pxt-calliope/libs/microbit/basic.cpp
2016-04-01 21:26:06 -07:00

129 lines
3.5 KiB
C++

#include "ksbit.h"
/**
* Provides access to basic micro:bit functionality.
*/
//% color=190 weight=100
namespace basic {
/**
* Scroll a number on the screen. If the number fits on the screen (i.e. is a single digit), do not scroll.
* @param interval speed of scroll; eg: 150, 100, 200, -100
*/
//% help=basic/show-number
//% weight=96
//% blockId=device_show_number block="show|number %number" blockGap=8 icon="\uf1ec"
//% async
void showNumber(int value, int interval = 150) {
if (interval < 0)
return;
ManagedString t(value);
if (value < 0 || value >= 10) {
uBit.display.scroll(t, interval);
} else {
uBit.display.print(t.charAt(0), interval * 5);
}
}
/**
* Draws an image on the LED screen.
* @param leds TODO
* @param interval TODO
*/
//% help=basic/show-leds
//% weight=95 blockGap=8
//% imageLiteral=1 async
//% blockId=device_show_leds
//% block="show leds" icon="\uf00a"
void showLeds(ImageLiteral leds, int interval = 400) {
uBit.display.print(MicroBitImage(getbytes(leds)), 0, 0, 0, interval);
}
/**
* Display text on the display, one character at a time. If the string fits on the screen (i.e. is one letter), does not scroll.
* @param text the text to scroll on the screen, eg: "Hello!"
* @param interval how fast to shift characters; eg: 150, 100, 200, -100
*/
//% help=basic/show-string
//% weight=87 blockGap=8
//% block="show|string %text" icon="\uf031"
//% async
//% blockId=device_print_message
void showString(StringData *text, int interval = 150) {
if (interval < 0)
return;
ManagedString s(text);
int l = s.length();
if (l == 0) {
uBit.display.clear();
uBit.sleep(interval * 5);
} else if (l > 1) {
uBit.display.scroll(s, interval);
} else {
uBit.display.print(s.charAt(0), interval * 5);
}
}
/**
* Turn off all LEDs
*/
//% help=basic/clear-screen weight=79
//% blockId=device_clear_display block="clear screen" icon="\uf12d"
void clearScreen() {
uBit.display.image.clear();
}
/**
* Shows a sequence of LED screens as an animation.
* @param leds TODO
* @param interval TODO
*/
//% help=basic/show-animation imageLiteral=1 async
void showAnimation(ImageLiteral leds, int interval = 400) {
uBit.display.animate(MicroBitImage(getbytes(leds)), interval, 5, 0);
}
/**
* Draws an image on the LED screen.
* @param leds TODO
*/
//% help=basic/plot-leds weight=80
void plotLeds(ImageLiteral leds) {
MicroBitImage i(getbytes(leds));
uBit.display.print(i, 0, 0, 0, 0);
}
void forever_stub(void *a) {
while (true) {
action::run((Action)a);
uBit.sleep(20);
}
}
/**
* Repeats the code forever in the background. On each iteration, allows other codes to run.
* @param body TODO
*/
//% help=basic/forever weight=55 blockGap=8
//% blockId=device_forever block="forever" icon="\uf01e"
void forever(Action a) {
if (a != 0) {
incr(a);
create_fiber(forever_stub, (void*)a);
}
}
/**
* Pause for the specified time in milliseconds
* @param ms how long to pause for, eg: 100, 200, 500, 1000, 2000
*/
//% help=basic/pause weight=54
//% async block="pause (ms) %pause"
//% blockId=device_pause icon="\uf110"
void pause(int ms) {
uBit.sleep(ms);
}
}