如何使用stm32F407ZGT6单片机串口实现串行通信（要求：不能使用串口1）
加急，解决好问题可以加赏. 如何使用stm32F407ZGT6单片机串口实现串行通信（要求：不能使用串口1）
把代码里和配置里的USART1都换成其它串口即可。
要串行通信啊！！
串口编写程序如：
//usart.c
#include "sys.h"
#include "usart.h"
//AlwaySun 2020/01/05
//»ùÓÚÕýµãÔ×Ó¹¤³ÌÐÞ¸Ä
//ºê¶¨Òå´®¿Ú½ÓÊܳ¤¶ÈºÍʹÄÜ´®¿Ú
#if SYSTEM_SUPPORT_OS
#include "includes.h" //ucos ʹÓÃ
#endif
#if 1
#pragma import(__use_no_semihosting)
//±ê×¼¿âÐèÒªµÄÖ§³Öº¯Êý
struct __FILE
{
int handle;
};
FILE __stdout;
//¶¨Òå_sys_exit()ÒÔ±ÜÃâʹÓðëÖ÷»úģʽ
void _sys_exit(int x)
{
x = x;
}
//Öض¨Òåfputcº¯Êý
int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//Ñ»··¢ËÍ,Ö±µ½·¢ËÍÍê±Ï
USART1->DR = (u8) ch;
return ch;
}
#endif
#if EN_USART1_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú1ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART_RX_BUF[USART_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯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_GPIOA,ENABLE); //ʹÄÜGPIOAʱÖÓ
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ʹÄÜUSART1ʱÖÓ
//´®¿Ú1¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9¸´ÓÃΪUSART1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10¸´ÓÃΪUSART1
//USART1¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9ÓëGPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOA,&GPIO_InitStructure); //³õʼ»¯PA9£¬PA10
//USART1 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART1, &USART_InitStructure); //³õʼ»¯´®¿Ú1
USART_Cmd(USART1, ENABLE); //ʹÄÜ´®¿Ú1
//USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//´®¿Ú1ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART1_IRQHandler(void) //´®¿Ú1ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(USART1);//(USART1->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
if((USART_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
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,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
#if EN_USART2_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú2ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART2_RX_BUF[USART2_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART2_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯IO ´®¿Ú2
//bound:²¨ÌØÂÊ
void uart2_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ʹÄÜGPIOAʱÖÓ
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//ʹÄÜUSART2ʱÖÓ
//´®¿Ú2¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2); //GPIOA2¸´ÓÃΪUSART2
GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2); //GPIOA3¸´ÓÃΪUSART2
//USART2¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; //GPIOA2ÓëGPIOA3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOA,&GPIO_InitStructure); //³õʼ»¯PA2£¬PA3
//USART2 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART2, &USART_InitStructure); //³õʼ»¯´®¿Ú1
USART_Cmd(USART2, ENABLE); //ʹÄÜ´®¿Ú2
#if EN_USART2_RX
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart2 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//´®¿Ú2ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART2_IRQHandler(void) //´®¿Ú2ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(USART2);//(USART2->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
if((USART2_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART2_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART2_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
else USART2_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART2_RX_STA|=0x4000;
else
{
USART2_RX_BUF[USART2_RX_STA&0X3FFF]=Res ;
USART2_RX_STA++;
if(USART2_RX_STA>(USART2_REC_LEN-1))USART2_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
//´®¿Ú3
#if EN_USART3_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú3ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART3_RX_BUF[USART3_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART3_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯IO ´®¿Ú3
//bound:²¨ÌØÂÊ
void uart3_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE); //ʹÄÜGPIOBʱÖÓ
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//ʹÄÜUSART3ʱÖÓ
//´®¿Ú3¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3); //GPIOB10¸´ÓÃΪUSART3
GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3); //GPIOB11¸´ÓÃΪUSART3
//USART3¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; //GPIOB10 GPIOB11
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOB,&GPIO_InitStructure); //³õʼ»¯GPIOB11£¬GPIOB10
//USART3 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
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); //³õʼ»¯´®¿Ú3
USART_Cmd(USART3, ENABLE); //ʹÄÜ´®¿Ú3
//USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART3_RX
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;//´®¿Ú3ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART3_IRQHandler(void) //´®¿Ú3ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(USART3);//(USART3->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
if((USART3_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART3_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART3_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
else USART3_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART3_RX_STA|=0x4000;
else
{
USART3_RX_BUF[USART3_RX_STA&0X3FFF]=Res ;
USART3_RX_STA++;
if(USART3_RX_STA>(USART3_REC_LEN-1))USART3_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
//´®¿Ú4
#if EN_USART4_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú1ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART4_RX_BUF[USART4_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART4_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯IO ´®¿Ú4
//bound:²¨ÌØÂÊ
