INSTRUCTIONS FOR SERIAL PORT PROTOCOL

This folder contains the base code of the serial port protocol.

Contributors and Grade

Grade: 20/20

bin/: Compiled binaries.
src/: Source code for the implementation of the link-layer and application layer protocols. Students should edit these files to implement the project.
include/: Header files of the link-layer and application layer protocols. These files must not be changed.
cable/: Virtual cable program to help test the serial port. This file must not be changed.
main.c: Main file. This file must not be changed.
Makefile: Makefile to build the project and run the application.
penguin.gif: Example file to be sent through the serial port.

Edit the source code in the src/ directory.
Compile the application and the virtual cable program using the provided Makefile.
Run the virtual cable program (either by running the executable manually or using the Makefile target):
```
$ sudo ./bin/cable_app
$ sudo make run_cable
```
Test the protocol without cable disconnections and noise
- 4.1 Run the receiver (either by running the executable manually or using the Makefile target):
```
 $ ./bin/main /dev/ttyS11 rx penguin-received.gif
 $ make run_tx
 
```
- 4.2 Run the transmitter (either by running the executable manually or using the Makefile target):
```
 $ ./bin/main /dev/ttyS10 tx penguin.gif
 $ make run_rx
```
- 4.3 Check if the file received matches the file sent, using the diff Linux command or using the Makefile target:
```
 $ diff -s penguin.gif penguin-received.gif
 $ make check_files
```
Test the protocol with cable disconnections and noise
- 5.1. Run receiver and transmitter again
- 5.2. Quickly move to the cable program console and press 0 for unplugging the cable, 2 to add noise, and 1 to normal
- 5.3. Check if the file received matches the file sent, even with cable disconnections or with noise