axi timer

I found that simply initializing a timer and trying to use it will have ghost behaviors: sometimes generating pwm and sometimes not

&Timer = 0x1E01C17C
SP = 0x1E01C178
BaseAddress = 0x42800000
IsReady = 286331153
IsPwmEnabled = 1
sizeof(XTmrCtr) = 44

If you create timer in stack, you might run issue with reading stale data in memory because timer initialization doesnt reset all the bits. Temporary fix is to do memset(&Timer, 0, sizeof(Timer)); right after initializing Timer:

    XTmrCtr Timer;
	memset(&Timer, 0, sizeof(Timer));

Permanent fix is to add this line to XTmrCtr_CfgInitialize():

InstancePtr->IsPwmEnabled = FALSE;
InstancePtr->IsStartedTmrCtr0 = 0;
InstancePtr->IsStartedTmrCtr1 = 0;