(a) Construct a program code using AVR assembly language to read the value available on PortB...

 

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(a) Construct a program code using AVR assembly language to read the value available on PortB pins and PortC pins. Then multiply the two values and store the result (which is 2 bytes) in the memory location: 0x50 for LSB byte and Ox51 for MSB byte. Then show the result from LSB byte on PortA pins. (c) (b) Calculate the total period (T), cycles loop in LOOP1 and LOOP2, the overall loop (total cycles) and the size of delay of the program code below if the crystal frequency is 1 MHz. DELAY: LDI R21, 100 LOOP2: LDI R20, 200 LOOP1: NOP NOP DEC R20 BRNE LOOPI DEC R21 BRNE LOOP2 RET AGAIN: LDI R17, 0xFF OUT DDRB, R17 LDI R17, 0xFF OUT DEC R17 CALL DELAY RJMP AGAIN Instruction Cycles PORTB, R17 ; 2/1 [CO2, P01, C3] ; 1 ; 2/1 ;4 The following code below is written in AVR assembly language. Explain the following program line by line. Determine the value to be read from PortB to stop the loop. (Example: Line 1: //Load Ob11111111 in R17). [CO2, PO1, C3] (a) Construct a program code using AVR assembly language to read the value available on PortB pins and PortC pins. Then multiply the two values and store the result (which is 2 bytes) in the memory location: 0x50 for LSB byte and Ox51 for MSB byte. Then show the result from LSB byte on PortA pins. (c) (b) Calculate the total period (T), cycles loop in LOOP1 and LOOP2, the overall loop (total cycles) and the size of delay of the program code below if the crystal frequency is 1 MHz. DELAY: LDI R21, 100 LOOP2: LDI R20, 200 LOOP1: NOP NOP DEC R20 BRNE LOOPI DEC R21 BRNE LOOP2 RET AGAIN: LDI R17, 0xFF OUT DDRB, R17 LDI R17, 0xFF OUT DEC R17 CALL DELAY RJMP AGAIN Instruction Cycles PORTB, R17 ; 2/1 [CO2, P01, C3] ; 1 ; 2/1 ;4 The following code below is written in AVR assembly language. Explain the following program line by line. Determine the value to be read from PortB to stop the loop. (Example: Line 1: //Load Ob11111111 in R17). [CO2, PO1, C3]

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