TIM的一些配置参数
1、使能TIM时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM*,ENABLE);
2、基础设置
TIM_TimeBaseStructure.TIM_Period 计数值
TIM_TimeBaseStructure.TIM_Prescaler 预分频,此值+1为分频的除数
TIM_TimeBaseStructure.TIM_ClockDivision = 0 时钟因子 待做进一步说明
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0 待做进一步说明
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up 向上计数
TIM_CounterMode_Dowm 向下计数
TIM_CounterMode_CenterAligned1 中心对齐方式1
TIM_CounterMode_CenterAligned2 中心对齐方式2
TIM_CounterMode_CenterAligned3 中心对齐方式3
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
3、通道设置
----------------------------------------------------------------------------------------------
输出比较 & PWM通道
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing 输出比较时间模式 (输出引脚冻结无效)
TIM_OCMode_Active 输出比较主动模式 (匹配时设置输出引脚为有效电平，当计数值为比较/捕获寄存器值相同时，强制输出为高电平)
TIM_OCMode_Inactive; 输出比较非主动模式 (匹配时设置输出引脚为无效电平，当计数值为比较/捕获寄存器值相同时，强制输出为低电平)
TIM_OCMode_Toggle 输出比较触发模式 (翻转。当计数值与比较/捕获寄存器值相同时，翻转输出引脚的电平)
TIM_OCMode_PWM1 向上计数时，当TIMx_CNT < TIMx_CCR*时，输出电平有效，否则为无效
向下计数时，当TIMx_CNT > TIMx_CCR*时，输出电平无效，否则为有效
TIM_OCMode_PWM2 与PWM1模式相反
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable 禁止OC*输出
TIM_OutputState_Enable 开启OC*输出到对应引脚
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable 互补输出使能。关闭OC*N输出
TIM_OutputNState_Enable 互补输出使能。开启OC*N输出到对应的引脚
TIM_OCInitStructure.TIM_Pulse 比较/PWM 通道的值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; 极性为正
TIM_OCPolarity_Low 极必为负
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 极性为正
TIM_OCNPolarity_Low 极必为负
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set 当MOE=0时，如果实现了OC*N，则死区后OC*=1
TIM_OCIdleState_Reset 当MOE=0时，如果实现了OC*N，则死区后OC*=0
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleNState_Set 当MOE=0时，死区后OC*N=1
TIM_OCIdleNState_Reset 当MOE=0时，死区后OC*N=0
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable); 禁止OC1重装载,即TIM*_CCR*的数一经写入立即生效，否则要在下一个更新事件到来后才被装入寄存器
TIM_CtrlPWMOutputs(TIM1,ENABLE); 如果使用PWM模式，则此句一定不能省
----------------------------------------------------------------------------------------------
输入捕获通道
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1
TIM_Channel_2
TIM_Channel_3
TIM_Channel_4
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising 输入/捕获上升沿有效
TIM_ICPolarity_Falling 输入/捕获下降沿有效
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI IC*输入引脚选择，针对IC1/IC2有不同的定义
TIM_ICSelection_IndirectTI
TIM_ICSelection_TRC
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1 输入模式下，捕获端口上的每一次边沿都触发一次捕获
TIM_ICPSC_DIV2 输入模式下，每2次事件触发一次捕获
TIM_ICPSC_DIV4 输入模式下，每4次事件触发一次捕获
TIM_ICPSC_DIV8 输入模式下，每8次事件触发一次捕获
TIM_ICInitStructure.TIM_ICFilter = 捕获采样频率，详见TIM*_CCMR->IC*F说明
----------------------------------------------------------------------------------------------
死区设置
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable
TIM_OSSRState_Disable
TIM_BDTRInitStructure.TIM_OSSRIState = TIM_OSSRIState_Enable
TIM_OSSRIState_Disable
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF
TIM_LOCKLevel_1
TIM_LOCKLevel_2
TIM_LOCKLevel_3
TIM_BDTRInitStructure.TIM_DeadTime = 这里调整死区大小0-0xff
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable
TIM_Break_Disable
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low
TIM_BreakPolarity_High
TIM_BDTRInitStructure.TIM_AutomaticOutput= TIM_AutomaticOutput_Enable
TIM_AutomaticOutPut_Disable
4、配置中断
5、开启TIM
----------------------------------------------------------------------------------------------------
例：
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
u16 CCR1_Val = 60000;
u16 CCR2_Val = 40000;
u16 CCR3_Val = 20000;
u16 CCR4_Val = 10000;
/* TIM2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* 基础设置*/
TIM_TimeBaseStructure.TIM_Period = 65535; //计数值
TIM_TimeBaseStructure.TIM_Prescaler = 7200-1; //预分频,此值+1为分频的除数
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* 比较通道1*/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive; //输出比较非主动模式
TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //极性为正
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable); //禁止OC1重装载,其实可以省掉这句,因为默认是4路都不重装的.
/*比较通道2 */
TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);
/* 比较通道3 */
TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);
/* 比较通道4 */
TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
TIM_OC4Init(TIM2, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);
/*使能预装载*/
TIM_ARRPreloadConfig(TIM2, ENABLE);
/*预先清除所有中断位*/
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4|TIM_IT_Update);
/* 4个通道和溢出都配置中断*/
TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4|TIM_IT_Update, ENABLE);
/* 允许TIM2开始计数 */
TIM_Cmd(TIM2, ENABLE);