我想使用STM32的TIM1在通道2、3、4上产生三路PWM信号,TIM1_Configuration()如下,用的是TIM_SetCompare2(TIM1, VOL_1); TIM_SetCompare3(TIM1, VOL_2); TIM_SetCompare4(TIM1, VOL_P); 其中的VOL_1、VOL_2、VOL_P都是变量,实际测试发现当三个变量都取最大时,通道2、3正常输出最高电压,但通道4却输出最低电压,将变量都取最小时,2、3正常输出最小电压,4却输出最高电压,也就是说通道4和通道2、3刚好输出是反的,问题这是出在了哪里?求帮助
void TIM1_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseStructure.TIM_Period = 100;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
TIM1->BDTR |= 1<<15;
}