定時器的入門程序

void TIM1_Configuration (uint Period,uint Pulse)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_OCInitTypeDefTIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);//使能由APB2時鐘控制的外設中的TIM1端口

TIM_DeInit(TIM1); //復位定時器1所有寄存器

TIM_TimeBaseStructure.TIM_Prescaler = 0; //預分頻數為0,不分頻
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//計數方式為順序計數模式，增大型
//TIM_TimeBaseStructure.TIM_Period = 5625-1;//設置計數器溢出后的重載初值
TIM_TimeBaseStructure.TIM_Period = Period-1;//設置計數器溢出后的重載初值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //配置時鐘分隔值
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //循環計數次數值

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //用以上參數初始化定時器時間基礎模塊

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = Pulse;//127;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);


TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
TIM_BDTRInitStructure.TIM_DeadTime = 5;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;

TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

//清中斷
TIM_ClearFlag(TIM1, TIM_FLAG_Update);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);

//TIM1中斷源設置，開啟相應通道的捕捉比較中斷



TIM_Cmd(TIM1, ENABLE); //使能定時器1



TIM_CtrlPWMOutputs(TIM1, ENABLE);//使能定時器1的PWM輸出

}

void TIM2_Configuration (uint Period)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//用以上參數初始化定時器時間基礎模塊

TIM_DeInit(TIM2); //復位定時器1所有寄存器

TIM_TimeBaseStructure.TIM_Prescaler = 0; //預分頻數為0,不分頻
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//計數方式為順序計數模式，增大型
//TIM_TimeBaseStructure.TIM_Period = 5625-1;//設置計數器溢出后的重載初值
TIM_TimeBaseStructure.TIM_Period = Period-1;//設置計數器溢出后的重載初值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //配置時鐘分隔值
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //循環計數次數值

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
//清中斷
TIM_ClearFlag(TIM2, TIM_FLAG_Update);

//TIM1中斷源設置，開啟相應通道的捕捉比較中斷
TIM_ITConfig(//使能或者失能指定的TIM中斷
TIM2, //TIM2
TIM_IT_Update|//TIM 中斷源
TIM_IT_Trigger,//TIM 觸發中斷源
ENABLE//使能
);

TIM_Cmd(TIM2, ENABLE); //使能定時器1

}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

#ifdefVECT_TAB_RAM//中斷向量表存放位置選擇

NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //中斷向量表存放于RAM中0x00
#else

NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);//中斷向量表存放于FLASH中0x00
#endif

//中斷NVIC設置：允許中斷，設置優先級//中斷向量設置
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//設置優先級分組：先占優先級2位,從優先級2位
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//更新事件
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//搶占優先級0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//響應優先級1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//允許中斷
NVIC_Init(&NVIC_InitStructure);//寫入設置

}