Robotic & Microcontroller Educational Knowledgepage - Network of Excellence

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====== 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 display the messages the baud rate has to be selected.  To select
it the keys on the board ("KEY1" and "KEY2", not the RESET-key) have to be
used.  "KEY1" changes the baud rate shown in the display from 10 kbps up to
1 Mbps.  When the desired baud rate is shown in the display it has to be con-
ﬁrmed by pressing "KEY2". Now the controller can show the CAN messages on
the display.

{{  :en:hardware:arm-can:aufbau3.jpg?500  |Figure 1.20: LC Display connection}}

Figure 1.20: LC Display connection