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	积分10金钱10 注册时间2023-11-28在线时间3 小时 | 
 
1金钱 
| 串口1、串口3分别接两个设备,也配置了中断优先级,秒定时中断来采集两个设备的数据。即每秒向两个串口分别发送一次数据采集任务。 故障现象:单独接一个设备,通讯数据正常,两个设备同时接上时,串口3接收的数据不完整。附部分代码,求指导!
 void USART1_Init(void)
 {
 GPIO_InitTypeDef GPIO_InitStructure;
 USART_InitTypeDef USART_InitStructure;
 NVIC_InitTypeDef NVIC_InitStructure;
 
 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//定义MCU中断类型为16级抢断式
 
 GPIO_InitStructure.GPIO_Pin = USART1_TX_PIN;        //串口发送引脚配置
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_Init(USART1_TX_PORT, &GPIO_InitStructure);
 
 GPIO_InitStructure.GPIO_Pin = USART1_RX_PIN;        //串口接收引脚配置
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
 GPIO_Init(USART1_RX_PORT, &GPIO_InitStructure);
 
 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
 
 USART_StructInit(&USART_InitStructure);             //初始化USART1
 USART_InitStructure.USART_BaudRate = 9600;                //配置波特率
 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_Tx | USART_Mode_Rx ;
 USART_Init(USART1, &USART_InitStructure);
 
 //    GPIO_InitStructure.GPIO_Pin = USART1_RS485_PIN;     //USART1_RS485
 //    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 //    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
 //    GPIO_Init(USART1_RS485_PORT, &GPIO_InitStructure);
 //    USART1_RS485_DISABLE;                               //USART1_RS485发送失能
 
 USART_ITConfig(USART1, USART_IT_TC, ENABLE);
 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
 USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
 USART_Cmd(USART1, ENABLE);
 }
 
 void USART3_Init(void)
 {
 GPIO_InitTypeDef GPIO_InitStructure;
 USART_InitTypeDef USART_InitStructure;
 NVIC_InitTypeDef NVIC_InitStructure;
 
 GPIO_InitStructure.GPIO_Pin = USART3_TX_PIN;        //TX发送引脚配置
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_Init(USART3_TX_PORT, &GPIO_InitStructure);
 
 GPIO_InitStructure.GPIO_Pin = USART3_RX_PIN;        //RX接收引脚配置
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
 GPIO_Init(USART3_RX_PORT, &GPIO_InitStructure);
 
 NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
 
 USART_InitStructure.USART_BaudRate = 9600;          //设置波特率
 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(USART3, &USART_InitStructure);
 
 GPIO_InitStructure.GPIO_Pin = USART3_RS485_PIN;     //USART3_RS485
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
 GPIO_Init(USART3_RS485_PORT, &GPIO_InitStructure);
 USART3_RS485_DISABLE;                               //USART3_RS485失能
 
 USART_ITConfig(USART3, USART_IT_TC, ENABLE);
 USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
 USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);
 USART_Cmd(USART3, ENABLE);
 }
 
 
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