【背景】
之前已经利用并修改原先的：
然后实现了，支持HART协议，从某Android PAD经过USB OTG转接头和HART猫，最终连通了某HART设备：
可以用DigiView抓取出对应的RTS，CTS等信号，实现了HART的硬件通讯了。
且之前已整理了一点资料：
【整理】Android平台下的FTDI的USB转串口(Serial, CDC)驱动
但是关于移植细节，并没记录。
现直接贴出代码，供参考：
（1）代码文件：
/UsbSerialLibrary/src/com/hoho/android/usbserial/driver/FtdiSerialDriver.java
修改后的源码：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 | /* Copyright 2011 Google Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * Project home page: http://code.google.com/p/usb-serial-for-android/ */ package com.hoho.android.usbserial.driver; import android.hardware.usb.UsbConstants;import android.hardware.usb.UsbDevice;import android.hardware.usb.UsbDeviceConnection;import android.hardware.usb.UsbEndpoint;import android.hardware.usb.UsbRequest;import android.util.Log; import com.hoho.android.usbserial.util.HexDump; import java.io.IOException;import java.nio.ByteBuffer;import java.util.LinkedHashMap;import java.util.Map; /** * A {@link CommonUsbSerialDriver} implementation for a variety of FTDI devices * <p> * This driver is based on * <a href="http://www.intra2net.com/en/developer/libftdi">libftdi</a>, and is * copyright and subject to the following terms: * * <pre> * Copyright (C) 2003 by Intra2net AG * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License * version 2.1 as published by the Free Software Foundation; * * opensource@intra2net.com * </pre> * * </p> * <p> * Some FTDI devices have not been tested; see later listing of supported and * unsupported devices. Devices listed as "supported" support the following * features: * <ul> * <li>Read and write of serial data (see {@link #read(byte[], int)} and * {@link #write(byte[], int)}. * <li>Setting baud rate (see {@link #setBaudRate(int)}). * </ul> * </p> * <p> * Supported and tested devices: * <ul> * <li>{@value DeviceType#TYPE_R}</li> * </ul> * </p> * <p> * Unsupported but possibly working devices (please contact the author with * feedback or patches): * <ul> * <li>{@value DeviceType#TYPE_2232C}</li> * <li>{@value DeviceType#TYPE_2232H}</li> * <li>{@value DeviceType#TYPE_4232H}</li> * <li>{@value DeviceType#TYPE_AM}</li> * <li>{@value DeviceType#TYPE_BM}</li> * </ul> * </p> * * @author mike wakerly (opensource@hoho.com) * @see <a href="http://code.google.com/p/usb-serial-for-android/">USB Serial * for Android project page</a> * @see <a href="http://www.ftdichip.com/">FTDI Homepage</a> * @see <a href="http://www.intra2net.com/en/developer/libftdi">libftdi</a> */public class FtdiSerialDriver extends CommonUsbSerialDriver { private static final int DEFAULT_BAUD_RATE = 115200; private static final int DEFAULT_DATA_BITS = DATABITS_8; private static final int DEFAULT_PARITY = PARITY_NONE; private static final int DEFAULT_STOP_BITS = STOPBITS_1; public static final int USB_TYPE_STANDARD = 0x00 << 5; public static final int USB_TYPE_CLASS = 0x00 << 5; public static final int USB_TYPE_VENDOR = 0x00 << 5; public static final int USB_TYPE_RESERVED = 0x00 << 5; public static final int USB_RECIP_DEVICE = 0x00; public static final int USB_RECIP_INTERFACE = 0x01; public static final int USB_RECIP_ENDPOINT = 0x02; public static final int USB_RECIP_OTHER = 0x03; public static final int USB_ENDPOINT_IN = 0x80; public static final int USB_ENDPOINT_OUT = 0x00; public static final int USB_WRITE_TIMEOUT_MILLIS = 5000; public static final int USB_READ_TIMEOUT_MILLIS = 5000; /* * add support for RTS and DTR, by Crifan Li */ private boolean mRts = false; private boolean