Design a Stop Watch System using ATmega32 microcontroller,
Use ATmega32 Microcontroller with frequency 1Mhz.
Timer1is used here and configured withCTC modeto count the Stop Watch time.Six Common Anode 7-segmentsis used .- The six 7-segments in the project is connected using the
multiplexed technique. and one7447 decoderfor all 7-segments and control the enable/disable for each 7-segement using a NPN BJT transistor connect to one of the MCU pins. - We can connect more than one 7-segment display by using the Multiplexing method. In this method, at a time one 7-segment display is driven by the Microcontroller and the rest are OFF. It keeps switching the displays using transistors. Due to the persistence of vision, it appears as a normal display.
- The 7447 decoder 4-pins is connected to the first 4-pins in
PORTC. - The first 6-pins in
PORTAis used as the enable/disable pins for the six 7-segments. - Stop Watch counting should start once the power is connected to the MCU.
- External Interrupts Configurations and Usage as Below:
| External Interrupt ID | Usage | Interrupt Triggering Edge | Push Button Connection |
|---|---|---|---|
| External INT0 | RESET Stop Watch | FALLING Edge | Internal PULL-UP resistor |
| External INT1 | PAUSE Stop Watch | RISING Edge | External PULL-DOWN resistor |
| External INT2 | RESUME Stop Watch | FALLING Edge | Internal PULL-UP resistor |
- GPIO (General Purpose Input Output)
- External Interrupts
- Common Macros
- Timer1 Implemented inside StopWatch.c
To deploy this project
Install the Following Software:
