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1  Using Arduino / LEDs and Multiplexing / 8x8 and 32x8 dot matrix font/image code generator link on: June 27, 2011, 05:31:37 pm
I needed to generate custom font codes as well as some custom image codes for my current 40x8 dot matrix display driven via 74HC595 shift registers and CD4017 counter chips with Arduino. So I came up with this web based code generator. You can click on each segment to turn it on or off and the page will generate the code in arduino compatible binary array. I thought it might be useful for others too.

http://pial.net/page/tools.aspx

Enjoy!
2  Forum 2005-2010 (read only) / Troubleshooting / Re: With FT232BM crystal oscillator is required/op on: June 13, 2008, 05:58:31 pm
Thanks for the information spiffed.  smiley
3  Forum 2005-2010 (read only) / Troubleshooting / With FT232BM crystal oscillator is required/option on: June 12, 2008, 04:40:12 pm
Does anybody know if the FT232BM usb to serial converter chip requires the 6Mhz crystal oscillator to be connected or it can work without an external oscillator? I made one without the external oscillator and I am getting "the usb device malfunctioned" when connected to the usb port. Anyone else had this problem? How to solve it.

Thanks in advance.
4  Forum 2005-2010 (read only) / Troubleshooting / Re: Problem uploading sketch to board on: June 12, 2008, 05:34:43 pm
I also had the same problem when I started, but I was using the MAX232 serial converter. In my case it was the crystal oscillator not being at 16Mhz on the arduino board. After I connected a 16Mhz crystal on the arduino board (I made the  freeduino max serial board from http://www.freeduino.org/freeduino_open_designs.html) everything worked fine. I have the serial port baudrate set at 9600 set for both my serial and serial-to-usb arduino boards and the sketches upload fine on both. You might want to check your USB to serial converter cable for problems.
5  Forum 2005-2010 (read only) / Troubleshooting / Re: Trouble uploading sketch to serial arduino boa on: May 13, 2008, 07:03:53 pm
Quote
Does the crystal has to be 16Mhz exact or 12MHz or 20Mhz would also work?
The crystal must be 16MHz. Otherwise you'll need to recompile the boot loader. If you don't have 16MHz crystals or resonators on hand, you can use the onboard RC clock (@8MHz) and the lilypad boot-loader.[/quote]

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Thanks for your help. I tried to upload the lilypad bootloader but stk500 errored out saying, it was too big to fit on the Atmega8?!! I can recompile the Atmega8 boot loader. Please advice what changes should be made in the code to use a 12MHz crystal. Or even modifly the Atmega bootloader to use internal clock.

Thanks.
6  Forum 2005-2010 (read only) / Troubleshooting / Trouble uploading sketch to serial arduino board on: May 13, 2008, 01:46:43 am
Hi,
I made a Diecimila compatible board following the circuit diagram at http://www.freeduino.org/freeduino_open_designs.html  (Freeduino MaxSerial board). I used my atmel stk500 to load the bootloader (ATmegaBOOT.hex from arduino folder). However I didn't do any lock bit/fuse changes. Is that necessary? If so, wich lock bits and/or fuse bits need to be changed and with what values? When I turned on the board, the led on pin 13 blinked for a while and stopped. When I tried to upload a sketch, the LED blinked again but I got the following error:

avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

My OS is: Windows Vista 32bit

Can anyone please help? Does the crystal has to be 16Mhz exact or 12MHz or 20Mhz would also work?

Thanks in advance.
7  Forum 2005-2010 (read only) / Interfacing / Re: Interfacing VS1002 mp3 decoder chip with arduino? on: May 10, 2010, 07:40:43 pm
Thank you KyleK!
8  Forum 2005-2010 (read only) / Interfacing / Interfacing VS1002 mp3 decoder chip with arduino? on: May 04, 2010, 05:14:29 pm
Just wondering if anyone has ever worked with interfacing the VLSI VS1002 mp3 decoder chip with arduino or came accross such resources on the web.

Thanks.
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