战舰v3的TIM8无法产生pwm问题

zhimaaaa · 发表于 2020-7-31 22:32:52

我最近在使用战舰v3产生12路pwm时，选择TIM3,TIM4和TIM8分别产生四路，TIM3,TIM4可以正常产生pwm，但是TIM8的通道123不产生，4通道产生，配置完全是一样的，不知道如何解决，求原子哥解答，十分感谢！下面是代码：

void TIM_PWM_Init(u16 arr,u16 ccr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM4, ENABLE); //使能定时器3、定时器4时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和定时器8、AFIO复用功能时钟，

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIO

//时基初始化TIM
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);

//初始化TIM Channel PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OCInitStructure.TIM_Pulse = ccr;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);//初始化TIM3-CH1
TIM_OC2Init(TIM3, &TIM_OCInitStructure);//初始化TIM3-CH2
TIM_OC3Init(TIM3, &TIM_OCInitStructure);//初始化TIM3-CH3
TIM_OC4Init(TIM3, &TIM_OCInitStructure);//初始化TIM3-CH4

TIM_OC1Init(TIM4, &TIM_OCInitStructure);//初始化TIM4-CH1
TIM_OC2Init(TIM4, &TIM_OCInitStructure);//初始化TIM4-CH2
TIM_OC3Init(TIM4, &TIM_OCInitStructure);//初始化TIM4-CH3
TIM_OC4Init(TIM4, &TIM_OCInitStructure);//初始化TIM4-CH4

TIM_OCInitStructure.TIM_OCNIdleState=TIM_OutputNState_Disable;
TIM_OC1Init(TIM8, &TIM_OCInitStructure);//初始化TIM8-CH1
TIM_OC2Init(TIM8, &TIM_OCInitStructure);//初始化TIM8-CH2
TIM_OC3Init(TIM8, &TIM_OCInitStructure);//初始化TIM8-CH3
TIM_OC4Init(TIM8, &TIM_OCInitStructure);//初始化TIM8-CH4

//使能TIM在CCR上的预装载寄存器
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);

TIM_OC1PreloadConfig(TIM8, TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM8, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_ARRPreloadConfig(TIM4, ENABLE);
TIM_ARRPreloadConfig(TIM8, ENABLE);

TIM_Cmd(TIM3, ENABLE);
TIM_Cmd(TIM4, ENABLE);

TIM_Cmd(TIM8, ENABLE);
TIM_CtrlPWMOutputs(TIM8, ENABLE);

}