1.5 CAN FD Blocking
This example application shows how to use the CAN module to transmit and receive CAN FD messages in polling mode.
Description
This application transmits CAN FD message to CAN Bus and receives CAN FD message from CAN Bus. To run this application, two evaluation boards of same type are required. These boards acts as different nodes on the CAN bus. Same application is programmed onto both the boards. Boards are connected to PC via UART. While running the application, user can send and receive CAN FD messages between the boards using UART console applications running on the PC.
Downloading and Building the Application
To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.
Path of the application within the repository is apps/can/can_fd_operation_blocking/firmware.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| pic32cm_gc_curiosity_pro.X | MPLABX Project for PIC32CM GC00 Curiosity Pro Board |
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Board |
|---|---|
| pic32cm_gc_curiosity_pro.X | PIC32CM GC00 Curiosity Pro Board |
Setting Up PIC32CM GC00 Curiosity Pro Board
- Connect PIC32CM GC00 Curiosity Pro Board to another PIC32CM GC00 Curiosity Pro Board as per the pin connections shown below
| PIC32CM GC00 Curiosity Pro board - 1 | PIC32CM GC00 Curiosity Pro board - 2 |
|---|---|
| CANH, CAN0 (J502) | CANH, CAN0 (J502) |
| CANL, CAN0 (J502) | CANL, CAN0 (J502) |
| GND, EXT1 PIN19 | GND, EXT1 PIN19 |
- Connect the Debug USB port on the board to the computer using a micro USB cable
Running the Application
- Open the Terminal application (Ex.: Tera term) on the computer
- Connect to the EDBG Virtual COM
port and configure the serial settings as follows:
- Baud : 115200
- Data : 8 Bits
- Parity : None
- Stop : 1 Bit
- Flow Control : None
- Build and Program the application using its IDE
- In the console associated with board 1, press “0” to transmit a CAN FD message
- Transmitted message description and status will be displayed in the console window of board 1
- Received message will be displayed in the console window of board 2
- Follow the sequence below to send
and receive different messages:
- Press ‘1’ on board 1
- Press ‘2’ on board 1
- Press ‘3’ on board 1
- Press ‘4’ on board 1
- Press ‘0’ on board 2
- Press ‘1’ on board 2
- Press ‘2’ on board 2
- Press ‘3’ on board 2
- Press ‘4’ on board 2
- If the steps are executed in this
sequence, the final output in the consoles will be as below (console on the left
is the transmitter (board 1) and the one on the right is receiver (board
2)):
