CC1314R10: The cc1314 is not entering in standby mode

Prashant Dhule

Part Number: CC1314R10
Other Parts Discussed in Thread: ENERGYTRACE

Tool/software:

Hi,

I am using CC1314 custom board. I want to use standby mode to reduce power consumption when there is no activity on UART.

My application is using freeRTOS. I ahve following questions

1. Can I use Power_sleep(PowerCC26XX_STANDBY); manually

2. Did I need to suspend task before entering int standby mode

3. What are the steps to put device into standby mode?

4. I have tried but device is not entering into standby mode

static void EnterStandbyMode(void)
{
  trx_off(); // close RF
  CloseUart();//closeUART
  StopTimer();//stop timer
  TaskDelay(pdMS_TO_TICKS(1000));  // Let system settle
  closeWatchdogTimer();
  /* Configure the UART Rx pin as GPIO pin as input with falling-edge interrupt*/
   GPIO_setConfig(CONFIG_GPIO_UART2_1_RX, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_FALLING);
   // Register the callback function
   GPIO_setCallback(CONFIG_GPIO_UART2_1_RX, GpioWakeUpCallback);
   // Enable GPIO interrupts
   GPIO_enableInt(CONFIG_GPIO_UART2_1_RX);
   printf("cc1314 is  in entering into standby mode \r\n");
   // Suspend the FreeRTOS scheduler
   vTaskSuspendAll();
   int retVal = Power_sleep(PowerCC26XX_STANDBY);  // Manually enter standby
   


  
  
  
   if(WakeupFlag)
   {
       // Resume the FreeRTOS scheduler after waking up
       xTaskResumeAll();
       OpenUart();
       WakeupFlag = false;
       printf("cc1314 is  in Active mode \r\n");
   }
}

void GpioWakeUpCallback(uint_least8_t index) {
    // Set the wake-up flag
    WakeupFlag = true;
    printf("cc1314 is  wake up from standby \r\n");
}

2 months ago

0 Arthur R☑️ 2 months ago

TI__Mastermind 25906 points

Hi Prashant,

If UART RX is enabled, the device will not enter standby (see: https://dev.ti.com/tirex/explore/content/simplelink_cc13xx_cc26xx_sdk_8_31_00_11/docs/drivers/doxygen/html/_u_a_r_t2_8h.html#a96db1cdb4fd1a5bfa856ead55297d95e).

You have to disable RX first, using UART2_rxDisable().

Let me know how it goes,

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

I have called UART2_rxDisable(). before closing UART.

One thing I forgot to add in previous question is that when I called int retVal = Power_sleep(PowerCC26XX_STANDBY); then device gets reset.

Same result is with UART2_rxDisable()

Default power configurations as below

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

__PRESENT

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi,

Which SDK version are you using? You should not modify the configuration structures directly.

Are you also using the same crystal on the custom board as the one on the CC1314 Launchpad? If you run your project on the launchpad, does it go into Standby?

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

sdk version : simplelink_cc13xx_cc26xx_sdk_8_30_01_01

currently I do not have Launchpad

on custom board 32k crystal is used

0 Prashant Dhule 2 months ago

Prodigy 30 points

Hi,

In debug mode, I think it is enter in standby mode as I gets return value 0 i.e Power_SOK.

I am little bit confused about return value description.

@retval #Power_SOK on success, the device has slept and is awake again.

Let me correct if I was wrong.

My understanding is device has slept until it is not wake up configured wake up source.

__PRESENT__PRESENT

0 Prashant Dhule 2 months ago

Prodigy 30 points

In debug mode I get return val is Power_SOK. Does it mean it wake up from standby mode?

__PRESENT

__PRESENT__PRESENT

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Prashant,

From which example project did you start? Also, what current consumption are you measuring?

Regards,

Arthur

0 Prashant Dhule 2 months ago

Prodigy 30 points

Hi Arthur

From which example project did you start? Also, what current consumption are you measuring?

=> I am referring SDK and reference manual.

