stm32f103 串口通信问题

tcvip

我的程序包括短信，打电话，服务器通信都是usart1通讯的，一切正常，现在改到usart2  A2，A3 程序不走，无任何反应，编译也正常，高手指点
void USART2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

/* config USART2 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

/* USART2 GPIO config */
/* Configure USART2 Tx (PA.02) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);   
/* Configure USART2 Rx (PA.3) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* USART2 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

USART_Cmd(USART2, ENABLE);
}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */  
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

/* Enable the USARTy Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;  
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

/*
* º¯ÊýÃû£ºfputc
* ÃèÊö  £ºÖض¨Ïòc¿âº¯Êýprintfµ½USART2
* ÊäÈë  £ºÎÞ
* Êä³ö  £ºÎÞ
* µ÷Óà £ºÓÉprintfµ÷ÓÃ
*/
int fputc(int ch, FILE *f)
{
/* ½&laquorintfÄÚÈÝ·¢Íù´®¿Ú */
USART_SendData(USART2, (unsigned char) ch);
while (!(USART2->SR & USART_FLAG_TXE));

return (ch);
}

flyleaf

中断函数名改了没

tcvip

flyleaf 发表于 2017-5-26 18:48
中断函数名改了没

void NVIC_Configuration(void)
{
        NVIC_InitTypeDef NVIC_InitStructure;
        /* Configure the NVIC Preemption Priority Bits */  
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
       
        /* Enable the USARTy Interrupt */
        NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;         
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
}  这个有问题吗，该改的我也改了