https://www.robolabor.ee/homelab/ 2026-04-20T15:46:35+00:00 https://www.robolabor.ee/homelab/ https://www.robolabor.ee/homelab/lib/tpl/arctic/images/favicon.ico text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/autostudy_can_circuit_diagram?rev=1595235600&do=diff Autostudy CAN Circuit Diagram [Autostudy CAN - Circuit Diagram] Autostudy CAN - Circuit Diagram Part Placement [Autostudy CAN - Part Placement] Autostudy CAN - Part Placement Parts List Qty. Value Device Parts 1 Conrad 733980-62SUPPLY1 Schottky-DIODE 11DQ06D32 Jumper, 1×2JP1, JP3, TERM2 LED3MMLED1, LED2 text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/can-functions?rev=1595235600&do=diff CAN-Functions The can_t Structure CAN communication between the used CAN boards is (on the programming level) accessed through the use of a structure named can_t which is defined in “can.h”. The structure can_t consists of variables that can be written to prepare a message for sending or read to process a received message. Here is an overview of the variables of this structure: text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/code_example_for_sending_a_can_message?rev=1595235600&do=diff Code Example for Sending a CAN Message The following code example initializes the CAN interface, creates a new object “cantx_msg” of the type can_t and prepares the sending of a CAN message. In the last step, the message data bytes are set and the function text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/controller?rev=1595235600&do=diff Controller Soldering Parts to the PCB Use the parts list (see appendix) to check if you have all the necessary parts to build the Autostudy CAN board. Alternatively, the following picture gives an overview of all the needed parts: [Figure 1.1: Parts] Figure 1.1: Parts text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/exercise_1?rev=1595235600&do=diff Exercises Exercise 1 For this exercise you will use the CAN board with the USB_CAN.hex program (board 1) and a second CAN board (board 2). Board 2 is similar to board 1, except that it is not programmed yet. You will also use the USB-CAN-Terminal program for the visualisation of CAN communication. text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/how_to_use_the_can-usb-terminal?rev=1595235600&do=diff How to Use the CAN-USB Terminal The CAN-USB terminal offers a GUI to facilitate communication between PC and CAN board via USB. The picture shows the user-interface of the CAN-USB terminal. Its purpose is to instruct the CAN board to send CAN-messages with a specified Message ID, but it is also possible to switch the LEDs on the board on and off (checkboxes in circle 7). text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/installing_the_usb_driver?rev=1595235600&do=diff Installing the USB Driver In order for the communication between the board and a PC to function, the USB driver has to be installed. Use a USB cable to connect the board to the PCB. When using windows, it will ask where to search for the software for the connected hardware (CAN board). Neglect the automatic search and select the location of the software (the USB driver) manually. text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/programming_the_can_board?rev=1595235600&do=diff Programming the CAN Board The CAN board that will be connected to the PC needs to be programmed with the provided USB_CAN.hex program. The program establishes a USB connec- tion through the emulation of a virtual COM port. Open AVR Studio without opening an existing or new project. Choose Tools’Program AVR’Connect and select the programming adapter (e.g. AVRISP mkII) and the interface (e.g., USB). text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/hardware/avr-can/the_lcd-display?rev=1595235600&do=diff The LCD Display Another way to visualize the CAN messages is to connect the LCD display as shown in the photo below. The display will show all messages transmitted on the CAN bus with its message ID. Therefore it is necessary to flash the other HEX-file (candisplay.hex) to the ATMega32 to which the display should be con- nected. After flashing the program onto it, this controller will only work with the attached display, and the board will not be able to send messages. Before the controller can d…