Android ADK，PC作为USB主机，带libusb，批量传输错误

我正试图使我的电脑成为安卓2.3.4设备的USB主机，以便能够在不需要实际“附件”的情况下开发API。为此，我需要将PC设置为USB主机和“设备”（在我的例子中，是运行2.3.4的NexusOne）

我从作为PC端基础的libusb代码开始，在Android端使用DemoKit代码和Android文档

两者似乎可以很好地协商连接，接口被“声明”，但在批量传输的实际尝试中死亡。在OSX上，错误为-5（未找到LIBUSB_错误），在Ubuntu Linux上（作为root用户），错误为-1（LIBUSB_错误）。（每个版本的最新版本都包含最新的libusb1.0.8）

这是密码。欢迎对问题发表其他评论，尽管这主要是概念证明，所以我只是想寻找批量传输不起作用的原因：

#include <stdio.h>
#include <libusb.h>
#include <string.h>

#define ENDPOINT_BULK_IN 0x83
#define ENDPOINT_BULK_OUT 0x03 // Have tried 0x00, 0x01 and 0x02

#define VID 0x18D1
#define PID 0x4E11

#define ACCESSORY_PID 0x2D00
#define ACCESSORY_ADB_PID 0x2D01 // Can't get this to work, if ADB is active, can't get handle on device

/*
ON OSX
gcc adktest.c -I/usr/local/include -o adktest -lusb-1.0.0 -I/usr/local/include -I/usr/local/include/libusb-1.0
ON UBUNTU
gcc adktest.c -I/usr/include -o adktest -lusb-1.0 -I/usr/include -I/usr/include/libusb-1.0

Testing on Nexus One with Gingerbread 2.3.4
*/

static int transferTest();
static int init(void);
static int shutdown(void);
static void error(int code);
static void status(int code);
static int setupAccessory(
const char* manufacturer,
const char* modelName,
const char* description,
const char* version,
const char* uri,
const char* serialNumber);

//static
static struct libusb_device_handle* handle;

int main (int argc, char *argv[]){
if(init() < 0)
    return;

if(setupAccessory(
    "PCHost",
    "PCHost1",
    "Description",
    "1.0",
    "http://www.mycompany.com",
    "SerialNumber") < 0){
    fprintf(stdout, "Error setting up accessory\n");
    shutdown();
    return -1;
};
if(transferTest() < 0){
    fprintf(stdout, "Error in transferTest\n");
    shutdown();
    return -1;
}   
shutdown();
fprintf(stdout, "Finished\n");
return 0;
}

static int transferTest(){
  // TEST BULK IN/OUT
  const static int PACKET_BULK_LEN=64;
  const static int TIMEOUT=5000;
  int r,i;
  int transferred;
  char answer[PACKET_BULK_LEN];
  char question[PACKET_BULK_LEN];
  for (i=0;i<PACKET_BULK_LEN; i++) question[i]=i;

    // ***FAILS HERE***
    r = libusb_bulk_transfer(handle, ENDPOINT_BULK_OUT, question, PACKET_BULK_LEN,
                             &transferred,TIMEOUT);
    if (r < 0) {
        fprintf(stderr, "Bulk write error %d\n", r);
        error(r);
        return r;
    }
    fprintf(stdout, "Wrote %d bytes", r);

    r = libusb_bulk_transfer(handle, ENDPOINT_BULK_IN, answer,PACKET_BULK_LEN,
                             &transferred, TIMEOUT);
    if (r < 0) {
        fprintf(stderr, "Bulk read error %d\n", r);
        error(r);
        return r;
    }
    fprintf(stdout, "Read %d bytes", r);

    if (transferred < PACKET_BULK_LEN) {
        fprintf(stderr, "Bulk transfer short read (%d)\n", r);
        error(r);
        return -1;
    }
    printf("Bulk Transfer Loop Test Result:\n");
    //     for (i=0;i< PACKET_BULK_LEN;i++) printf("%i, %i,\n ",question[i],answer[i]);
    for(i = 0;i < PACKET_BULK_LEN; i++) {
        if(i%8 == 0)
            printf("\n");
        printf("%02x, %02x; ",question[i],answer[i]);
    }
    printf("\n\n");

    return 0;

