Atmel AVR1921 Instructions d'installation et d'utilisation

AVR1921: Reprogramming the Xplain

AT90USB1287 and ATxmega128A1 firmware

Features

• ATxmega128A1 microcontroller

• External Memory

- 8MB SDRAM

- 8MB Serial Data Flash

• AT90USB1287

- Communication gateway

- Programmer for Atmel®AVR®XMEGATM

- Analog Input (to ADC)

- Temperature sensor

- Potentiometer

• Analog Output (from DAC)

- Mono speaker via audio amplifier

• Digital IO

- UART communication through USB gateway

- 8 micro switch buttons

- 8 LEDs

- 8 spare analog pins

- 8 spare digital pins

1 Introduction

This application note describes how to reprogram the AT90USB1287 and the

ATxmega128A1 on the Xplain board with the original firmware, or your own

application code.

Figure 1-1. Xplain evaluation kit.

8-bit

Microcontrollers

Application Note

Rev. 8301A-AVR-04/10

2 AVR1921 8301A-AVR-04/10

2 Reprogramming the firmware

2.1 Powering the Xplain board

Power the Xplain kit by connecting it to a PC host or a USB power adapter. The

Xplain USB connector is the mini-B type used for most portable products today.

Figure 2-1. Xplain connectors

If connecting the Xplain kit to a PC, you might be required to install the Xplain USB

driver the first time it is connected. Please find the install file in the /software/USB

driver/ folder of the zip file distributed with this application note

(0http://www.atmel.com/avr/). Select the driver corresponding to the

Xplain/AT90USB1287 firmware revision used. You will find the revision ID on the

back side of the Xplain as shown in Figure 2.2b. It is possible to replace the

AT90USB1287 firmware of a revision 1 kit with later firmware, in that case it is

required to uninstall the USB driver and install the new driver.

AVR1921

8301A-AVR-04/10

Figure 2-2a. Xplain revision

Figure 2-2b. Xplain revision

4 AVR1921 8301A-AVR-04/10

2.2 Using the preprogrammed firmware

The preprogrammed firmware in the ATxmega128A1 runs a demo application where

sounds/tunes are played when the buttons are pushed.

The preprogrammed firmware of the AT90USB1287 is composed of two distinct

sections: the bootloader and the application.

The bootloader provides a simple way for the user to update the application section of

the AT90USB1287 with the only need of FLIP (a free PC application) and a USB

cable.

The preprogrammed application is a USB to serial port bridge. When the USB is

connected to a PC host and correctly enumerated, the AT90USB1287 will operate as

a communication gateway, and pass on data between the UART and the USB (COM

port). When powered from a USB power adapter (and therefore not enumerated) the

AT90USB1287 will echo back data received on the UART.

2.3 Reprogramming the ATxmega128A1 firmware using JTAGICE mkII

This guide requires that AVR Studio 4 is installed. It is a walkthrough which describes

how to download the original firmware using a JTAGICE mkII with AVR Studio 4.18.

1. Make sure the Xplain board is powered (please refer to the “52.1 6Powering the

Xplain board” section).

2. Connect the JTAGICE mkII to the “JTAG & PDI XMEGA” pin header (J100)

as shown in figure 2.1.

3. Open the programming dialog in AVR Studio selecting Tools -> Program AVR

-> Connect. Select “JTAGICE mkII” and Auto and click “Connect”.

4. Select the “Main” tab and choose the “ATxmega128A1” from the dropdown

list. Choose “JTAG mode” as programming mode.

5. Select the “Program” tab and choose the XMEGA hex file provided with the

application note as Flash input hex file

(/firmware/revision_XXX/ATxmega128A1/ATxmega128A1.hex). Click

Program.

The device is now programmed original firmware. The same procedure can be used

to download your own application code.

2.4 Reprogramming the AT90USB1287 firmware using JTAGICE mkII

This guide requires that AVR Studio is installed. It is a walkthrough which describes

how to download the bootloader, the application as well as setting the correct fuse

settings. The firmware is downloaded with the JTAGICE mkII and AVR Studio 4.18.

Downloading the firmware:

1. Make sure the Xplain board is powered (please refer to the “72.1 8Powering the

Xplain board” section).

2. Connect the JTAGICE mkII to the “JTAG USB” pin header (J200) as shown in

figure 2.1.

3. Open the programming dialog in AVR Studio selecting Tools -> Program AVR

-> Connect. Select “JTAGICE mkII” and Auto and click “Connect”.

AVR1921

8301A-AVR-04/10

4. Select the “Main” tab and choose the “AT90USB1287” from the dropdown list.

Choose “JTAG mode” as programming mode.

5. Select the “Program” tab and choose the USB bootloader hex file provided

with the application note as Flash input hex file

(/firmware/revision_XXX/AT90USB1287/ AT90USB1287.hex). Click Program.

6. Select the “Fuses” tab in the programming dialog. The fuses should be set as

shown below. (Ext 0xFB, High 0x98, Low 0xDE)

Figure 2-2. USB fuse settings

2.5 Reprogramming the AT90USB1287 application firmware using FLIP

This guide requires that both AVR Studio®and FLIP are installed. It is a walkthrough

which describes how to download the USB application firmware. To use FLIP as a

stand alone application, please refer to the application note: “AVR282: USB Firmware

Upgrade for AT90USB”.

1. Disconnect the USB power source.

2. Unplug the JTAGICE mkII and place a jumper between pins 1 and 2 on the

“JTAG USB” pin header (J200).

3. Connect the USB cable to a computer.

4. The first time this is done, the bootloader driver will have to be installed. A

“Found new hardware wizard” will pop up. Select “No, not this time” and next

as shown bellow.

6 AVR1921 8301A-AVR-04/10

Figure 2-3. Found new hardware

5. Select “Install from a list or specific location (Advanced). Click next.

6. Select “Include this location in the search:”. Select the FLIP installation folder

and the usb folder as shown bellow. Click next.

Figure 2-4. Driver path selection

7. Click finish.

8. Open AVR Studio and select Tools -> Flip X.X.X.

9. Select Device -> Select... -> AT90USB1287 and click “OK”

10. Select Settings -> Communication -> USB and click “Open”.

11. Under “Operations Flow” check out “Erase, “Program” and “Verify”.

12. Choose the hex file to be programmed: select File -> Load hex file. Choose

the USB application firmware file (/firmware/revision_XXX/AT90USB1287/

Xplain_USB.a90) and click “OK”.

13. Press “Run”.

AVR1921

8301A-AVR-04/10

The device is now programmed with the serial gateway application firmware. The

same procedure can be used to download your own application code. Remove the

jumper at the “JTAG USB” pin header (J200) and cycle power to start the application

code.

8301A-AVR-04/10

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