RTOS/PROCESSOR-SDK-K2G: How to get accurate clock ticks?

Here is some code that we have used in the past to genrate a 10 ms clock tick :

var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.cpuFreq.hi = 0;
BIOS.cpuFreq.lo = 600000000; /* 600 MHz */

/***********************************************
* CLOCK Module Configuraion *
***********************************************/
var Clock = xdc.useModule("ti.sysbios.knl.Clock");
Clock.tickMode = Clock.TickMode_PERIODIC;
Clock.tickSource = Clock.TickSource_USER;

/***********************************************
* Timer Module Configuraion *
***********************************************/
/* Set to 1-ms Tick */
var Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
var timerParams = new Timer.Params();
timerParams.period = 1000 * 10;
/* Timer ID = 1 for Timer1 and input clock runs at 24 MHz */
Timer.intFreqs[1].hi = 0;
Timer.intFreqs[1].lo = 24000000;
Timer.create(1, '&mainTimerTick', timerParams);

The timer mapping table is available here:

bios_6_52_00_12/packages/ti/sysbios/timers/timer64/doc-files/TimerTables.html

Hope this helps.

Regards,

Rahul

Joshua,

I accidentally provided the settings from AM57xx devices where the input to the timer is the CLK IN. On Keystone 2 device the input is CHIP_CLK1/6 which seems to be 100000000 and not 25000000. I beleive this should fix your issue.

I also looked at the config file for the MCASP Audio loopback example  where the timer is configured as shown below:

// Change Timer frequency
// Set Timer64 freq to 100MHz
var Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
for (var idx = 0; idx < 7; idx++) {
Timer.intFreqs[idx].lo = 100000000;
Timer.intFreqs[idx].hi = 0;
}

Regards,

Rahul