CC1310: How to control pin state when entering sleep?

Hi AB,

The reference design uses SmartRF studio to configure the pin configuration to the frontend.

But I don't use SmartRF studio. I use a SimpleLink application. How can I do that?

In the example SimpleLink applications, the code in board_palna.c configures the pins that interfaces with CC1190 as the frontend.

But it's not clear how I can modify it for SKY66420-11, especially around how I can set the CSD pin to low when the application enters idle (or sleep).

More thoughts or ideas?

Thanks,

Eugene

Hi AB,

That wasn't very helpful. As I mentioned, I already found board_palna.c, and I don't see how I can configure the pin state during idle/sleep.

I pasted the code below. I see the code using the pin table to set the initial state, and also connect the pin to RF core signals.

Can you help point out how I can configure the idle/sleep state?

static PIN_Config palnaPinTable[] =
    {
        Board_CC1190_HGM | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL
            | PIN_DRVSTR_MAX, /* High Gain Mode by Default */
        Board_CC1190_LNA | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL
            | PIN_DRVSTR_MAX, /* LNA Off by Default */
        Board_CC1190_PA  | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL
            | PIN_DRVSTR_MAX, /* PA Off by Default */	
        PIN_TERMINATE /* Terminate list     */
    };

/* PA/LNA pin state */
static PIN_State palnaPinState;

/* PA/LNA Pin Handle */
static PIN_Handle palnaPinHandle;

/*!
 Initialize PA/LNA

 Public function defined in board_palna.h
 */
void Board_Palna_initialize(uint32_t hgm)
{
	if (hgm)
	{
	    CC13x0_LAUNCHXL_rfDisableCallback();

		if (!palnaPinHandle)
		{
			/* Open PA/LNA PIN driver */
			palnaPinHandle = PIN_open(&palnaPinState, palnaPinTable);
			
			/* Set IO muxing for RFC GPOs */
			PINCC26XX_setMux(palnaPinHandle, Board_CC1190_LNA, IOC_PORT_RFC_GPO0);
			PINCC26XX_setMux(palnaPinHandle, Board_CC1190_PA, IOC_PORT_RFC_GPO1);
		}
		
		PIN_setOutputValue(palnaPinHandle, Board_CC1190_HGM, (hgm & 1));
			
	}
}

Hi AB,

Thanks for all the links.

The challenge I have with the Skyworks front-end (that differs from CC190) is that the CSD pin must be on for both Tx and Rx. You can see from the truth table I attached above.

The RF core's GPO0 pin is enabled only for Rx and GPO1 pin is enabled only for Tx. How can I map the CSD pin to the RF core signals so that it is enabled for both Tx and Rx?

I see from another thread that is possible to map a RF core signal to multiple pins.

But can a pin be mapped to multiple RF core signals (in my case, map CSD to both RFC_GPO0 and RFC_GPO1)?

Thanks,

Eugene

Hi AB,

The PCB design has already been completed, and I am trying not to change it.

Which comes back to my original question: is it possible to control the state of a pin when entering sleep?

If I cannot map the CSD pin (which is like a global enable for the frontend) to the RF core signals, I could maybe control it manually in the application. But then I would need a way to disable it when entering sleep, and then enable it when waking up. Is there a way to do that?

Thanks,

Eugene