274 lines
6.1 KiB
Markdown
274 lines
6.1 KiB
Markdown
# Getting started
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Are you ready to build cool BBC micro:bit programs?
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Here are some challenges for you. Unscramble the blocks in the editor
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to make real programs that work!
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### Happy face
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There are three blocks in the editor (the area to the left).
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They should look like this:
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```blocks
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basic.forever(() => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`)
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basic.showLeds(`
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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`)
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});
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```
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When you run this program, you will see a smiley face, then a blank
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screen, then a smiley again -- it never stops! (That's because of the
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``forever`` block.)
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To move your program from your computer to the BBC micro:bit:
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* Connect your micro:bit to the computer with the USB cable.
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* Click **Compile**.
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* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
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* Wait until the yellow light stops blinking!
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### Happy unhappy face
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Draw an unhappy face instead of the blank screen. Click on the dots
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in the second ``show leds`` block until it matches the blocks below.
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Now you have an **animation** (cartoon) that shows a happy face,
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then an unhappy one, then a happy one again, forever (or until
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you turn off your micro:bit)!
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```blocks
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basic.forever(() => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`)
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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. # # # .
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# . . . #
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`)
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});
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```
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To move your program from your computer to the BBC micro:bit:
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* Connect your micro:bit to the computer with the USB cable.
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* Click **Compile**.
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* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
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* Wait until the yellow light stops blinking!
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### Your turn!
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Pile up more ``show leds`` blocks to create your animation! Create an
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animation with at least 5 pictures. What does this animation show?
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```blocks
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basic.forever(() => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`)
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# # # # #
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. . . . .
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`)
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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. # # # .
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# . . . #
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`)
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# # # # #
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. . . # #
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`)
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basic.showLeds(`
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. . . . .
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# . # . .
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. . . . .
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# . . . #
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. # # # .
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`)
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basic.showLeds(`
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. . . . .
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. . # . #
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. . . . .
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# . . . #
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. # # # .
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`)
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});
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```
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To move your program from your computer to the BBC micro:bit:
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* Connect your micro:bit to the computer with the USB cable.
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* Click **Compile**.
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* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
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* Wait until the yellow light stops blinking!
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#### ~hint
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You can find the ``show leds`` block in the **Basic** part of the editor.
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#### ~
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### Button A and button B
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This program will show the word **anteater** on the LED
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screen when you press button `A`.
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```blocks
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input.onButtonPressed(Button.A, () => {
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basic.showString("anteater");
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});
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```
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#### ~hint
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The ``showString`` block can show letters, numbers, and punctuation
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on the micro:bit screen.
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#### ~
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Now try to unscramble these blocks in the editor so that the micro:bit
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shows **banana** when you press button `B`.
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```shuffle
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input.onButtonPressed(Button.B, () => {
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basic.showString("banana");
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});
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```
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#### ~hint
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You can find the letter `B` by clicking the letter `A` on the
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``onButtonPressed`` block.
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#### ~
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#### Your turn!
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Can you combine these blocks so your program shows your real name
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instead of **anteater** when you press `A`, but _your secret agent
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name_ instead of **banana** when you press `B`?
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### Shake
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You can find when someone is shaking the BBC micro:bit by checking its
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**accelerometer** (it finds whether the micro:bit is speeding up or
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slowing down).
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Unscramble these blocks in the editor to show a frownie when someone
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shakes the micro:bit. (Ouch!)
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```shuffle
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input.onGesture(Gesture.Shake, () => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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. # # # .
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# . . . #`);
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});
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```
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### Tilting with gestures
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You can also find when someone is tilting the micro:bit left or right,
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face up or face down, and logo up or logo down (the logo is the yellow
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oval picture at the top of the board). Tilting a micro:bit like this
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is called a **gesture**.
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Try to build a Rock Paper Scissors game where you tilt the micro:bit
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left to show paper, right to show scissors, and down to show rock.
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Unscramble these blocks in the editor and try this program on a real
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micro:bit!
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```shuffle
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input.onGesture(Gesture.TiltLeft, () => {
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basic.showLeds(`
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# # # # #
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# . . . #
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# . . . #
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# . . . #
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# # # # #`);
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});
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input.onGesture(Gesture.LogoDown, () => {
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basic.showLeds(`
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. . . . .
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. # # # .
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. # # # .
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. # # # .
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. . . . .`);
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});
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input.onGesture(Gesture.TiltRight, () => {
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basic.showLeds(`
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# # . . #
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# # . # .
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. . # . .
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# # . # .
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# # . . #`);
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});
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```
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### Pins
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You can also use the pins as buttons. (The pins are the holes in the
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metal stripe at the bottom of the micro:bit board.) For example, hold
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the ``GND`` button with one hand and touch the ``0`` pin (called
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``P0``) with your other hand to tell the micro:bit you're pressing it.
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Unscramble the blocks in the editor to show a smiley when you press
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pin ``P0``.
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```shuffle
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input.onPinPressed(TouchPin.P0, () => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# . . . #
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. # # # .`);
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});
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```
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### Your turn!
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Use the screen, buttons, gestures, and pins to make your own fun game
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with the BBC micro:bit! What about some of these?
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* A backpack burglar alarm
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* Daily news broadcaster for your class
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* Animated jewelry
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* A _complete_ animated cartoon
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* A calculator
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* A music box
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These are all things you can make with the BBC micro:bit by itself.
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Just think what you can do if you connect the micro:bit's pins to
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extra parts like microphones and other **sensors**!
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