/* OctoWS2811 VideoSDcard.ino - Video on LEDs, played from SD Card http://www.pjrc.com/teensy/td_libs_OctoWS2811.html Copyright (c) 2014 Paul Stoffregen, PJRC.COM, LLC Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Update: The programs to prepare the SD card video file have moved to "extras" https://github.com/PaulStoffregen/OctoWS2811/tree/master/extras The recommended hardware for SD card playing is: Teensy 3.1: http://www.pjrc.com/store/teensy31.html Octo28 Apaptor: http://www.pjrc.com/store/octo28_adaptor.html SD Adaptor: http://www.pjrc.com/store/wiz820_sd_adaptor.html Long Pins: http://www.digikey.com/product-search/en?keywords=S1082E-36-ND See the included "hardware.jpg" image for suggested pin connections, with 2 cuts and 1 solder bridge needed for the SD card pin 3 chip select. Required Connections -------------------- pin 2: LED Strip #1 OctoWS2811 drives 8 LED Strips. pin 14: LED strip #2 All 8 are the same length. pin 7: LED strip #3 pin 8: LED strip #4 A 100 to 220 ohm resistor should used pin 6: LED strip #5 between each Teensy pin and the pin 20: LED strip #6 wire to the LED strip, to minimize pin 21: LED strip #7 high frequency ringining & noise. pin 5: LED strip #8 pin 15 & 16 - Connect together, but do not use pin 4: Do not use pin 3: SD Card, CS pin 11: SD Card, MOSI pin 12: SD Card, MISO pin 13: SD Card, SCLK */ #include #include #include #include #include #define LED_WIDTH 60 // number of LEDs horizontally #define LED_HEIGHT 32 // number of LEDs vertically (must be multiple of 8) #define FILENAME "VIDEO.BIN" const int ledsPerStrip = LED_WIDTH * LED_HEIGHT / 8; DMAMEM int displayMemory[ledsPerStrip*6]; int drawingMemory[ledsPerStrip*6]; elapsedMicros elapsedSinceLastFrame = 0; bool playing = false; OctoWS2811 leds(ledsPerStrip, displayMemory, drawingMemory, WS2811_800kHz); File videofile; AudioPlayQueue audio; AudioOutputAnalog dac; AudioConnection patchCord1(audio, dac); void setup() { AudioMemory(40); //while (!Serial) ; delay(50); Serial.println("VideoSDcard"); leds.begin(); leds.show(); if (!SD.begin(3)) stopWithErrorMessage("Could not access SD card"); Serial.println("SD card ok"); videofile = SD.open(FILENAME, FILE_READ); if (!videofile) stopWithErrorMessage("Could not read " FILENAME); Serial.println("File opened"); playing = true; elapsedSinceLastFrame = 0; } // read from the SD card, true=ok, false=unable to read // the SD library is much faster if all reads are 512 bytes // this function lets us easily read any size, but always // requests data from the SD library in 512 byte blocks. // bool sd_card_read(void *ptr, unsigned int len) { static unsigned char buffer[512]; static unsigned int bufpos = 0; static unsigned int buflen = 0; unsigned char *dest = (unsigned char *)ptr; unsigned int n; while (len > 0) { if (buflen == 0) { n = videofile.read(buffer, 512); if (n == 0) return false; buflen = n; bufpos = 0; } unsigned int n = buflen; if (n > len) n = len; memcpy(dest, buffer + bufpos, n); dest += n; bufpos += n; buflen -= n; len -= n; } return true; } // skip past data from the SD card void sd_card_skip(unsigned int len) { unsigned char buf[256]; while (len > 0) { unsigned int n = len; if (n > sizeof(buf)) n = sizeof(buf); sd_card_read(buf, n); len -= n; } } void loop() { unsigned char header[5]; if (playing) { if (sd_card_read(header, 5)) { if (header[0] == '*') { // found an image frame unsigned int size = (header[1] | (header[2] << 8)) * 3; unsigned int usec = header[3] | (header[4] << 8); unsigned int readsize = size; // Serial.printf("v: %u %u", size, usec); if (readsize > sizeof(drawingMemory)) { readsize = sizeof(drawingMemory); } if (sd_card_read(drawingMemory, readsize)) { // Serial.printf(", us = %u", (unsigned int)elapsedSinceLastFrame); // Serial.println(); while (elapsedSinceLastFrame < usec) ; // wait elapsedSinceLastFrame -= usec; leds.show(); } else { error("unable to read video frame data"); return; } if (readsize < size) { sd_card_skip(size - readsize); } } else if (header[0] == '%') { // found a chunk of audio data unsigned int size = (header[1] | (header[2] << 8)) * 2; // Serial.printf("a: %u", size); // Serial.println(); while (size > 0) { unsigned int len = size; if (len > 256) len = 256; int16_t *p = audio.getBuffer(); if (!sd_card_read(p, len)) { error("unable to read audio frame data"); return; } if (len < 256) { for (int i=len; i < 256; i++) { *((char *)p + i) = 0; // fill rest of buffer with zero } } audio.playBuffer(); size -= len; } } else { error("unknown header"); return; } } else { error("unable to read 5-byte header"); return; } } else { delay(2000); videofile = SD.open(FILENAME, FILE_READ); if (videofile) { Serial.println("File opened"); playing = true; elapsedSinceLastFrame = 0; } } } // when any error happens during playback, close the file and restart void error(const char *str) { Serial.print("error: "); Serial.println(str); videofile.close(); playing = false; } // when an error happens during setup, give up and print a message // to the serial monitor. void stopWithErrorMessage(const char *str) { while (1) { Serial.println(str); delay(1000); } }