}


static int init(){
libusb_init(NULL);
if((handle = libusb_open_device_with_vid_pid(NULL, VID, PID)) == NULL){
    fprintf(stdout, "Problem acquiring handle\n");
    return -1;
}
libusb_claim_interface(handle, 0);  

return 0;
}

static int shutdown(){
if(handle != NULL)
    libusb_release_interface (handle, 0);
libusb_exit(NULL);
return 0;
}

static int setupAccessory(
const char* manufacturer,
const char* modelName,
const char* description,
const char* version,
const char* uri,
const char* serialNumber){

unsigned char ioBuffer[2];
int devVersion;
int response;

response = libusb_control_transfer(
    handle, //handle
    0xC0, //bmRequestType
    51, //bRequest
    0, //wValue
    0, //wIndex
    ioBuffer, //data
    2, //wLength
    0 //timeout
);

if(response < 0){error(response);return-1;}

devVersion = ioBuffer[1] << 8 | ioBuffer[0];
fprintf(stdout,"Version Code Device: %d\n", devVersion);

usleep(1000);//sometimes hangs on the next transfer :(

response = libusb_control_transfer(handle,0x40,52,0,0,(char*)manufacturer,strlen(manufacturer),0);
if(response < 0){error(response);return -1;}
response = libusb_control_transfer(handle,0x40,52,0,1,(char*)modelName,strlen(modelName)+1,0);
if(response < 0){error(response);return -1;}
response = libusb_control_transfer(handle,0x40,52,0,2,(char*)description,strlen(description)+1,0);
if(response < 0){error(response);return -1;}
response = libusb_control_transfer(handle,0x40,52,0,3,(char*)version,strlen(version)+1,0);
if(response < 0){error(response);return -1;}
response = libusb_control_transfer(handle,0x40,52,0,4,(char*)uri,strlen(uri)+1,0);
if(response < 0){error(response);return -1;}
response = libusb_control_transfer(handle,0x40,52,0,5,(char*)serialNumber,strlen(serialNumber)+1,0);
if(response < 0){error(response);return -1;}

fprintf(stdout,"Accessory Identification sent\n", devVersion);

response = libusb_control_transfer(handle,0x40,53,0,0,NULL,0,0);
if(response < 0){error(response);return -1;}

fprintf(stdout,"Attempted to put device into accessory mode\n", devVersion);

if(handle != NULL)
    libusb_release_interface (handle, 0);

int tries = 4;
for(;;){
    tries--;
    if((handle = libusb_open_device_with_vid_pid(NULL, VID, ACCESSORY_PID)) == NULL){
        if(tries < 0){
            return -1;
        }
    }else{
        break;
    }
    sleep(1);
}

libusb_claim_interface(handle, 0);
fprintf(stdout, "Interface claimed, ready to transfer data\n");
return 0;
}

