Single chip - serial port and PC communication

First, first, the serial debugging tool is sent to the single-chip microcontroller. After receiving the data, then send the data to the PC, and then observe the transmitting result through the serial debugging tool, that is, the transmission and reception of the PC to the microcontroller. Due to local simulation, it is necessary to install the virtual serial port. The PC is set to COM1 port. The MCU's Compim is set to COM2. The baud rate is 9600. Org 0000h Ajmp main Org 0023h AJMP AA Org 0030h Main: MOV Scon, # 50h Setting the single chip serial port mode 1 receive MOV TMOD, # 20H timer T1 works in timing mode 2 MOV PCON, # 00H serial port = 0, FOSC = 11.0592m MOV TH1, # 0fdh Timer T1 initial value = fdh, generate 9600 baud rate MOV TL1, # 0fdh Setb EA Setb ES Setb TR1 CLR F0 ; F0 = 0 receive MOV A, SBUF ; Start the serial port receiving data SJMP $ AA: JB F0, TRS Setb f0 CLR ri ; Remove the RI flag after receiving a data MOV SCON, # 40h sets the single-chip serial port mode 1 Send MOV SBUF, A ; Start the serial port transmission data Reti TRS: CLR Ti ; Clear TI flag after sending a data CLR F0 MOV SCON, # 50h sets the single-chip serial port mode 1 receive MOV A, SBUF ; Start the serial port receiving data Reti End, read full text

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