51 single chip microcomputer multi computer communication

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Only used in case of multi computer communication SM2 , In general, do not use .


TB8 It is used when sending data , And RB8 Corresponding .

The ninth digit of the data is the check digit .

The difference between serial mode 2 and mode 3 is , The baud rate of serial mode 2 is fixed , There are only two options , The baud rate of mode 3 is determined by the timer T1 Is determined by the overflow rate , That is, mode 3 is a working mode with variable baud rate .

therefore , When working in mode 3 , First, understand the communication sequence of mode 3 ,







When other events are handled between processes , If there is an interruption , Execute the corresponding interrupt program .



Each time the host key is pressed , Add... To the count result 1 , At the same time, the counting result is displayed on the nixie tube . And when the switch is grounded , Send to 1 Single chip microcomputer No . When the switch is connected to high level , Send to 2 Single chip microcomputer No . After each slave receives the data, it should display the receiving result on its own digital tube .

After sending the slave address , Or during key counting , Interrupt requests may occur .

If RB8 The value of is 1 Words , Is the address signal , If RB8 The value of is 0 Words , Data signals .

Finally, the program code and simulation are uploaded to the data file .