// error reporting function left out for brevity

#包括
#包括
#包括
#在0x83中定义端点_BULK_
#定义端点\u BULK\u OUT 0x03//已尝试0x00、0x01和0x02
#定义视频0x18D1
#定义PID 0x4E11
#定义附件PID 0x2D00
#定义附件\u ADB\u PID 0x2D01//无法使其工作，如果ADB处于活动状态，则无法在设备上获取句柄
/*
关于OSX
gcc adktest.c-I/usr/local/include-o adktest-lusb-1.0.0-I/usr/local/include-I/usr/local/include/libusb-1.0
在UBUNTU上
gcc adktest.c-I/usr/include-o adktest-lusb-1.0-I/usr/include-I/usr/include/libusb-1.0
使用姜饼2.3.4测试Nexus One
*/
静态int transferTest（）；
静态int init（void）；
静态int关闭（无效）；
静态无效错误（int代码）；
静态无效状态（内部代码）；
静态int设置附件(
const char*制造商，
常量字符*modelName，
常量字符*说明，
常量字符*版本，
常量char*uri，
常量字符*序列号）；
//静止的
静态结构libusb\u设备\u句柄*句柄；
int main（int argc，char*argv[]）{
if（init（）<0）
返回；
if（设置附件）(
“PCHost”，
“PCHost1”，
“说明”，
"1.0",
"http://www.mycompany.com",
“序列号”）<0）{
fprintf（stdout，“设置附件时出错\n”）；
关机（）；
返回-1；
};
if（transferTest（）<0）{
fprintf（stdout，“传输测试中的错误”）；
关机（）；
返回-1；
}   
关机（）；
fprintf（标准输出，“完成”\n）；
返回0；
}
静态int transferTest（）{
//测试批量输入/输出
const static int PACKET\u BULK\u LEN=64；
const static int TIMEOUT=5000；
int r，i；
整数转移；
字符应答[PACKET_BULK_LEN]；
字符问题[PACKET_BULK_LEN]；
对于（i=0；i最初的问题是，为了告诉设备进入附件模式而与设备的原始连接从未关闭。如果在原始设备仍然打开的情况下重新打开并声明接口，USB子系统和/或libusb不会抛出错误。只有在实际尝试写入时，才会出现IO或not FOUND错误/从端点开始

加入：

libusb_close(handle);

在从初始连接释放初始接口的if语句中，问题的libusb端得到了解决

下一个阻止数据在这种特定软件组合中传递的问题是，Android端在接受读取之前等待更大的字节段，这会导致超时（由于哪一方的原因尚未解决），因此如果您将缓冲区设置为与libusb端相匹配（64），您将获得一组从PC写入Android设备的初始字节。之后，软件仍将中断，因为PC/libusb端尝试读取数据，但Android端没有写入任何数据，但这只是未完成的软件，不在问题的范围内。
代码示例非常有用，只需要ome修改使用和通过在Windows上工作

#包括
#包括
#包括
#ifdef_WIN32
#包括
#定义睡眠
#否则
#包括
#恩迪夫
#在0x83中定义端点_BULK_
#定义端点\u BULK\u OUT 0x03//已尝试0x00、0x01和0x02
#定义视频0x18D1
#定义PID 0x4E11
#定义附件PID 0x2D00
#定义附件\u ADB\u PID 0x2D01//无法使其工作，如果ADB处于活动状态，则无法在设备上获取句柄
#定义数据包\u批量\u LEN 64
#定义超时5000
静态测试（无效）；
静态int设置附件(
const char*制造商，
常量字符*modelName，
常量字符*说明，
常量字符*版本，
常量char*uri，
常量字符*序列号）；
//静止的
静态结构libusb\u设备\u句柄*句柄；
int main（int argc，char*argv[]）
{
int r，尝试；
libusb_init（空）；
如果（（handle=libusb\u open\u device\u with\u vid\u pid（NULL，vid，pid））！=NULL）
{
libusb_声明_接口（句柄，0）；
r=设置附件（“PCHost”，
“PCHost1”，
“说明”，
"1.0",
"http://www.mycompany.com",
“序列号”）；
libusb_释放_接口（句柄，0）；
libu_关闭（手柄）；
if（r<0）
{
libu_退出（空）；
fprintf（stdout，“设置附件时出错\n”）；
返回-1；
}
}
试验次数=4次；
对于（；；）
{
尝试--；
如果（（句柄=libusb\u打开\u设备，\u带有\u视频\u pid（NULL，视频，附件\u pid））==NULL）
{
如果（尝试<0）
{
libu_退出（空）；
fprintf（stdout，“获取句柄的问题”）；
返回-1；
}
}
其他的
{
打破
}
睡眠（1）；
}
libusb_声明_接口（句柄，0）；
fprintf（stdout，“接口声明，准备传输数据”）；
r=传输测试（）；
libusb_释放_接口（句柄，0）；
libu_关闭（手柄）；
libu_退出（空）；
if（r<0）
{
fprintf（stdout，“传输测试中的错误”）；
返回-1；
}   
fprintf（标准输出，“完成”\n）；
返回0；
}
静态测试（无效）
{
/
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.mycompany.android.pchost"
      android:versionCode="1"
      android:versionName="1.0">
  <uses-feature android:name="android.hardware.usb.accessory" />
  <uses-sdk android:minSdkVersion="10" />
  <application android:label="@string/app_name" android:icon="@drawable/icon">
    <uses-library android:name="com.android.future.usb.accessory" />
        <activity android:name="MainActivity"
                  android:label="@string/app_name"
                  android:launchMode="singleInstance">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
          <intent-filter>
              <action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED" />
          </intent-filter>

