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Topic: Display Bitmap (Read 1 time) previous topic - next topic


I'm trying to display a bitmap on a serial LCD (http://www.sparkfun.com/commerce/product_info.php?products_id=8358) and am having some problems. I'm an arduino newbie, so any help or advice would be appreciated. hopefully I'm doing something really dumb and easy to correct!

when I upload my code to the board, it corrupts the bootloader and I have to burn the bootloader again and start over (see problems here - http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1204684257). burning a new bootloader gets me up and running again.

here is the output when I try and upload the program to the board:

here is the function I'm using to try and display the bitmap:

and here is the documentation for the LCD:

per the documentation, I'm sending [200][6][200] followed by 1024 bytes of bitmap data.



power the LCD from a separate power supply

if you power the backlighting LEDs from arduino the voltage drops too much and the processor goes crazy



thanks for the reply.

would the voltage drop only affect the processor when running certain programs? I'm able to display text (multiple lines) and graphics (rectangles, etc) but the arduino only goes nuts when I try and send the bitmap. it also has the same problem when I try and upload the file without the LCD attached.

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