CC1352P: Load module not reporting correct value

Scott Scharfenberg

Part Number: CC1352P
Other Parts Discussed in Thread: SYSBIOS

Hello,

I am trying to implement the Load module so that we can monitor total time spent in/out of Idle. I added the following code to the relevant release.cfg file:

/* ================ Load configuration ================ */
var Load = xdc.useModule('ti.sysbios.utils.Load');
Load.taskEnabled = true;
Load.updateInIdle = true;
Load.windowInMs = 500;
 
Load.common$ = undefined;
Load.enableCPULoadCalc = true;
Load.minIdle = 0;

I have a Task that then calls Load_getCPULoad() periodically and uses this percentage to update a counter which is supposed to show total time spent outside of the Idle loop.

Unfortunately Load_getCPULoad() always reports 100% CPU usage, which is baffling given that the execution graph shows we are in Idle ~99% of the time. I would expect Load_getCPULoad() to return something more like 1 or 0.

I have tried other configurations as well, including setting Load.updateInIdle to false and manually calling Load_update() from the aforementioned Task. The result is the same.

Any advice is appreciated.

Thanks,

Scott

9 months ago

0 Marie H 9 months ago

TI__Guru 74941 points

Hi Scott,

I'm not sure whether we can support your request. I will check internally.

In the mean while, can you specify:

1. Which version of the SDK are you using?

2. Does your device ever go to standby (sleep)?

Cheers,

Marie H

0 Scott Scharfenberg 9 months ago in reply to Marie H

Prodigy 30 points

Hi Marie,

Thanks for the reply. We are using SDK 4.30.0.54. Regarding standby/sleep, I believe it does. We are using the Power module's idle function (we have Idle.addFunc('&Power_idleFunc') for the Idle configuration in release.cfg). This is the power config we have in ti_drivers_config.c:

/*
 *  =============================== Power ===============================
 */
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26X2.h>
#include "ti_drivers_config.h"

extern void PowerCC26XX_standbyPolicy(void);
extern bool PowerCC26XX_calibrate(unsigned int);

const PowerCC26X2_Config PowerCC26X2_config = {
    .enablePolicy             = true,
    .policyInitFxn            = NULL,
    .policyFxn                = PowerCC26XX_standbyPolicy,
    .calibrateFxn             = PowerCC26XX_calibrate,
    .calibrateRCOSC_LF        = true,
    .calibrateRCOSC_HF        = true,
    .enableTCXOFxn            = NULL
};

0 Marie H 9 months ago in reply to Scott Scharfenberg

TI__Guru 74941 points

Hi Scott,

Unfortunately we can't support your request. XDCTools and TI-RTOS6 is no longer under development.

I would recommend searching on the forum in case someone has had a similar issue.

Regarding power modes, you can use Energy Trace on your LaunchPad to take a current measurement while the code is running. You can see from the current consumption whether the device is in standby, idle or active.

https://dev.ti.com/tirex/explore/content/simplelink_cc13xx_cc26xx_sdk_7_10_01_24/docs/ti154stack/html/energy-trace/energy-trace.html

Cheers,

Marie H

Sub-1 GHz

Sub-1 GHz forum

CC1352P: Load module not reporting correct value