======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).

{{  :en:hardware:arm-can:avr-studio_2.jpg?500  |Figure 1.7: AVR-Studio}}

Figure 1.7: AVR-Studio

Under Main choose Atmega32 and click on the button Read Signature.  If the
chip was recognized by AVR Studio, the text Signature matches selected device appears. Programming Mode is ISP mode, ISP frequency 125.0 kHz.

{{  :en:hardware:arm-can:insthex1.jpg  |Figure 1.8: ISP Mode}}

Figure 1.8: ISP Mode

Under Fuses, tick the boxes for JTAGEN and SPIEN to enable JTAG and SPI
programming, respectively. Choose Ext. Crystal/Resonator High Frequency.

<code c>
16KCK + 64ms
</code>
Code (1.1)

If the fuse bits are set according to the screenshot, the HIGH and LOW bytes
should read 0x99 and 0xFF, respectively.  Click the button Program to set the fuse bits on the Atmega32.  You can check the fuse bits by clicking the button
Verify.

{{  :en:hardware:arm-can:insthex3.jpg  |Figure 1.9: Fuse Bits}}

Figure 1.9: Fuse Bits

Under Program, tick the boxes Erase divide before flash programming and Ver-
ify device after programing. Select the USB_CAN.hex as input hex file for flash
programming

{{  :en:hardware:arm-can:insthex2.jpg  |Figure 1.10: Programming}}

Figure 1.10: Programming