定时器PWM控制直流电机

*关于频率和占空比的确定，对于12M晶振，假定PWM输出频率为1KHZ,这样定时中断次数 *

*设定为C=10，即0.01MS中断一次，则TH0=FF,TL0=F6 由于设定中断时间为0.01ms，这样*

*可以设定占空比可从1-100变化。即0.01ms*100=1ms-Timer DC motor* PWM control frequency and duty cycle on the determination of the 12M crystal, assumed that the PWM output frequency 1KHZ, so the number of timer interrupt** set C = 10, which 0.01MS interrupted once, then TH0 = FF, TL0 = F6　as set interrupt time 0.01ms, so* you can set the duty cycle changes from 1-100. That is 0.01ms* 100 = 1ms