˹̽TIM8 ΪPWM Ĳ

ʾܽܣ
	EBUS ¼PWMתӵ
	TIM8_CH0  | PB3 
	TIM8_CH0N | PB0 -- ı䵽 --> PB2
	TIM8_CH1  | PB4 -- ı䵽 --> PB1 
	TIM8_CH1N | PB1 -- ı䵽 --> PB0 
	TIM8_CH2  | PB5 -- ı䵽 --> PA14
	TIM8_CH2N | PB2 -- ı䵽 --> PA12
	
1. PWMʾ 
	Ƶʣ96M
	PWMƵʣ16K
	
	ʱڼ㹫ʽ(period+1)/Freq *(Prescaler+1)
	                   = (2999+1)/96000000 * (0+1)
					   =  0.00003125s
	Ķ *2  = 0.00003125s * 2  = 0.0000625s
				 Ƶ  = 1/0.0000625 = 16000HZ

