B4R Question Inline C pooling

[rdkartono]

I have 8 pins A7~A0 and 8 pins D7~D0.
The signal is : if A7=high, ignore it. If A7=low, time to read all A7~A0 and D7~D0.

So I tried using A7.Addlistener function, or addlooper function, but still not fast enough to get all readings.

So is it possible I create an inline C function, that doing :
while (true) {
....
....
}

My purpose is to get (much) faster A7 response.

 

[Erel]

Moving the loop to C will not make it faster.

AddListener should be the fastest method (without using interrupts).

Make sure that there isn't any other code that slows down the events.

 

[rdkartono]

This morning I did measurement with Oscilloscope, found out that A7 low pulse width is only 2 uS. And between A7 pulse to next pulse is 50uS interval. I guess interrupt approach is the best now, any suggestion ?

 

[Erel]

Running code from interrupts is problematic. Currently B4R doesn't support pin interrupts.

You can try to use PulseIn: https://www.arduino.cc/en/Reference/PulseIn

https://www.b4x.com/android/forum/threads/ultrasonic-ranging-module-hc-sr04.65786/