Diff: MicroBridge/ADB/Adb.cpp

Revision:

17:f0a973f17917

diff -r b5d949136a21 -r f0a973f17917 MicroBridge/ADB/Adb.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MicroBridge/ADB/Adb.cpp	Fri May 03 06:30:46 2013 +0000
@@ -0,0 +1,891 @@
+/*
+    Copyright 2011 Niels Brouwers
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/* Changed by Junichi Katsu */
+
+#include <string.h>
+#include <Adb.h>
+
+//#define DEBUG
+
+#define MAX_BUF_SIZE 128
+
+#ifdef DEBUG
+#define  log(...)       printf(__VA_ARGS__)
+#else
+#define  log(...)       do {} while(0)
+#endif
+
+int input_ep;
+int output_ep;
+int _device;
+int _configuration;
+int _interfaceNumber;
+
+static Connection * firstConnection;
+static boolean connected;
+static int connectionLocalId = 1;
+unsigned char readbuff[MAX_BUF_SIZE];
+
+// Event handler callback function.
+adb_eventHandler * eventHandler;
+
+ADB* _adb;
+PacketBuffer recv_packet_buf(100,MAX_BUF_SIZE);
+Ticker timer;
+
+int time_ms = 0;
+
+
+void attime(void)
+{
+    time_ms++;
+}
+
+int millis()
+{
+    return(time_ms);
+}
+
+char *strdup(const char *src)
+{
+    char *p;
+    
+    if(src == NULL){
+        return NULL;
+    }
+    
+    p = (char *)malloc(strlen(src) + 1);
+    if(p != NULL) strcpy(p, src);
+    return p;
+
+}
+
+/**
+ * Initialises the ADB protocol. This function initialises the USB layer underneath so no further setup is required.
+ */
+void ADB::init()
+{   
+    recv_packet_buf.clear();
+    
+    // Signal that we are not connected.
+    _device = 0;
+    connected = false;
+    
+
+    // Initialise Usb host.
+    USBInit();
+    
+    timer.attach_us(&attime, 1000);
+}
+
+/**
+ * Sets the ADB event handler function. This function will be called by the ADB layer
+ * when interesting events occur, such as ADB connect/disconnect, connection open/close, and
+ * connection writes from the ADB device.
+ *
+ * @param handler event handler function.
+ */
+void ADB::setEventHandler(adb_eventHandler * handler)
+{
+    eventHandler = handler;
+}
+
+/**
+ * Fires an ADB event.
+ * @param connection ADB connection. May be NULL in case of global connect/disconnect events.
+ * @param type event type.
+ * @param length payload length or zero if no payload.
+ * @param data payload data if relevant or NULL otherwise.
+ */
+void ADB::fireEvent(Connection * connection, adb_eventType type, uint16_t length, uint8_t * data)
+{
+    // Fire the global event handler, if set.
+    if (eventHandler!=NULL)
+        eventHandler(connection, type, length, data);
+
+    // Fire the event handler of the connection in question, if relevant
+    if (connection!=NULL && connection->eventHandler!=NULL)
+        connection->eventHandler(connection, type, length, data);
+}
+
+/**
+ * Adds a new ADB connection. The connection string is per ADB specs, for example "tcp:1234" opens a
+ * connection to tcp port 1234, and "shell:ls" outputs a listing of the phone root filesystem. Connections
+ * can be made persistent by setting reconnect to true. Persistent connections will be automatically
+ * reconnected when the USB cable is re-plugged in. Non-persistent connections will connect only once,
+ * and should never be used after they are closed.
+ *
+ * The connection string is copied into the Connection record and may not exceed ADB_CONNECTIONSTRING_LENGTH-1
+ * characters.
+ *
+ * @param connectionString ADB connectionstring. I.e. "tcp:1234" or "shell:ls".
+ * @param reconnect true for automatic reconnect (persistent connections).
+ * @param handler event handler.
