单片机技术实战基于stc51和stm32串口源码

1、main 函数的编程/*文件名称：USART 接收实验实验目的：掌握 STM32 USART 的操作与配置方法程序说明：1.通过串口调试工具显示连接 PC 机与串口调试，将波特率设定为 192002.发送字符串asdasdad+x,在 LCD 第 7 行显示 asdasdad,以x位结束标志日期版本：2011-9-19/V1.0a*/* Includes*/#include stm32f10 x.h #include lcd.h#include stdio.h/* Private typedef*/* Private define/* Private macro*/*/* Private va

2、riables*/u32_t TimingDelay = 0;u8_t USART_RXBUF20;extern u8_t RXOVER;/* Private function prototypes*/void NVIC_Configuration(void);void Delay_Ms(u32_ime);void USART_Config(void);void USART_SendString(8_t *str);/* Private functions*/*说明参数返回值*/main(void)u8_t i;主函数NoneNoneSysTick_Config(SystemCoreClock

3、/1000);/1ms 中断一次/LCD 工作模式配置STM3210B_LCD_Init();LCD_Clear(White); LCD_SetTextColor(White); LCD_SetBackColor(Blue);LCD_ClearLine(Line0);LCD_ClearLine(Line1); LCD_ClearLine(Line2);LCD_ClearLine(Line3);LCD_ClearLine(Line4);LCD_DisplayStringLine(Line1,LCD_DisplayStringLine(Line3,USART DEMOReceive & Displ

4、ay););LCD_SetTextColor(Blue);LCD_SetBackColor(White);USART_Config();LCD_DisplayStringLine(Line6,Receive:);USART_SendString(e to HBEUrn);/发送字符串while(1)if(RXOVER = 1)LCD_ClearLine(Line7); LCD_DisplayStringLine(Line7,USART_RXBUF); for(i=0;i20;i+)USART_RXBUFi = ;/清空接收区RXOVER = 0;USART_ITConfig(USART2,US

5、ART_IT_RXNE,ENABLE); /串口 2 接收中断使能，开启接收中断/*说明参数返回值*/USART2 相关GPIO 和工作模式配置NoneNonevoid USART_Config(void)GPIO_InitTypeDefGPIO_InitStructure; USART_InitTypeDef USART_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);/开启时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);NVIC_Confi

6、guration();/配置 USART2 TX 引脚工作模式GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;/复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);/配置 USART2 RX 引脚工作模式GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO

7、_Mode = GPIO_Mode_IN_FLOATING;/浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure);/串口 2 工作模式配置USART_InitStructure.USART_BaudRate = 19200;/可根据题目要求设置波特率USART_InitStructure.USART_WordLength = USART_WordLength_8b;/8 位数据USART_InitStructure.USART_Stits = USART_Stits_1;/停止位 1USART_InitStructure.USART_Parity = USAR

8、T_Parity_No ;/无奇偶校验 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;/无硬件流 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;/既发送又接收 USART_Init(USART2, &USART_InitStructure);USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);/接收中断使能 USART_Cmd(USART2, ENABLE);/串口 2

9、 使能/*说明参数返回值*/USART2 字符串发送函数 str: 指向字符串的指针 Nonevoid USART_SendString(8_t *str)u8_t index = 0;doUSART_SendData(USART2,strindex);/串口 2 发送数据while(USART_GetFlagSus(USART2,USART_FLAG_TXE) = RESET);/等待串口 2 发送完成index+;while(strindex != 0);/检查字符串结束标志/*说明参数返回值*/配置中断向量控制器NoneNonevoid NVIC_Configuration(void)N

10、VIC_InitTypeDef NVIC_InitStructure;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);/中断分组/* Enable the RTCerrupt */NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;/配置串口 2 中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;/抢占优先级 1 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;/响应优先级 0 NV

11、IC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/中断使能NVIC_Init(&NVIC_InitStructure);/*说明参数返回值*/延时函数nTime: 延时时间Nonevoid Delay_Ms(u32_ime)TimingDelay = nTime;while(TimingDelay != 0);/*END OF FILE*/11.4.2 Usart 中断服务程序/全局变量、外部变量定义 extern u32_t TimingDelay;extern u8_t USART_RXBUF20;u8_t RXOVER = 0;u8_t RXCUNT = 0;/中断服务程序void USART2_IRQHandler(void)u8_t temp;if(USART_GetITSus(USART2,USART_IT_RXNE) != RESET) /检查串口 2 是否接收中断temp = USART_ReceiveData(USART