stm32定時(shí)器2輸出10KHZ波形

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

º¯ÊýÃû :RCC_Configuration
¹¦ÄÜ :ʱÖÓÅäÖÃ
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²ÎÊý :ÎÞ
·µ»ØÖµ :ÎÞ
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×÷Õß :
ʱ¼ä : 2012/10/17

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

/* Enable the USART2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

/* Enable the USART3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the TIMER3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the TIMER3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

//72M timer2
//ÖжÏʱ¼äº¨720*10/72000000=0.1Ms=10K
void Timer2_config() //ucosiiʱÖÓ
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_TimeBaseStructure.TIM_Prescaler = 360-1; //36M/360=100K HZ
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòÉϼÆÊý
TIM_TimeBaseStructure.TIM_Period = 10; // ; //×°ÔØÖµÑÔñ 10K
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
//TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_Trigger,ENABLE);
TIM_Cmd(TIM2, ENABLE);
}

void TIM2_IRQHandler(void)
{

if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //¼ì²éÖ¸¶¨µÄTIMÖжϷÉúÓë·ñ:TIM ÖжÏÔ´
{

if(Ledflg==0)
{
GPIO_SetBits(GPIOC, GPIO_Pin_6);
GPIO_SetBits(GPIOC, GPIO_Pin_7);
Ledflg=1;
}
else
{
GPIO_ResetBits(GPIOC, GPIO_Pin_6);
GPIO_ResetBits(GPIOC, GPIO_Pin_7);
Ledflg=0;
}
Ledcnt=0;

}
TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //Çå³ýTIMxµÄÖжϴý´¦Àíλ:TIM ÖжÏÔ´

}