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AVR414
5.2 Programming the ATmega1281
The precompiled firmware used in the following subsection can be found in the “bin”
folder of the .zip file accompanying this document.
1. Connect a serial cable to the connector marked RS232CTRL on the STK500 to a
COM port on the PC.
2. Apply power to the STK500 by moving the power switch toward the edge of the
board.
3. Start AVR Studio and press the “Cancel” button in the Welcome dialog window.
4. From the Tools menu, select “Program AVR” and “Connect…”.
5. Select STK500 or AVRISP as platform and then press “Connect…”. Verify that a
dialog named “STK500 with STK501 top module” appears.
6. Open the “Program” tab. Select ATmega1281 from the Device pull down menu.
7. Select the “Fuses” tab and ensure that the Fuses are set as listed in Table 5-1:
Table 5-1. ATmega1281 Fuse Settings
Fuse Name
Brown-out detection disabled
Preserve EEPROM
Boot Flash section size=4096 words
Divide clock by 8 internally
Int. RC Osc.;Start-up time: 6CK + 65 ms
Setting
Checked
Checked
Checked
Not Checked
Checked
Comment
This way the user only needs to
program the EEPROM once.
Will divide the clock by 8. This
will corrupt the MAC execution.
8. Go back to the “Program” tab. Program the flash of the ATmega1281 with the
“bin\AVR414_evaluation_application.hex” file found in the “bin” folder.
9. Program the EEPROM of the ATmega1281 with the .hex file generated in
subsection 5.1.
10.Close the STK500 window.
6 Running the Evaluation Application
As mentioned in the introduction of this document an evaluation application is
available as a part of this application note. This is a peer-to-peer chat application,
where two RZ502 top modules are used to send messages back and forth. Figure 6-1
gives an overview of the evaluation application and its components from a system
point of view. The reminder of this section describes two different ways to interface
with the evaluation application.
11
8051A-AVR-11/06
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