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STM32串口库函数版例程

作者: 时间:2016-11-09 来源:网络 收藏
定义:
TXD1----- PA9-US1-TX
RXD1----- PA10-US1-RX

速率:115200,n,8,1

本文引用地址://m.amcfsurvey.com/article/201611/318038.htm

/* Includes ------------------------------------------------------------------*/#include "stm32f10x.h"#include "platform_config.h"#include "stm32f10x_usart.h"#include "misc.h"#include "stdarg.h"/* Private variables ---------------------------------------------------------*/USART_InitTypeDef USART_InitStructure;uint8_t TxBuffer1[] = "USART Interrupt Example: This is USART1 DEMO"; uint8_t RxBuffer1[],rec_f,tx_flag;__IO uint8_t TxCounter1 = 0x00;__IO uint8_t RxCounter1 = 0x00; uint32_t Rec_Len;/* Private function prototypes -----------------------------------------------*/void RCC_Configuration(void);void GPIO_Configuration(void);void NVIC_Configuration(void);void Delay(__IO uint32_t nCount);void USART_OUT(USART_TypeDef* USARTx, uint8_t *Data,...);char *itoa(int value, char *string, int radix);void USART_Config(USART_TypeDef* USARTx);GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStruct;USART_ClockInitTypeDef USART_ClockInitStruct;/* 名 称:void ili9325_DrawPicture(u16 StartX,u16 StartY, u8 Dir,u8 *pic)* 功 能:在指定座标范围显示一副图片* 入口参数:StartX 行起始座标* StartY 列起始座标* Dir 图像显示方向 * pic 图片头指针* 出口参数:无* 说 明:图片取模格式为水平扫描,16位颜色模式 取模软件img2LCD* 调用方法:ili9325_DrawPicture(0,0,0,(u16*)demo);/void USART_Config(USART_TypeDef* USARTx){USART_InitStructure.USART_BaudRate = 115200; //速率115200bpsUSART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位USART_InitStructure.USART_Parity = USART_Parity_No; //无校验位USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件流控USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式/* Configure USART1 */USART_Init(USARTx, &USART_InitStructure); //配置串口参数函数/* Enable USART1 Receive and Transmitinterrupts */USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能接收中断USART_ITConfig(USART1, USART_IT_TXE, ENABLE); //使能发送缓冲空中断 /* Enable the USART1 */USART_Cmd(USART1, ENABLE); }/* 名 称:int main(void)* 功 能:主函数* 入口参数:无* 出口参数:无* 说 明:* 调用方法:无 /int main(void){uint8_t a=0;/* System Clocks Configuration */RCC_Configuration(); //系统时钟设置/*嵌套向量中断控制器 说明了USART1抢占优先级级别0(最多1位) ,和子优先级级别0(最多7位) */ NVIC_Configuration(); //中断源配置/*对控制LED指示灯的IO口进行了初始化,将端口配置为推挽上拉输出,口线速度为50Mhz。PA9,PA10端口复用为串口1的TX,RX。在配置某个口线时,首先应对它所在的端口的时钟进行使能。否则无法配置成功,由于用到了端口B, 因此要对这个端口的时钟进行使能,同时由于用到复用IO口功能用于配置串口。因此还要使能AFIO(复用功能IO)时钟。*/GPIO_Configuration(); //端口初始化USART_Config(USART1); //串口1初始化USART_OUT(USART1,"测试串口 *rn"); //向串口1发送开机字符。USART_OUT(USART1,"*rn"); USART_OUT(USART1,"rn"); USART_OUT(USART1,"rn"); while (1){if(rec_f==1){ //判断是否收到一帧有效数据rec_f=0;USART_OUT(USART1,"rn您发送的信息为: rn"); USART_OUT(USART1,&TxBuffer1[0]);if(a==0) {GPIO_SetBits(GPIOB, GPIO_Pin_5); a=1;} //LED1 V6(V3板) V2(MINI板) 明暗闪烁 else {GPIO_ResetBits(GPIOB, GPIO_Pin_5);a=0; }}}}/* 名 称:void Delay(__IO uint32_t nCount)* 功 能:延时函数* 入口参数:无* 出口参数:无* 说 明:* 调用方法:无 /void Delay(__IO uint32_t nCount){for(; nCount != 0; nCount--);}/* 名 称:void USART_OUT(USART_TypeDef* USARTx, uint8_t *Data,...)* 功 能:格式化串口输出函数* 入口参数:USARTx: 指定串口Data: 发送数组...: 不定参数* 出口参数:无* 说 明:格式化串口输出函数"r" 回车符 USART_OUT(USART1, "abcdefgr") "n" 换行符 USART_OUT(USART1, "abcdefgrn")"%s" 字符串 USART_OUT(USART1, "字符串是:%s","abcdefg")"%d" 十进制 USART_OUT(USART1, "a=%d",10)* 调用方法:无 /void USART_OUT(USART_TypeDef* USARTx, uint8_t *Data,...){ const char *s;int d;char buf[16];va_list ap;va_start(ap, Data);while(*Data!