          <meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
              android:resource="@xml/accessory_filter" />

        </activity>
    </application>
</manifest> 

libusb_close(handle);

#include <stdio.h>
#include <libusb.h>
#include <string.h>
#ifdef _WIN32
#include <Windows.h>
#define sleep Sleep
#else
#include <unistd.h>
#endif

#define ENDPOINT_BULK_IN 0x83
#define ENDPOINT_BULK_OUT 0x03 // Have tried 0x00, 0x01 and 0x02

#define VID 0x18D1
#define PID 0x4E11

#define ACCESSORY_PID 0x2D00
#define ACCESSORY_ADB_PID 0x2D01 // Can't get this to work, if ADB is active, can't get handle on device

#define PACKET_BULK_LEN 64
#define TIMEOUT 5000

static int transferTest(void);
static int setupAccessory(
    const char* manufacturer,
    const char* modelName,
    const char* description,
    const char* version,
    const char* uri,
    const char* serialNumber);

//static
static struct libusb_device_handle* handle;

int main (int argc, char *argv[])
{
    int r, tries;

    libusb_init(NULL);
    if((handle = libusb_open_device_with_vid_pid(NULL, VID, PID)) != NULL)
    {
        libusb_claim_interface(handle, 0);  

        r = setupAccessory("PCHost",
                           "PCHost1",
                           "Description",
                           "1.0",
                           "http://www.mycompany.com",
                           "SerialNumber");

        libusb_release_interface (handle, 0);
        libusb_close(handle);

        if (r < 0)
        {
            libusb_exit(NULL);
            fprintf(stdout, "Error setting up accessory\n");
            return -1;
        }
    }

    tries = 4;
    for(;;)
    {
        tries--;
        if((handle = libusb_open_device_with_vid_pid(NULL, VID, ACCESSORY_PID)) == NULL)
        {
            if(tries < 0)
            {
                libusb_exit(NULL);
                fprintf(stdout, "Problem acquiring handle\n");
                return -1;
            }
        }
        else
        {
            break;
        }
        sleep(1);
    }

    libusb_claim_interface(handle, 0);
    fprintf(stdout, "Interface claimed, ready to transfer data\n");

    r = transferTest();

    libusb_release_interface (handle, 0);
    libusb_close(handle);

    libusb_exit(NULL);

    if (r < 0)
    {
        fprintf(stdout, "Error in transferTest\n");
        return -1;
    }   
    fprintf(stdout, "Finished\n");
    return 0;
}

static int transferTest(void)
{
    // TEST BULK IN/OUT
    int r,i;
    int transferred;
    unsigned char answer[PACKET_BULK_LEN];
    unsigned char question[PACKET_BULK_LEN];
    struct libusb_device* device;
    struct libusb_config_descriptor* config;
    struct libusb_interface_descriptor const* interfaceDesc;
    unsigned char epInAddr = ENDPOINT_BULK_IN;
    unsigned char epOutAddr = ENDPOINT_BULK_OUT;
    unsigned char idx;

    for (i=0;i<PACKET_BULK_LEN; i++) 
        question[i]=(unsigned char)i;

