Method erase

tools/xsbug/esptool.js:288–304

(offset, size)

		this.#serial.set({DTR: false, RTS: false});
	}
	async erase(offset, size) {
		if ((undefined === offset) && (undefined === size)) {
			await this.command(Bootloader.ERASE_FLASH);
			this.parseReply(await this.getReply(120 * 1000), Bootloader.ERASE_FLASH);
			return;
		}

		if ((offset % 4096) || (size % 4096))
			throw new Error("must be aligned to sectors");

		const payload = new DataView(new ArrayBuffer(2 * 4));
		payload.setUint32(0, offset, 1);
		payload.setUint32(4, size, 1);
		const timeout = Math.max(100, 50 + (size / 1_000_000) * 30_000);		// 30 seconds per MB
		await this.command(Bootloader.ERASE_REGION, new Uint8Array(payload.buffer));
		this.parseReply(await this.getReply(timeout), Bootloader.ERASE_REGION);
	}
	async read(offset, size) {
		const result = new Uint8Array(size);
		let position = 0;