TftRgbFromSdRaw()

TftRgbFromSdRaw(wX_Pos As Word, wY_Pos As Word, wRgbWidth As Word, wRgbHeight As Word, dwStartSector As Dword, dwStopSector As Dword, wFrameDelayUs As Word), Byte

wRgbWidth = Movie width

wRgbHeight = Movie height

dwStartSector = File start sector on the SD card

dwStopSector = File end sector on the SD card

wFrameDelayUs = Delay in microseconds between frames to adjust the frame rate

Result Byte:

255 = No errors detected

Else = Errors detected

This procedure plays an RGB movie file directly from an SD card, where the movie is stored sequentially without a file system.

Example:

TftRgbFromSdRaw(80,40,320,240, 3243300,4153799,10)

Playing a movie in RAW pixel mode (sequences of pixel values) is computationally demanding. Only small video formats with high-speed dsPICs can display the video smoothly. A dsPIC running at 140 MHz will struggle with a video size of 320x240. Note that there is no VSYNC option available.

The wFrameDelayUs parameter allows for frame rate adjustment by introducing a delay between frames. For smaller video formats on faster microcontrollers where playback may appear too fast, start with 0 for no delay, and add delay if the video is playing too quickly.

Video conversion and upload to SD cards is handled by the included SdCardWriteRGB565 tool.

Note: If wonder, what would be the fastest display hardware set-up? SPI1-to-SPI2 is a bit faster than SPI1-to-PARALLEL when it comes to video display from RAW SD card.

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