CC1354P10: Low power mode is not working

Satya Raji

Part Number: CC1354P10

Tool/software:

Hello,

I am working on power down modes with CC1354P10-1 board and simplelink_cc13xx_cc26xx_sdk_7_40 SDK. For this I choose an example project "gpioshutdown_LP_EM_CC1354P10_1_freertos_ticlang" from stock examples.

When I build this and download on to the board all working good and I could see the power going to uA when the onboard button pressed. All good so far.

Further I would like to use the shutdown time from the function "Power_shutdown( shutdownState, shutdownTime)", I would expect the second parameter in this function should be a delay to wakeup automatically from the shutdown. Which never works/wakeup.

Also, I would lie to use other power modes sleep and idle. Can anyone help me how to use these modes any documents or examples would highly appreciated. Regards.

Satya

11 months ago

0 Arthur R☑️ 11 months ago

TI__Mastermind 23829 points

Hi Satya,

As per the datasheet, we cannot wake up the device using the RTC, as only the pin-edge wakeup is supported in that mode:

I do agree the function prototype is missleading, but I assume it was done to keep API compatibility with other SimpleLink devices. The shutdownTime parameter is not used in that method.

However, if you want to go into Standby Mode for a given period of time, you can do that by using the sleep functions. You can have a look at the "empty" example, which shows how to do it.

Regards,

Arthur

0 Satya Raji 11 months ago in reply to Arthur R☑️

Prodigy 130 points

Thanks Arthur.

Looks like the Empty example application working for me. I have to measure my board power for the final numbers.

Further, I would like to request you to help me in getting some examples/frameworks for Timers (especially capture mode), RTC, Battery monitor sample applications. Appreciate your help.

Regards,

Satya Raji

0 Arthur R☑️ 11 months ago in reply to Satya Raji

TI__Mastermind 23829 points

Hi Satya,

You can have a look at the following solved questions:

Should you have any issue with those, please open a new E2E thread so that it will be easier for users to find related answers.

Regards,

Arthur

0 Satya Raji 11 months ago in reply to Arthur R☑️

Prodigy 130 points

Hi Arthur,

Thanks for your information. Empty example is working as expected. But when I try to add the 868radio, the sleep current never goes bellow 2mA. I guess I am missing some system blocks to shutdown before calling sleep().

Can you please help me in rfUartBridge example to add sleep function. Lets say after some iterations of while, I would like to sleep for 5sec. Please correct me if I miss some thing in the following code block.

While (1){

---- rx and tx -- -- -- -- --

if(tempCount ++ >0x8FFF)
{
/*Cancel the ongoing command*/
RF_cancelCmd(rfHandle, rfPostHandle, 1);

//UART2_close(uart);

RF_cancelCmd(rfHandle, rfPostHandle, 1);
RF_close(rfHandle);
GPIO_write(CONFIG_GPIO_RLED, CONFIG_GPIO_LED_OFF);

GPIO_write(CONFIG_GPIO_GLED, CONFIG_GPIO_LED_OFF);
GPIO_write(CONFIG_GPIO_RLED, CONFIG_GPIO_LED_OFF);
for(i=0; i<0xFFF; i++);
tempCount = 0;
sleep(5);

}

If I close the Radio and disable the UART read call, my code seems working. But when I wakeup and, when time to transmit some new data, the radio never works. I called a fresh RF_open(...) still my radio never wake up.

Appreciate your support! Regards.

Sub-1 GHz

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CC1354P10: Low power mode is not working