mDtr = false; //http://asf.atmel.com/docs/2.9.0/avr32.services.usb.cdc.example.evk1100.asfv1/html/cdc_8h_source.html private static final int SEND_ENCAPSULATED_COMMAND = 0x00; private static final int GET_ENCAPSULATED_COMMAND = 0x01; /** * Set_Line_Coding * * Unload the line coding structure (7 bytes) sent in the data stage. * Apply this setting to the UART * Flush the communication buffer * * Line Coding Structure (7 bytes) * 0-3 dwDTERate Data terminal rate (baudrate), in bits per second (LSB first) * 4 bCharFormat Stop bits: 0 - 1 Stop bit, 1 - 1.5 Stop bits, 2 - 2 Stop bits * 5 bParityType Parity: 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space * 6 bDataBits Data bits: 5, 6, 7, 8, 16 */ private static final int SET_LINE_CODING = 0x20; // USB CDC 1.1 section 6.2 /** * Get_Line_Coding * * Return the line coding structure */ private static final int GET_LINE_CODING = 0x21; /** * Set_ControlLine_State * * Set/reset RTS/DTR according to wValue * wValue * bit 1 RTS * bit 0 DTR */ private static final int SET_CONTROL_LINE_STATE = 0x22; /** * Send_Break * * Send break from UART TX port, for wValue (msec) duration. * wValue * 0xFFFF: continuous break * 0x0000: stop break */ private static final int SEND_BREAK = 0x23; //SET_CONTROL_LINE_STATE bit fields public static final int SET_CONTROL_LINE_BITS_DTR = 0x01 << 0; //bit0 public static final int SET_CONTROL_LINE_BITS_RTS = 0x01 << 1; //bit1 //private static final int USB_RECIP_INTERFACE = 0x01; //refer: //http://www.cs.fsu.edu/~baker/devices/lxr/http/source/linux/drivers/usb/class/cdc-acm.h#L28 //#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE) private static final int USB_RT_FDTI = UsbConstants.USB_TYPE_CLASS | USB_RECIP_INTERFACE; //add explain by Crifan Li //following definition is from //libftdi1-1.0.tar\libftdi1-1.0\libftdi1-1.0\src\ftdi.h //which is downloaded from: private static final int SIO_SET_DTR_MASK = 0x1; private static final int SIO_SET_DTR_HIGH =( 1 | ( SIO_SET_DTR_MASK << 8)); private static final int SIO_SET_DTR_LOW =( 0 | ( SIO_SET_DTR_MASK << 8)); private static final int SIO_SET_RTS_MASK = 0x2; private static final int SIO_SET_RTS_HIGH =( 2 | ( SIO_SET_RTS_MASK << 8 )); private static final int SIO_SET_RTS_LOW =( 0 | ( SIO_SET_RTS_MASK << 8 )); // From ftdi.h /** * Reset the port. */ private static final int SIO_RESET_REQUEST = 0; /** * Set the modem control register. */ private static final int SIO_SET_MODEM_CTRL_REQUEST = 1; /** * Set flow control register. */ private static final int SIO_SET_FLOW_CTRL_REQUEST = 2; /** * Set baud rate. */ private static final int SIO_SET_BAUD_RATE_REQUEST = 3; /** * Set the data characteristics of the port. */ private static final int SIO_SET_DATA_REQUEST = 4; private static final int SIO_RESET_SIO = 0; public static final int FTDI_DEVICE_OUT_REQTYPE = UsbConstants.USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT; public static final int FTDI_DEVICE_IN_REQTYPE = UsbConstants.USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN; /** * Length of the modem status header, transmitted with every read. */ private static final int MODEM_STATUS_HEADER_LENGTH = 2; private final String TAG = FtdiSerialDriver.class.getSimpleName(); private DeviceType mType; /** * FTDI chip types. */ private static enum DeviceType { TYPE_BM, TYPE_AM, TYPE_2232C, TYPE_R, TYPE_2232H, TYPE_4232H; } private int mInterface = 0; /* INTERFACE_ANY */ private int mMaxPacketSize = 64; // TODO(mikey): detect private