USBHostKeyboard.cpp

00001 /* mbed USBHost Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "USBHostKeyboard.h"
00018 
00019 #if USBHOST_KEYBOARD
00020 
00021 static uint8_t keymap[4][0x39] = { 
00022     { 0, 0, 0, 0, 'a', 'b' /*0x05*/,
00023       'c', 'd', 'e', 'f', 'g' /*0x0a*/,
00024       'h', 'i', 'j', 'k', 'l'/*0x0f*/,
00025       'm', 'n', 'o', 'p', 'q'/*0x14*/,
00026       'r', 's', 't', 'u', 'v'/*0x19*/,
00027       'w', 'x', 'y', 'z', '1'/*0x1E*/,
00028       '2', '3', '4', '5', '6'/*0x23*/,
00029       '7', '8', '9', '0', 0x0A /*enter*/, /*0x28*/
00030       0x1B /*escape*/, 0x08 /*backspace*/, 0x09/*tab*/, 0x20/*space*/, '-', /*0x2d*/
00031       '=', '[', ']', '\\', '#', /*0x32*/
00032       ';', '\'', 0, ',', '.', /*0x37*/
00033       '/'},
00034 
00035     /* CTRL MODIFIER */
00036     { 0, 0, 0, 0, 0, 0 /*0x05*/,
00037       0, 0, 0, 0, 0 /*0x0a*/,
00038       0, 0, 0, 0, 0/*0x0f*/,
00039       0, 0, 0, 0, 0/*0x14*/,
00040       0, 0, 0, 0, 0/*0x19*/,
00041       0, 0, 0, 0, 0/*0x1E*/,
00042       0, 0, 0, 0, 0/*0x23*/,
00043       0, 0, 0, 0, 0 /*enter*/, /*0x28*/
00044       0, 0, 0, 0, 0, /*0x2d*/
00045       0, 0, 0, 0, 0, /*0x32*/
00046       0, 0, 0, 0, 0, /*0x37*/
00047       0},
00048 
00049     /* SHIFT MODIFIER */
00050     { 0, 0, 0, 0, 'A', 'B' /*0x05*/,
00051       'C', 'D', 'E', 'F', 'G' /*0x0a*/,
00052       'H', 'I', 'J', 'K', 'L'/*0x0f*/,
00053       'M', 'N', 'O', 'P', 'Q'/*0x14*/,
00054       'R', 'S', 'T', 'U', 'V'/*0x19*/,
00055       'W', 'X', 'Y', 'Z', '!'/*0x1E*/,
00056       '@', '#', '$', '%', '^'/*0x23*/,
00057       '&', '*', '(', ')', 0, /*0x28*/
00058       0, 0, 0, 0, 0, /*0x2d*/
00059       '+', '{', '}', '|', '~', /*0x32*/
00060       ':', '"', 0, '<', '>', /*0x37*/
00061       '?'},
00062 
00063     /* ALT MODIFIER */
00064     { 0, 0, 0, 0, 0, 0 /*0x05*/,
00065       0, 0, 0, 0, 0 /*0x0a*/,
00066       0, 0, 0, 0, 0/*0x0f*/,
00067       0, 0, 0, 0, 0/*0x14*/,
00068       0, 0, 0, 0, 0/*0x19*/,
00069       0, 0, 0, 0, 0/*0x1E*/,
00070       0, 0, 0, 0, 0/*0x23*/,
00071       0, 0, 0, 0, 0 /*enter*/, /*0x28*/
00072       0, 0, 0, 0, 0, /*0x2d*/
00073       0, 0, 0, 0, 0, /*0x32*/
00074       0, 0, 0, 0, 0, /*0x37*/
00075       0}
00076 
00077 };
00078 
00079 
00080 USBHostKeyboard::USBHostKeyboard() {
00081     host = USBHost::getHostInst();
00082     init();
00083 }
00084 
00085 
00086 void USBHostKeyboard::init() {
00087     dev = NULL;
00088     int_in = NULL;
00089     report_id = 0;
00090     onKey = NULL;
00091     onKeyCode = NULL;
00092     dev_connected = false;
00093     keyboard_intf = -1;
00094     keyboard_device_found = false;
00095 }
00096 
00097 bool USBHostKeyboard::connected() {
00098     return dev_connected;
00099 }
00100 
00101 
00102 bool USBHostKeyboard::connect() {
00103     
00104     if (dev_connected) {
00105         return true;
00106     }
00107     
00108     for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
00109         if ((dev = host->getDevice(i)) != NULL) {
00110 
00111             if (host->enumerate(dev, this))
00112                 break;
00113             
00114             if (keyboard_device_found) {
00115                 int_in = dev->getEndpoint(keyboard_intf, INTERRUPT_ENDPOINT, IN);
00116                 
00117                 if (!int_in)
00118                     break;
00119                 
00120                 USB_INFO("New Keyboard device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, keyboard_intf);
00121                 dev->setName("Keyboard", keyboard_intf);
00122                 host->registerDriver(dev, keyboard_intf, this, &USBHostKeyboard::init);
00123                 
00124                 int_in->attach(this, &USBHostKeyboard::rxHandler);
00125                 host->interruptRead(dev, int_in, report, int_in->getSize(), false);
00126                 
00127                 dev_connected = true;
00128                 return true;
00129             }
00130         }
00131     }
00132     init();
00133     return false;
00134 }
00135 
00136 void USBHostKeyboard::rxHandler() {
00137     int len = int_in->getLengthTransferred();
00138     int index = (len == 9) ? 1 : 0;
00139     int len_listen = int_in->getSize();
00140     uint8_t key = 0;
00141     if (len == 8 || len == 9) {
00142         uint8_t modifier = (report[index] == 4) ? 3 : report[index];
00143         len_listen = len;
00144         key = keymap[modifier][report[index + 2]];
00145         if (key && onKey) {
00146             (*onKey)(key);
00147         }
00148         if ((report[index + 2] || modifier) && onKeyCode) {
00149             (*onKeyCode)(report[index + 2], modifier);
00150         }
00151     }
00152     if (dev && int_in)
00153         host->interruptRead(dev, int_in, report, len_listen, false);
00154 }
00155 
00156 /*virtual*/ void USBHostKeyboard::setVidPid(uint16_t vid, uint16_t pid)
00157 {
00158     // we don't check VID/PID for keyboard driver
00159 }
00160 
00161 /*virtual*/ bool USBHostKeyboard::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
00162 {
00163     if ((keyboard_intf == -1) &&
00164         (intf_class == HID_CLASS) &&
00165         (intf_subclass == 0x01) &&
00166         (intf_protocol == 0x01)) {
00167         keyboard_intf = intf_nb;
00168         return true;
00169     }
00170     return false;
00171 }
00172 
00173 /*virtual*/ bool USBHostKeyboard::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
00174 {
00175     if (intf_nb == keyboard_intf) {
00176         if (type == INTERRUPT_ENDPOINT && dir == IN) {
00177             keyboard_device_found = true;
00178             return true;
00179         }
00180     }
00181     return false;
00182 }
00183 
00184 #endif