adafruit
setPixelColor resets ESP8266
I am using this library to control LED strip with WS2812B. When I use setPixelColor, the MCU resets with exception 9 or 2. Below is my code to change colors.
void process_leds(void)
{
switch (rc_leds.type)
{
case LED_SOLID:
{
if ( strip_length > 0){
for (uint16_t i=0;i<strip_leds.numPixels();i++)
// strip_leds.setPixelColor(i, rc_leds.r, rc_leds.g, rc_leds.b);
strip_leds.show();
Serial.printf("LED: %d %d (%d, %d, %d)", rc_leds.type, strip_length, rc_leds.r, rc_leds.g, rc_leds.b);
rc_leds.type = LED_COMPLETE;
}
break;
}
}
}
The error message is LED: 3 6 (0, 25, 0) Exception (9): epc1=0x40218ff4 epc2=0x00000000 epc3=0x00000000 excvaddr=0x19000039 depc=0x00000000
ctx: sys sp: 3ffffd80 end: 3fffffb0 offset: 01a0
If I take out the FOR loop with the setPixelColor, the MCU does not reset.
The setPixelColor() line is commented out, so the for loop is really executing the .show() call multiple times. (It's always good to use curly braces in all cases to avoid this kind of problem.)
Could you repost in https://forums.adafruit.com and include your entire code? Since we can't see how strip_leds is set up, it's not clear what the problem is. Thanks.
Yes, I took out the for loop. Tested FastLED, and it is working. Ideally, want to use Adafruit Neopixel library, as it allows update of number of LEDs, whereas FastLED is hardcoded array.