More than one attachInterrupt on the same pin

Troubleshooting
1

I am on Photon 0.7.0-rc.4
I am refining a program that has 4 touch capacitive buttons 1 to 4 each attached to D4, D5, D6 and D7 respectively.

I use button1 to allow detection of a wake by user event from sleep on touching the button1. System.sleep(button1, RISING, SLEEPTIME);

All the pins are setup thus: pinMode(button1, INPUT_PULLDOWN);

I am also using the same pin to re-light a dimmed screen attached to an ISR thus: attachInterrupt(button1, wakeupButtonPressed, FALLING); The ISR routine simply sets a volatile bool which is detected and reset in the application.

This was all working fine. I then tried to add an ISR thus to each button; attachInterrupt(button1, button1Pressed, RISING);

The idea being to note the time using millis() that the button was pressed (volatile uint32_t used) so that in the application I could tell whether the button had been pressed and held for a certain period. This does not appear to be working - can I assume that attachInterrupt can only be used once per pin even if the ISR and mode are different?

2

Exactly.
If you want to detect the rising and the falling edge, you need to go for a CHANGE interrupt and read the state of the pin as fast as possible after the trigger (e.g. pinReadFast())

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