Method waitBusy

modules/drivers/it8951/it8951.js:310–322

(timeout)

		this.select.write(1);
	}
	waitBusy(timeout) {
		if (this.busy.read())
			return;

		if (!timeout)
			timeout = 3000;

		const start = Date.now();
		while (!this.busy.read()) {
			if ((Date.now() - start) > timeout)
				throw new Error("time out");
		}
	}
	readWords(result) {
    	this.waitBusy();
    	this.select.write(0);