oPossum 1,083 Posted April 1, 2012 Share Posted April 1, 2012 The latest rev 1.5 Launchpad comes with a G2553 chip that has enough RAM and Flash to do a 24 x 16 text display using NTSC or PAL video. There is enough flash for a 8x12 font and SPI is used to offload video generation so the MPU has time to do font data lookup. The sync generation is the same as used on the older chips. The Fraunchpad can do video, but there are some problems. The FRAM speed is only 8 MHz, so caching is used to allow the MPU to run at up to 24 MHz. The cache misses that occur make video generation a challenge. It can be made to work as the demo video shows, but other F5000 series chips would be a better choice. Here is a demo of the code that is using the Launchpad as a simple video terminal to show closed caption data. The decoded closed caption data is sent from the decoder to both the Launchpad and the computer's serial port. Top right is Hyperterminal showing the closed caption data, below that is picture-in-picture of the NTSC video from the Launchpad, to the left is VLC showing the live video. Here is a demo of the Fraunchpad showing MIDI data in one of three selectable formats. The Fraunchpad has more RAM, so the text resolution is 32 x 16. video_text.zip dacoffey, zborgerd and bluehash 3 Quote Link to post Share on other sites
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