int mBaudRate; private int mDataBits; private int mParity; private int mStopBits; /** * Due to http://b.android.com/28023 , we cannot use UsbRequest async reads * since it gives no indication of number of bytes read. Set this to * {@code true} on platforms where it is fixed. */ private static final boolean ENABLE_ASYNC_READS = false; /** * Constructor. * * @param usbDevice the {@link UsbDevice} to use * @param usbConnection the {@link UsbDeviceConnection} to use * @throws UsbSerialRuntimeException if the given device is incompatible * with this driver */ public FtdiSerialDriver(UsbDevice usbDevice, UsbDeviceConnection usbConnection) { super(usbDevice, usbConnection); mType = null; } public void reset() throws IOException { int result = mConnection.controlTransfer(FTDI_DEVICE_OUT_REQTYPE, SIO_RESET_REQUEST, SIO_RESET_SIO, 0 /* index */, null, 0, USB_WRITE_TIMEOUT_MILLIS); if (result != 0) { throw new IOException("Reset failed: result=" + result); } // TODO(mikey): autodetect. mType = DeviceType.TYPE_R; } @Override public void open() throws IOException { boolean opened = false; try { for (int i = 0; i < mDevice.getInterfaceCount(); i++) { if (mConnection.claimInterface(mDevice.getInterface(i), true)) { Log.d(TAG, "claimInterface " + i + " SUCCESS"); } else { Log.d(TAG, "claimInterface " + i + " FAIL"); } } reset(); setParameters(DEFAULT_BAUD_RATE, DEFAULT_DATA_BITS, DEFAULT_STOP_BITS, DEFAULT_PARITY); opened = true; } finally { if (!opened) { close(); } } } @Override public void close() { mConnection.close(); } @Override public int read(byte[] dest, int timeoutMillis) throws IOException { final UsbEndpoint endpoint = mDevice.getInterface(0).getEndpoint(0); if (ENABLE_ASYNC_READS) { final int readAmt; synchronized (mReadBufferLock) { // mReadBuffer is only used for maximum read size. readAmt = Math.min(dest.length, mReadBuffer.length); } final UsbRequest request = new UsbRequest(); request.initialize(mConnection, endpoint); final ByteBuffer buf = ByteBuffer.wrap(dest); if (!request.queue(buf, readAmt)) { throw new IOException("Error queueing request."); } final UsbRequest response = mConnection.requestWait(); if (response == null) { throw new IOException("Null response"); } final int payloadBytesRead = buf.position() - MODEM_STATUS_HEADER_LENGTH; if (payloadBytesRead > 0) { Log.d(TAG, HexDump.dumpHexString(dest, 0, Math.min(32, dest.length))); return payloadBytesRead; } else { return 0; } } else { final int totalBytesRead; synchronized (mReadBufferLock) { final int readAmt = Math.min(dest.length, mReadBuffer.length); totalBytesRead = mConnection.bulkTransfer(endpoint, mReadBuffer, readAmt, timeoutMillis); } if (totalBytesRead < MODEM_STATUS_HEADER_LENGTH) { throw new IOException("Expected at least " + MODEM_STATUS_HEADER_LENGTH + " bytes"); } final int payloadBytesRead = totalBytesRead - MODEM_STATUS_HEADER_LENGTH; if (payloadBytesRead > 0) { System.arraycopy(mReadBuffer, MODEM_STATUS_HEADER_LENGTH, dest, 0, payloadBytesRead); } return payloadBytesRead; } } @Override public int write(byte[] src, int timeoutMillis) throws IOException { final UsbEndpoint endpoint = mDevice.getInterface(0).getEndpoint(1); int offset = 0; while (offset < src.length) { final int writeLength; final int amtWritten; synchronized (mWriteBufferLock) { final byte[] writeBuffer; writeLength = Math.min(src.length - offset, mWriteBuffer.length); if (offset == 0) { writeBuffer = src; } else { // bulkTransfer does not support offsets, make a