tlc.update() always returns immediately. It doesn't wait for the LEDs to update.
You need to look at the flag returned by tlc.update() and wait for it to return a 0m like this:
while (tlc.update()) {
}
tlc.update() always returns immediately. It doesn't wait for the LEDs to update.
You need to look at the flag returned by tlc.update() and wait for it to return a 0m like this:
while (tlc.update()) {
}