Unintended resume from DeepSleep

[hamatron]

I am developing a USB device with LPC55S66.
I implemented suspend/resume using the SDK sample of power_manager_lpc as a reference, and it seemed to work well, but after a few minutes after suspend, it resumes. At this time, the PC is still in sleep mode and no other USB devices are being resumed.

I have set only WAKEUP_USB1_NEEDCLK and WAKEUP_USB1 as the wake-up source for Deep Sleep.

What could be the cause?
Thanks in advance.

[ZhangJennie]

Hi

Did you revise demo code power_manager_lpc?

How can I reproduce your problem?

Thanks,

Jun Zhang

[hamatron]

Sorry, I made a mistake with the SDK sample I referenced. The correct one is dev_suspend_resume_hid_mouse_bm.
The changes I made were to the exclusions from sleep, wake-up source, and RAM retention settings.　However, even before I made this change, it was getting angry at me for resuming from suspend.

#if ((defined(USB_DEVICE_CONFIG_LPCIP3511HS)) && (USB_DEVICE_CONFIG_LPCIP3511HS > 0U))
#define APP_EXCLUDE_FROM_DEEPSLEEP \
    (kPDRUNCFG_PD_USB1_PHY | kPDRUNCFG_PD_LDOUSBHS)
#define APP_DEEPSLEEP_WAKEUP_SOURCE  (WAKEUP_USB1_NEEDCLK | WAKEUP_USB1)
#define APP_DEEPSLEEP_SRAM_RETENTION (0x7FFF)
#endif

I also changed the USB_LowPowerPreSwitchHook to power save DAC/ACD, LED drivers, etc.

void USB_PowerPreSwitchHook(void)
{
    // software shutdown LED driver
    // LED32327_WriteRegister(LED_DEMO_I2C_BASE_ADDRESS,LED_DEMO_I2C_ADDRESS, 0x00, 0);
    // hardware shutdown LED driver
    GPIO_PinWrite(GPIO, 0, 2, 0);
    // mute dac and set direction to IN
    GPIO_PinWrite(GPIO, 0, 24, 0);
    gpio_pin_config_t mute_dac_pin;
    mute_dac_pin.pinDirection = kGPIO_DigitalInput;
    GPIO_PinInit(GPIO, 0, 24, &mute_dac_pin);
    // power-down ADC
    TLV320ADC3100_Deinit();
    // stop audio
    stop_audio();

 //211116
 	/* set high of InRush Current Test Control Pin */ 
 	GPIO_PinWrite(GPIO, 0, 22, 0);

    USB_PreLowpowerMode();
}

Thanks.