+ * @return an ADB connection record or NULL on failure (not enough slots or connection string too long).
+ */
+Connection * ADB::addConnection(const char * connectionString, boolean reconnect, adb_eventHandler * handler)
+{
+
+    // Allocate a new ADB connection object
+    Connection * connection = (Connection*)malloc(sizeof(Connection));
+    if (connection == NULL) return NULL;
+
+    // Allocate memory for the connection string
+    connection->connectionString = (char*)strdup(connectionString);
+    if (connection->connectionString==NULL)
+    {
+        // Free the connection object and return null
+        free(connection);
+        return NULL;
+    }
+
+    // Initialise the newly created object.
+    connection->localID = connectionLocalId ++;
+    connection->status = ADB_CLOSED;
+    connection->lastConnectionAttempt = 0;
+    connection->reconnect = reconnect;
+    connection->eventHandler = handler;
+
+    // Add the connection to the linked list. Note that it's easier to just insert
+    // at position 0 because you don't have to traverse the list :)
+    connection->next = firstConnection;
+    firstConnection = connection;
+
+    // Unable to find an empty spot, all connection slots in use.
+    return connection;
+}
+
+/**
+ * Prints an ADB_message, for debugging purposes.
+ * @param message ADB message to print.
+ */
+#ifdef DEBUG
+static void adb_printMessage(adb_message * message)
+{
+    switch(message->command)
+    {
+    case A_OKAY:
+        printf("OKAY message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    case A_CLSE:
+        printf("CLSE message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    case A_WRTE:
+        printf("WRTE message [%lx] %ld %ld, %ld bytes\r\n", message->command, message->arg0, message->arg1, message->data_length);
+        break;
+    case A_CNXN:
+        printf("CNXN message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    case A_SYNC:
+        printf("SYNC message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    case A_OPEN:
+        printf("OPEN message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    default:
+        printf("WTF message [%lx] %ld %ld\r\n", message->command, message->arg0, message->arg1);
+        break;
+    }
+}
+#endif
+
+/**
+ * Writes an empty message (without payload) to the ADB device.
+ *
+ * @param device USB device handle.
+ * @param command ADB command.
+ * @param arg0 first ADB argument (command dependent).
+ * @param arg0 second ADB argument (command dependent).
+ * @return error code or 0 for success.
+ */
+int ADB::writeEmptyMessage(int device, uint32_t command, uint32_t arg0, uint32_t arg1)
+{
+    adb_message message;
+
+    message.command = command;
+    message.arg0 = arg0;
+    message.arg1 = arg1;
+    message.data_length = 0;
+    message.data_check = 0;
+    message.magic = command ^ 0xffffffff;
+
+#ifdef DEBUG
+    printf("OUT << "); adb_printMessage(&message);
+#endif
+
+    int r = USBBulkTransfer( device , output_ep , (uint8_t*)&message , sizeof(adb_message) );
+
+#ifdef DEBUG
+    log("[writeMessage1] size:%d\r\n",r);
+    
+    int ii,jj;
+    uint8_t* buf = (uint8_t*)&message;
+    for(ii = 0 ; ii < r ; ii+=16)
+    {
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%02X%02X ",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log(" : ");
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%c%c",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log("\r\n");
+        if((ii+jj) > r) break;
+    }
+#endif
+
+    return r;
+}
+
+/**
+ * Writes an ADB message with payload to the ADB device.
+ *
+ * @param device USB device handle.
+ * @param command ADB command.
+ * @param arg0 first ADB argument (command dependent).
+ * @param arg0 second ADB argument (command dependent).
+ * @param length payload length.
+ * @param data command payload.
+ * @return error code or 0 for success.
+ */
+int ADB::writeMessage(int device, uint32_t command, uint32_t arg0, uint32_t arg1, uint32_t length, uint8_t * data)
+{
+    adb_message message;
+    uint8_t msg[256];
+    uint32_t count, sum = 0;
+    uint8_t * x;
+
+    // Calculate data checksum
+    count = length;
+    x = data;
+    while(count-- > 0) sum += *x++;
+
+    // Fill out the message record.
