STM32高级定时器死区疑问

只看该作者 · 2013-5-29 09:16

本帖最后由 zxh11d 于 2013-5-29 09:18 编辑

在用STM32做SVPWM输出时发现不管怎么修改配置，都是N通道先拉低，然后P通道在死区之后才拉高，请问有办法让这个逻辑翻过来吗？

只看该作者 · 2013-5-29 09:18

本帖最后由 zxh11d 于 2013-5-29 09:20 编辑

上图中，1通道是N，2通道是P。因为外面的驱动电路有个反相的过程，所以这个地方如果能够取个反的话，就刚好能够匹配了。

只看该作者 · 2013-5-29 09:22

定时器配置代码如下：
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef       TIM_OCInitStructure;
TIM_BDTRInitTypeDef    TIM_BDTRInitStructure;
NVIC_InitTypeDef       NVIC_InitStructure;

/* Enable the TIM1 BRK Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//TIM1_UP_PRIORITY;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE); // TIM1 Full Remap
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 , ENABLE);

//  /* GPIOE Configuration: BKIN pin */
//  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
//  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
//  GPIO_Init(GPIOB, &GPIO_InitStructure);
TIM_DeInit(TIM1);
  /* Automatic Output enable, Break, dead time and lock configuration*/
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;             //定时器不工作时输出无效电平
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Disable;

TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;             //死区时间可随时设置
TIM_BDTRInitStructure.TIM_DeadTime = DEADTIME/*100*/;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;//Enable;    //制动使能
TIM_BDTRInitStructure.TIM_BreakPolarity       = TIM_BreakPolarity_Low;       //低电平有效
TIM_BDTRInitStructure.TIM_AutomaticOutput    = TIM_AutomaticOutput_Disable; //自动输出不使能
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Period             = TS/2;
TIM_TimeBaseStructure.TIM_Prescaler          = 0;
TIM_TimeBaseStructure.TIM_ClockDivision       = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode          = TIM_CounterMode_CenterAligned1; //TIM中心对齐模式1计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter    = 1;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

/* Channel 1, 2,3 and 4 Configuration in PWM mode */
// TIM_OCInitStructure.TIM_OCMode    = TIM_OCMode_PWM1; // 输出电平
TIM_OCInitStructure.TIM_OCMode    = TIM_OCMode_PWM2; // 输出电平
TIM_OCInitStructure.TIM_OutputState  = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity  = TIM_OCNPolarity_High;
// TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
// TIM_OCInitStructure.TIM_OCNPolarity  = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState  = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC3Init(TIM1, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_ITConfig(TIM1, TIM_IT_Break,ENABLE);
TIM_ITConfig(TIM1, TIM_IT_Update,DISABLE);
TIM_Cmd(TIM1, ENABLE);
TIM_CtrlPWMOutputs(TIM1, DISABLE);