2 docs tagged with "tutorial"

Blinking an LED from an Arduino sketch takes two lines and teaches nothing about the machine. Blinking one with no HAL, no IDE and no library takes about ninety lines spread over five files, and by the end you know where every byte of the image came from, what the processor did before your first instruction, and which two writes in the whole program actually made the light change.

Every CUDA program, no matter how large, is built from the same five moves: allocate device memory, copy input in, launch a kernel, copy output back, free what was allocated. SAXPY — y = a*x + y, scalar-times-vector-plus-vector — is small enough to show all five in one file without anything else getting in the way. The rest of this page walks the same file section by section.