CCS/TMS320F28377D: Setting CPU TIMER2 for particular time

Tool/software: Code Composer Studio

Hello,

I want to turn on switch through GPIO , I used delay function to do this job, at the same time i also turn on CPU TIMER2 for 20us  and change from mode=0 to mode=1.  my question is how to  open timer2 and set timer2 for 20us, after delay

InitCpuTimers();

ConfigCpuTimer(&CpuTimer2, 200, 1000000);
CpuTimer2Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0

EALLOW;

GpioCtrlRegs.GPCPUD.bit.GPIO68 = 0;
GpioCtrlRegs.GPCMUX1.bit.GPIO68 = 0; // GPIO11 = GPIO27
GpioCtrlRegs.GPCDIR.bit.GPIO68 = 1; // GPIO11 = output

GpioDataRegs.GPCCLEAR.bit.GPIO68 = 1;

mode = 0;

DELAY_US(433333);

GpioDataRegs.GPCSET.bit.GPIO68 = 1;

//Open timer2         ???
// Set a timer 20u??

//change mode
mode = 1;