stm32定时器2输出10KHZ波形

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/*! @function
********************************************************************************

º¯ÊýÃû :RCC_Configuration
¹¦ÄÜ :ʱÖÓÅäÖÃ
----------------------------------------------------------------------------------
²ÎÊý :ÎÞ
·µ»ØÖµ :ÎÞ
---------------------------------------------------------------------------------
ʹÓõÄÈ«¾Ö±äÁ¿ºÎÞ
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×÷Õß :
ʱ¼ä : 2012/10/17

*******************************************************************************/
static void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;

RCC_ClocksTypeDef RccClocks;

RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
/* ÑÔñHCLK¨AHBʱÖÓԴΪSYSCLK 1·ÖƵ */
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* ÑÔñPCLK2ʱÖÓԴΪ HCLK¨AHB 1·ÖƵ */
RCC_PCLK2Config(RCC_HCLK_Div1);

/* ÑÔñPCLK1ʱÖÓԴΪ HCLK¨AHB 2·ÖƵ */
RCC_PCLK1Config(RCC_HCLK_Div2);

/* ÉèÖÃFLASHÑÓʱÖÜÆÚÊýΪ2 */
FLASH_SetLatency(FLASH_Latency_2);

/* ʹÄÜFLASHԤȻº´æ */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

/* ÑÔñËøÏà»·¨PLLʱÖÓԴΪHSE 1·ÖƵ¬±¶ÆµÊýΪ9¬ÔòPLLÊä³öƵÂÊΪ 8MHz * 9 = 72MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* ʹÄÜPLL */
RCC_PLLCmd(ENABLE);

/*µÈ´ýPLLÊä³öÎȶ¨ */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
/* ÑÔñSYSCLKʱÖÓԴΪPLL */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

/* µÈ´ýPLL³ÉΪSYSCLKʱÖÓÔ´ */
while(RCC_GetSYSCLKSource() != 0x08);
}

/* ÅäÖÃSysTick */
RCC_GetClocksFreq(&RccClocks);
//SysTick_Config(RccClocks.HCLK_Frequency / OS_TICKS_PER_SEC);

/* ´ò¿ªGPIOʱÖÓ */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD| RCC_APB2Periph_GPIOE,
ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}

/*! @function
********************************************************************************

º¯ÊýÃû :NVIC_Configuration
¹¦ÄÜ :ÖжϿØÖÆÆ÷ÅäÖÃ
----------------------------------------------------------------------------------
²ÎÊý :ÎÞ
·µ»ØÖµ :ÎÞ
---------------------------------------------------------------------------------
ʹÓõÄÈ«¾Ö±äÁ¿ºÎÞ
----------------------------------------------------------------------------------
×÷Õß :
ʱ¼ä : 2012/10/17

*******************************************************************************/
static 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 , 0);
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);