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GPIO IRQ example: add check for interrupt source (#401)

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9names 2022-07-28 10:14:20 +10:00 committed by GitHub
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1 changed files with 10 additions and 7 deletions
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rp2040-hal/examples/gpio_irq_example.rs
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@ -174,7 +174,9 @@ fn IO_IRQ_BANK0() {
// these will be of type `&mut LedPin` and `&mut ButtonPin`, so we don't have // these will be of type `&mut LedPin` and `&mut ButtonPin`, so we don't have
// to move them back into the static after we use them // to move them back into the static after we use them
let (led, button) = gpios; let (led, button) = gpios;
// Check if the interrupt source is from the pushbutton going from high-to-low.
// Note: this will always be true in this example, as that is the only enabled GPIO interrupt source
if button.interrupt_status(EdgeLow) {
// toggle can't fail, but the embedded-hal traits always allow for it // toggle can't fail, but the embedded-hal traits always allow for it
// we can discard the return value by assigning it to an unnamed variable // we can discard the return value by assigning it to an unnamed variable
let _ = led.toggle(); let _ = led.toggle();
@ -183,6 +185,7 @@ fn IO_IRQ_BANK0() {
// Do that now so we don't immediately jump back to this interrupt handler. // Do that now so we don't immediately jump back to this interrupt handler.
button.clear_interrupt(EdgeLow); button.clear_interrupt(EdgeLow);
} }
}
} }
// End of file // End of file