我把例程的串口1改成2了可中断进不去大家帮忙看看

z2500053109 · 发表于 2014-12-15 14:25:39

[mw_shl_code=c,true]void uart_init(u32 bound){ //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //使能USART1，GPIOB时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PB,PE端口时钟 USART_DeInit(USART2); //复位串口1 //USART1_TX PA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PB.8 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PB8 //USART1_RX PA.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PB9 //Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器 //USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;//一般设置为9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式 USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位 USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制 USART_InitStructure.USART_Mode = USART_Mode_Rx;// | USART_Mode_Tx; //收发模式 USART_Init(USART2, &USART_InitStructure); //初始化串口 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启中断 USART_Cmd(USART2, ENABLE); //使能串口 PM=8; }[/mw_shl_code]

下面是中断服务函数

[mw_shl_code=c,true]void USART2_IRQHandler(void) //串口1中断服务程序 { u8 Res; static u8 i=0; static u8 rec_flag=0; PM=6; #ifdef OS_TICKS_PER_SEC //如果时钟节拍数定义了,说明要使用ucosII了. OSIntEnter(); #endif if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断 { PM=7; USART_ClearFlag(USART2,USART_FLAG_RXNE); // USART_ClearITPendingBit(USART1, USART_IT_RXNE); Res =USART_ReceiveData(USART2);//(USART1->DR); //读取接收到的数据 // PM=1; if (0xaa==Res) { // PM=2; rec_flag=1; } if (1==rec_flag) { USART_RX_BUF[i++]=Res; if (7==i) { i=0; rec_flag=0; } // PM=3; } if (USART_RX_BUF[4]==(USART_RX_BUF[0]+USART_RX_BUF[1]+USART_RX_BUF[2]+USART_RX_BUF[3]))//检验码 Data_pd=1;//接受到的数据正确 else Data_pd=0; if (Data_pd==1) Get_PM=1; else Get_PM=0; // delay_ms(9); // PM=4; } #ifdef OS_TICKS_PER_SEC //如果时钟节拍数定义了,说明要使用ucosII了. OSIntExit(); #endif } */[/mw_shl_code]

我做过一些调试 [mw_shl_code=c,true]if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)一直没有满足条件 [/mw_shl_code]