void uart4_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ʹÄÜGPIOAʱÖÓ
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);//ʹÄÜUSART4ʱÖÓ
//´®¿Ú4¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_UART4); //GPIOA0¸´ÓÃΪUSART4
GPIO_PinAFConfig(GPIOA,GPIO_PinSource1,GPIO_AF_UART4); //GPIOA1¸´ÓÃΪUSART4
//USART4¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; //GPIOA0ÓëGPIOA1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOA,&GPIO_InitStructure); //³õʼ»¯PA0£¬PA1
//USART4 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(UART4, &USART_InitStructure); //³õʼ»¯´®¿Ú4
USART_Cmd(UART4, ENABLE); //ʹÄÜ´®¿Ú4
//USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART4_RX
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart4 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;//´®¿Ú4ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART4_IRQHandler(void) //´®¿Ú4ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(UART4);//(USART4->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
if((USART4_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART4_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART4_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
else USART4_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART4_RX_STA|=0x4000;
else
{
USART4_RX_BUF[USART4_RX_STA&0X3FFF]=Res ;
USART4_RX_STA++;
if(USART4_RX_STA>(USART4_REC_LEN-1))USART4_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
//´®¿Ú5
#if EN_USART5_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú1ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART5_RX_BUF[USART5_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART5_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯IO ´®¿Ú5
//bound:²¨ÌØÂÊ
void uart5_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //ʹÄÜGPIOCʱÖÓ
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE); //ʹÄÜGPIODʱÖÓ
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5,ENABLE);//ʹÄÜUSART5ʱÖÓ
//´®¿Ú1¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOC,GPIO_PinSource12,GPIO_AF_UART5); //GPIOC12¸´ÓÃΪUSART5
GPIO_PinAFConfig(GPIOD,GPIO_PinSource2,GPIO_AF_UART5); //GPIOD2¸´ÓÃΪUSART5
//USART5¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //GPIOC12
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOC,&GPIO_InitStructure); //³õʼ»¯PC12
//USART5¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //GPIOD2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOD,&GPIO_InitStructure); //³õʼPD2
//USART5 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(UART5, &USART_InitStructure); //³õʼ»¯´®¿Ú5
USART_Cmd(UART5, ENABLE); //ʹÄÜ´®¿Ú5
#if EN_USART5_RX
USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;//´®¿Ú5ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART5_IRQHandler(void) //´®¿Ú5ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(UART5);//(USART5->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
//USART_SendData(UART5,Res);
if((USART5_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART5_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART5_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
else USART5_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART5_RX_STA|=0x4000;
else
{
USART5_RX_BUF[USART5_RX_STA&0X3FFF]=Res ;
USART5_RX_STA++;
if(USART5_RX_STA>(USART5_REC_LEN-1))USART5_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
//´®¿Ú6
#if EN_USART6_RX //Èç¹ûʹÄÜÁ˽ÓÊÕ
//´®¿Ú6ÖжϷþÎñ³ÌÐò
//×¢Òâ,¶ÁÈ¡USARTx->SRÄܱÜÃâĪÃûÆäÃîµÄ´íÎó
u8 USART6_RX_BUF[USART6_REC_LEN]; //½ÓÊÕ»º³å,×î´óUSART_REC_LEN¸ö×Ö½Ú.
//½ÓÊÕ״̬
//bit15£¬ ½ÓÊÕÍê³É±êÖ¾
//bit14£¬ ½ÓÊÕµ½0x0d
//bit13~0£¬ ½ÓÊÕµ½µÄÓÐЧ×Ö½ÚÊýÄ¿
u16 USART6_RX_STA=0; //½ÓÊÕ״̬±ê¼Ç
//³õʼ»¯IO ´®¿Ú6
//bound:²¨ÌØÂÊ
void uart6_init(u32 bound){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //ʹÄÜGPIOCʱÖÓ
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6,ENABLE);//ʹÄÜUSART6ʱÖÓ
//´®¿Ú6¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_USART6); //GPIOC6¸´ÓÃΪUSART6
GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_USART6); //GPIOAC7¸´ÓÃΪUSART6
//USART6¶Ë¿ÚÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; //GPIOC6ÓëGPIOC7
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOC,&GPIO_InitStructure); //³õʼ»¯PC6£¬PC7
//USART6 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART6, &USART_InitStructure); //³õʼ»¯´®¿Ú1
USART_Cmd(USART6, ENABLE); //ʹÄÜ´®¿Ú6
#if EN_USART6_RX
USART_ITConfig(USART6, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ
//Usart6 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;//´®¿Ú6ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif
}
void USART6_IRQHandler(void) //´®¿Ú6ÖжϷþÎñ³ÌÐò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART6, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
Res =USART_ReceiveData(USART6);//(USART6->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
if((USART6_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
{
if(USART6_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
{
if(Res!=0x0a)USART6_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
else USART6_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
}
else //»¹Ã»ÊÕµ½0X0D
{
if(Res==0x0d)USART6_RX_STA|=0x4000;
else
{
USART6_RX_BUF[USART6_RX_STA&0X3FFF]=Res ;
USART6_RX_STA++;
if(USART6_RX_STA>(USART6_REC_LEN-1))USART6_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ
}
}
}
}
#if SYSTEM_SUPPORT_OS //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();
#endif
}
#endif
详细参考：https://blog.csdn.net/qq_34020487/article/details/103851107
代码中有中文乱码不用管
你这个问题出现基本上是出现在了端口复用上，建议使用hal库进行开发，配置完成基本就可以通信了，如还不行可以联系我，