copy. System.arraycopy(src, offset, mWriteBuffer, 0, writeLength); writeBuffer = mWriteBuffer; } amtWritten = mConnection.bulkTransfer(endpoint, writeBuffer, writeLength, timeoutMillis); } if (amtWritten <= 0) { throw new IOException("Error writing " + writeLength + " bytes at offset " + offset + " length=" + src.length); } Log.d(TAG, "Wrote amtWritten=" + amtWritten + " attempted=" + writeLength); offset += amtWritten; } return offset; } @Override @Deprecated public int setBaudRate(int baudRate) throws IOException { long[] vals = convertBaudrate(baudRate); long actualBaudrate = vals[0]; long index = vals[1]; long value = vals[2]; int result = mConnection.controlTransfer(FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BAUD_RATE_REQUEST, (int) value, (int) index, null, 0, USB_WRITE_TIMEOUT_MILLIS); if (result != 0) { throw new IOException("Setting baudrate failed: result=" + result); } return (int) actualBaudrate; } @Override public void setParameters(int baudRate, int dataBits, int stopBits, int parity) throws IOException { mBaudRate = setBaudRate(baudRate); int config = dataBits; switch (parity) { case PARITY_NONE: config |= (0x00 << 8); break; case PARITY_ODD: config |= (0x01 << 8); break; case PARITY_EVEN: config |= (0x02 << 8); break; case PARITY_MARK: config |= (0x03 << 8); break; case PARITY_SPACE: config |= (0x04 << 8); break; default: throw new IllegalArgumentException("Unknown parity value: " + parity); } switch (stopBits) { case STOPBITS_1: config |= (0x00 << 11); break; case STOPBITS_1_5: config |= (0x01 << 11); break; case STOPBITS_2: config |= (0x02 << 11); break; default: throw new IllegalArgumentException("Unknown stopBits value: " + stopBits); } int result = mConnection.controlTransfer(FTDI_DEVICE_OUT_REQTYPE, SIO_SET_DATA_REQUEST, config, 0 /* index */, null, 0, USB_WRITE_TIMEOUT_MILLIS); if (result != 0) { throw new IOException("Setting parameters failed: result=" + result); } mParity = parity; mStopBits = stopBits; mDataBits = dataBits; } private long[] convertBaudrate(int baudrate) { // TODO(mikey): Braindead transcription of libfti method. Clean up, // using more idiomatic Java where possible. int divisor = 24000000 / baudrate; int bestDivisor = 0; int bestBaud = 0; int bestBaudDiff = 0; int fracCode[] = { 0, 3, 2, 4, 1, 5, 6, 7 }; for (int i = 0; i < 2; i++) { int tryDivisor = divisor + i; int baudEstimate; int baudDiff; if (tryDivisor <= 8) { // Round up to minimum supported divisor tryDivisor = 8; } else if (mType != DeviceType.TYPE_AM && tryDivisor < 12) { // BM doesn't support divisors 9 through 11 inclusive tryDivisor = 12; } else if (divisor < 16) { // AM doesn't support divisors 9 through 15 inclusive tryDivisor = 16; } else { if (mType == DeviceType.TYPE_AM) { // TODO } else { if (tryDivisor > 0x1FFFF) { // Round down to maximum supported divisor value (for // BM) tryDivisor = 0x1FFFF; } } } // Get estimated baud rate (to nearest integer) baudEstimate = (24000000 + (tryDivisor / 2)) / tryDivisor; // Get absolute difference from requested baud rate if (baudEstimate < baudrate) { baudDiff = baudrate - baudEstimate; } else { baudDiff = baudEstimate - baudrate; } if (i == 0 || baudDiff < bestBaudDiff) { // Closest to requested baud rate so far bestDivisor = tryDivisor; bestBaud = baudEstimate; bestBaudDiff = baudDiff; if (baudDiff == 0) { // Spot on! No point trying break; } } } // Encode the best divisor value long encodedDivisor = (bestDivisor >> 3) | (fracCode[bestDivisor & 