Search Results for "run length encoding"

This sketch makes the Arduino work as a GPIO interface for a computer, where input and output changes are transmitted in run-length encoding. Every time an input pin changes, the Arduino sends the new values of the input pins and the time since the last change. In a similar way, the Arduino can be programmed a sequence of output pin changes, each specified by the new values of the output pins and the time since the previous change. Three application programs are included: the first makes two digital pins act as a TTL-levels UART; the seconds turns the value of the input pins into an image; the third reads codes from infrared remotes with a photodiode and a resistor connected to one of the input pins.

Encode bitmap(bmp) file with run-length encoding(RLE), just like RLE4 and RLE8, but extend to RLE16, RLE24 and RLE32. Usually, this project will be used in GUI of embedded system, to make the image files smaller, and save the IO bandwith. If the GUI support JPG or PNG, the compression ratio is much better than RLE, but how about the embedded system encounters both caculate limitation and IO bandwidth limitation?