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1、软件：KeilMDK芯片：STM32F103/STM32F107串口数量：4备注：4个串口均配置为DMA读取/串口1初始化函数void uart1_init(u32 bound) /GPIO端口设置GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);/使能USART1，GPIOA时
2、钟USART_DeInit(USART1); /复位串口1/USART1_TX PA.9GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; /PA.9GPIO_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PA9/USART1_RX PA.10GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;GP
3、IO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;/浮空输入GPIO_Init(GPIOA, &GPIO_InitStructure); /初始化PA10/Usart1 NVIC 配置NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ;/抢占优先级3NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/子优先级3NVIC_InitStruc
4、ture.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/*Enable DMA Channel4 Interrupt */NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;NVIC_InitStruc
5、ture.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);/*Enable DMA Channel5 Interrupt */NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;NVIC_InitStructure.NVIC_IRQChannelCmd =
6、 ENABLE;NVIC_Init(&NVIC_InitStructure);/USART 参数初始化设置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_
7、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(USART1, &USART_InitStructure); /初始化串口/ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);/开启中断USART_ITConfig(USART1, USART_IT_IDLE , ENABLE);/开
8、启空闲中断USART_Cmd(USART1, ENABLE); /使能串口 /串口2初始化函数void uart2_init(u32 bound)GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);/使能GPIOA时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);/
9、使能USART2时钟GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;/PA2GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;/复用推挽GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;/PA3GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; /浮空输入GP
10、IO_Init(GPIOA, &GPIO_InitStructure); RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,ENABLE);/复位串口2RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,DISABLE);/停止复位USART_InitStructure.USART_BaudRate = bound;/一般设置为9600;USART_InitStructure.USART_WordLength = USART_WordLength_8b;/8位数据长度USART_InitStructure.USART
11、_StopBits = USART_StopBits_1;/一个停止位USART_InitStructure.USART_Parity = USART_Parity_No;/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NV
12、IC_InitStructure.NVIC_IRQChannel = USART2_IRQn; /使能串口2中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; /先占优先级2级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; /从优先级2级NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; /使能外部中断通道NVIC_Init(&NVIC_InitStructure); /根据NVIC_InitStruct中指定的参数初始化外设NV
13、IC寄存器/Enable DMA Channel7 Interrupt /NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel7_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);/*Enable DMA Channel6
14、Interrupt */NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);/ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);/开启中断USART_ITConfig(USART2, USART_IT_IDLE , ENABLE);/开启空闲中断USART_Cmd(USART2, ENABLE); /使能串口 /串口3初始化函数void uart3_init(u32 bou
