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F21 in a Mouse
Tiny GUI Demo I took an old computer mouse and removed the circuit board that used a common garden variety 68HC05 microcontroller. I replaced the microcontroller with a small F21d test board.
The code consists of an arrow sprite, graphics bit block transfer, and a simple event handler. These are functions that can be easily offloaded to the video coprocessor on F21 so that they become extremely fast and are very simple to do from the point of view of the CPU. This is partly because when generting high resolution video out of DRAM with no SRAM on the card the memory bandwidth is very limited.
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