Use of uninitialized value in division (/) at pwm.pl line 26.
Illegal division by zero at pwm.pl line 26.
Attempt to free temp prematurely: SV 0x8f6a3f8, Perl interpreter: 0x8f53008.
Attempt to free unreferenced scalar: SV 0x8f6a3f8, Perl interpreter: 0x8f53008.