|
使用的的库函数编写的程序,想用中断接收数据然后用的printf发送的数据。使用的是USART2接收数据然后使用USART1发送数据。
加了中断设置之后进入printf就进入死循环了怎么办,好像是无法检测到发送标志,该怎么处理呢。
/*************************************************************
* 中断初始化函数
*************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0X0000);
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/* Enable the USART1 Interrupt */ //之前把USART1的中断设置取消了也不行
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the USART2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*************************
* 主函数
**************************/
int main(void)
{
USART_InitTypeDef USART_InitStructure; //串口结构体定义
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
SystemInit(); //时钟初始化
NVIC_Configuration();
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_config(); //GPIO端口初始化
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;
STM_EVAL_COMInit(COM1, &USART_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_Init(USART2, &USART_InitStructure); //串口2初始化函数
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
USART_Cmd(USART2, ENABLE);
printf("串口成功%d\r\n",SystemCoreClock);
printf("串口成功%d\r\n",SystemCoreClock);
/*主循环 */
while (1)
{
if(cycle!=0)
{
printf("周期是%d.%ds\r\n",cycle/100,cycle%100);
cycle=0;
}
}
}
/*******************************************************************************
* 串口打印函数
*******************************************************************************/
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
/*串口2中断处理函数*/
void USART2_IRQHandler(void)
{
static u8 a=0;
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断
{
/* Read one byte from the receive data register */
RXbuffer[a++] = USART_ReceiveData(USART2); //接收串口2的数据存到RXbuffer
if(a==12 || RXbuffer[a]=='\0') //判断接收完成
{
a=0;
cycle=(u32)(RXbuffer[8]<<8)+RXbuffer[9];
//printf("周期是%d.%ds\r\n",cycle/100,cycle%100);
//USART_ITConfig(USART1, USART_IT_TXE, ENABLE);//当接收完成时打开串口1发送中断
}
}
/*if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET) //判断发送中断
{
USART_SendData(USART2,RXbuffer1[a++]); //发送buffer数据
if(a==9 || RXbuffer1[a]=='\0')
{
a=0;
USART_ITConfig(USART2, USART_IT_TXE, DISABLE);//发送中断关闭
}
}*/
}
|
|