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Rewrote in simpler language. Added another example.

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Ron Hale-Evans 2016-06-22 15:35:20 -07:00
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docs/reference/pins/digital-write-pin.md
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@ -1,19 +1,29 @@
# Digital Write Pin
Write the value ``0`` or ``1`` to the specified (digital) [pin](/device/pins). **Some pins are also used by the display, read the [pin documentation ](/device/pins) carefully.**
Write a **digital** (`0` or `1`) signal to a [pin](/device/pins) on
the micro:bit 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 - the pin name (``P0``, ``P1``, ``P2``, ...)
* value - [Number](/reference/types/number); 0 or 1
* a [string](/reference/types/string) that stores the name of the pin (``P0``, ``P1``, or ``P2``, up through ``P20``)
* a [number](/reference/types/number) that can be either `0` or `1`
### Example: football score keeper
The following example reads `P0` to determine when a goal is scored. When `P0 = 1`, the code uses `digital write pin` to play a buzzer sound:
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
@ -29,7 +39,25 @@ basic.forever(() => {
})
```
This program is a remote control for the score keeper program. If you
connect `P1` on the remote control micro:bit to `P0` on the score
keeper micro:bit, you can press button `B` on the remote. This program
will use ``digital write pin`` to make the other micro:bit 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
[micro:bit 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)
[micro:bit 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)