STM32F定时器的功能非常丰富，像我这样单纯的TIM2定时器溢出中断人恐怕不多了，所以找例子资料也找不到费了九牛二虎之力终于杜撰出来了，发帖庆祝！我这里用了ST新版的STM32F FWLIB2.0库，用到的函数都添加了中文注释。
IAR编译的项目传不上来，有要看的朋友留下EMAIL我发邮件给你。
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
ErrorStatus HSEStartUpStatus;
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void TIM_Configuration(void);
void delay(void);
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();/*[初始化外围设备指针]*/
#endif
GPIO_Configuration();//初始化io口
NVIC_Configuration();//初始化中断嵌套
RCC_Configuration(); //初始化时钟与复位
TIM_Configuration();//初始化定时器
while(1)
{
delay();
}
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose)[复位RCC外围设备寄存器到默认复位值] */
RCC_DeInit();
/* Enable HSE [HSE振荡器开启]*/
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready [等待HSE启动]*/
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer [预取缓冲区允许]*/
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state[代码2个延时周期] */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK [AHB时钟等于SYSCLK]*/
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK [APB2时钟等于HCLK]*/
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 [低速APB1时钟等于HCLK/2]*/
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz [配置PLL时钟源和乘法因子][PLL时钟输入等于HSE时钟][PLL乘法因子取值9]*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL [允许PLL]*/
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready [等待PLL时钟就绪]*/
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source [选择PLL作为系统时钟]*/
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is u
sed as system clock source[等待PLL被作为系统时钟] */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* TIM2 clock enable [TIM2定时器允许]*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : LED输出配置
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOC clock [使能GPIOC时钟]*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PC.04, PC.05, PC.06 and PC.07 as output push-pull[把PC4、PC5、PC6、PC7配置成输出模式] */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//GPIO最高速度50MHz
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures the nested vectored interrupt controller.[配置中断向量表的起始位置]
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 [设置中断向量表的起始位置0x20000000]*/
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000[设置中断向量表的起始位置0x0x08000000] */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure the NVIC Preemption Priority Bits[配置优先级组] */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/* Enable the TIM2 gloabal Interrupt [允许TIM2全局中断]*/
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*******************************************************************************
* Function Name : TIM2_Configuration
* Description :
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// TIM_OCInitTypeDef TIM_OCInitStructure ;
TIM_DeInit( TIM2);//复位TIM2定时器
/* TIM2 configuration */
TIM_TimeBaseStructure.TIM_Period = 0xffff; //最大
计数值0xffff
TIM_TimeBaseStructure.TIM_Prescaler = 0x36;//分频0x36
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; // 时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数方向向上计数
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* Clear TIM2 update pending flag[清除TIM2溢出中断标志] */
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
/* Enable TIM2 Update interrupt [TIM2溢出中断允许]*/
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
/* TIM2 enable counter [允许tim2计数]*/
TIM_Cmd(TIM2, ENABLE);
}
/*******************************************************************************
* Function Name : delay
* Description : 延时
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void delay(void)
{
u32 i,j;
for (i=0; i<0x0fffff; i++)
{
j ++;
}
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed[断言失败]
* Description : Reports the name of the source file and the source line number
* where the assert error has occurred.
* Input : - file: pointer to the source file name
* - line: assert error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/