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better music support

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This commit is contained in:
Peli de Halleux
2016-03-14 08:32:02 -07:00
parent 53c3b22c1c
commit 4cd222ec82
4 changed files with 36 additions and 8 deletions
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29
sim/libmbit.ts
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@ -322,6 +322,8 @@ namespace ks.rt.micro_bit {
export function setAnalogPeriodUs(pin: Pin, micros:number) {
pin.mode = PinMode.Analog | PinMode.Output;
pin.period = micros;
board().updateView();
}
export function servoWritePin(pin: Pin, value: number) {
@ -385,16 +387,33 @@ namespace ks.rt.micro_bit {
}
export function enablePitch(pin: Pin) {
pin.mode = PinMode.Analog | PinMode.Output;
pin.mode = PinMode.Analog | PinMode.Output | PinMode.Pitch;
}
export function pitch(frequency: number, ms: number) {
// update analog output
let pin = board().pins.filter(pin => !!pin && (pin.mode & PinMode.Pitch) != 0)[0] || board().pins[0];
if (frequency <= 0) {
pin.value = 0;
pin.period = 0;
} else {
pin.value = 512;
pin.period = 1000000/frequency;
}
board().updateView();
let cb = getResume();
AudioContextManager.tone(frequency, 1);
setTimeout(() => {
if (ms > 0) AudioContextManager.stop();
cb()
}, ms);
if (ms <= 0) cb();
else {
setTimeout(() => {
AudioContextManager.stop();
pin.value = 0;
pin.period = 0;
board().updateView();
cb()
}, ms);
}
}