7] << 14); // Deal with special cases for encoded value if (encodedDivisor == 1) { encodedDivisor = 0; // 3000000 baud } else if (encodedDivisor == 0x4001) { encodedDivisor = 1; // 2000000 baud (BM only) } // Split into "value" and "index" values long value = encodedDivisor & 0xFFFF; long index; if (mType == DeviceType.TYPE_2232C || mType == DeviceType.TYPE_2232H || mType == DeviceType.TYPE_4232H) { index = (encodedDivisor >> 8) & 0xffff; index &= 0xFF00; index |= 0 /* TODO mIndex */; } else { index = (encodedDivisor >> 16) & 0xffff; } // Return the nearest baud rate return new long[] { bestBaud, index, value }; } @Override public boolean getCD() throws IOException { return false; } @Override public boolean getCTS() throws IOException { return false; } @Override public boolean getDSR() throws IOException { return false; } @Override public boolean getDTR() throws IOException { return mDtr; //return false; } @Override public void setDTR(boolean value) throws IOException { mDtr = value; setDtrRts(); } @Override public boolean getRI() throws IOException { return false; } @Override public boolean getRTS() throws IOException { return mRts; //return false; } private void setDtrRts() { short usb_val = 0; if (mDtr) { usb_val = SIO_SET_DTR_HIGH; } else { usb_val = SIO_SET_DTR_LOW; } if (mRts) { usb_val |= SIO_SET_RTS_HIGH; } else { usb_val |= SIO_SET_RTS_LOW; } //sendFdtiControlMessage(SET_CONTROL_LINE_STATE, usb_val, null); //refer //(1) http://developer.android.com/intl/zh-CN/reference/android/hardware/usb/UsbDeviceConnection.html#controlTransfer%28int,%20int,%20int,%20int,%20byte[],%20int,%20int%29 //(2) mConnection.controlTransfer in setParameters() //(3) //int ftdi_setdtr(struct ftdi_context *ftdi, int state) in //int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts) //in //libftdi1-1.0.tar\libftdi1-1.0\libftdi1-1.0\src\ftdi.c mConnection.controlTransfer( FTDI_DEVICE_OUT_REQTYPE, SIO_SET_MODEM_CTRL_REQUEST, /* Set the modem control register */ usb_val, /* clear/set RTS/DTR */ 0,/* index */ null, /* buffer is null */ 0, /* length is 0 for null buffer */ USB_WRITE_TIMEOUT_MILLIS /* timeout in millisecond */ ); } @Override public void setRTS(boolean value) throws IOException { mRts = value; setDtrRts(); // short usb_val = 0;// if (mRts)// {// usb_val = SIO_SET_RTS_HIGH;// }// else// {// usb_val = SIO_SET_RTS_LOW;// }// // mConnection.controlTransfer(// FTDI_DEVICE_OUT_REQTYPE,// SIO_SET_MODEM_CTRL_REQUEST, /* Set the modem control register */// usb_val, /* clear/set RTS/DTR */// 0,/* index */// null, /* buffer is null */// 0, /* length is 0 for null buffer */// USB_WRITE_TIMEOUT_MILLIS /* timeout in millisecond */// ); } public static Map<Integer, int[]> getSupportedDevices() { final Map<Integer, int[]> supportedDevices = new LinkedHashMap<Integer, int[]>(); supportedDevices.put(Integer.valueOf(UsbId.VENDOR_FTDI), new int[] { UsbId.FTDI_FT232R, }); return supportedDevices; } } |
一些解释说明：
1.下载驱动源码
主要是利用其：
2.下载参考源码
从：
http://www.intra2net.com/en/developer/libftdi/
下载到所参考的源码：
http://www.intra2net.com/en/developer/libftdi/download/libftdi1-1.0.tar.bz2
3.供参考的一些页面：
https://github.com/mik3y/usb-serial-for-android
http://asf.atmel.com/docs/2.9.0/avr32.services.usb.cdc.example.evk1100.asfv1/html/cdc_8h_source.html
http://www.lvr.com/usb_virtual_com_port.htm
http://www.cs.fsu.edu/~baker/devices/lxr/http/source/linux/drivers/usb/class/cdc-acm.h#L28
转载请注明：在路上 » 【整理】移植FTDI的FT232R的USB转串口驱动到Android平台以支持RTS，DTR等功能以便支持HART硬件通讯