+    message.command = command;
+    message.arg0 = arg0;
+    message.arg1 = arg1;
+    message.data_length = length;
+    message.data_check = (sum);
+    message.magic = command ^ 0xffffffff;
+    
+#ifdef DEBUG
+    printf("OUT << "); adb_printMessage(&message);
+#endif
+
+    int r = USBBulkTransfer( device , output_ep , (uint8_t*)&message , sizeof(adb_message) );
+    
+    if (r<0) return r;
+
+#ifdef DEBUG
+    log("[writeMessage1] size:%d\r\n",r);
+    
+    int ii,jj;
+    uint8_t* buf = (uint8_t*)&message;
+    for(ii = 0 ; ii < r ; ii+=16)
+    {
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%02X%02X ",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log(" : ");
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%c%c",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log("\r\n");
+        if((ii+jj) > r) break;
+    }
+#endif
+    
+    memcpy( msg , data , length );
+    
+    r = USBBulkTransfer( device , output_ep , msg , length );
+    log("USB SEND RET2:%d\r\n",r);
+    
+    if (r<0) return r;
+    
+#ifdef DEBUG
+    log("[writeMessage2] size:%d\r\n",r);
+    
+    buf = msg;
+    for(ii = 0 ; ii < r ; ii+=16)
+    {
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%02X%02X ",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log(" : ");
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%c%c",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > r) break;
+        }
+        log("\r\n");
+        if((ii+jj) > r) break;
+    }
+#endif
+    
+    r = 0;
+    
+    return r;
+}
+
+/**
+ * Writes an ADB command with a string as payload.
+ *
+ * @param device USB device handle.
+ * @param command ADB command.
+ * @param arg0 first ADB argument (command dependent).
+ * @param arg0 second ADB argument (command dependent).
+ * @param str payload string.
+ * @return error code or 0 for success.
+ */
+int ADB::writeStringMessage(int device, uint32_t command, uint32_t arg0, uint32_t arg1, char * str)
+{
+    return ADB::writeMessage(device, command, arg0, arg1, strlen(str) + 1, (uint8_t*)str);
+}
+
+/**
+ * Poll an ADB message.
+ * @param message on success, the ADB message will be returned in this struct.
+ * @param poll true to poll for a packet on the input endpoint, false to wait for a packet. Use false here when a packet is expected (i.e. OKAY in response to WRTE)
+ * @return true iff a packet was successfully received, false otherwise.
+ */
+boolean ADB::pollMessage(adb_message * message, boolean poll)
+{
+    int bytesRead = 0;
+    uint8_t buf[ADB_USB_PACKETSIZE];
+
+    // Poll a packet from the USB
+    bytesRead = recv_packet_buf.GetPacket((char*)buf);
+
+    // Check if the USB in transfer was successful.
+    if (bytesRead<=0) return false;
+
+    log("[pollMessage] byteRead size:%d\r\n",bytesRead);
+    
+    // Check if the buffer contains a valid message
+    memcpy((void*)message, (void*)buf, sizeof(adb_message));
+
+    // If the message is corrupt, return.
+#if 1
+    if (message->magic != (message->command ^ 0xffffffff))
+    {
+#ifdef DEBUG
+        printf("Broken message, magic mismatch, %d bytes\r\n", bytesRead);
+        return false;
+#endif
+    }
+#endif
+    // Check if the received number of bytes matches our expected 24 bytes of ADB message header.
+    if (bytesRead != sizeof(adb_message)) return false;
+
+    return true;
+}
+
+/**
+ * Sends an ADB OPEN message for any connections that are currently in the CLOSED state.
