alkama wrote:Yes i do everything from section 'Programming Megadrum bootloader' from website.
Try updating the firmware via MIDI-OX or Dmitri's update tool.
LCD problem
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Re: LCD problem
by Firelord » Sun Apr 11, 2010 10:11 pm
Try updating the firmware via MIDI-OX or Dmitri's update tool.
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Re: LCD problem
by alkama » Sun Apr 11, 2010 10:17 pm
I will try, but are you sure that is not LCD problem?
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Re: LCD problem
by Firelord » Sun Apr 11, 2010 10:50 pm
alkama wrote:I will try, but are you sure that is not LCD problem?
In order to update the firmware (with the bootloader in place) you need to boot MegaDrum with the left key pressed. You should see the bootloader menu on screen. Also the MIDI activity LED should flash repeatedly. If none of this is happening during boot-up with left key pressed, then there is some problem with ATMega/its firmware. If you see blinking LED but there is no text on the LCD, then there is some problem with the LCD and/or with the connection between ATMega→LCD.
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Re: LCD problem
by alkama » Mon Apr 12, 2010 5:15 pm
I updated Megadrum with left key pressed and LED flash repeatedly, but it's nothing on LCD, during and after updating.
And all connections between Amtega and LCD are correct.
I checked the voltage values on my LCD. LCD is highlighted. The voltage between pin 15 and 16 is 4V, voltage between pin 1 and 2 is 0V and voltage between pin 1 and 3 is 0V. All connections with PCB are ok, and values of elements too.
And all connections between Amtega and LCD are correct.
I checked the voltage values on my LCD. LCD is highlighted. The voltage between pin 15 and 16 is 4V, voltage between pin 1 and 2 is 0V and voltage between pin 1 and 3 is 0V. All connections with PCB are ok, and values of elements too.
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Re: LCD problem
by Firelord » Mon Apr 12, 2010 7:30 pm
Which ATMega model are you using? What crystal clocks ATMega?
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Re: LCD problem
by dmitri » Mon Apr 12, 2010 7:53 pm
alkama wrote:I updated Megadrum with left key pressed and LED flash repeatedly, but it's nothing on LCD, during and after updating.
And all connections between Amtega and LCD are correct.
I checked the voltage values on my LCD. LCD is highlighted. The voltage between pin 15 and 16 is 4V, voltage between pin 1 and 2 is 0V
And according to viewtopic.php?f=3&t=352 what voltage there should be?
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Re: LCD problem
by alkama » Mon Apr 12, 2010 8:05 pm
I know there should be 5V, but ago i had 5V and also it was that same.
And connections are ok.
And connections are ok.
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Re: LCD problem
by dmitri » Mon Apr 12, 2010 8:30 pm
alkama wrote:I know there should be 5V, but ago i had 5V and also it was that same.
With this approach you won't solve your problems. It is either 5V there or not now.
And connections are ok.
If there is no 5V there connections are definitely not ok.
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Re: LCD problem
by Firelord » Mon Apr 12, 2010 8:37 pm
I second that. If there is 0V between pins 1 and 2 then there is a problem either in the connecting cables or on the board.dmitri wrote:If there is no 5V there connections are definitely not ok.
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