Method downloadToMemory

tools/xsbug/esptool.js:501–545

(data, offset, entry)

		});
	}
	async downloadToMemory(data, offset, entry) {
		const byteLength = data.byteLength;
		const ESP_RAM_BLOCK = 6 * 1024;
		let blocks = Math.ceil(byteLength / ESP_RAM_BLOCK);

		let payload = new DataView(new ArrayBuffer(4 * 4));
		payload.setUint32(0, byteLength, true);		// little-endian
		payload.setUint32(4, blocks, true);			// little-endian
		payload.setUint32(8, ESP_RAM_BLOCK, true);	// little-endian
		payload.setUint32(12, offset, true);		// little-endian
		await this.command(Bootloader.MEM_BEGIN, payload.buffer);
		let reply = this.parseReply(await this.getReply(), Bootloader.MEM_BEGIN);

		let block = 0;
		while (blocks--) {
			const fragment = data.slice(block * ESP_RAM_BLOCK, (block + 1) * ESP_RAM_BLOCK);
			const checksum = this.espChecksum(fragment);
			payload = new DataView(new ArrayBuffer((4 * 4) + fragment.length));
			payload.setUint32(0, fragment.length, true);// little-endian
			payload.setUint32(4, block, true);			// little-endian
			payload.setUint32(8, 0, true);				// little-endian
			payload.setUint32(12, 0, true);				// little-endian
			payload = new Uint8Array(payload.buffer);
			payload.set(fragment, 16);
			await this.command(Bootloader.MEM_DATA, payload, checksum);
			reply = this.parseReply(await this.getReply(Math.floor(50 + (fragment.length/(this.#baud / 10) * 1000))), Bootloader.MEM_DATA);
			block += 1;
		}

		if (entry) {
			payload = new DataView(new ArrayBuffer(2 * 4));
			payload.setUint32(0, 0, true);			// little-endian
			payload.setUint32(4, entry, true);		// little-endian

			await this.command(Bootloader.MEM_END, new Uint8Array(payload.buffer));
			reply = await this.getReply(50, true);
			if (!this.parseReply(reply, Bootloader.MEM_END))
				throw new Error("stub download failed");
			let s = "";
			for (let i = 0; i < reply.length; i++)
				s += String.fromCharCode(reply[i]);
			if (s.indexOf("OHAI") < 0)
				throw new Error("Stub loader didn't reply");
		}
	}
	async deployStub(stub) {
		await this.downloadToMemory(stub.text, stub.text_start);
		await this.downloadToMemory(stub.data, stub.data_start, stub.entry);