ʾʹõԴ



ʾḶ́
1ϵʱӣPLL 48MHz
2TIM8¼ʱжϣ

ע⣺
1TIM8ʱ = PCLK1 = HCLK = HCLK = SystemCoreClock = 48MHz
2TIM8ļʱΪ10kHzTIM8ԤƵΪ
   prescal = (SystemCoreClock /10 kHz) - 1 = 0x12BF
   TIM8ԶֵΪ10000 - 1= 0x270F
3TIM8ĸ¼ƵΪ1Hz1sһθ¼