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