stm32串口间通信实验.doc

STM32串口间通信该工程主要实现了两块实验板之间的通信以及接收实验板和PC间的通信，通过发送实验板串口1发送数据，然后由接受实验板串口3接收数据后再又串口1发送出去通过PC查看实验效果。发送串口及子函数配置：#include sys.h#include usart.h/ char USART_TX_BUF12=0123456789rn; /发送缓冲 void uart_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|RCC_APB2Periph_AFIO, ENABLE); /USART1_TX PA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /USART1_RX PA.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /Usart1 NVIC 配置 /NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;/NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;/NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;/NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/IRQ通道使能/NVIC_Init(&NVIC_InitStructure);/根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器USART1 /USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;/一般设置为9600;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(USART1, &USART_InitStructure); USART_ITConfig(USART1, USART_IT_TXE, ENABLE);/开启中断 USART_Cmd(USART1, ENABLE); /使能串口 void Put_String(u8 *p) while(*p) USART_SendData(USART1, *p+); while(USART_GetFlagStatus(USART1, USART_FLAG_TXE)= RESET) USART_ClearITPendingBit(USART1, USART_IT_TXE); /这些函数很有用所以附上来了void Uart_PutChar(u8 ch) USART_SendData(USART1, (u8) ch); while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) = RESET) USART_ClearITPendingBit(USART1, USART_IT_TXE); /return ch; void Uart_PutString(u8* buf,u8 len) u8 i;for(i=0;i12) i=0; LED0=!LED0; delay_ms(250); 接收端串口及子函数配置#include sys.h#include usart.h/*串口试验*/char USART_RX_BUF12; /接收缓冲,最大12个字节.u8 Rx_Lenght; u8 Rx_flg;void uart_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|RCC_APB2Periph_AFIO, ENABLE); /USART1_TX PA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /USART1_RX PA.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /Usart1 NVIC 配置 /NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;/NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;/NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;/NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/IRQ通道使能/NVIC_Init(&NVIC_InitStructure);/根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器USART1 /USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;/一般设置为9600;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(USART1, &USART_InitStructure); USART_ITConfig(USART1, USART_IT_TXE, ENABLE);/开启中断 USART_Cmd(USART1, ENABLE); /使能串口 void uart3_init(u32 bound) GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); /USART1_TX PB.9 PB.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); /USART1_RX PB11GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); /Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;NVIC_InitStructure.NVIC_IRQChannelSubPriority =1;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/IRQ通道使能NVIC_Init(&NVIC_InitStructure);/根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器USART1 /USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;/一般设置为9600;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); USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);/开启中断串口3 USART_Cmd(USART3, ENABLE); /使能串口3 /*void USART1_IRQHandler(void) /串口1中断服务程序/u8 i=0;if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET) /接收中断(接收到的数据必须是0x0d 0x0a结尾) flag1=1; USART_ClearITPendingBit(USART1, USART_IT_TXE); /USART_SendData(USART1, USART_RX_BUFi+); elseflag1=0;*/ /*void USART3_IRQHandler(void) /串口3中断服务程序/u8 i=0;if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) /接收中断(接收到的数据必须是0x0d 0x0a结尾) flag3=1; USART_ClearITPendingBit(USART3,USART_IT_RXNE); /USART_RX_BUFi+=USART_ReceiveData(USART3); elseflag3=0; */ void USART3_IRQHandler(void) u8 tmp; if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) tmp=USART_ReceiveData(USA