界说：
TXD1—– PA9-US1-TX
RXD1—– PA10-US1-RX
速率：115200,n,8,1
/* 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：在指定座标规模显现一副图片* 进口参数：StartX 行开始座标* StartY 列开始座标* Dir 图画显现方向 * pic 图片头指针* 出口参数：无* 说 明：图片取模格局为水平扫描，16位色彩形式 取模软件img2LCD* 调用办法：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; //中止位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; //收发形式/* Configure USART1 */USART_Init(USARTx, &USART_InitStructure); //装备串口参数函数/* Enable USART1 Receive and Transmit interrupts */USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能接纳中止USART_ITConfig(USART1, USART_IT_TXE, ENABLE); //使能发送缓冲空中止 /* Enable the USART1 */USART_Cmd(USART1, ENABLE); }/* 名 称：int main(void)* 功 能：主函数* 进口参数：无* 出口参数：无* 说 明：* 调用办法：无 /int main(void){uint8_t a=0;/* System Clocks Configuration */RCC_Configuration(); //体系时钟设置/*嵌套向量中止操控器 说明晰USART1抢占优先级等级0（最多1位） ，和子优先级等级0（最多7位） */ NVIC_Configuration(); //中止源装备/*对操控LED指示灯的IO口进行了初始化，将端口装备为推挽上拉输出，口线速度为50Mhz。PA9,PA10端口复用为串口1的TX，RX。在装备某个口线时，首要应对它地点的端口的时钟进行使能。不然无法装备成功，因为用到了端口B， 因而要对这个端口的时钟进行使能，一起因为用到复用IO口功用用于装备串口。因而还要使能AFIO（复用功用IO）时钟。*/GPIO_Configuration(); //端口初始化USART_Config(USART1); //串口1初始化USART_OUT(USART1,"测验串口 *\r\n"); //向串口1发送开机字符。USART_OUT(USART1,"*\r\n"); USART_OUT(USART1,"\r\n"); USART_OUT(USART1,"\r\n"); while (1){if(rec_f==1){ //判别是否收到一帧有用数据rec_f=0;USART_OUT(USART1,"\r\n您发送的信息为: \r\n"); USART_OUT(USART1,&TxBuffer1[0]);if(a==0) {GPIO_SetBits(GPIOB, GPIO_Pin_5); a=1;} //LED1 V6（V3板） V2（MINI板） 明暗闪耀 else {GPIO_ResetBits(GPIOB, GPIO_Pin_5);a=0; }}}}/* 名 称：void Delay(__IO uint32_t nCount)* 功 能：延时函数* 进口参数：无* 出口参数：无* 说 明：* 调用办法：无 /void Delay(__IO uint32_t nCount){for(; nCount != 0; nCount--);}/* 名 称：void USART_OUT(USART_TypeDef* USARTx, uint8_t *Data,...)* 功 能：格局化串口输出函数* 进口参数：USARTx: 指定串口Data： 发送数组...: 不定参数* 出口参数：无* 说 明：格局化串口输出函数"\r" 回车符 USART_OUT(USART1, "abcdefg\r") "\n" 换行符 USART_OUT(USART1, "abcdefg\r\n")"%s" 字符串 USART_OUT(USART1, "字符串是：%s","abcdefg")"%d" 十进制 USART_OUT(USART1, "a=%d",10)* 调用办法：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){ //判别是否抵达字符串完毕符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 标明是10进制 非十进制，转化成果为0; 例：d=-379;履行 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：体系时钟装备为72MHZ， 外设时钟装备* 进口参数：无* 出口参数：无* 说 明：* 调用办法：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口装备* 进口参数：无* 出口参数：无* 说 明：* 调用办法：/ void GPIO_Configuration(void){GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //LED1操控--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：中止源装备* 进口参数：无* 出口参数：无* 说 明：* 调用办法：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 说明晰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中止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 中止服务程序{unsigned int i;if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //判别读寄存器是否非空{ RxBuffer1[RxCounter1++] = USART_ReceiveData(USART1); //将读寄存器的数据缓存到接纳缓冲区里if(RxBuffer1[RxCounter1-2]==0x0d&&RxBuffer1[RxCounter1-1]==0x0a) //判别完毕标志是否是0x0d 0x0a{for(i=0; i< RxCounter1; i++) TxBuffer1[i] = RxBuffer1[i]; //将接纳缓冲器的数据转到发送缓冲区，预备转发rec_f=1; //接纳成功标志TxBuffer1[RxCounter1]=0; //发送缓冲区完毕符 RxCounter1=0;}}if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET) //这段是为了防止STM32 USART 第一个字节发不出去的BUG { USART_ITConfig(USART1, USART_IT_TXE, DISABLE); //制止发缓冲器空中止， } }
