用TIM3輸出思路PWM波，IO口選擇了PC6，PC7,PC8,PC9編譯了一下出現問題，說是 identifier "GPIO_PinSource_6" is undefined，就是GPIO_PinSource_6|GPIO_PinSource_7|GPIO_PinSource_8|GPIO_PinSource_9未定義；
然后我只把GPIO_InitStructure.GPIO_Pin = GPIO_PinSource_6|GPIO_PinSource_7|GPIO_PinSource_8|GPIO_PinSource_9; //GPIOC6789
這一行的改成GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; //GPIOC6789
編譯沒出錯，是否編譯正確還沒進一步確定，我想問一下這樣子對嗎？為什么那一行用GPIO_PinSource就不可以呢？
代碼如下：
void TIM3_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); //TIM3時鐘使能
// RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); //使能PORTF時鐘
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
// RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//
GPIO_InitStructure.GPIO_Pin = GPIO_PinSource_6|GPIO_PinSource_7|GPIO_PinSource_8|GPIO_PinSource_9; //GPIOC6789
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //復用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽復用輸出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_TIM3);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_TIM3);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_TIM3);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_TIM3);
TIM_TimeBaseStructure.TIM_Prescaler=psc; //定時器分頻
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上計數模式
TIM_TimeBaseStructure.TIM_Period=arr; //自動重裝載值
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);//初始化定時器3
//初始化TIM3Channel1 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //選擇定時器模式:TIM脈沖寬度調制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比較輸出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //輸出極性:TIM輸出比較極性低
TIM_OCInitStructure.TIM_Pulse=0;//指定要加載到捕獲比較器中的脈沖值
TIM_OC1Init(TIM3, &TIM_OCInitStructure); //根據T指定的參數初始化外設TIM1 4OC1
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC3Init(TIM3, &TIM_OCInitStructure);
TIM_OC4Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIM3在CCR1上的預裝載寄存器
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM3,ENABLE);//ARPE使能
TIM_Cmd(TIM3, ENABLE); //使能TIM3
}
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