求助，stm32定时器1仿真出来不同的波形是相反的

h505459004 · 发表于 2019-7-16 17:41:14

MDK5的仿真，在stm32上使用的定时器1，每个通道都是设置的都是一样的，仿真的波形通道1和通道2与通道3、4相反？这是怎么回事？能够弄成一样的吗？求大佬帮忙解答一下，谢谢了。代码，是根据别人的改写的
void Pwm_Init(void)
{
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10 | GPIO_Pin_9 |GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

TIM_TimeBaseInitStructure.TIM_ClockDivision =TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_Prescaler = 71;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 999;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;

TIM_OC4Init(TIM1,&TIM_OCInitStructure);
TIM_OC3Init(TIM1,&TIM_OCInitStructure);
TIM_OC2Init(TIM1,&TIM_OCInitStructure);
TIM_OC1Init(TIM1,&TIM_OCInitStructure);

TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_CtrlPWMOutputs(TIM1, ENABLE);
TIM_Cmd(TIM1,ENABLE);

}