(基于奋斗stm32_v5开发板)
1、创建工程并编写C程序
#include"stm32f10x.h" #include"stdarg.h" void USART1_Config() { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; /* 使能USART1的时钟 */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA , ENABLE); /*配置USART1 TX,并设置为复用推挽输出模式*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /*配置USART1 RX,并设置为浮空输入模式*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /*配置USART1模式*/ USART_InitStructure.USART_BaudRate = 57600; //波特率设置为57600// USART_InitStructure.USART_WordLength = USART_WordLength_8b; //配置串口传输的字长8位// USART_InitStructure.USART_StopBits = USART_StopBits_1; //配置停止位为1// USART_InitStructure.USART_Parity = USART_Parity_No; //不设置奇偶校验位// USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //不采用硬件流// USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //配置串口为双线全双工通信,将RX、Tx模式都开启// USART_Init(USART1, &USART_InitStructure); //向寄存器写入配置参数// USART_Cmd(USART1, ENABLE); //使能USART1外设// } static char *itoa(int value, char *string, int radix) { int i, d; int flag = 0; char *ptr = string; /*此实现只适用于十进制数*/ if(radix != 10) { *ptr = 0; return string; } if(!value) { *ptr++ = 0x30; *ptr = 0; return string; } /*如果这是负值,则插入减号*/ if(value < 0) { *ptr++ = '-'; 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终止字符串*/ *ptr = 0; return string; } void USART1_printf(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 ); } } int main(void) { /*初始化串口*/ USART1_Config(); USART1_printf(USART1,"\r\nHello Word\r\n"); while(1); }
2、连接J-Link,编译,将程序下载进stm32开发板
3、连接串口,打开串口调试助手进行调试
看到打印Hello World,目标完成