本帖最后由 gaochy1126 于 2012-5-6 19:35 编辑
#include "stm32f10x.h"
#include "stm32_eval.h"
#include "stm32f10x_conf.h"
GPIO_InitTypeDef GPIO_InitStructure;//GPIO结构体
void RCC_Configuration(void)//RCC初始化
{
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)
{
}
}
}
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 my_GPIO_Init(void)初始化GPIO
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5 ;
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
//GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void delay()
{
unsigned int x,y;
for(x=0;x<1000;x++)
for(y=0;y<1000;y++);
}
void main(void)
{
char i;
RCC_Configuration();
NVIC_Configuration();
my_GPIO_Init();
GPIO_SetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);
delay();
GPIO_ResetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);
delay();
while(1)
{
for(i=0;i<3;i++)
{
GPIO_ResetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);LED灯全灭
GPIO_WriteBit(GPIOC,0x01<<(i+3),Bit_SET);
点亮一个led左移一个
delay();
}
}
} |
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