1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.chromium.latency.walt.programmer; 18 19 import android.content.Context; 20 import android.os.Handler; 21 import android.util.Log; 22 23 import org.chromium.latency.walt.R; 24 import org.chromium.latency.walt.SimpleLogger; 25 import org.chromium.latency.walt.WaltConnection; 26 27 import java.io.InputStream; 28 import java.text.ParseException; 29 import java.util.Arrays; 30 31 public class Programmer { 32 private static final String TAG = "Programmer"; 33 private SimpleLogger logger; 34 35 private FirmwareImage image; 36 private BootloaderConnection conn; 37 38 private Context context; 39 private Handler handler = new Handler(); 40 41 public Programmer(Context context) { 42 this.context = context; 43 } 44 45 public void program() { 46 logger = SimpleLogger.getInstance(context); 47 InputStream in = context.getResources().openRawResource(R.raw.walt); 48 image = new FirmwareImage(); 49 try { 50 image.parseHex(in); 51 } catch (ParseException e) { 52 Log.e(TAG, "Parsing input file: ", e); 53 } 54 55 conn = BootloaderConnection.getInstance(context); 56 // TODO: automatically reboot into the bootloader 57 logger.log("\nRemember to press the button on the Teensy first\n"); 58 conn.setConnectionStateListener(new WaltConnection.ConnectionStateListener() { 59 @Override 60 public void onConnect() { 61 handler.post(programRunnable); 62 } 63 64 @Override 65 public void onDisconnect() {} 66 }); 67 if (!conn.isConnected()) { 68 conn.connect(); 69 } 70 } 71 72 private Runnable programRunnable = new Runnable() { 73 @Override 74 public void run() { 75 logger.log("Programming..."); 76 77 // The logic for this is ported from 78 // https://github.com/PaulStoffregen/teensy_loader_cli 79 byte[] buf = new byte[DeviceConstants.BLOCK_SIZE + 64]; 80 for (int addr = 0; addr < DeviceConstants.FIRMWARE_SIZE; 81 addr += DeviceConstants.BLOCK_SIZE) { 82 if (!image.shouldWrite(addr, DeviceConstants.BLOCK_SIZE) && addr != 0) 83 continue; // don't need to flash this block 84 85 buf[0] = (byte) (addr & 255); 86 buf[1] = (byte) ((addr >>> 8) & 255); 87 buf[2] = (byte) ((addr >>> 16) & 255); 88 Arrays.fill(buf, 3, 64, (byte) 0); 89 image.getData(buf, 64, addr, DeviceConstants.BLOCK_SIZE); 90 91 conn.write(buf, (addr == 0) ? 3000 : 250); 92 } 93 94 logger.log("Programming complete. Rebooting."); 95 96 // reboot the device 97 buf[0] = (byte) 0xFF; 98 buf[1] = (byte) 0xFF; 99 buf[2] = (byte) 0xFF; 100 Arrays.fill(buf, 3, DeviceConstants.BLOCK_SIZE + 64, (byte) 0); 101 conn.write(buf, 250); 102 } 103 }; 104 } 105
