noInterrupts() and delayMicroseconds(200) hangs the processor on a RP2040

[Tiny-Spider]

• Arduino board: Adafruit RP2040 CAN Bus Feather

• Arduino IDE version: 2.2.3

It seems that delayMicroseconds(200); requires interrupts on a RP2040. When using the code as is, the RP2040 hangs when it reaches this function, rendering the RP2040 non-responsive. Removing the delay seems to fix all issues, but should probably be replaced for something else.

Adafruit_TLC59711/Adafruit_TLC59711.cpp

Line 106 in b26853a

delayMicroseconds(200);

Example code that hangs (it will never print "set brightness"):

#include <Adafruit_TLC59711.h>

Adafruit_TLC59711 tlc(1, D25, D24);

void setup() {
  Serial.begin(115200);
  while(!Serial) delay(10);

  Serial.println("setup()");

  tlc.begin();
  tlc.simpleSetBrightness(100);
  tlc.write();

  Serial.println("set brightness");
}

void loop() { }