    device = libusb_get_device(handle);
    r = libusb_get_active_config_descriptor(device, &config);
    if (r < 0) 
    {
        fprintf(stderr, "No active descriptor error %d\n", r);
        return r;
    }

    interfaceDesc = config->interface[0].altsetting;

    for(idx = 0; idx < interfaceDesc->bNumEndpoints; idx++)
    {
        if ((interfaceDesc->endpoint[idx].bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) == LIBUSB_TRANSFER_TYPE_BULK)
        {
            if ((interfaceDesc->endpoint[idx].bEndpointAddress & LIBUSB_ENDPOINT_IN) == LIBUSB_ENDPOINT_IN)
            {
                epInAddr = interfaceDesc->endpoint[idx].bEndpointAddress;
            }
            else
            {
                epOutAddr = interfaceDesc->endpoint[idx].bEndpointAddress;
            }
        }
    }

    r = libusb_bulk_transfer(handle, epOutAddr, question, PACKET_BULK_LEN,
                             &transferred,TIMEOUT);
    if (r < 0) 
    {
        fprintf(stderr, "Bulk write error %d\n", r);
        return r;
    }
    fprintf(stdout, "Wrote %d bytes", r);

    r = libusb_bulk_transfer(handle, epInAddr, answer,PACKET_BULK_LEN,
        &transferred, TIMEOUT);
    if (r < 0) 
    {
        fprintf(stderr, "Bulk read error %d\n", r);
        return r;
    }
    fprintf(stdout, "Read %d bytes", r);

    if (transferred < PACKET_BULK_LEN) 
    {
        fprintf(stderr, "Bulk transfer short read (%d)\n", r);
        return -1;
    }
    printf("Bulk Transfer Loop Test Result:\n");
    for(i = 0; i < PACKET_BULK_LEN; i++) 
    {
        if(i%8 == 0)
            printf("\n");
        printf("%02x, %02x; ",question[i],answer[i]);
    }
    printf("\n\n");

    return 0;

}

static int setupAccessory(
    const char* manufacturer,
    const char* modelName,
    const char* description,
    const char* version,
    const char* uri,
    const char* serialNumber)
{
    unsigned char ioBuffer[2];
    int devVersion;
    int r;

    r = libusb_control_transfer(
        handle, //handle
        0xC0, //bmRequestType
        51, //bRequest
        0, //wValue
        0, //wIndex
        ioBuffer, //data
        2, //wLength
        0 //timeout
        );

    if(r < 0)
    {
        return-1;
    }

    devVersion = ioBuffer[1] << 8 | ioBuffer[0];
    fprintf(stdout,"Version Code Device: %d\n", devVersion);

    sleep(1); //sometimes hangs on the next transfer :(

    if ((libusb_control_transfer(handle,0x40,52,0,0,(unsigned char*)manufacturer,strlen(manufacturer)+1,0) < 0) ||
        (libusb_control_transfer(handle,0x40,52,0,1,(unsigned char*)modelName,strlen(modelName)+1,0) < 0) ||
        (libusb_control_transfer(handle,0x40,52,0,2,(unsigned char*)description,strlen(description)+1,0) < 0) ||
        (libusb_control_transfer(handle,0x40,52,0,3,(unsigned char*)version,strlen(version)+1,0) < 0) ||
        (libusb_control_transfer(handle,0x40,52,0,4,(unsigned char*)uri,strlen(uri)+1,0) < 0) ||
        (libusb_control_transfer(handle,0x40,52,0,5,(unsigned char*)serialNumber,strlen(serialNumber)+1,0) < 0))
    {
        return -1;
    }

    fprintf(stdout,"Accessory Identification sent\n", devVersion);

    r = libusb_control_transfer(handle,0x40,53,0,0,NULL,0,0);
    if(r < 0)
    {
        return -1;
    }

    fprintf(stdout,"Attempted to put device into accessory mode\n", devVersion);
    return 0;
}