STM32一个定时器最多可以定几个不同的时间？TIME4用比较模块，始终调不出几个不同的时间。

motoedy

STM32一个定时器最多可以定几个不同的时间？
想用TIME4定四个不同的时间

[mw_shl_code=c,true]void TIM4_Configuration(void) { /* ------------------------- System Clocks Configuration ------------------------------*/ /* TIM4 clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); /* --------------------------------------------------------------- TIM4 Configuration: The objective is to get TIM4 counter clock at 1 KHz: - Prescaler = (TIM4CLK / TIM4 counter clock) - 1 And generate 4 signals with 4 different delays: TIM4_CH1 delay = CCR1_Val/TIM4 counter clock = 1000 ms TIM4_CH2 delay = CCR2_Val/TIM4 counter clock = 500 ms TIM4_CH3 delay = CCR3_Val/TIM4 counter clock = 250 ms TIM4_CH4 delay = CCR4_Val/TIM4 counter clock = 125 ms --------------------------------------------------------------- */ PrescalerValue = (uint16_t) (SystemCoreClock / 10000) - 1; /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 0xFFFF; //10000-1;// TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;//7200-1;// TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); // TIM_PrescalerConfig(TIM4, 35999, TIM_PSCReloadMode_Immediate); /* Output Compare Timing Mode configuration: Channel1 */ // TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;//TIM_OCMode_Inactive;// TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //极性为正 TIM_OCInitStructure.TIM_Pulse = CCR1_Val; TIM_OC1Init(TIM4, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Disable); TIM_ARRPreloadConfig(TIM4, DISABLE); /* Output Compare Timing Mode configuration: Channel2 */ TIM_OCInitStructure.TIM_Pulse = CCR2_Val; TIM_OC2Init(TIM4, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Disable); /* Output Compare Timing Mode configuration: Channel3 */ TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC3Init(TIM4, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Disable); /* Output Compare Timing Mode configuration: Channel4 */ TIM_OCInitStructure.TIM_Pulse = CCR4_Val; TIM_OC4Init(TIM4, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Disable); // /*预先清除所有中断位*/ TIM_ClearITPendingBit(TIM4, 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(TIM4, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);//|TIM_IT_Update, ENABLE); // TIM_ARRPreloadConfig(TIM4, ENABLE); // /* ------------------------- NVIC Configuration ------------------------------ */ NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* TIM enable counter */ TIM_Cmd(TIM4, ENABLE); }[/mw_shl_code]

[mw_shl_code=c,true]void TIM4_IRQHandler(void) { u16 capture=0; if (TIM_GetITStatus(TIM4, TIM_IT_CC1) != RESET) { TIM_ClearITPendingBit(TIM4, TIM_IT_CC1); capture = TIM_GetCapture1(TIM4); TIM_SetCompare1(TIM4, capture + CCR1_Val); Dis_Time++; } if (TIM_GetITStatus(TIM4, TIM_IT_CC2) != RESET) { TIM_ClearITPendingBit(TIM4, TIM_IT_CC2); capture = TIM_GetCapture1(TIM4); TIM_SetCompare1(TIM4, capture + CCR2_Val); Dis_Time1++; //可添加功能块...... } if (TIM_GetITStatus(TIM4, TIM_IT_CC3) != RESET) { TIM_ClearITPendingBit(TIM4, TIM_IT_CC3); //可添加功能块...... } if (TIM_GetITStatus(TIM4, TIM_IT_CC4) != RESET) { TIM_ClearITPendingBit(TIM4, TIM_IT_CC4); } // else if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET) // { // TIM_ClearITPendingBit(TIM4, TIM_IT_Update); // // } } [/mw_shl_code]

程序如上，CC1的时间应该是CC2的两倍，但是
TIME4用比较模块，始终调不出几个不同的时间。
原子和各位看看，哪错了 ？

正点原子

你这是输出比较模式
怎么用于定时来了??

你要定时，完全没必要这么搞啊。
直接定时器中断，比如1ms中断一次，那么你做个变量，就可以得到最小精度是1ms的任意定时时间....

motoedy

搞定了 

[mw_shl_code=c,true]if (TIM_GetITStatus(TIM4, TIM_IT_CC2) != RESET) { TIM_ClearITPendingBit(TIM4, TIM_IT_CC2); capture = TIM_GetCapture1(TIM4); TIM_SetCompare1(TIM4, capture + CCR2_Val); Dis_Time1++; //可添加功能块...... }[/mw_shl_code]

[mw_shl_code=c,true]capture = TIM_GetCapture1(TIM4); TIM_SetCompare1(TIM4, capture + CCR2_Val); 这里应改为 capture = TIM_GetCapture2(TIM4); TIM_SetCompare2(TIM4, capture + CCR2_Val);[/mw_shl_code]

motoedy

回复【2楼】正点原子:
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直接定时器那当然可以，
只是因为之前用430都是用比较模块这么搞的，
假如我就想用这个来定四个不同的时间，不可行么？
既然可以做输出，那做定时应该绰绰有余吧？
要怎么搞呢 ？