+ */
+void ADB::openClosedConnections()
+{
+    uint32_t timeSinceLastConnect;
+    Connection * connection;
+
+    // Iterate over the connection list and send "OPEN" for the ones that are currently closed.
+    for (connection = firstConnection; connection!=NULL; connection = connection->next)
+    {
+        timeSinceLastConnect = millis() - connection->lastConnectionAttempt;
+        if (connection->status==ADB_CLOSED && timeSinceLastConnect>ADB_CONNECTION_RETRY_TIME)
+        {
+            // Issue open command.
+            ADB::writeStringMessage(_device, A_OPEN, connection->localID, 0, connection->connectionString);
+
+            // Record the last attempt time
+            connection->lastConnectionAttempt = millis();
+            connection->status = ADB_OPENING;
+
+        }
+    }
+
+}
+
+/**
+ * Handles and ADB OKAY message, which represents a transition in the connection state machine.
+ *
+ * @param connection ADB connection
+ * @param message ADB message struct.
+ */
+void ADB::handleOkay(Connection * connection, adb_message * message)
+{
+    // Check if the OKAY message was a response to a CONNECT message.
+    if (connection->status==ADB_OPENING)
+    {
+        connection->status = ADB_OPEN;
+        connection->remoteID = message->arg0;
+
+        ADB::fireEvent(connection, ADB_CONNECTION_OPEN, 0, NULL);
+    }
+
+    // Check if the OKAY message was a response to a WRITE message.
+    if (connection->status == ADB_WRITING)
+        connection->status = ADB_OPEN;
+
+}
+
+/**
+ * Handles an ADB CLOSE message, and fires an ADB event accordingly.
+ *
+ * @param connection ADB connection
+ */
+void ADB::handleClose(Connection * connection)
+{
+    // Check if the CLOSE message was a response to a CONNECT message.
+    if (connection->status==ADB_OPENING)
+        ADB::fireEvent(connection, ADB_CONNECTION_FAILED, 0, NULL);
+    else
+        ADB::fireEvent(connection, ADB_CONNECTION_CLOSE, 0, NULL);
+
+    // Connection failed
+    if (connection->reconnect)
+        connection->status = ADB_CLOSED;
+    else
+        connection->status = ADB_UNUSED;
+
+}
+
+/**
+ * Handles an ADB WRITE message.
+ *
+ * @param connection ADB connection
+ * @param message ADB message struct.
+ */
+void ADB::handleWrite(Connection * connection, adb_message * message)
+{
+    uint32_t bytesLeft = message->data_length;
+    uint8_t buf[ADB_USB_PACKETSIZE];
+    ConnectionStatus previousStatus;
+    int bytesRead;
+
+    previousStatus = connection->status;
+
+    connection->status = ADB_RECEIVING;
+    connection->dataRead = 0;
+    connection->dataSize = message->data_length;
+
+    while (bytesLeft>0)
+    {
+        int len = bytesLeft < ADB_USB_PACKETSIZE ? bytesLeft : ADB_USB_PACKETSIZE;
+
+        // Read payload
+        bytesRead = recv_packet_buf.GetPacket((char*)buf);
+        
+
+        // Poll the USB layer.
+        USBLoop();
+        
+        log("[handleWrite] byteRead size:%d\r\n",bytesRead);
+
+//        if (len != bytesRead)
+//            printf("bytes read mismatch: %d expected, %d read, %ld left\r\n", len, bytesRead, bytesLeft);
+
+        // Break out of the read loop if there's no data to read :(
+        if (bytesRead==-1) break;
+        else if(bytesRead!=0)
+        {
+            connection->dataRead += len;
+            ADB::fireEvent(connection, ADB_CONNECTION_RECEIVE, len, buf);
+
+            bytesLeft -= bytesRead;
+        }
+    }
+
+    // Send OKAY message in reply.
+    bytesRead = ADB::writeEmptyMessage(_device, A_OKAY, message->arg1, message->arg0);
+
+    connection->status = previousStatus;
+    
+}
+
+/**
+ * Close all ADB connections.
