me To practice handling interrupts using Interrupt Service Routine (ISR). . To practice using Timers PWM to drive DC motors In the first part of this lab you will use interrupts. There can be many sources for interrupts in the AVR micro-controller. For example, it can be a timer reaching a certain count or a signal from the analog-to-digital converter indicating the end of conversion. However, this lab uses an external signal to a specific pin on the microcontroller as a source of interrupt. When an interrupts occurs, the ISR function is executed. As soon as the ISR function complete place it left off when the interrupt occurred. the program returns to the The second part of this lab deals with PWM, duty cycles, and driving DC motors. We will use timers to control the duty cycle of a signal. Pre-Lab: You are requested to complete this pre-lab before coming the next lab session Lab instructor will check and evaluate your work at the beginning of the lab session. PART 1: The ATmega8 microcontroller shown in Figure 1 uses an external interrupt (INTO): LEDO R1 Figure 1: Practicing External Interrupt using ATmega8 ?Controller In normal operation, the LED LEDO blinks indefinitely (i.e. forever) at a fixed rate of 1 Hz. * When an interrupt occurs (i.e. when switch SWo is closed), the output displayed on the LEDs LED1- LED4 is incremented by 1. Then, the program returns to normal operation as stated above Complete the C program lab2_prelab_1.c (posted on Moodle). Look for comments that begin with// Student Then, test the program using AtmelStudio and Proteus. PART 2: Solve Taskl of PART 2 of the lab (Page 3). me To practice handling interrupts using Interrupt Service Routine (ISR). . To practice using Timers PWM to drive DC motors In the first part of this lab you will use interrupts. There can be many sources for interrupts in the AVR micro-controller. For example, it can be a timer reaching a certain count or a signal from the analog-to-digital converter indicating the end of conversion. However, this lab uses an external signal to a specific pin on the microcontroller as a source of interrupt. When an interrupts occurs, the ISR function is executed. As soon as the ISR function complete place it left off when the interrupt occurred. the program returns to the The second part of this lab deals with PWM, duty cycles, and driving DC motors. We will use timers to control the duty cycle of a signal. Pre-Lab: You are requested to complete this pre-lab before coming the next lab session Lab instructor will check and evaluate your work at the beginning of the lab session. PART 1: The ATmega8 microcontroller shown in Figure 1 uses an external interrupt (INTO): LEDO R1 Figure 1: Practicing External Interrupt using ATmega8 ?Controller In normal operation, the LED LEDO blinks indefinitely (i.e. forever) at a fixed rate of 1 Hz. * When an interrupt occurs (i.e. when switch SWo is closed), the output displayed on the LEDs LED1- LED4 is incremented by 1. Then, the program returns to normal operation as stated above Complete the C program lab2_prelab_1.c (posted on Moodle). Look for comments that begin with// Student Then, test the program using AtmelStudio and Proteus. PART 2: Solve Taskl of PART 2 of the lab (Page 3)
