Two 8031 ​​single-chip microcomputer exchanged data exchange

There are two 8031 ​​microcontrollers, and they are directly connected to their serial ports. The 1 # machine TXD picks 2 # machine RXD, 2 # machine TXD picks 1 # machine RXD, the second machine's GND is connected. The crystal frequency of the second machine is 11.0592 MHz, and the baud rate of communication is 4800 bps. The data within the first 8031 ​​single-chip unit is now transmitted to the second unit 8031 ​​single-chip unit in the second 8031 ​​single-chip unit. Be The reference program sent and received is as follows: 1 # MCU sending program: ORG 1000H TX: MovtMod, # 02h Movth1, # 0fah MovTL1, # 0fah Movscon, # 80h; Set work mode 2 MovpCon, # 00H; Porture rate is FOSC / 64 SetBTR0 MOVR0, # 40h; Address pointer to send data MOVR2, # 20h; set the transmission data length LOOP: MOVA, @ r0; take the send data to send a MOVC, PSW.0 MovTB8, C; parity to send TB8 Movsbuf, A; start sending Wait: JBCTI, LL1; Judgment Interrupt Sign SJMPWAIT LL1: INCR0 Djnzr2, Loop RET 2 # MCU Receiver: ORG 1000h Rx: Movtmod, # 02h Movth1, # 0fah MovTL1, # 0fah Movscon, # 90h; Setting working 2 and allowing reception Movpcon, # 00H SetBTR0 Movr0, # 60h Movr2, # 20h LOOP: JBCRI, MM1; Waiting for receiving data SJMPLOOP MM1: MOVA, SBUF; read a frame of data JBPsw.0, PP1; judgment receiver parity JBRB8, ERROR; judgment SJMpright PP1: JNBRB8, Error; Receiving an error Right: Mov @ r0, a; receive correct INCR0 Djnzr2, Loop Error: setbpsw.5; set an error sign RET, read full story

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