This repo is similar to pico-examples but utilizing additional libraries
from pico-extras
Note that most of these examples are neither fleshed out nor well documented. They mostly serve
the purpose of playing with/testing particular areas of functionality (mostly audio/video related)
Finally, you may wonder why many of these demos set the system clock to 48Mhz. The reason is that until we had physical
chips, we were running at a fixed 48Mhz system clock on FPGA. Most of these examples were written before the
RP2040 design was final and as such were all run against FPGA. As a result some of the examples do things in a way
that you wouldn't necessarily need to if you had more clock speed available (which you do), but on the plus side,
you have that much more time to do even more things!
Full Applications
Name |
Description |
popcorn |
This is a movie player for 30fps 320x240 movies with 44100 stereo sound, read in a custom format from SD card... it can even play backwards :-) TODO: add a link to big buck bunny in the right format TODO: add converter |
usb_sound_card |
A no frills but functional USB sound card... hooked up via our old (pre TinyUSB) USB device stack. Keeping it around as it works nicely! |
Audio
Scanout Video
In scanout video, every pixel is driven by the PIO every frame, and a framebuffer is not (necessarily) used (which
is useful when you only have 264K of RAM).
Name |
Description |
demo1 |
So named because it was the first demo program written that used video.. it is a bit dated now and hails from a time where there was much less RAM on the RP2040 |
flash_stream |
Streams video data out of flash fast enough to drive 640x480x60fps bitmap display |
hscroll_dma_tiles |
A horizontal scrolling test app which uses a second video plane (PIO) to overlay sprites |
mandelbrot |
A mandelbrot generator using a 320x240x16 framebuffer |
mario_tiles |
Confusingly named as a reference to Super Mario Kart's tiled psuedo-3D rendering. This is similar to hscroll_dma_tiles except the whole tiled scrolling area is now rotated and zoomed. |
scanvideo_minimal |
A very basic video output generator which generates a test pattern |
render |
A very dated rendering library used by demo1 - avoid! |
sprite |
A small sprite library used by sprite_demo |
sprite_demo |
Some bouncing Eben heads |
textmode |
Shows off chained DMA to generate scanlines out of glyph fragments via DMA/PIO |
Sleep
Examples of using low power mode; these use pico_sleep
from pico_extras which is not yet stable.
Stdio
Examples of adding additional stdio support. Note the interface for stdio drivers is not yet considered stable
even though it is in the Pico SDK
Name |
Description |
stdio_pio |
Demonstrates adding a custom STDIO driver using a PIO UART |
Networking