【求助】STM32控制无刷电机TIM1配置PWM方式
求大神详解STM32控制无刷电机TIM1配置PWM方式 ST有例程... 20HZ 的PWM 调整占空比就可以驱动无刷电机了 是20KHz吧，我基本会配置，就是有那么一层薄薄的窗户纸没破 用中央对齐模式就可以了！ 就是用的中央对齐模式，因此在此模式下就配置了重新计数为1，总是感觉有点不透彻的感觉，很不舒服 GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; // 基本结构体变量定义
TIM_OCInitTypeDef TIM_OCInitStructure; // 输出结构体变量定义
TIM_BDTRInitTypeDef TIM_BDTRInitStructure; // 死区刹车结构体变量定义
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;// TIM1输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // 复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // 输出频率50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;// TIM1输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // 复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // 输出频率50MHz
GPIO_Init(GPIOB, &GPIO_InitStructure);
TIM_DeInit(TIM1);
TIM_TimeBaseStructure.TIM_Prescaler = 0; // TIM预分频0
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned2;// 中央对齐计数模式
TIM_TimeBaseStructure.TIM_Period = 3600; // PWM 72000000/3600/2=10000=10KHz
TIM_TimeBaseStructure.TIM_ClockDivision = 0; // 时钟分割为0
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; // 重复计数器1
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; // PWM2输出模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable; // 禁止输出
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;// 禁止互补输出
TIM_OCInitStructure.TIM_Pulse =360; // 初始占空比为360/3600=0.1=10%
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; // 比较输出极性高有效
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; // 互补输出极性高有效
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; // 当MOE=0重置TIM1输出比较空闲状态
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; // 当MOE=0重置TIM1输出比较N空闲状态
TIM_OC1Init(TIM1,&TIM_OCInitStructure);
TIM_OC2Init(TIM1,&TIM_OCInitStructure);
TIM_OC3Init(TIM1,&TIM_OCInitStructure);
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; // 死区刹车初始化
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
TIM_BDTRInitStructure.TIM_DeadTime = 100;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; // 打开刹车
TIM_BDTRInitStructure.TIM_BreakPolarity =TIM_BreakPolarity_Low ;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable); // 使能捕获比较寄存器预装载（通道1）
TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_SelectInputTrigger(TIM1, TIM_TS_ITR2);
TIM_CtrlPWMOutputs(TIM1,ENABLE);
TIM_ClearITPendingBit( TIM1, TIM_IT_COM); // 清除TIM1的中断待处理位
TIM_ITConfig(TIM1, TIM_IT_COM ,ENABLE); // 使能指定的TIM1中断
TIM_Cmd(TIM1,ENABLE); foxpro2005 发表于 2014-6-21 10:47
ST有例程...
新手，能给个链接吗？ 楼主能给个PWM控制无刷电机定位，或者运动的程序吗？ 7楼的问题，我也觉得奇怪，重复计数设置成0,上下溢出都触发中断，好像和中心对齐模式设置没关系！ mandzy 发表于 2014-6-21 20:30
是20KHz吧，我基本会配置，就是有那么一层薄薄的窗户纸没破
void BLDC_SwitchStep(void)
{
switch (Step)
{
case 0 ://3,2
/*PhaseA configuration */
TIM_CCxCmd(BLDC_TIMER_NUM, TIM_Channel_1, TIM_CCx_Disable); // 0
TIM_OC1NPolarityConfig(BLDC_TIMER_NUM, TIM_OCNPolarity_High);
TIM_CCxNCmd(BLDC_TIMER_NUM, TIM_Channel_1, TIM_CCxN_Disable); // 0
/*PhaseB configuration */
TIM_CCxCmd(BLDC_TIMER_NUM, TIM_Channel_2, TIM_CCx_Enable); // 1
TIM_CCxNCmd(BLDC_TIMER_NUM, TIM_Channel_2, TIM_CCxN_Enable);//同步整流
/*PhaseC configuration */
TIM_CCxCmd(BLDC_TIMER_NUM, TIM_Channel_3, TIM_CCx_Disable); // 0
TIM_OC3NPolarityConfig(BLDC_TIMER_NUM, TIM_OCNPolarity_Low);
TIM_CCxNCmd(BLDC_TIMER_NUM, TIM_Channel_3, TIM_CCxN_Enable); // 1
break;
case 1: //1,2
你懂的
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