[ts-7000] write to ts7800 frame buffer

["allamack17" <>]

I want to write a camera image to the ts7800 frame buffer.  I have the
data stored in an unsigned char * array.  I opened /dev/fb0, I used
mmap to map it to memory and then I used memcpy to write the data. 
Should that work as long as I know the correct size of my data array?
 I guessed at the size right now and its not working correctly
(displays garbage).  I know the number of pixels of the image and the
bands but mmap fails if I set the size to sizeof(unsigned char) *
width * height * bands.  I guess because its too large?  Any ideas on
how I to properly display the image?  Thanks.


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