初始化EVA，使得PWM1和PWM2输出互补的周期为1KHz的PWM波，占空比初始化 10 ，死区时间为4.27us。-Initialize the EVA, makes the PWM1 and PWM2 output complementary PWM wave for a period of 1 KHZ, 10 duty cycle is initialized, dead zone of 4.27 us.