项目中新增了一个串口后主函数卡死不能运行，急求！

PYIPHANG · 发表于 2016-8-5 21:53:24

大家好，我的项目是建立在原子的emwin无系统移植例程上的，开了串口1后，一切正常，程序能正常运行，界面也有显示。因为项目要用到串口2来与wifi通信，在我新增串口之后，程序就卡死了，也没显示 UZO0EH()L5O`XJ(TAM8YU(U.png

我试过用led灯来作指示，屏蔽usart2 configu时，灯会亮，没屏蔽时灯不亮。该函数的代码如下：GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

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

/* USART2 GPIO config */
/* Set PA2 PA3 as UART1 */
/* 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.03) 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_Cmd(USART2, ENABLE);

//Enable usart2 receive interrupt
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

里面只是做了一些简单的初始化，理论上应该并不会卡死什么的。现在弄了一天也找不出卡死的原因在哪里。请各位帮帮忙