CYW43907 GPIO Wake from sleep

NiMc_1688136 · ‎Jul 30, 2019

I am running the CYW43907 in sleep mode (not deep sleep).

How can i use a GPIO pin ( WICED_GPIO_6) as a wake source? I have the pin externally pulled high with a 47K resistor and attempting to pull low through a button but no luck.

wiced_gpio_init(WICED_GPIO_6, INPUT_HIGH_IMPEDANCE );
wiced_gpio_input_irq_enable(WICED_GPIO_6, IRQ_TRIGGER_FALLING_EDGE, gpio_callback, NULL); /* Setup interrupt */

Does not work in sleep mode, it works well in normal mode.

If i add

wiced_gpio_deepsleep_wakeup_enable( WICED_GPIO_6, IRQ_TRIGGER_FALLING_EDGE );

It still does not appear to wake up, but this also does not provide any callback mechanism to unblock a task if needed.

WICED SDK 6.2.1

NiMc_1688136 · ‎Jul 31, 2019

Yes, thanks Priya.

For others, the following code is correct as a sleep wakeup.

wiced_gpio_init(WICED_GPIO_6, INPUT_HIGH_IMPEDANCE );
wiced_gpio_input_irq_enable(WICED_GPIO_6, IRQ_TRIGGER_FALLING_EDGE, gpio_callback, NULL); /* Setup interrupt */

My problem was that in my app code, i was changing the pin to an output while active for another use. What I did not know, inside of wiced_gpio_init, the ISR is disabled and the callback is cleared to NULL. This is why the input interrupt and wake was not working.

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CYW43907 GPIO Wake from sleep

CYW43907 GPIO Wake from sleep

Re: CYW43907 GPIO Wake from sleep