原子的
[mw_shl_code=applescript,true]#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"
//ALIENTEK ì½Ë÷ÕßSTM32F407¿a·¢°å êμÑé0
//STM32F41¤3ìÄ£°å-¿aoˉêy°æ±¾
//¼¼êõÖ§3Ö£o
www.openedv.com
//ìÔ±|μêÆì£o
http://eboard.taobao.com
//1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾
//×÷ÕߣoÕyμãÔ-×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; //êy¾YλÎa8λ
USART_InitStruct.USART_StopBits = USART_StopBits_1; //í£Ö1λÎa1λ
USART_InitStruct.USART_Parity = USART_Parity_No; //ÎTÆæżD£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¤×÷
/////////////////////////óÅÏ輶ÅäÖÃ////////////////////////////////
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //Ƕì×·Ö×é2
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //Ö¸¶¨ÇàÕ¼ê½óÅÏ輶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //Ö¸¶¨Ïìó|óÅÏ輶
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
",dat);
}
}
//1|Äü½ééü£oprintfÖض¨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±ê־룬Ïû3yμúò»¸ö×Ö½ú¶aê§BUG£¬½¨òé·ÅÔúμúò»′Îêy¾Y·¢ËíÇ°Ãæ
while(1);
}
就是直接用的例程没有反应,然后再加一句函数就可以了,
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
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