Using TTC in ZCU102

[asif siddiqui]

Hi Edgar,

I have build qemu using https://github.com/edgarigl/gemu/tree/zynqmp-ttc branch. 

While using the TTC counter i configured the registers as below - 

#define TTC_BASE  0xFF110000U

#define TTC1_COUNTER_VALUE_OFFSET 0x00000018U

#define TTC1_COUNTER_CONTROL_OFFSET 0x0C

Before reading the TTC counter value i am resetting the register (TTC_BASE + TTC1_COUNTER_CONTROL_OFFSET ) by writing 0.

And then reading the register (TTC_BASE + TTC1_COUNTER_VALUE_OFFSET) for counter value. But the values when reading counter are not incrementing correctly and is random. Please find below the TTC counter values - 

Could you please help me if the configuration of counter control is not correct ? 

The counter values - 

[Simulation] TTC0 Counter : 58783
[Simulation] TTC0 Counter : 62613
[Simulation] TTC0 Counter : 1072
[Simulation] TTC0 Counter : 58891
[Simulation] TTC0 Counter : 1689
[Simulation] TTC0 Counter : 63359
[Simulation] TTC0 Counter : 59341
[Simulation] TTC0 Counter : 58836
[Simulation] TTC0 Counter : 65018
[Simulation] TTC0 Counter : 2138
[Simulation] TTC0 Counter : 2853
[Simulation] TTC0 Counter : 64863
[Simulation] TTC0 Counter : 59633
[Simulation] TTC0 Counter : 62571
[Simulation] TTC0 Counter : 49843
[Simulation] TTC0 Counter : 46746
[Simulation] TTC0 Counter : 43372
[Simulation] TTC0 Counter : 46380
[Simulation] TTC0 Counter : 47573
[Simulation] TTC0 Counter : 49323
[Simulation] TTC0 Counter : 51549
[Simulation] TTC0 Counter : 53395
[Simulation] TTC0 Counter : 49658
[Simulation] TTC0 Counter : 50283
[Simulation] TTC0 Counter : 25091
[Simulation] TTC0 Counter : 31857
[Simulation] TTC0 Counter : 46708

Regards

Asif