2015-04-08 05:50:01 +00:00
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# arduino-vga
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2015-04-08 07:12:07 +00:00
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Generating VGA video with an Arduino Uno / Atmega16u2 Microcontroller.
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**To Connect (atmega16u2):**
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2015-04-08 07:24:07 +00:00
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* Connect all grounds on the VGA connector together.
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* Connect VGA ground to the Arduino Gnd.
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* Place a 120ohm resistor from the MOSI2 pin (Pin 4 on ICSP) to PB7 (Pin 4 on JP2)
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* Connect the VGA red, blue and green inputs together and connect to PB7.
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* Connect VGA vsync to PB5 (Pin 3 on JP2).
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* Connect VGA hsync to PB4 (Pin 1 on JP2).
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2015-04-08 07:12:07 +00:00
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**To Assemble:**
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2015-04-08 07:24:07 +00:00
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* avr-as -mmcu=atmega16u2 -o ghettovga.o ghettovga.s
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* avr-ld -m avr35 -o ghettovga.bin ghettovga.o
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* avr-objcopy -j .text -j .data -O ihex ghettovga.bin vghettovga.hex
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2015-04-08 07:12:07 +00:00
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**To Upload:**
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2015-04-08 07:24:07 +00:00
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* Temporarily short pins 5 and 6 on the atmega16u2 ICSP header.
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* dfu-programmer atmega16u2 erase
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* dfu-programmer atmega16u2 flash "./ghettovga.hex"
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* dfu-programmer atmega16u2 reset
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2015-04-08 07:12:07 +00:00
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**To Restore Arduino Bootloader**
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2015-04-08 07:24:07 +00:00
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* Temporarily short pins 5 and 6 on the atmega16u2 ICSP header.
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* Retrieve the appropriate usb-serial hex from: http://bit.ly/1E3pMbU
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* Use dfu-programmer to flash hex to atmega16u2
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2015-04-08 07:12:07 +00:00
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Font glyphs copyright (c) 1981 Michael C. Koss http://mckoss.com/jscript/tinyalice.htm
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