ʾʹõԴ



ʾḶ́
1ϵʱӣRCH 48MHz
2TIM1¼ʱжϣ

ע⣺
1TIM1ʱ = PCLK = HCLK = HCLK = SystemCoreClock = 48MHz
2TIM1ļʱΪ10kHzTIM1ԤƵΪ
   prescal = (SystemCoreClock /10 kHz) - 1 = 0x12BF
   TIM1ԶֵΪ10000 - 1= 0x270F
3TIM1ĸ¼ƵΪ1Hz1sһθ¼