#include"stm32f10x_lib.h"
void RCC_Configuration(void);
void NVIC_Configuration(void);
void Timer_Configuration(void);
void GPIO_Configuration(void);
int main(void)
{
#ifdef debug
debug();
#endif
RCC_Configuration();
NVIC_Configuration();
Timer_Configuration();
GPIO_Configuration();
while(1)
{
}
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON); //设置外部高速晶振（HSE） HSE晶振ON
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE起振
if(HSEStartUpStatus == SUCCESS)// 该函数将等待直到HSE就绪，或者在超时的情况下退出
{ //SUCCESS：HSE晶振稳定且就绪 ERROR：HSE晶振未就绪
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置AHB时钟（HCLK） 系统时钟=AHB时钟
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1); //设置高速AHB时钟（PCLK2） APB1时钟 = HCLK
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2); //设置低速AHB时钟（PCLK1） APB1时钟 = HCLK / 2
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2); //设置代码延时值 2延时周期
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //使能或者失能预取指缓存 预取指缓存使能 ?
/* PLLCLK = 8MHz * 9 = 56 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); //设置PLL时钟源及倍频系数
/* Enable PLL */ //PLL的输入时钟 = HSE时钟频率 PLL输入时钟 x 9
RCC_PLLCmd(ENABLE); //使能或者失能PLL
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) //检查指定的RCC标志位设置与否 PLL就绪
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //设置系统时钟（SYSCLK） RCC_SYSCLKSource: 用作系统时钟的时钟源
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08) //返回用作系统时钟的时钟源 PLL作为系统时钟
{
}
}
/* Enable peripheral clocks --------------------------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //使能GPIOD TIM2
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#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
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel; //TIM2全局中断 通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Timer_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period=2000; //自动重装载寄存器的值 1s
TIM_TimeBaseStructure.TIM_Prescaler= (36000 - 1); //时钟预分频数
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; //时钟分割0x00
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2, TIM_FLAG_Update); //清除溢出中断标志
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);//标志位 当TIM_IT_Update,ENABLE 定时时间到
TIM_Cmd(TIM2, ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11; //推挽输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update)!=RESET)
{
TIM_ClearITPendingBit(TIM2 , TIM_FLAG_Update);
if(ten==0x11)
{
GPIO_Write(GPIOD,0x0f00);
ten=0x22;
}
else if(ten==0x22)
{
GPIO_Write(GPIOD,0x0000);
ten=0x33;
}
else if(ten==0x33)
{
GPIO_SetBits(GPIOD,GPIO_Pin_8|GPIO_Pin_10);
ten=0x44;
}
else if(ten==0x44)
{
GPIO_ResetBits(GPIOD,GPIO_Pin_8|GPIO_Pin_10);
ten=0x55;
}
else if(ten==0x55)
{
GPIO_SetBits(GPIOD,GPIO_Pin_9|GPIO_Pin_11);
ten=0x66;
}
else
{
GPIO_ResetBits(GPIOD,GPIO_Pin_9|GPIO_Pin_11);
ten=0x11;
}
}
}
|
楼主
