ʾʹõԴ
TIM3 CH1     --   PB4
TIM3 ETR     --   PC10

ʾḶ́
1ϵʱӣPLL 48MHz
2TIM3ͨ1壻
   ETRΪĴԴЧ;
3⵽źЧʱ岨Σ

ע⣺
1ͨ2źŵЧصͨ1ź֮ʱΪDelay
   ͨ1źŵĿΪPulse
   
   TIM3ļʱ = 1MHzʷƵֵ psc_value = (((SystemCoreClock) / 1000000) - 1);
   
   Delay =  CC1/TIM3ʱ = (16383 / 1000000) 
   Pulse = (ARR - CC1)/TIM3ʱ = ((65535 - 16383) / 1000000) 
                                _____________________________________________
                               |  
  ETR _________________________|  
                                             ___________________________
                                            |                           |
  CH1 ______________________________________|                           |_____
                               <---Delay----><------Pulse--------------->