148 lines
4.1 KiB
TypeScript
148 lines
4.1 KiB
TypeScript
/**
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* Control of the LED screen.
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*/
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//% color=#8169E6 weight=97
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namespace led {
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// what's the current high value
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let barGraphHigh = 0;
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// when was the current high value recorded
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let barGraphHighLast = 0;
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/**
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* Displays a vertical bar graph based on the `value` and `high` value.
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* If `high` is 0, the chart gets adjusted automatically.
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* @param value current value to plot
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* @param high maximum value. If 0, maximum value adjusted automatically, eg: 0
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*/
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//% help=led/plot-bar-graph weight=20
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//% blockId=device_plot_bar_graph block="plot bar graph of %value up to %high" icon="\uf080" blockExternalInputs=true
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//% parts="ledmatrix"
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export function plotBarGraph(value: number, high: number): void {
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const now = input.runningTime();
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console.logValue("", value);
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value = Math.abs(value);
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// auto-scale "high" is not provided
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if (high > 0) {
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barGraphHigh = high;
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} else if (value > barGraphHigh || now - barGraphHighLast > 10000) {
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barGraphHigh = value;
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barGraphHighLast = now;
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}
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// normalize lack of data to 0..1
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if (barGraphHigh < 16 * Number.EPSILON)
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barGraphHigh = 1;
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// normalize value to 0..1
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const v = value / barGraphHigh;
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const dv = 1 / 16;
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let k = 0;
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for (let y = 4; y >= 0; --y) {
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for (let x = 0; x < 3; ++x) {
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if (k > v) {
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unplot(2 - x, y);
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unplot(2 + x, y);
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} else {
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plot(2 - x, y);
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plot(2 + x, y);
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}
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k += dv;
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}
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}
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}
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/**
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* Toggles a particular pixel
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* @param x pixel column
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* @param y pixel row
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*/
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//% help=led/toggle weight=77
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//% blockId=device_led_toggle block="toggle|x %x|y %y" icon="\uf204" blockGap=8
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//% parts="ledmatrix"
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//% x.min=0 x.max=4 y.min=0 y.max=4
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//% x.fieldOptions.precision=1 y.fieldOptions.precision=1
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export function toggle(x: number, y: number): void {
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if (led.point(x, y)) {
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led.unplot(x, y);
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} else {
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led.plot(x, y);
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}
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}
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/**
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* Turns all LEDS on
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*/
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//% help=led/plot-all
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//% parts="ledmatrix"
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export function plotAll(): void {
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for (let i = 0; i < 5; i++) {
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for (let j = 0; j < 5; j++) {
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led.plot(i, j);
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}
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}
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}
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/**
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* Inverts the current LED display
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*/
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//% help=led/toggle-all
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//% parts="ledmatrix"
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export function toggleAll(): void {
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for (let i = 0; i < 5; i++) {
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for (let j = 0; j < 5; j++) {
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led.toggle(i, j);
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}
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}
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}
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/**
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* Fades in the screen display.
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* @param ms fade time in milleseconds
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*/
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//% help=led/fade-in
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//% parts="ledmatrix"
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export function fadeIn(ms: number = 700): void {
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if (ms < 20) {
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led.setBrightness(255);
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return;
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}
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let dt = 50;
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let brightness = led.brightness();
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let start = input.runningTime();
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let elapsed = 0;
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while (elapsed < ms) {
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led.setBrightness(brightness + ((255 - brightness) * elapsed) / ms);
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basic.pause(dt);
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elapsed = input.runningTime() - start;
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}
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led.setBrightness(255);
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}
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/**
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* Fades out the screen brightness.
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* @param ms fade time in milliseconds
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*/
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//% help=led/fade-out
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//% parts="ledmatrix"
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export function fadeOut(ms: number = 700): void {
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if (ms < 20) {
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led.setBrightness(0);
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return;
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}
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let brightness = led.brightness();
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let dt = 50;
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let start = input.runningTime();
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let elapsed = 0;
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while (elapsed < ms) {
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led.setBrightness(brightness - (brightness * elapsed) / ms);
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basic.pause(dt);
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elapsed = input.runningTime() - start;
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}
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led.setBrightness(0);
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}
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}
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