NTSC video with LPC1768





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Uploaded on Jul 2, 2011

NTSC Color Video is generated with LPC1768 and a few discrete components. RGB to NTSC ASIC such as AD725 is NOT used.

Resolution : 256x240 @ 8bpp with all 256 colors on screen.
Here, the image is organized as 32x30 tiles with
4-way smooth scrolling and maximum of 256 sprites per screen and max 32 sprites per line.

Color is generated by (ab)using PWM. GPIO ports are used for putting out pixel data with a 4 bit R-2R DAC for LUMA.

Audio - 8 bit PCM stereo at 15.734 kHz
The song is read from a stereo WAV file in the SD card.
LPC1768 also handles this and D-A conversion is done by (ab)using MCPWM.

Visit: http://gvworks.blogspot.com/
and http://msys-mv.blogspot.com/


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