RaspNet is the Network constructed with several Raspberry Pi. The RaspNet uses the ISO/OSI layering model depicting the several layers of protocols. This code has implemented from the Layer 1 to the Layer 3.
Here is the Raspnet to download the file.
1. Layer 1 - Physical Layer
- The lowest layer describes how bits are sent over the wires. There are two wires used from one node to the next.
2. Layer 2 - Data Layer
- Using the service of layer 1 to send bits, layer 2 bundles them together to send network frames.
- Data send begins with a preamble of "01111110".
- The frame is constructed of CRC(32bits), SIZE(8bits) and Payload(2008bits).
3. Layer 3 - Network Layer
- The third layer handles addressing and routing of packets.
- The Layer 3-packet is contructed of Destination(8bits), Source(8bits) and Payload(1992bits).- main.c
- init_setup.h
- extra.c
- layer2.h
- layer2.c
- layer3.h
- layer3.c
- user_input.c
- interrupt.h
- interrupt.c
Using Minicom to see the receiving and sending datas.
1. Connect the Physical Line to another Pi
- Input: PD2(receive data), PD3(receive clock)
- Output: PB1(send clock), PB2(send data)
2. Open Minicom
3. make run: to compile and flash the source code to Atmega.
4. Input Destination I(0:Broadcast) on the Minicom console
5. Input SIZE of data to send
6. Input data to send(1 or 0)Jongseo Choi