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@nbogie nbogie/funkyOne.js
Created Nov 29, 2018

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Rough first funky solenoid drummer for micro:bit with adafruit's crickit board. It just plays a hardcoded rhythm with random variation. Needs https://makecode.microbit.com/beta and the adafruit crickit extension.
input.onButtonPressed(Button.A, function () {
playRhythmLooped(funkyDrummer, 16, 90);
})
input.onButtonPressed(Button.B, function () {
for (let i = 0; i < 200; i++) {
driveNum = Math.randomRange(1, 4)
strike(driveNum);
crickit.setPixelColor([16711680, 65280, 255, 16776960][driveNum - 1])
basic.pause(100)
}
})
function noStrike() {
basic.pause(16)
}
function playRhythmOnce(rhythm: number[][], pauseMs: number) {
rhythm.forEach(function (info) {
let drumNumber: number;
if (info.length === 1) {
drumNumber = info[0];
}
else {
drumNumber = Math.randomRange(0, 100) < info[1] ?
info[0] : (info.length === 3 ? info[2] : 0);
}
if (drumNumber > 0) {
strike(drumNumber);
crickit.setPixelColor([80, 16711680, 255, 16776960][drumNumber - 1]);
} else {
noStrike();
//crickit.setPixelOff();
}
basic.pause(pauseMs);
});
}
function playRhythmLooped(rhythm: number[][], numRepeats: number, pauseMs: number) {
for (let r = 0; r < numRepeats; r++) {
playRhythmOnce(rhythm, pauseMs);
}
}
function strike(driveNum: number) {
let d = getDrive(driveNum);
d.analogWrite(1023);
basic.pause(8)
d.analogWrite(0);
basic.pause(8)
}
function getDrive(driveNum: number) {
return [
crickit.drive1,
crickit.drive2,
crickit.drive3,
crickit.drive4][driveNum - 1];
}
function randomDrive() {
return getDrive(Math.randomRange(1, 4));
}
let funkyDrummer: number[][] = [
[2], [1], [2, 50], [1],
[3], [3, 15, 1], [1], [3],
[1], [3], [2], [2, 90],
[3], [1], [1], [3, 30, 1]]
let driveNum = 0
basic.showLeds(`
# # . . .
. . # # .
. . . . .
. # # # #
. # # # #
`)
basic.pause(500);
basic.clearScreen();
[1, 2, 3, 4].forEach(function (dn) { getDrive(dn).setFrequency(1000); });
crickit.setPixelColor(0x008000);
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