Write a program to generate a rectangular wave of 1 Khz, having a 25% duty cycle from the TxD pin of 8051, using timer1. Assume XTAL of 12Mhz.

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written 7.2 years ago by

liviavaz • 230

modified 5.1 years ago by

ninadsail • 10

microcontroller and applications

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written 7.2 years ago by

liviavaz • 230

                   MOV TMOD, #10H               ; timer1 set in mode1
     UP:           MOV TL1,  #06H               ; load lower byte of count 
                   MOV TH1,  #0FFH              ; load upper byte of count 
                   SETB      P3.1               ; Display 1 at Txd pin 
                   MOV TCON, #40H               ; Program TCON
     ON:           JNB TCON.7, ON               
                   CLR       P3.1               ; Clear Txd …

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