+ *
+ * @param connection ADB connection
+ * @param message ADB message struct.
+ */
+void ADB::closeAll()
+{
+    Connection * connection;
+
+    // Iterate over all connections and close the ones that are currently open.
+    for (connection = firstConnection; connection != NULL; connection = connection->next)
+        if (!(connection->status==ADB_UNUSED || connection->status==ADB_CLOSED))
+            ADB::handleClose(connection);
+
+}
+
+/**
+ * Handles an ADB connect message. This is a response to a connect message sent from our side.
+ * @param message ADB message.
+ */
+void ADB::handleConnect(adb_message * message)
+{
+    unsigned int bytesRead;
+    uint8_t buf[MAX_BUF_SIZE];
+    uint16_t len;
+
+    // Read payload (remote ADB device ID)
+    len = message->data_length < MAX_BUF_SIZE ? message->data_length : MAX_BUF_SIZE;
+    bytesRead = recv_packet_buf.GetPacket((char*)buf);
+    
+    log("[handleConnect] byteRead size:%d\r\n",bytesRead);
+
+    // Signal that we are now connected to an Android device (yay!)
+    connected = true;
+
+    // Fire event.
+    ADB::fireEvent(NULL, ADB_CONNECT, len, buf);
+
+}
+
+/**
+ * This method is called periodically to check for new messages on the USB bus and process them.
+ */
+void ADB::poll()
+{
+    Connection * connection;
+    adb_message message;
+
+    // Poll the USB layer.
+    USBLoop();
+
+    // If no USB device, there's no work for us to be done, so just return.
+    if (_device==0) return;
+
+    // If not connected, send a connection string to the device.
+    if (!connected)
+    {
+        ADB::writeStringMessage(_device, A_CNXN, 0x01000000, 4096, (char*)"host::microbridge");
+        for(int ii=0;ii<400;ii++)
+        {
+            USBLoop();
+            wait_ms(1);
+        }
+        //wait_ms(500); // Give the device some time to respond.
+    }
+
+    // If we are connected, check if there are connections that need to be opened
+    if (connected)
+        ADB::openClosedConnections();
+
+    // Check for an incoming ADB message.
+    if (!ADB::pollMessage(&message, true))
+        return;
+
+    // Handle a response from the ADB device to our CONNECT message.
+    if (message.command == A_CNXN)
+        ADB::handleConnect(&message);
+
+    // Handle messages for specific connections
+    for (connection = firstConnection; connection != NULL; connection = connection->next)
+    {
+        if(connection->status!=ADB_UNUSED && connection->localID==message.arg1)
+        {
+            switch(message.command)
+            {
+            case A_OKAY:
+                //printf("HANDLE OKEY\r\n");
+                ADB::handleOkay(connection, &message);
+                break;
+            case A_CLSE:
+                printf("HANDLE CLOSE\r\n");
+                ADB::handleClose(connection);
+                break;
+            case A_WRTE:
+                //printf("HANDLE WRITE\r\n");
+                ADB::handleWrite(connection, &message);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+
+}
+
+void ADB::AdbreadCallback(int device, int endpoint, int status, u8* buf, int len, void* userData) {
+    
+    recv_packet_buf.PutPacket((char*)buf,len);
+    
+#ifdef DEBUG
+    log("[AdbreadCallback] size:%d\r\n",len);
+    
+    int ii,jj;
+    for(ii = 0 ; ii < len ; ii+=16)
+    {
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%02X%02X ",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > len) break;
+        }
+        log(" : ");
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%c%c",buf[ii+jj],buf[ii+jj+1]);
+            if((ii+jj) > len) break;
+        }
+        log("\r\n");
+        if((ii+jj) > len) break;
+    }
+#endif
+    USBBulkTransfer(device, endpoint ,readbuff,sizeof(readbuff), AdbreadCallback, userData);
+  //  wait_ms(4);
+}
+
+/**
+ * Checks whether the a connected USB device is an ADB device and populates a configuration record if it is.
