Random freeze while entering usleep

[wired-dev]

#0 0x76ccb00c in nanosleep () at ../sysdeps/unix/syscall-template.S:84
#1 0x76cf9a6c in usleep (useconds=useconds@entry=100)
at ../sysdeps/posix/usleep.c:32
#2 0x0001e738 in bcm2835_delay (millis=millis@entry=10) at bcm2835.c:452
#3 0x000195cc in RF24Network::update (this=0x35490 )
at RF24Network.cpp:167
#4 0x0001b8e4 in RF24Mesh::update (this=0x35540 ) at RF24Mesh.cpp:48
#5 0x0001cfd0 in RF24Gateway::handleRadioIn (this=this@entry=0x35388 )
at RF24Gateway.cpp:278
#6 0x0001d20c in RF24Gateway::update (this=this@entry=0x35388 ,
interrupts=interrupts@entry=false) at RF24Gateway.cpp:254
#7 0x00011ecc in main (argc=, argv=)
at RF24GatewayNode.cpp:42