timer counting in AT89s8252

i'm currently doing a code on counting timer but there are error while my port3^2 and port^2(START==0&&STOP==0)and port3^2 and port^2(START==0&&STOP==1) and then it goes into the disassembly then cant...
timer counting in AT89s8252

i'm currently doing a code on counting timer but there are error while my port3^2 and port^2(START==0&&STOP==0)and port3^2 and port^2(START==0&&STOP==1) and then it goes into the disassembly then cant...
Cortex-A35 Counter-timer Physical Count register (CNTPCT_EL0) always reads zero

Counter-timer Physical Count register CNTPCT_EL0 always reads zero on FVP_Base_Cortex-A35x1. I expect the value of this register to change over time. I set $CNTFRQ_EL0=35000000, and $CNTP_CTL_EL0...
Cortex-A35 Counter-timer Physical Count register (CNTPCT_EL0) always reads zero

Counter-timer Physical Count register CNTPCT_EL0 always reads zero on FVP_Base_Cortex-A35x1. I expect the value of this register to change over time. I set $CNTFRQ_EL0=35000000, and $CNTP_CTL_EL0...
calculting timer values

Hi I would like to how to calculate the value that should be loaded into T0MR0 register to create a 2 sec delay? Thanks