轮询方式的usart数据传输

#include "stm32f10x_lib.h"
#include

ErrorStatus HSEStartUpStatus;

void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void);

int main(void)
{
u16 i = 0;

RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
USART_Configuration();
//printf("\r\n welcome to WUHAN R&D Center,Embest \r\n");
// printf("\r\n please input character From Keyboard \r\n");
while(1)
{
if(USART_GetFlagStatus(USART1,USART_IT_RXNE) == SET)
{
i = USART_ReceiveData(USART1);
USART_SendData(USART1,i);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET)
{
}
}
}



}
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);

RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while( RCC_GetSYSCLKSource() != 0x08 )
{
}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA,ENABLE);

}
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VecTab_RAM,0X0);
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0X0);
#endif
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
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);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

USART_ART_BaudRate = 115200;
USART_ART_WordLength = USART_WordLength_8b;
USART_ART_StopBits = USART_StopBits_1;
USART_ART_Parity = USART_Parity_No;
USART_ART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_ART_Mode = USART_Mode_Rx | USART_Mode_Tx;


USART_ART_CPOL = USART_CPOL_Low;
USART_ART_CPHA = USART_CPHA_2Edge;
USART_ART_LastBit = USART_LastBit_Disable;

/*USART_ART_Clock = USART_Clock_Disable;
USART_ART_CPOL = USART_CPOL_Low;
USART_ART_CPHA = USART_CPHA_2Edge;
USART_ART_LastBit = USART_LastBit_Disable; */


USART_Init(USART1,&USART_InitStructure);
USART_ClockInit(USART1,&USART_ClockInitStructure);
USART_C

md(USART1,ENABLE);

}
/*int fputc(int ch ,FILE *f)
{
USART_SendData(USART1,(u8) ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET)
{
}
return ch;
} */