+ *
+ * @param device USB device.
+ * @param handle pointer to a configuration record. The endpoint device address, configuration, and endpoint information will be stored here.
+ * @return true iff the device is an ADB device.
+ */
+boolean ADB::isAdbDevice(int device, int configuration, int interfaceNumber)
+{
+    boolean ret = false;
+    
+    log("connecting Android \r\n");
+    
+    _device = device;
+    _configuration = configuration;
+    _interfaceNumber = interfaceNumber;
+    
+    log("device = %d configuration = %d interfaceNumber = %d\r\n", device, configuration, interfaceNumber);
+    
+    int err;
+    
+    u8 buffer[255];
+    err = GetDescriptor(_device,DESCRIPTOR_TYPE_CONFIGURATION,0,buffer,4);
+    
+    if (err < 0) {
+        log("Failed to get descriptor\r\n");
+        return(ret);
+    }
+    
+    int len = buffer[2] | (buffer[3] << 8);
+    if (len > sizeof(buffer)) {
+        log("config descriptor too large\r\n");
+        /* might want to truncate here */
+        return(ret);
+    }
+    err = GetDescriptor(_device,DESCRIPTOR_TYPE_CONFIGURATION,0,buffer,len);
+    u8* p = buffer;
+    input_ep=0;
+    output_ep=0;
+    EndpointDescriptor *epDesc;
+    
+    log("Descriptor size:%d\r\n",len);
+    int ii,jj;
+    for(ii = 0 ; ii < len ; ii+=16)
+    {
+        for(jj = 0 ; jj < 16 ; jj+=2 )
+        {
+            log("%02X%02X ",buffer[ii+jj],buffer[ii+jj+1]);
+            if((ii+jj) > len) break;
+        }
+        log("\r\n");
+        if((ii+jj) > len) break;
+    }
+    u8 interface_num = 0;
+    
+    while (p<(buffer+len)) {
+        u8 descLen  = p[0];
+        u8 descType = p[1];
+        log("descLen=%d,descType=%d\r\n",descLen,descType);
+        switch (descType) {
+            case DESCRIPTOR_TYPE_CONFIGURATION:
+                log("config desc\r\n");
+                break;
+            case DESCRIPTOR_TYPE_INTERFACE:
+                interface_num = p[2];
+                log("interface desc num[%d]\r\n",interface_num);
+                break;
+            case DESCRIPTOR_TYPE_ENDPOINT:
+                epDesc=(EndpointDescriptor*)p;
+                if( interface_num == 1 )
+                {
+                    if (!input_ep && (epDesc->bEndpointAddress& 0x80)) {
+                        input_ep=epDesc->bEndpointAddress& 0x7f;
+                        //PacketSize drop
+                        log("input Endpoint address=%d,wMaxPacketSize=%d,bmAttributes=%d\r\n",input_ep,epDesc->wMaxPacketSize,epDesc->bmAttributes);
+
+                    } else if (!output_ep) {
+                        output_ep=epDesc->bEndpointAddress& 0x7f;
+                        //PacketSize drop
+                        log("output Endpoint address=%d,wMaxPacketSize=%d,bmAttributes=%d\r\n",output_ep,epDesc->wMaxPacketSize,epDesc->bmAttributes);
+                    } else {
+                        //other
+                        log("non input,output Endpoint address=%d,wMaxPacketSize=%d,bmAttributes=%d\r\n",input_ep,epDesc->wMaxPacketSize,epDesc->bmAttributes);
+                    }
+                }
+                break;
+            default:
+                log("unkown desc type(%d) \r\n",descType);
+        }
+        p+=descLen;
+    }
+    
+    if (!(input_ep && output_ep)) {
+        log("can't find accessory endpoints\r\n");
+        return(false);
+    }
+    
+    log("SetConfiguration\r\n");
+    err = SetConfiguration(device,configuration);
+    if (err < 0) {
+        log("SetConfiguration error\r\n");
+        return(false);
+    }
+    
+    log("interrupt setup\r\n");
+    //interrupt setup
+    if (IO_PENDING!=USBBulkTransfer(_device,input_ep|0x80,readbuff,sizeof(readbuff),AdbreadCallback,NULL))    return(ret);
+    
+    log("ADB Standby\r\n");
+    ret = true;
+    
+    return(ret);
+}
+
+
+void desconnect(void)
+{
+    ADB::closeAll();
+    _device = 0;
+    connected = false;
+}
+
+/**
+ * Write a set of bytes to an open ADB connection.
