system
1
Hello,
I'm trying connect Arduino with ps/2 keyboard. Looks like I don't understand how digital input/output works.
I have instructions what to do:
- Bring the Clock line low for at least 100 microseconds.
- Bring the Data line low.
- Release the Clock line.
How to bring Clock line low for 100 microseconds (with functions pinMode and digitalWrite). And how to release clock line ?
Don't forget 'millis()' and 'micros()'
MarkT
3
release as in high-impedance state?
system
4
Keyboard every time is in READ state.
I looked in other people source code it's:
pinMode(irq_pin, INPUT);
digitalWrite(irq_pin, HIGH);
pinMode(data_pin, INPUT);
digitalWrite(data_pin, HIGH);
attachInterrupt(irq_num, interrupt, FALLING);
So I think YES.
Now Arduino can receive data from keyboard.
And now i want to send some data.. So if i want write 1) 2) 3) steps in code I need to write:
-
digitalWrite(irq_pin, LOW);
delayMicroseconds(100) ;
2)
digitalWrite(data_pin, LOW);
3)
digitalWrite(irq_pin, HIGH) ;
Does I'm correct ?
Just one question. It's INPUT.. how can i send LOW or HIGH. I though it's possible only with OUTPUT.
Thanks.