• Author / Uploaded
• Dwiky Erlangga

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• Clases de computadoras
• Electrónica
• Electrónica digital
• Ingeniería Electrónica
• Equipo de oficina

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Basic Calculator Flowchart for 8051 Start

LCD initialization

A

Fill the look-up table with LCD initialization codes

Read Input

Calculate Result

Print output

OP = ADD? Result is Negative? YES YES

LCD initialization

Add the two operands and save results

Read Key

NO

Set the DPTR with look-up table start address

Result < 10?

YES

Calculate Result

Sub the two operands and save results

Print valid input on LCD

Clear ACC

YES NO Convert result to ASCII then print on LCD

OP = MUL?

Print Output

Convert numbers from ASCII to Bin by masking higher nibble

Get code from ROM and placing in into ACC

YES Divide result by 10 Multibly the two operands and save results

A

NO

Save Operands/ Operation in RAM byte for each one

Increment DPTR for next code

Convert Quotient to ASCII then print to LCD OP = DIV?

ACC = ZERO?

YES

RET

NO

Have entered operands and operation?

YES

NO

OP = SUB?

Check If Valid

Read Input

Get the 2's complement to result and print “-“

NO

YES Divide the two operands and save results

NO

Convert remainder to ASCII then print on LCD

RET

RET

RET

NO