??? 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;???? /* 自動(dòng)重裝載值 */
??? TIM_TimeBaseInitStructure.TIM_Prescaler = PWM_PSC;? /* 定時(shí)器分頻 */
??? 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);
開中斷
??? TIM_ITConfig(X_TIM, TIM_IT_CC3, ENABLE);
這樣配置對(duì)面？中斷里面設(shè)置比較值沒有用？
??????? 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
有例程嗎？
