64 lines
1.7 KiB
Markdown
64 lines
1.7 KiB
Markdown
# Digital Write Pin
|
|
|
|
Write a **digital** (`0` or `1`) signal to a [pin](/device/pins) on
|
|
the @boardname@ board.
|
|
|
|
```sig
|
|
pins.digitalWritePin(DigitalPin.P1, 1)
|
|
```
|
|
|
|
### ~avatar
|
|
|
|
Some pins are also used by the [LED screen](/device/screen).
|
|
Please read the [page about pins](/device/pins) carefully.
|
|
|
|
### ~
|
|
|
|
### Parameters
|
|
|
|
* ``name`` is a [string](/reference/types/string) that stores the name of the pin (``P0``, ``P1``, or ``P2``, up through ``P20``)
|
|
* ``value`` is a [number](/reference/types/number) that can be either `0` or `1`
|
|
|
|
### Example: football score keeper
|
|
|
|
This program reads pin `P0` to find when a goal is scored. When `P0`
|
|
is `1`, the program makes the score bigger and plays a buzzer sound
|
|
through `P2` with ``digital write pin``.
|
|
|
|
```blocks
|
|
let score = 0
|
|
basic.showNumber(score)
|
|
basic.forever(() => {
|
|
if (pins.digitalReadPin(DigitalPin.P0) == 1) {
|
|
score++;
|
|
pins.digitalWritePin(DigitalPin.P2, 1)
|
|
basic.showNumber(score)
|
|
basic.pause(1000)
|
|
pins.digitalWritePin(DigitalPin.P2, 0)
|
|
}
|
|
})
|
|
```
|
|
|
|
This program is a remote control for the score keeper program. If you
|
|
connect `P1` on the remote control @boardname@ to `P0` on the score
|
|
keeper @boardname@, you can press button `B` on the remote. This program
|
|
will use ``digital write pin`` to make the other @boardname@ buzz and
|
|
make the score bigger.
|
|
|
|
```blocks
|
|
input.onButtonPressed(Button.B, () => {
|
|
pins.digitalWritePin(DigitalPin.P1, 1);
|
|
basic.pause(500);
|
|
pins.digitalWritePin(DigitalPin.P1, 0);
|
|
});
|
|
```
|
|
|
|
### See also
|
|
|
|
[@boardname@ pins](/device/pins),
|
|
[digital read pin](/reference/pins/digital-read-pin),
|
|
[analog read pin](/reference/pins/analog-read-pin),
|
|
[analog write pin](/reference/pins/analog-write-pin),
|
|
[on pin pressed](/reference/input/on-pin-pressed)
|
|
|