Question

Write an AVR C program to transmit serially the message “Covid-19 will ends in 2021” continuously at 67,800 baud rate.

Answer 1

ed desume XTAL = 11.0592 M413 clock frequency of timer clock $=($1.0592 MHz/m)/m- 28,80048 period of each clock tick. To -\ |= 125,800 Devation of Timer : n* To 67800 baud → Duration of i word 467800 NXTO -- nx 1467800 Time 167300 n = 61.67800 28806 67860 0.42 Program sht zo 4800 Rogram sal = 0, 67,800 Bd ShO BIT Pl.2 starting position MAIN : 4800 default baud Rate ORG OH Мо\/ TMOD, #20H MOV THI, 4-6 MOV. SCON, #sof SETB TRI

е ТВ make sw an input St : TNB SW SLOWSP Check sw states Μον А, Рco ! Read PCON SETB Acc 7 -- Set Smoo High for 67800 MOV POON, A write PLON SJMP OVER send message. SLOwsp: MOV A POON I read POON CLR ACC , 7 I make OVER - smod Low for 4800 MOV PCON A I write PCON : MOV DP TR, #MESSI ? lood address to (stat. CLR A MOV A @A+ OPTR : Dead Value ; check for end of line. A CALL SENDCOM Send value to Serial fort move to next Volue SJMP EN Refeat JZ SI INC OPTR SENOCOM : MOV SBUF , A HERE : JNB TI, HERE i place value in buffer wait until transmitted clear CLR TI RET : retuer A COVID-19 will ends in 2021" MESSI OB END