|
Problem |
Cause |
Solution |
|---|---|---|
|
Nothing is displayed on the LCD |
The LCD module isnot enabled in the AVR device |
Check the LCD initialization
|
|
Nothing is displayed on the LCD |
The update frequency is not correct |
Verify that the clock prescaling corresponds with the clock-source |
|
Nothing is displayed on the LCD |
The battery is dead |
|
|
Some segments on the LCD seems do disappear |
Your fingers are touching the LCD pins or PORTD |
Hold the AVR Butterfly on the edge of the PCB, without touching the LCD pins. |
|
Serial programming does not work |
ISP cable not connected properly to the ISP footprint |
Connect the ISP cable according to Programming |
|
Serial programming does not work |
STK500 target voltage error |
Refer to the ATmega169 datasheet for for the Serial Programming Voltage limits. Adjust the target voltage on the STK500 accordingly. |
|
Parallel programming does not work |
Cables not connected properly |
Refer to Figure 4 for correct parallel programming set-up. |
|
Parallel programming does not work |
STK500 target voltage error |
Refer to the ATmega169 datasheet for for the Serial Programming Voltage limits. Adjust the target voltage on the STK500 accordingly. |
See the Application Note AVR065 LCD driver for the STK502 LCD on how to control the LCD-display, or the Application Note AVR064 STK502 A temperature monitoring system with LCD output Or program the application that comes with the AVR Butterfly.