请教一个高级定时器的问题
请教大家一个高级定时器的问题。
static void TIM1InitP(void)
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_TIM1);
TIM_DeInit(TIM1);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
RCC_ClocksTypeDefrccClocks;
RCC_GetClocksFreq(&rccClocks);
TIM_TimeBaseStructure.TIM_Prescaler = 84;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period =84-1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(PULSE_0_TIM, &TIM_TimeBaseStructure);
TIM_OCInitTypeDefTIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
TIM_OCInitStructure.TIM_Pulse = (TIM_TimeBaseStructure.TIM_Period+1)/2-1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_SelectOnePulseMode(TIM1, TIM_OPMode_Single);
TIM_Cmd(TIM1,DISABLE);
}
如上图的PWM去驱动 伺服驱动器的时候，发现修改 PSC 和 ARR 的值 并不影响驱动器每分钟的转速。
影响转速的是 RCR。
所以上图中， PSC和ARR，和 RCR 的功用怎么解释？
eric2013 发表于 2024-4-11 15:50
谢谢解答！
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