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I didn't know that CW2. Somewhere I read the timing could be off by 4us
Well, it certainly takes some time for the native interrupt handler to execute, but I don't have any numbers
I guess it also depends on what you consider low level code, as pin logic certainly could be considered really low level code
I guess in principle yes, but there is no code executed in the similar way like CPU executes its instructions. The pin
Is there any reason to re-use an event handler other than to save memory, and we are talking about a very tiny routine as discussed.
Personally, I sometimes re-use event handler when I need to handle multiple buttons, like this
...
InterruptPort button1 = new InterruptPort(Pins.GPIO_PIN_D0, ...);
InterruptPort button2 = new InterruptPort(Pins.GPIO_PIN_D1, ...);
InterruptPort button3 = new InterruptPort(Pins.GPIO_PIN_D2, ...);
...
button1.OnInterrupt += button_Interrupt;
button2.OnInterrupt += button_Interrupt;
button3.OnInterrupt += button_Interrupt;
...
void button_Interrupt(uint data1, uint state, DateTime time)
{
var pin = (Cpu.Pin)data1;
var on = (state != 0);
switch(pin)
{
case Pins.GPIO_PIN_D0:
...
break;
case Pins.GPIO_PIN_D1:
...
break;
...
}
// Or use data1 as array index, collection key etc.
}
It also makes diagnostic/troubleshooting easier in certain cases.
