STM32 库函数编写程序

#include "stm32f10x.h"

void RCC_Configuration(void);//首先设置系统时钟为8MHZ
void GPIO_Configuration(void);
void USART_Configuration(void);

void delay1ms(u16 t){
u16 i,j;
for(i=0;i<t;i++)
for(j=1000;j>0;j++);
}

int main(void){

u8 i,data='A';
RCC_Configuration();
GPIO_Configuration();
USART_Configuration();
for(i=0;i<30;i++){
USART_SendData(USART1, data);  //发送数据
data++;
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE)==RESET);//USART_SR的TC置一，表示发送数据完成；否则没有完成；

}
return 0;
}

void RCC_Configuration(void)//系统时钟设置，应用库函数编程过程
{
//----------使用外部RC晶振-----------
RCC_DeInit();			//初始化为缺省值
RCC_HSEConfig(RCC_HSE_ON);	//使能外部的高速时钟
while(RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET);	//等待外部高速时钟使能就绪

RCC_HCLKConfig(RCC_SYSCLK_Div1);		//HCLK = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1);			//PCLK2 =  HCLK
RCC_PCLK1Config(RCC_HCLK_Div2);			//PCLK1 = HCLK/2
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);	//PLLCLK = 8MHZ * 9 =72MHZ，系统给外设的时钟fpclkx
RCC_PLLCmd(ENABLE);			//Enable PLLCLK

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);	//Wait till PLLCLK is ready
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);	//Select PLL as system clock
while(RCC_GetSYSCLKSource()!=0x08);		//Wait till PLL is used as system clock source

//---------打开相应外设时钟--------------------
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);	//使能APB2外设的GPIOA的时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);	//使能APB2外设的GPIOC的时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

}

void GPIO_Configuration(void)//复用引脚设置
{
GPIO_InitTypeDef GPIO_InitStructure;

/* Configure USARTx_Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//复用上拉
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* Configure USARTx_Rx as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//浮空输入
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

}
void USART_Configuration(void)//复用引脚设置

{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;  //8位数据
USART_InitStructure.USART_StopBits = USART_StopBits_1;       //停止位1位
USART_InitStructure.USART_Parity = USART_Parity_No;          //不需要奇偶校验
USART_InitStructure.USART_HardwareFlowControl =	USART_HardwareFlowControl_None;//不需要硬件流控制
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;//发送使能，接收使能
USART_Init(USART1, &USART_InitStructure);//初始化
USART_Cmd(USART1, ENABLE);  //UE使能

}