求助！！ stm32f401re 串口乱码

dateher · 发表于 2017-10-28 17:38:59

新人求帮助！！

滕召群 · 发表于 2017-10-28 17:39:00

不是你程序问题,是你的串口软件上面的 HEX显示选项没勾上,所以出现乱码,勾上就能看到正常数据了

dateher · 发表于 2017-10-28 17:43:37

贴上代码：
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

//Ïàó|ê±Öóê1Äü
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE);  //ê1ÄüUSART1ê±Öó
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOB  , ENABLE); //ê1ÄüGPIOBê±Öó

//′®¿ú1¶Ôó|òy½Å¸′óÃó3éä
GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_USART1); //GPIOB9¸′óÃÎaUSART1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_USART1); //GPIOB10¸′óÃÎaUSART1

//USART1¶Ë¿úÅäÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //TX | RX
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;
GPIO_Init(GPIOB,&GPIO_InitStructure); //3õê¼»ˉPA9,PA10

NVIC_Configuration();

//USART1 3õê¼»ˉéèÖÃ
USART_InitStructure.USART_BaudRate = 115200; //2¨ìØÂêéèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;  //×Ö3¤Îa8Î»êy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;  //ò»¸öí￡Ö1Î»
USART_InitStructure.USART_Parity = USART_Parity_No ;  //ÎTÆæÅ¼¼ìÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;  //êÕ·￠Ä￡ê½
USART_Init(USART1, &USART_InitStructure);  //3õê¼»ˉ′®¿ú1

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);  //¿aÆôÏà1ØÖD¶Ï

USART_Cmd(USART1, ENABLE);  //ê1Äü′®¿ú1
}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/* Enable the USARTy Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;    //′®¿ú1ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; //ÇàÏèóÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;  //×óóÅÏè¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure);  //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷
}

/*
* oˉêyÃû￡ofputc
* Ãèêö  ￡oÖØ¶¨Ïòc¿aoˉêyprintfμ½USART1
* êäèë  ￡oÎT
* êä3ö  ￡oÎT
* μ÷óÃ  ￡oóéprintfμ÷óÃ
*/
int fputc(int ch, FILE *f)
{
/* ½&#171

rintfÄúèY·￠íù′®¿ú */
USART_SendData(USART1, (unsigned char) ch);
/* μè′y·￠Ëííê±Ï */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

return (ch);
}

/// ÖØ¶¨Ïòc¿aoˉêyscanfμ½USART1
int fgetc(FILE *f)
{
/* μè′y′®¿ú1êäèëêy¾Y */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);

return (int)USART_ReceiveData(USART1);
}

int main(void)
{
/* USART1 config 115200 8-N-1 */
USART1_Config();

printf("\r\n this is a USART Interrupt demo \r\n");

//delay(0x0FFFEF);

while (1)
{

}
}