Stm32串口发送字符串数据

/**说明：*PA0:KEY1;PA1:KEY2;*PA2:LED1;PA3:LED2;*PA9:USART1_TX;PA10:USART1_RX*/#include "stm32f10x.h"  #include "stm32f10x_rcc.h"  #include "stm32f10x_gpio.h"  #include "stm32f10x_usart.h" #include "stm32f10x_crc.h"#include "system_stm32f10x.h" #include "stdio.h" #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)void RCC_Configuration(void);  void GPIO_Configuration(void); void USART_Configuration(void); void delay_ms(u16 time);void UART_PutChar(USART_TypeDef* USARTx, uint8_t Data);void UART_PutStr (USART_TypeDef* USARTx, uint8_t *str);int main(){SystemInit();RCC_Configuration();  GPIO_Configuration();   USART_Configuration(); while(1){printf("\n发送的信息：");UART_PutStr(USART1, "hello world!"); delay_ms(1000);  } }void RCC_Configuration(void)    {     RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);     }   void GPIO_Configuration(void)    {    GPIO_InitTypeDef GPIO_InitStructure;    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;             //管脚9  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       //复用推挽输出  GPIO_Init(GPIOA, &GPIO_InitStructure);                //TX初始化  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;            //管脚10  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;         //上拉输入  GPIO_Init(GPIOA, &GPIO_InitStructure);                //RX初始化  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3;//LED GPIO_Pin_All    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  GPIO_Init(GPIOA, &GPIO_InitStructure);   }void USART_Configuration(void)//串口初始化函数  {  //串口参数初始化    USART_InitTypeDef USART_InitStructure;               //串口设置恢复默认参数  //初始化参数设置  USART_InitStructure.USART_BaudRate = 9600;                  //波特率9600  USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长8位  USART_InitStructure.USART_StopBits = USART_StopBits_1;      //1位停止字节  USART_InitStructure.USART_Parity = USART_Parity_No;         //无奇偶校验  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无流控制  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//打开Rx接收和Tx发送功能  USART_Init(USART1,&USART_InitStructure);                   //初始化  USART_Cmd(USART1,ENABLE);                                  //启动串口  }void delay_ms(u16 time)     {    u16 i=0;    while(time--)     {    i=12000;    while(i--);    }    } int putchar(int c)                                            //putchar函数  {  if (c == \n){putchar(\r);}                                 //将printf的\n变成\r  USART_SendData(USART1, c);                                   //发送字符  while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){} //等待发送结束  return c;                                                      //返回值  } void UART_PutChar(USART_TypeDef* USARTx, uint8_t Data){USART_SendData(USARTx, Data);while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET){}}void UART_PutStr (USART_TypeDef* USARTx, uint8_t *str)  {  while (0 != *str)  {  UART_PutChar(USARTx, *str);  str++;  }  }