GPIO_InitTypeDef GPIO_InitStructure={0};
NVIC_InitTypeDef NVIC_InitStructure = {0};
TIM_OCInitTypeDef TIM_OCInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_TIM8 | RCC_APB2Periph_AFIO, ENABLE );
GPIO_PinRemapConfig(GPIO_Remap_TIM8 , ENABLE);
GPIO_InitStructure.GPIO_Pin = X_PUL_GPIO;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( X_PUL_PORT, &GPIO_InitStructure );
TIM_TimeBaseInitStructure.TIM_Period = PWM_ARR; /* 自动重装载值 */
TIM_TimeBaseInitStructure.TIM_Prescaler = PWM_PSC; /* 定时器分频 */
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( X_TIM, &TIM_TimeBaseInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = PWM_PLU;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC3Init( X_TIM, &TIM_OCInitStructure );
TIM_CtrlPWMOutputs(X_TIM, DISABLE );
TIM_OC3PreloadConfig( X_TIM, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( X_TIM, ENABLE );
TIM_Cmd( X_TIM, ENABLE );
TIM_ITConfig(X_TIM, TIM_IT_CC3, DISABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM8_CC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
开中断
TIM_ITConfig(X_TIM, TIM_IT_CC3, ENABLE);
这样配置对面？中断里面设置比较值没有用？
Tim_Count = TIM_GetCounter(X_TIM);
tmp = 0xFFFF & (Tim_Count + g_toggle_pulse);
printf("tmP = %d\r\n",tmp);
TIM_SetCompare3(X_TIM,tmp);//修改占空比
有例程吗？
