I am trying to get a strip of WS2801 LEDs to work.
I have a 5m strand but for test purposes I am only trying to use the first 6 leds.
The problem is that the first LED is flickers bright white. It is never blue as I configured. The second led is usually blue but sometimes turns white for short periods of time. The stand sometimes resets then goes back to the correct color sequence except for the first LED that is always white.
At times, pixel 9 will turn on a washed out blue and it stays on until I disconnect the power.
The key question is why are the first couple of pixels not displaying the correct color? Is it because I am only trying to use the first few pixels on a longer stand?
#include "FastSPI_LED2.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
//
// RGB Calibration code
//
// Use this sketch to determine what the RGB ordering for your chipset should be. Steps for setting up to use:
// * Uncomment the line in setup that corresponds to the LED chipset that you are using. (Note that they
// all explicitly specify the RGB order as RGB)
// * Define DATA_PIN to the pin that data is connected to.
// * (Optional) if using software SPI for chipsets that are SPI based, define CLOCK_PIN to the clock pin
// * Compile/upload/run the sketch
// You should see six leds on. If the RGB ordering is correct, you should see 1 red led, 2 green
// leds, and 3 blue leds. If you see different colors, the count of each color tells you what the
// position for that color in the rgb orering should be. So, for example, if you see 1 Blue, and 2
// Red, and 3 Green leds then the rgb ordering should be BRG (Blue, Red, Green).
// You can then test this ordering by setting the RGB ordering in the addLeds line below to the new ordering
// and it should come out correctly, 1 red, 2 green, and 3 blue.
//
//////////////////////////////////////////////////
#define NUM_LEDS 8
// Data pin that led data will be written out over
#define DATA_PIN 11
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define CLOCK_PIN 13
CRGB leds[NUM_LEDS];
void setup() {
// sanity check delay - allows reprogramming if accidently blowing power w/leds
delay(2000);
// Uncomment one of the following lines for your leds arrangement.
// FastLED.addLeds<TM1803, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1804, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<TM1809, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<UCS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
FastLED.addLeds<WS2801, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<SM16716, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<LPD8806, RGB>(leds, NUM_LEDS);
//FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<SM16716, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
// FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
}
void loop() {
leds[0] = CRGB::Blue;
leds[1] = CRGB::Blue;
leds[2] = CRGB::Green;
leds[3] = CRGB::Red;
leds[4] = CRGB::Blue;
leds[5] = CRGB::Red;
FastLED.show();
delay(1000);
}