User guide

Atmel AVR2054

8390B-AVR-12/11

4.1.2 Programming a device

To program a wireless device using serial bootloader the following steps shall be

done:

1. Connect a device with the embedded bootloader firmware on it to a PC via serial

connection. For detail refer to documentation of the development kit or the

software provided with it.

2. For the GUI version of serial bootloader run the application by double-clicking the

bootloadergui.exe file. For the console version just start command line from the

Bootloader PC tool installation directory (see Section 4.1.3 for more detail).

Specify uploading parameters.

a. Select the connection type. For all devices except Atmel SAM3S

select

Serial, while for SAM3S select USB.

b. Select the port from the list.

NOTE There is a restriction on the size of firmware downloadable by serial booting process.

Serial bootloader cannot rewrite the area where the bootstrap code resides.

4. Press the

Upload button if Bootloader PC GUI tool is used. For the console

bootloader press

Enter on the keyboard to start uploading.

5. Press the HW reset button on the device if requested. The Bootloader PC tool will

be waiting for approximately 30 seconds for the button to be released. If this does

not happen, programming will be aborted.

6. The Bootloader PC tool will indicate the programming progress. Once loading is

finished successfully, the device will be restarted automatically. If loading fails, the

Bootloader PC tool will indicate the reason. In case the new image upload fails (for

example, because of random communication errors) the device should be re-

programmed. It the reprogramming does not resolve the issue then the previously

programmed code image in the device may be corrupted. The device should be

erased and reprogrammed via JTAG.