AVR1014
13
8296A-AVR-03/10
3.3 Interfacing MC303 with PC through USB
Commands & status can be transferred to a PC through a USB link thanks to the USB
bridge on the MC303.
3.3.1 Connection
Connect the USB mini B cable to the MC303 board and to a PC. Make sure J11
(power supply of USB bridge) is properly configured.
3.3.2 Communication
MC303 USB interface uses USB CDC class for communication. As the Atmel Motor
Control Center software uses the RS232 interface, CDC class fits perfectly with the
needs of this software. MC303 is delivered with a native USB CDC firmware in the
AT90USB1287.
3.3.3 USB bridge update
MC303 USB bridge can be updated thanks to the Atmel Bootloader in the
AT90USB1287. Press Program Push button then Reset the USB device by pressing
the Reset Push button. AT90USB1278 will then enumerate in DFU class (Device
Firmware Upgrade class). See Atmel FLIP user’s guide for upgrading the
AT90USB1287 device on Atmel web site:
Figure 3-1.
Entering in bootloader or start the application.
Push button to enter
into USB bootloader.
