分享几个STM32F103RCT6例程(USART串口实验) -

#include <stm32f10x.h>
#include "usart.h"
//#define CTRT
void Delay (uint32_t nCount);
#define LED1(x) x ? GPIO_SetBits(GPIOB,GPIO_Pin_12): GPIO_ResetBits(GPIOB,GPIO_Pin_12)
#define LED2(x) x ? GPIO_SetBits(GPIOB,GPIO_Pin_13): GPIO_ResetBits(GPIOB,GPIO_Pin_13)
#define LED3(x) x ? GPIO_SetBits(GPIOB,GPIO_Pin_14): GPIO_ResetBits(GPIOB,GPIO_Pin_14)
#define LED4(x) x ? GPIO_SetBits(GPIOB,GPIO_Pin_15): GPIO_ResetBits(GPIOB,GPIO_Pin_15)
uint8_t TxBuffer[] = "\n\rUSART Hyperterminal Hardware Flow Control Example: USART - \
Hyperterminal communication using hardware flow control\n\r";
#ifndef CTRT
//配置矢量中断，矢量的意思就是有顺序，有先后的意思。
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure; //定义数据结构体
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0000);//将中断矢量放到Flash的0地址
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);//设置优先级配置的模式，详情请阅读原材料中的文章
//使能串口中断，并设置优先级
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); //将结构体丢到配置函数，即写入到对应寄存器中
}
#endif
int main(void)
{
u32 i=0xffffff;
SystemInit();
#ifdef CTRT /*使用CTS RTS硬件流模式*/
USART_CTRT_Configuartion();
while(NbrOfDataToTransfer--)
{
USART_SendData(USART1, TxBuffer[TxCounter++]);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
/*Receive a string (Max RxBufferSize bytes) from the Hyperterminal ended by '\r' (Enter key) */
while(1)
{
if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET)
{
USART_SendData(USART1,USART_ReceiveData(USART1));
}
}
#else /*普通串口模式*/
usart_Configuration();
NVIC_Configuration();
while(1)
{
printf("Waveshare!\r\n");
while(--i);
i=0xffffff;
}
#endif
}
/*******************************************************************************
* Function Name : Delay
* Description : Delay Time
* Input : - nCount: Delay Time
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void Delay (uint32_t nCount)
{
for(; nCount != 0; nCount--);
}

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