查看了工程demo：EVT\EXAM\TIM\PWM_Output
发现这个工程里面默认的是TIM1_CH1 也就是PA8管脚。
没有找到哪儿能设置通道，比如我想用PB8 TIM4_CH3该怎么配置？
按照这个例子，我可以配置成TIM10_CH1，同时输出波形。但是我不清楚怎么配置成TIM4_CH3。
我参考其他配置通道的用法：
void TIM1_PWMOut_Init( u16 arr, u16 psc, u16 ccp )
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_OCInitTypeDef TIM_OCInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
TIM_ICInitTypeDef TIM_ICInitStructure = {0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_TIM1 , ENABLE );
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM4, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_Init( GPIOB, &GPIO_InitStructure );
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure);
TIM_TimeBaseInit( TIM4, &TIM_TimeBaseInitStructure);
#if (PWM_MODE == PWM_MODE1)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
#elif (PWM_MODE == PWM_MODE2)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
#endif
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = ccp;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init( TIM1, &TIM_OCInitStructure );
TIM_OC1Init( TIM4, &TIM_OCInitStructure );
TIM_CtrlPWMOutputs(TIM1, ENABLE );
TIM_OC1PreloadConfig( TIM1, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( TIM1, ENABLE );
TIM_Cmd( TIM1, ENABLE );
TIM_ICInitStructure.TIM_Channel = TIM_Channel_3;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInit(TIM4, &TIM_ICInitStructure);
TIM_CtrlPWMOutputs(TIM4, ENABLE );
TIM_OC1PreloadConfig( TIM4, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( TIM4, ENABLE );
TIM_Cmd( TIM4, ENABLE );
}
但是发现无法生效。
我该如何配置是他作为TIM4_CH3来使用？
