TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);函数的作用就是修改这个位: #defineTIM_CCMR1_OC1PE ((uint16_t)0x0008)#defineTIM_OCPreload_Enable ((uint16_t)0x0008)voidTIM_OC1PreloadConfig(TIM_TypeDef*TIMx, uint16_t TIM_OCPreload) { uint16_t tmpccmr1=0; tmpccmr1= TIMx->CCMR1; ...
首先我们所用的“输出比较寄存器1(TIMx_CH1CVR)”实际上均是由两个寄存器组成的:Preload register(预装载寄存器)+ Shadow register(影子寄存器) 如果OC1PE=0,即不使能CH1CVR的预装载功能,则修改TIMx_CH1CVR寄存器的值就是操作影子寄存器,新的CH1CVR的值会立即生效。 如果OC1PE=1,即使能CH1CVR的预装载功能,则...
TIM_OCInit(TIM3, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); TIM_OCInitStructure.TIM_Channel = TIM_Channel_3; TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OCInit(TIM3, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable); TIM_OCInitStructure...
TIM_Cmd(TIM3, ENABLE);//使能TIM3 5.使能TIM3的预装载寄存器 使能TIM3在CCR3上的预装载寄存器 TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable); ///使能TIM3在CCR3上的预装载寄存器,即TIM3_CCR3的预装载值在更新事件到来时才能被传送至当前寄存器中。 TIM_ARRPreloadConfig(TIM3, ENABLE); //使能TIM3...
TIM_ARRPreloadConfig(TIM2, ENABLE);//TIM_OCPreload_Enable TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE); // STM3210B-LK1, set PC.04 - PC.07 GPIO_SetBits(GPIOC, GPIO_Pin_4 |GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7); ...
TIM_OC1Init(TIMX, &TIM_OCInitStructure);//选择通道1并且把上述参数传递进去。 TIM_OC1PreloadConfig(TIMX, TIM_OCPreload_Enable); 注意我上面有a,b,c三个值选择她们我们来配置PWM的周期和占空比 PWM频率: Freq = CK_PSC(一般为72) / (b + 1) / (a + 1) ...
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM1, ENABLE); TIM_SelectOutputTrigger(TIM1,TIM_TRGOSource_Update); ...
以下是tim_oc1preloadconfig函数的实现示例代码: void tim_oc1preloadconfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPreload) { if (TIMx == TIM1 TIMx == TIM8) { if (TIM_OCPreload == TIM_OCPreload_Enable) { TIMx->CR1 = TIM_CR1_OC1PE;使能OC1预装载 } else { TIMx->CR1 &= ~TIM_CR1...
TIM_OCInit(TIM2, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable); TIM_ARRPreloadConfig(TIM2, ENABLE);//TIM_OCPreload_Enable TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE); ...
1. 不理解TIM_OC2Init、TIM_OC2PreloadConfig、SetCompare2中2的含义 TIM_OC2Init(TIM2,&TIM_OCInitStrue); TIM_OC2PreloadConfig(TIM2,TIM_OCPreload_Enable); TIM_SetCompare2(TIM2,4500); OC2Init、OC2PreloadConfig、SetCompare2中的2是频道2的意思,即这里设置了TIM_CH2的功能 ...