ʾʹõԴ
IR_OUT      PB9
UART4_RX    PD5

ⷢͶIR_OUTӣնUART_RX

ʾḶ́
1ϵʱӣPLL 48MHz
2ʼIRTIMIR_OUTGPIOʼUART4_RXGPIO
3ʼIRTIMزźԴTIM4TIM4_CH138KHzռձ50%PWMźţ
4ʼIRTIMĵźԴUART4UART4Ϊ2400Ĵݣ
5IRTIMزźͬʱUART1_RXͨͷսźš

