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Topic: MAX7456 OSD Shield (Read 2186 times) previous topic - next topic

TonyD

Nov 22, 2011, 04:05 pm Last Edit: Nov 22, 2011, 04:07 pm by TonyD Reason: 1
Here's a beta release of a On Screen Display (OSD) shield I've been working on, it still needs a bit tiding up.

It uses a MAX7456 from Maxim for the video overlay function. The MAX7456 is connected to the Ardunio's SPI port (MOSI, MISO and SCK) and a double row of 0.1 headers can be used to choose which digital pin drives chip select (CS) for the MAX7456.

In addition to the MAX7456 OSD chip, there's also a DS1307 Real Time Clock (RTC) with battery backup for displaying time and date to video feed.

I designed it using DesignSpark PCB, pulling in the MAX7456 footprint from the Sparkfun PCB library. I'll post design files and gerbers shortly.

For software, I used code from forum members dfraser and zitron in this forum post.


kg4wsv

Quote
For software, I used code from forum members dfraser and zitron


That library has been updated a few times, including a recent update that allows you to use the 7456 out of the box - no character set re-flash required.

-j


TonyD

Thanks J, I'll checkout the update software

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