8051 Program To Count the Number of 1s and 0s in a Number

TL;DR

Learn how to write a program in the assembly language to count the number of zeros and ones in a byte stored in the external memory location of an 805.1 microcontroller.

Transcript

hello friends in this video we are going to write a program in the ascendi language for eight zero five fun microcontroller to count the number of ones and zeros present in a number when a number is represented in binary format we use zeros and ones so to count that how many numbers of zeros and ones are present in that eight bit number we will wri... Read More

Key Insights

• 🏁 The program uses the concept of rotating the accumulator register and checking the carry flag to determine if a bit is a zero or one.
• 🔄 Two counters are used to count the number of ones and zeros separately, simplifying the counting process.
• 🤑 The R0 and R1 registers are used to store the final results of the number of ones and zeros.
• ®️ The program demonstrates the use of the 805.1 microcontroller's register banks and the data pointer register for accessing external memory.
• 🎏 Proper initialization of registers and clearing the carry flag are essential steps in the program's execution.
• 🎮 The flowchart provided in the video helps visualize the sequence of instructions and decision-making within the program.

Questions & Answers

Q: What is the problem statement for the program?

The program aims to count the number of ones and zeros in a byte stored in the external memory location 3000h using the instructions of the 805.1 microcontroller.

Q: Why are two counters used in the program?

Two counters are used to keep track of the number of ones and zeros separately. By subtracting the number of ones from 8, the program can determine the number of zeros.

Q: How does the program check if a bit is a zero or one?

The program uses the rotate left with carry instruction to shift each bit of the accumulator register. By checking the carry flag, the program can determine if the bit is a zero or one.

Q: What registers are used for counting and storing the result?

The R0 register is used to count the number of ones, and the R1 register is used to count the number of zeros. The final result is stored in these registers.

Summary & Key Takeaways

• This video tutorial explains how to write an assembly language program to count the number of zeros and ones in a byte stored in external memory.

• The program uses the accumulator register to load the byte from external memory and rotates the bits to check if they are zeros or ones.

• Two counters are used to keep track of the number of ones and zeros. The final result is stored in the R0 and R1 registers.