98 lines
3.0 KiB
Arduino
98 lines
3.0 KiB
Arduino
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// NeoPixelBuffer
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// This example will animate pixels using a bitmap stored on a SD card
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//
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//
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// This will demonstrate the use of the NeoBitmapFile object
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// NOTE: The images provided in the example directory should be copied to
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// the root of the SD card so the below code will find it.
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// NOTE: This sample and the included images were built for a 144 pixel strip so
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// running this with a smaller string may not look as interesting. Try providing
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// your own 24 bit bitmap for better results.
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#include <NeoPixelBus.h>
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#include <NeoPixelAnimator.h>
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#include <SPI.h>
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#include <SD.h>
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const int chipSelect = D8; // make sure to set this to your SD carder reader CS
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//typedef NeoGrbFeature MyPixelColorFeature;
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typedef NeoGrbwFeature MyPixelColorFeature;
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const uint16_t PixelCount = 144; // the sample images are meant for 144 pixels
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const uint16_t PixelPin = 2;
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const uint16_t AnimCount = 1; // we only need one
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NeoPixelBus<MyPixelColorFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
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// for esp8266 omit the pin
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//NeoPixelBus<MyPixelColorFeature, Neo800KbpsMethod> strip(PixelCount);
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NeoPixelAnimator animations(AnimCount); // NeoPixel animation management object
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// our NeoBitmapFile will use the same color feature as NeoPixelBus and
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// we want it to use the SD File object
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NeoBitmapFile<MyPixelColorFeature, File> image;
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uint16_t animState;
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void LoopAnimUpdate(const AnimationParam& param)
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{
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// wait for this animation to complete,
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// we are using it as a timer of sorts
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if (param.state == AnimationState_Completed)
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{
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// done, time to restart this position tracking animation/timer
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animations.RestartAnimation(param.index);
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// draw the complete row at animState to the complete strip
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image.Blt(strip, 0, 0, animState, image.Width());
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animState = (animState + 1) % image.Height(); // increment and wrap
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}
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}
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void setup() {
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Serial.begin(115200);
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while (!Serial); // wait for serial attach
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strip.Begin();
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strip.Show();
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Serial.print("Initializing SD card...");
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// see if the card is present and can be initialized:
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if (!SD.begin(chipSelect))
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{
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Serial.println("Card failed, or not present");
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// don't do anything more:
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return;
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}
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Serial.println("card initialized.");
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// open the file
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File bitmapFile = SD.open("strings.bmp");
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if (!bitmapFile)
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{
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Serial.println("File open fail, or not present");
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// don't do anything more:
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return;
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}
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// initialize the image with the file
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if (!image.Begin(bitmapFile))
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{
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Serial.println("File format fail, not a supported bitmap");
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// don't do anything more:
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return;
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}
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animState = 0;
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// we use the index 0 animation to time how often we rotate all the pixels
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animations.StartAnimation(0, 30, LoopAnimUpdate);
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}
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void loop() {
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// this is all that is needed to keep it running
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// and avoiding using delay() is always a good thing for
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// any timing related routines
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animations.UpdateAnimations();
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strip.Show();
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}
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