=0){ //判断是否到达字符串结束符if(*Data==0x5c){ //switch (*++Data){case r: //回车符USART_SendData(USARTx, 0x0d); Data++;break;case n: //换行符USART_SendData(USARTx, 0x0a); Data++;break;default:Data++;break;}}else if(*Data==%){ //switch (*++Data){ case s: //字符串s = va_arg(ap, const char *);for ( ; *s; s++) {USART_SendData(USARTx,*s);while(USART_GetFlagStatus(USARTx, USART_FLAG_TC)==RESET);}Data++;break;case d: //十进制d = va_arg(ap, int);itoa(d, buf, 10);for (s = buf; *s; s++) {USART_SendData(USARTx,*s);while(USART_GetFlagStatus(USARTx, USART_FLAG_TC)==RESET);}Data++;break;default:Data++;break;} }else USART_SendData(USARTx, *Data++);while(USART_GetFlagStatus(USARTx, USART_FLAG_TC)==RESET);}}/整形数据转字符串函数char *itoa(int value, char *string, int radix)radix=10 标示是10进制 非十进制,转换结果为0; 例:d=-379;执行 itoa(d, buf, 10); 后buf="-379" /char *itoa(int value, char *string, int radix){int i, d;int flag = 0;char *ptr = string;/* This implementation only works for decimal numbers. */if (radix != 10){*ptr = 0;return string;}if (!value){*ptr++ = 0x30;*ptr = 0;return string;}/* if this is a negative value insert the minus sign. */if (value < 0){*ptr++ = -;/* Make the value positive. */value *= -1;}for (i = 10000; i > 0; i /= 10){d = value / i;if (d || flag){*ptr++ = (char)(d + 0x30);value -= (d * i);flag = 1;}}/* Null terminate the string. */*ptr = 0;return string;} /* NCL_Itoa *//* 名 称:void RCC_Configuration(void)* 功 能:系统时钟配置为72MHZ, 外设时钟配置* 入口参数:无* 出口参数:无* 说 明:* 调用方法:无 / void RCC_Configuration(void){SystemInit(); RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1 |RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO , ENABLE); }/* 名 称:void GPIO_Configuration(void)* 功 能:通用IO口配置* 入口参数:无* 出口参数:无* 说 明:* 调用方法:/ void GPIO_Configuration(void){GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //LED1控制--PB5GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 TXGPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART1 RXGPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用开漏输入GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口 }/* 名 称:void NVIC_Configuration(void)* 功 能:中断源配置* 入口参数:无* 出口参数:无* 说 明:* 调用方法:无 /void NVIC_Configuration(void){/* 结构声明*/NVIC_InitTypeDef NVIC_InitStructure;/* Configure the NVIC Preemption Priority Bits */ /* Configure one bit for preemption priority *//* 优先级组 说明了抢占优先级所用的位数,和子优先级所用的位数 在这里是1, 7 */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //设置串口1中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级 0NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能NVIC_Init(&NVIC_InitStructure);}
///*STM32F10x Peripherals Interrupt Handlers *////* @brief This function handles USART1 global interrupt request.* @param None* @retval : None*/void USART1_IRQHandler(void) //串口1 中断服务程序{unsigned int i;if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //判断读寄存器是否非空{ RxBuffer1[RxCounter1++] = USART_ReceiveData(USART1); //将读寄存器的数据缓存到接收缓冲区里if(RxBuffer1[RxCounter1-2]==0x0d&&RxBuffer1[RxCounter1-1]==0x0a) //判断结束标志是否是0x0d 0x0a{for(i=0; i< RxCounter1; i++) TxBuffer1[i] = RxBuffer1[i]; //将接收缓冲器的数据转到发送缓冲区,准备转发rec_f=1; //接收成功标志TxBuffer1[RxCounter1]=0; //发送缓冲区结束符 RxCounter1=0;}}if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET) //这段是为了避免STM32 USART 第一个字节发不出去的BUG { USART_ITConfig(USART1, USART_IT_TXE, DISABLE); //禁止发缓冲器空中断, } }


关键词:STM32串口库函

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