The CC31xx can be enabled and disabled by controlling the nHib signal. The host MCU controls the nHib signal by changing the output of a GPIO. The host can toggle the GPIO followed by a 10 millisecond delay. This delay ensures that the host driver observes the minumim hibernate time according to the timing requirements in the device-specific data sheet.

user.h:

#define sl_DeviceEnable()     NwpPowerOn()
#define sl_DeviceDisable()    NwpPowerOff()

cc_pal.h:

extern void NwpPowerOn(void);
extern void NwpPowerOff(void);

cc_pal.c:

void NwpPowerOn(void)
{
    HAL_GPIO_WritePin(HOST_nHIB_PORT, HOST_nHIB_PIN, 1);
}

void NwpPowerOff(void)
{
    HAL_GPIO_WritePin(HOST_nHIB_PORT, HOST_nHIB_PIN, 0);
    /* wait 10 msec */
    HAL_Delay(10);
}