRate = 9600; //ÅäÖÃ2¨ìØÂê
USART_InitStruct.USART_WordLength = USART_WordLength_8b; //êy¾YÎ»Îa8Î»
USART_InitStruct.USART_StopBits = USART_StopBits_1; //í￡Ö1Î»Îa1Î»
USART_InitStruct.USART_Parity = USART_Parity_No; //ÎTÆæÅ¼D￡Ñé
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//á÷¿ØÖÆ ÎT
USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//ê1Äü·￠Ëí½óêÕ
USART_Init(USART1, &USART_InitStruct); //ÅäÖÃ3õê¼»ˉ
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //ê1Äü½óêÕÖD¶Ï
USART_Cmd(USART1, ENABLE); //′ò¿a′®¿ú￡¬¿aê¼1¤×÷

/////////////////////////óÅÏè¼¶ÅäÖÃ////////////////////////////////
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //Ç¶ì×·Ö×é2
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;      //ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //Ö¸¶¨ÇàÕ¼ê½óÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //Ö¸¶¨Ïìó|óÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //ÆôóÃÖD¶Ï
NVIC_Init(&NVIC_InitStructure);
}
//1|Äü½ééü￡o′®DDí¨DÅ»Øμ÷oˉêy
//·μ»ØÖμ  ￡oÎT
//2Îêy ￡oÎT
void USART1_IRQHandler(void)
{
unsigned char dat;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //2éÑˉÖD¶Ï
{
dat = USART_ReceiveData(USART1); //½óêÕêy¾Y￡¬±￡′æÔúdatÄú

//′òó¡oˉêyò»°ã2»ÔùÖD¶ÏàïÃæμ÷óÃ￡¬Õaàï½ö×÷ÎaÑYê¾ê1óÃ￡¬ÇëÎeÄ￡·Â
printf("½óêÕêy¾Y￡o%c\r\n",dat);
}

}
//1|Äü½ééü￡oprintfÖØ¶¨Ïò
//·μ»ØÖμ  ￡oÎT
//2Îêy ￡o
int fputc(int ch, FILE *f)
{
  USART_SendData(USART1, (uint8_t) ch); //·￠Ëíêy¾Y
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET); //μè′y·￠Ëííê±Ï
  return ch;
}

int main(void)
{
USART_Configuration(); //′®DDí¨DÅ3õê¼»ˉ
USART_ClearFlag(USART1,USART_FLAG_TC); //Çå3y·￠Ëííê3é±êÖ¾Î»￡¬Ïû3yμúò»¸ö×Ö½ú¶aê§BUG￡¬½¨òé·ÅÔúμúò»′Îêy¾Y·￠ËíÇ°Ãæ
while(1);
}

正点原子 · 发表于 2018-8-21 02:04:48

直接下载我们例程测试下

MWXFL · 发表于 2018-8-21 09:54:07

正点原子发表于 2018-8-21 02:04
直接下载我们例程测试下

就是直接用的例程没有反应，然后再加一句函数就可以了，

MWXFL · 发表于 2018-8-21 09:55:49

正点原子发表于 2018-8-21 02:04
直接下载我们例程测试下

那个例程也是没有反应的，准确说是出来乱码

Psheng · 发表于 2018-8-21 10:09:52

没看出来加了那句。。。

MWXFL · 发表于 2018-8-21 11:19:04

Psheng 发表于 2018-8-21 10:09
没看出来加了那句。。。

int fputc(int ch, FILE *f)
{
  USART_SendData(USART1, (uint8_t) ch);
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
  return ch;
}

加了这个函数