=> Main objective is to put cc1314 in standby mode with freeRTOS base code and measure the current

=> How could I verify the device is entered in standby mode

=> If the device is standby mode and I want to wake up from standby when I received any data on UART

=> But currently I observed that device gets reset after calling => int retVal = Power_sleep(PowerCC26XX_STANDBY); // Manually enter standby

=> could you please suggest steps to follow to enter standby with freeRTOS

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Prasant,

Let's start by narrowing on the issue. What happens if you run the "empty" FreeRTOS project for the CC1314? empty This project will enter standby after every LED toggle.

If you do not have EnergyTrace, you can verify if your device has entered standby mode by probing the DCDC converter inductor, as shown here: CC1312R: cannot enter Standby mode for GPIO standby example - Sub-1 GHz forum - Sub-1 GHz - TI E2E support forums

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

WatchDog is not closing eventhough I have closed it.

By commenting watchdog code, I think device is entering in standby mode .

Could you please suggest how the device is configured to wake up from standby on UART interrupt?

I have configured Rx Pin as GPIO and configured interrupt as below. Is it correct?

  /* Configure the UART Rx pin as GPIO pin as input with falling-edge interrupt*/
    GPIO_setConfig(CONFIG_GPIO_UART2_1_RX, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING | GPIO_CFG_INT_ENABLE);
    // Register the callback function
    GPIO_setCallback(CONFIG_GPIO_UART2_1_RX, GpioWakeUpCallback);
    // Enable GPIO interrupts
    GPIO_enableInt(CONFIG_GPIO_UART2_1_RX);

I am sending data over UART but it is not wakeup as I added below line as below. Nothing is printed

status = Power_sleep(PowerCC26XX_STANDBY);

    

    if (status == Power_SOK) {

        printf("Successfully woke from standby");

    } else {

        printf("Failed to enter standby: %d", status);

    }

Could you please suggest how the device is configured to wake up from standby on gpio interrupt?

__PRESENT__PRESENT

0 Prashant Dhule 2 months ago in reply to Prashant Dhule

Prodigy 30 points

How to use AONEventMcuWakeUpSet with GPIO?

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Preshant,

We cannot wake up the device from standby on a wakeup interrupt. As explained before, having the UART RX buffer enabled will prevent the device from going into standby.

Please have a look at our gpiointerrupt example for how to wake up from standby from a GPIO interrupt: gpiointerrupt

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

Hi Arthur

Thanks for quick response.

There is no way to configure the device to wake up from standby on UART interrupt. Is it correct?

Is the below understanding is correct?

We need to implement our own "Wake on UART" functionality by configuring the RX pin as normal GPIO with interrupt enabled. Then when We get the PIN interrupt, release the pin from the PIN driver, open up the UART and perform a read.

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Prashant,

That's correct. However, you could do as you have described, but that may only work with very slow baudrates.

Another option would be to use the Sensor Controller that you have access to, and make it run the UART emulator: UART Emulator — Sensor Controller Studio v2.9.0 CC13x2 CC26x2 documentation

That way, you could use it to wake up the main M33 MCU if you receive a message of interest.

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

Hi Arthur

Thanks for quick response.

WatchDog is not closing eventhough I have closed it before entering into standby mode

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Prashant,

Please open a new thread as this is a new topic.

Regards,

Arthur

0 Prashant Dhule 2 months ago in reply to Arthur R☑️

Prodigy 30 points

Hi Arthur

I will create separate ticket for watchdog.

I have configured Rx Pin as GPIO and configured interrupt as below

/* Configure the UART Rx pin as GPIO pin as input with falling-edge interrupt*/
GPIO_setConfig(CONFIG_GPIO_UART2_1_RX, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING | GPIO_CFG_INT_ENABLE);
// Register the callback function
GPIO_setCallback(CONFIG_GPIO_UART2_1_RX, GpioWakeUpCallback);
// Enable GPIO interrupts
GPIO_enableInt(CONFIG_GPIO_UART2_1_RX);

Without standby mode iterrupt is triggered but after device is in standby then it is not triggered

0 Arthur R☑️ 2 months ago in reply to Prashant Dhule

TI__Mastermind 25906 points

Hi Prashant,

It may mean that the device never wakes up.. Was the empty project toggling the GPIO as expected?

Regards,

Arthur