Negative value for MacCtx.RxWindow1Delay

[LarryZalesky]

Hello all,

I’ve been working on a system that has LoRaMAC-node ported to a custom board running an NXP processor. At the bottom, we are using the NXP/Freescale provided software for OSTimer.

I’ve been seeing a problem where the NXP/Freescale code is being asked to set a compare to an invalid time. After working my way through it, I am seeing MacCtx.RxWindow1Delay set to a negative number in ComputeRxWindowParameters (of LoRaMac.c) because MacCtx.RxWindow1Config.WindowOffset is a small negative number. Since these variables are unsigned 32-bit values, this results in a value a little over 4 billion mS.