Duetimer incompatible with FastLED?

[hans_leds]

I want to use DueTimer.h to read analog values every 200 microseconds and FastLed.h for controlling 2812B led’s. Both work fine separately, but the FastLED.show() instruction on line 17 seems to block the timer. In this program the timer does not function, but the timer does function if I comment the FastLED.show() instruction on line 17. How can I solve this?

#include <DueTimer.h>
#include “FastLED.h”
byte Speed_1; // For reading analog pin 4.
CRGB Leds[256]; // Total amount of led’s.
void setup() {
Serial.begin(115200);
FastLED.addLeds<WS2812B, 53, GRB>(Leds, 0, 256);
Read_Analog();
Timer.getAvailable().attachInterrupt(Read_Analog).setFrequency(5).start();
}
void loop() {
Speckle();
}
void Speckle() {
for (int x = 0; x < 256; x++) {
Leds = CHSV(Speed_1, 100, 20);
FastLED.show();
delay(Speed_1);
}
}
void Read_Analog() {
Serial.println(“In read_analog”);
Speed_1 = analogRead(4) / 4;
}

[UKHeliBob]

The easier you make it to read and copy the code the more likely it is that you will get help

Please follow the advice given in the link below when posting code

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[hans_leds]

Sorry for not quoting the code correctly in my first post on this forum. This is the code:

#include <DueTimer.h>
#include "FastLED.h"
byte Speed_1;     // For reading analog pin 4.
CRGB Leds[256];   // Total amount of led's.
void setup() {
  Serial.begin(115200);
  FastLED.addLeds<WS2812B, 53, GRB>(Leds,  0, 256);
  Read_Analog();
  Timer.getAvailable().attachInterrupt(Read_Analog).setFrequency(5).start();
}               
void loop() {
  Speckle();
}
void Speckle() {
  for (int x = 0; x < 256; x++) {
    Leds[x] = CHSV(Speed_1, 100, 20);
   FastLED.show();
    delay(Speed_1);
  }
}
void Read_Analog() {
  Serial.println("In read_analog");
  Speed_1 = analogRead(4) / 4;
}

[UKHeliBob]

The likely cause is a clash between the 2 libraries over the use of hardware timers

[hans_leds]

I do not yet have the programming skills to solve a hardware timer clash between libraries, but I found a workaround which does function in my case by simply avoiding the timer library and do the reading of the inputs every time FastLED.show is called, using this code:

#include "FastLED.h"
byte Speed_1;     // For reading analog pin 4.
CRGB Leds[256];   // Total amount of led's.
void setup() {
  Serial.begin(115200);
  FastLED.addLeds<WS2812B, 53, GRB>(Leds,  0, 256);
  Read_Analog();
}
void loop() {
  Speckle();
}
void Speckle() {
  for (int x = 0; x < 256; x++) {
    Leds[x] = CHSV(Speed_1, 100, 20);
    Refresh();
    delay(Speed_1);
  }
}
void Refresh() {
  Read_Analog();
  FastLED.show();
}

void Read_Analog() {
  Serial.println("In read_analog");
  Speed_1 = analogRead(4) / 4;
}