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pass over LED screen

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Tom Ball 2016-06-13 21:42:55 -04:00
parent 23c4087830
commit 713dfec949
1 changed files with 14 additions and 7 deletions
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21
docs/device/screen.md
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@ -3,7 +3,13 @@
The micro:bit LED screen
```sim
basic.showString(" ");
basic.showLeds(`
# . # . #
. # . # .
# . # . #
. # . # .
# . # . #
`);
```
The micro:bit LED screen consists of 25 red LED lights arranged in a 5X5 grid (5 LEDs across by 5 LEDs down).
@ -14,15 +20,15 @@ You use ``x , y`` coordinates to specify a particular LED in the grid; where ``x
Here are the x, y coordinates for the LEDs in the 5X5 grid:
`0, 0` `1, 0` `2, 0` `3, 0` `4, 0`
`(0,0)` `(1,0)` `(2,0)` `(3,0)` `(4,0)`
`0, 1` `1, 1` `2, 1` `3, 1` `4, 1`
`(0,1)` `(1,1)` `(2,1)` `(3,1)` `(4,1)`
`0, 2` `1, 2` `2, 2` `3, 2` `4, 2`
`(0,2)` `(1,2)` `(2,2)` `(3,2)` `(4,2)`
`0, 3` `1, 3` `2, 3` `3, 3` `4, 3`
`(0,3)` `(1,3)` `(2,3)` `(3,3)` `(4,3)`
`0, 4` `1, 4` `2, 4` `3, 4` `4, 4`
`(0,4)` `(1,4)` `(2,4)` `(3,4)` `(4,4)`
The x, y coordinates for the LED in the centre of the grid are `2, 2`. Starting from `0, 0` count over 2 columns and then down 2 rows.
@ -35,7 +41,8 @@ Since the row and column numbers start at 0, an easy way to figure out the x, y
Use [plot](/reference/led/plot) and [unplot](/reference/led/unplot) to turn a LED on or off
```blocks
led.plot(0,0)
led.plot(0,0);
basic.pause(1000);
led.unplot(0,0)
```