#include "stm32f10x.h"
#include "stdio.h"
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void);
int main(void)
{
unsigned char Buffer[]="work hard";
u16 i;
//SystemInit();
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
USART_Configuration();
printf("\r\n this is a printf demo \r\n");
for(i=0;Buffer!='\0';i++)
{
USART_SendData(USART1,Buffer);
while(USART_GetFlagStatus(USART1, USART_FLAG_TC)==RESET);
}
while(1)
{
}
}
/*******************************************************************************
* Function Name : Delay
* Description : Inserts a delay time.
* Input : nCount: specifies the delay time length.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)//自己定义的函数
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_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_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
}
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;//或者设为2位,参看手册
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl =USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
// USART_InitStructure.USART_Clock = USART_Clock_Disable;
// USART_InitStructure.USART_CPOL = USART_CPOL_High;
// USART_InitStructure.USART_CPHA = USART_CPHA_1Edge;
// USART_InitStructure.USART_LastBit = USART_LastBit_Enable;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);//很容易丢失 勿忘
}
int fputc(int ch, FILE *f)
{
/* Write a character to the USART */
USART_SendData(USART1,(u8)ch);
/* Loop until the end of transmission */
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{
}
return ch;
}
用的是3.5的库,感觉程序应该没问题,但是超级终端上显示不了,已经尝试勾选Use MicroLib,依然不行。知道的给指点下吧,纠结好几天了都。 |