https://github.com/sulaimanniazi/timer-based-digital-stopwatch
Digital stopwatch using Timer1. Displays elapsed time over UART in the format MM:SS:MS.
https://github.com/sulaimanniazi/timer-based-digital-stopwatch
embedded embedded-c embedded-systems interrupt interrupt-driven-programs interrupt-handler interrupt-handling interrupts mplab mplab-ide mplabx mplabxide pic12f1572 pic16f877a proteus stopwatch stopwatch-application timer uart usart
Last synced: 3 months ago
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Digital stopwatch using Timer1. Displays elapsed time over UART in the format MM:SS:MS.
- Host: GitHub
- URL: https://github.com/sulaimanniazi/timer-based-digital-stopwatch
- Owner: SulaimanNiazi
- Created: 2025-02-25T11:01:50.000Z (3 months ago)
- Default Branch: main
- Last Pushed: 2025-02-25T21:22:15.000Z (3 months ago)
- Last Synced: 2025-02-25T22:26:08.588Z (3 months ago)
- Topics: embedded, embedded-c, embedded-systems, interrupt, interrupt-driven-programs, interrupt-handler, interrupt-handling, interrupts, mplab, mplab-ide, mplabx, mplabxide, pic12f1572, pic16f877a, proteus, stopwatch, stopwatch-application, timer, uart, usart
- Language: Makefile
- Homepage:
- Size: 132 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Timer Based Digital Stopwatch
## Project Overview
This project implements a digital stopwatch using the PIC12F1572 microcontroller. The stopwatch uses Timer1 to count milliseconds and displays the elapsed time over UART in the format MM:SS:MS. The project is evaluated using software simulation in MPLAB X IDE.
## Objective
- Implement a digital stopwatch using Timer1.
- Display elapsed time over UART in the format MM:SS:MS.
- Use software simulation in MPLAB X IDE to evaluate functionality.
## Skills Tested
- ✅ Timer configuration (1ms resolution)
- ✅ UART data formatting (Sending real-time updates)
- ✅ Interrupt handling
- ✅ Software simulation debugging
## Task Details
1. Use Timer1 to count milliseconds.
2. Convert time to Minutes:Seconds:Milliseconds (MM:SS:MS) format.
3. Send the formatted time over UART every second.
4. Use a software breakpoint in MPLAB X to verify correct time updates.
## Table of Contents
- [Prerequisites](#prerequisites)
- [Building the Project](#building-the-project)
- [Apparatus](#apparatus)
- [Uploading to the Microcontroller](#uploading-to-the-microcontroller)
- [Usage](#usage)
- [Troubleshooting](#troubleshooting)
## Prerequisites
- MPLAB X IDE
- XC8 Compiler
- PIC16F877A Microcontroller
- Proteus (optional)
## Building the Project
1. Open the project in MPLAB X IDE.
2. Ensure the XC8 compiler is selected.
3. Build the project to generate the `.hex` or `.cof` file.
4. Alternatively, you can build the project using Visual Studio Code with the MPLAB extension. Set the project output file path, name, and extension using `Ctrl+Shift+P` and selecting "Edit Project Properties".
## Apparatus
The circuit simulation can be found [here](./Proteus%20Simulation/).
Necessary components that can't be changed:
1. PIC12(L)F1572/3 microcontroller: To run the program.
2. UART module (configured to 8bit receive with 9600 Baud rate): To receive and interpret output.
Optional components depending on your circuit:
1. Button: For start/stop.
7. 1 Resistors.
## Uploading to the Microcontroller
After building the project, upload the generated `.hex` or `.cof` file to the PIC16F877A microcontroller using a suitable programmer. The file can be found in either of the following paths:
1. In case of using MPLAB X IDE: [dist\default\debug\Timer_Based_Digital_Stopwatch.X.debug.cof](./dist/default/debug/Timer_Based_Digital_Stopwatch.X.debug.cof)
2. In case of using Visual Studio Code (if the file name was set as default): **out\Timer_Based_Digital_Stopwatch\default.hex**
## Usage
1. The code is largely customizable, however for changing USART pins please consult the [datasheet](https://ww1.microchip.com/downloads/en/devicedoc/40001723d.pdf)
## Troubleshooting
- Ensure all connections are secure and correct.
- Verify the microcontroller is programmed with the correct `.hex` or `.cof` file.
- Check the power supply to the microcontroller and other components.