如何在带定时器的STM32F103上为控制伺服电机生成PWM
C代码
我想通过PWM控制伺服电机
我从ADC获得值，然后计算得出PWM占空比
流程图
获取VR的值-> ADC模块（将模数转换为数字）->计算PWM占空比->使用计时器为控制伺服电机生成PWM-> while循环
对不起我的英语。
最佳答案
该代码假设APB1时钟= 72MHz
Servo_Target为八分之一微秒，因此4000表示1ms（低伺服位置），而8000表示2ms（高伺服位置）
警告：PWM频率为463Hz，因此您不能将此设置用于模拟伺服。它适用于无刷调节器。如果要使用模拟伺服，则必须更改TIM_Prescaler，TIM_Period
并考虑对Servo_Target值的影响
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 8192;
TIM_TimeBaseStructure.TIM_Prescaler = 18;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_Cmd(TIM2, ENABLE); // Start PWM Timer
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
// THIS IS THE WIDTH in 1/8 us
TIM_OCInitStructure.TIM_Pulse = Servo_Target;
/* PWM1 Mode configuration: TIM2 Channel1 */
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: TIM2 Channel2 */
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
// add OC3_ and OC4_ for 3rd and 4th channels
TIM_ARRPreloadConfig(TIM2, ENABLE);