This project is about Connecting several PIC microcontrollers using SPI to each other. One of the microcontrollers is in master mode. So, it continuously increases a variable and sends this variable to the first slave microcontroller. Then sends the increased variable to the second microcontroller. Again, after increasing the variable, it sends it to the third microcontroller.
Download the project files here.
Also, don’t forget to checkout our 16×16 dot-matrix project with AVR.