interrupts disabled during call to prevent re-entrancy

vudt2412 · Joined: 13 Aug 2012 Posts: 1

Hello everyone,
CCS compiler give me a warining:

>>> warnning 216: interrupts disabled during call to prevent re-entrancy:[@PSTRINGC7_115200_62_63]

But I don't know the reason. The program can't work properly? Would you pls tell me? please help...
Idea

Douglas Kennedy · Joined: 07 Sep 2003 Posts: 755 Location: Florida

Chances are you have bloated up an isr. The rule for isr's is never never ever put printf or float in an isr. Now you might break the rule during testing but you must be aware of the time a printf or float calc blocks the isr.
Here your issue is related to string routines.

asmboy · Joined: 20 Nov 2007 Posts: 2128 Location: albany ny

post your code in question???

mr_Orange · Joined: 14 Apr 2012 Posts: 12

I do get the same message because I use fprintf() in the HLVDIN interrupt. I think that the compiler is warning you about the possibility that while main is using fprintf() the interrupt routine is called so it tries to start fprint() a second time while the first fprintf() is not finished. I think the interrupt will start up after finishing the first fprintf() in main() so there will be a delay in starting the interrupt routine.

Since in my case HLVDIN detects that the controller is powered down I don't bother since the fprintf() in the interrupt is executed and the program stays in the HLVDIN interrupt routine until the power is gone.