+ *
+ * @param connection ADB connection to write the data to.
+ * @param length number of bytes to transmit.
+ * @param data data to send.
+ * @return number of transmitted bytes, or -1 on failure.
+ */
+int ADB::write(Connection * connection, uint16_t length, uint8_t * data)
+{
+    int ret;
+
+    // First check if we have a working ADB connection
+    if (_device==0 || !connected) return -1;
+
+    // Check if the connection is open for writing.
+    if (connection->status != ADB_OPEN) return -2;
+
+    // Write payload
+    ret = ADB::writeMessage(_device, A_WRTE, connection->localID, connection->remoteID, length, data);
+    if (ret==0)
+        connection->status = ADB_WRITING;
+
+    return ret;
+}
+
+/**
+ * Write a string to an open ADB connection. The trailing zero is not transmitted.
+ *
+ * @param connection ADB connection to write the data to.
+ * @param length number of bytes to transmit.
+ * @param data data to send.
+ * @return number of transmitted bytes, or -1 on failure.
+ */
+int ADB::writeString(Connection * connection, char * str)
+{
+    int ret;
+
+    // First check if we have a working ADB connection
+    if (_device==0 || !connected) return -1;
+
+    // Check if the connection is open for writing.
+    if (connection->status != ADB_OPEN) return -2;
+
+    // Write payload
+    ret = ADB::writeStringMessage(_device, A_WRTE, connection->localID, connection->remoteID, str);
+    if (ret==0)
+        connection->status = ADB_WRITING;
+
+    return ret;
+}
+
+/**
+ * Write a set of bytes to this ADB connection.
+ *
+ * @param length number of bytes to transmit.
+ * @param data data to send.
+ * @return number of transmitted bytes, or -1 on failure.
+ */
+int Connection::write(uint16_t length, uint8_t * data)
+{
+    return ADB::write(this, length, data);
+}
+
+/**
+ * Write a string to this connection.
+ *
+ * @param length number of bytes to transmit.
+ * @param data data to send.
+ * @return number of transmitted bytes, or -1 on failure.
+ */
+int Connection::writeString(char * str)
+{
+    return ADB::writeString(this, str);
+}
+
+/**
+ * Checks if the connection is open for writing.
+ * @return true iff the connection is open and ready to accept write commands.
+ */
+bool Connection::isOpen()
+{
+    return this->status == ADB_OPEN;
+}
+
+
+/** from USBHost load function. initialize Android device**/
+void OnLoadDevice(int device, DeviceDescriptor* deviceDesc, InterfaceDescriptor* interfaceDesc) {
+    char s[128];
+    
+    log("LoadDevice %d %02X:%02X:%02X\r\n",device,interfaceDesc->bInterfaceClass,interfaceDesc->bInterfaceSubClass,interfaceDesc->bInterfaceProtocol);
+    
+    for (int i = 1; i < 4; i++) {
+        if (GetString(device,i,s,sizeof(s)) < 0)
+            break;
+        printf("%d: %s\r\n",i,s);
+    }
+    
+    // Adb?
+    if(1)
+    {
+        ADB::isAdbDevice(device,1,2);
+    }
+    
+}