This repository contains assembly programs from my Microprocessors and Microcontrollers course at Vellore Institute of Technology, Chennai. The programs are developed for the 8051 microcontrollers, covering a wide range of applications and techniques in microcontroller programming.

• Task 1: Perform a move operation between A and Rn.

• Task 1: Perform addition of two 8-bit numbers, 97H and 76H, and store the result at address location 55H.
• Task 2: Perform subtraction of two 8-bit numbers, 76H and 97H, and store the result at address location 55H.
• Task 3: Perform addition of two 16-bit numbers, 3CE7H and 3B8DH, and store the result in R7 (higher byte) and R6 (lower byte).
• Task 4: Perform subtraction of two 16-bit numbers, 2762H and 1296H, and store the result in R7 (higher byte) and R6 (lower byte).
• Task 5: Perform multiplication of two 8-bit numbers present in memory address locations 33H and 34H and store the result in 35H (higher byte) and 36H (lower byte).
• Task 6: Perform division on 8-bit numbers present in memory address locations 33H and 34H and store the result in 35H (remainder) and 36H (quotient).

• Task 1: Clear the accumulator, then add 5 to the accumulator 20 times.
• Task 2: Read a temperature value (T) from RAM location 55H. According to the value, place the temperature value into the registers as such: if T=30H, then A=30H; if T<30H, then R1=T; and finally, if T>30H, then R2=T.
• Task 3: Move a block of five data starting from RAM 40H to external ROM memory 3000H onwards and perform complement operation before storing to ROM.

• Task 1: Perform logical operations of AND, OR, and XOR on two 8-bit numbers stored in internal RAM locations, 21H and 22H, and store their result in the memory locations 30H, 31H, and 32H, respectively.
• Task 2: Compare two 8-bit numbers, NUM1 and NUM2, stored in external memory locations 8000H and 8001H, respectively. According to the value, check the following: if NUM1<NUM2, SET LSB of data RAM location 2FH (bit address 78H); if NUM1>NUM2, SET MSB of location 2FH (bit address 7FH); and if NUM1 = NUM2, then CLR both LSB and MSB of bit addressable memory location 2FH.
• Task 3: Implement a half adder logic such that P0.0 (B) and P0.1 (A) be two inputs while P2.0 (carry) and P2.1 (sum) output.

• Task 1: Toggle all the bits of P0 for every 200ms. Assume the crystal frequency as 11.0592 MHz.
• Task 2: Create a square wave of 66% duty cycle on bit 3 of port 1.
• Task 3: Monitor the port pin P0.1 until it becomes high. When P0.1 becomes high, read the data from port 1 to A (b). Send a low-to-high pulse on p.0.2 to indicate that data has been read.

• Task 1: Toggle all the bits of P1 for every 500ms (0.5 seconds). Assume the crystal frequency as 11.0592 MHz. Verify the output using the 8051 Microcontroller kit.
• Task 2: Glow the LEDs connected on PORT1 one at a time in a serial fashion (from LSB to MSB) continuously with 0.5 seconds delay for each. Verify the output using the 8051 Microcontroller kit.
• Task 3: Transfer the data in port 0 serially to pin P1.0. Send high to low pulse at the start and end of the data. Send the byte LSB first. Verify the output using the 8051 Microcontroller kit.

• Task 1: Assume the crystal frequency as 11.0592 MHz. Using timers, generate a frequency of 2kHz on pin port pin P2.7.
• Task 2: Toggle a bit of P1.7 for every 1 second. Assume the crystal frequency as 33MHz. Verify the output using the 8051 microcontroller kit.
• Task 3: Assuming that clock pulses are fed into pin T1 (P3.5), in counter 1 in mode 2, count the pulses and display the state of the TL1 count on P1, which connects to 8 LEDs.

• Task 1: Transfer ‘VIT’ serially to 9600 baud, 8-bit data, 1 stop b it, and do this continuously.
• Task 2: Receive bytes of data serially and put them in P1, set the baud rate at 4800, 8-bit data and 1 stop bit.

• Task 1: Assume that XTAL = 11.0592 MHz. Employing a timer interrupt, continuously get 8-bit data from P0 and send it to P1 while simultaneously creating a square wave of 200 μs period on pin P2.1. Use timer 0 to create the square wave.
• Task 2: Assume that the INT1 pin is connected to a switch that is normally high. Whenever it goes low, it should turn on an LED. The LED is connected to P1.3 and is normally off. As long as the switch is pressed low, the LED should stay on. Simultaneously perform a toggle operation in P1.5 with a delay of 500ms.

• Task 1: Display the message “VIT” on an LCD display.
• Task 2: Display the message “VIT CHENNAI” on an LCD display using DPTR.