void TIM1_PWM_RmapInit(u16 arr, u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_DeInit(TIM1);//初始化TIM1寄存器
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设和AFIO复用功能模块时钟
GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); //Timer1完全重映射 TIM1_CH1->PE9
// 设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形 GPIOE.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_11 | GPIO_Pin_13 | GPIO_Pin_14 ; //TIM1_CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化GPIO
// TIM_InternalClockConfig(TIM1);//使用TIM1内部时钟
TIM_TimeBaseStructure.TIM_Period = arr;//f=72MHz/2/(3600+1)=10K
TIM_TimeBaseStructure.TIM_Prescaler = psc;//2分频
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
// TIM_TimeBaseStructure.TIM_RepetitionCounter=0;//重复寄存器，用于自动更新pwm占空比
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
//TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Disable;//选择互补输出比较状态
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//设置输出极性
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; //设置互补输出极性
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //空闲状态下得非工作模式
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //互补空闲状态下得非工作模式
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_Pulse = arr / 2;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_Pulse = arr / 2;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel3 */
TIM_OCInitStructure.TIM_Pulse = arr / 2;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel4 */
TIM_OCInitStructure.TIM_Pulse = arr / 2;
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
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