Diff: USBHostHID/USBHostGamepad.cpp

Revision:

32:e6717a485577

Child:

33:86c22c0c8aae

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostHID/USBHostGamepad.cpp	Tue Jun 02 05:57:44 2015 +0000
@@ -0,0 +1,196 @@
+/* mbed USBHost Gamepad driver sample
+ * Copyright (c) 2014 Yuuichi Akagawa
+ *
+ * modified from mbed USBHostMouse
+ *
+ * mbed USBHost Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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.
+ * Refer to following URL: 
+ * https://developer.mbed.org/users/YuuichiAkagawa/code/USBHostGamepad/file/7345e2afa41e/USBHostGamepad.cpp
+ */
+#include "USBHostGamepad.h"
+//#if USBHOST_GAMEPAD
+
+USBHostGamepad::USBHostGamepad() {
+    host = USBHost::getHostInst();
+    init();
+}
+
+void USBHostGamepad::init() {
+    dev = NULL;
+    int_in = NULL;
+    onUpdate = NULL;
+    report_id = 0;
+    dev_connected = false;
+    gamepad_device_found = false;
+    gamepad_intf = -1;
+
+    btnX = 0;
+    btnY = 0;
+    btnABCD = 0;
+    btnSpecial = 0;
+}
+
+bool USBHostGamepad::connected() {
+    return dev_connected;
+}
+
+bool USBHostGamepad::connect() {
+    int len_listen;
+
+    if (dev_connected) {
+        return true;
+    }
+
+    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
+        if ((dev = host->getDevice(i)) != NULL) {
+
+            if(host->enumerate(dev, this))
+                break;
+
+            if (gamepad_device_found) {
+
+                int_in = dev->getEndpoint(gamepad_intf, INTERRUPT_ENDPOINT, IN);
+                if (!int_in)
+                    break;
+
+                USB_INFO("New Gamepad/Joystick device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, gamepad_intf);
+#if DEBUG > 3
+                //Parse HID Report Descriptor
+                parseHidDescr();
+#endif
+                dev->setName("Gamepad", gamepad_intf);
+                host->registerDriver(dev, gamepad_intf, this, &USBHostGamepad::init);
+
+                int_in->attach(this, &USBHostGamepad::rxHandler);
+                len_listen = int_in->getSize();
+                if (len_listen > sizeof(report)) {
+                    len_listen = sizeof(report);
+                }
+                host->interruptRead(dev, int_in, report, len_listen, false);
+
+                dev_connected = true;
+                return true;
+            }
+        }
+    }
+    init();
+    return false;
+}
+
+void USBHostGamepad::rxHandler() {
+    int len_listen = int_in->getSize();
+#if DEBUG > 3
+    USB_DBG("USBHostGamepad::rxHandler() len_listen=%d\r\n", len_listen);
+      for (int i = 0; i < len_listen; i++)
+          printf("%02X ", report[i]);
+      printf("\r\n\r\n");
+#endif
+    if (onUpdate) {
+        (*onUpdate)(report[0], report[1], report[5], report[6]);
+    }
+
+    // update gamepad state
+    btnX       = report[0];
+    btnY       = report[1];
+    btnABCD    = report[5];
+    btnSpecial = report[6];
+
+    if (len_listen > sizeof(report)) {
+        len_listen = sizeof(report);
+    }
+
+    if (dev)
+        host->interruptRead(dev, int_in, report, len_listen, false);
+}
+
+/*virtual*/ void USBHostGamepad::setVidPid(uint16_t vid, uint16_t pid)
+{
+    // we don't check VID/PID for gamepad driver
+}
+
+/*virtual*/ bool USBHostGamepad::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
+{
+    if ((gamepad_intf == -1) &&
+        (intf_class == HID_CLASS) &&
+        (intf_subclass == 0x00) &&
+        (intf_protocol == 0x00)) {
+        gamepad_intf = intf_nb;
+        return true;
+    }
+    return false;
+}
+
+/*virtual*/ bool USBHostGamepad::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
+{
+    if (intf_nb == gamepad_intf) {
+        if (type == INTERRUPT_ENDPOINT && dir == IN) {
+            gamepad_device_found = true;
+            return true;
+        }
+    }
+    return false;
+}
+
+USB_TYPE USBHostGamepad::getReportDescriptor(USBDeviceConnected * dev, uint8_t * buf, uint16_t max_len_buf, uint16_t * len_rep_descr)
+{
+    USB_TYPE t = host->controlRead(  dev,
+                         USB_DEVICE_TO_HOST | USB_RECIPIENT_INTERFACE | USB_REQUEST_TYPE_STANDARD,
+                         HID_GET_DESCRIPTOR,
+                         0x2200,
+                         0, buf, max_len_buf);
+    if (len_rep_descr)
+        *len_rep_descr = max_len_buf;
+
+    return t;
+}
+
+/*
+ * HID Report Descriptor parser
+ */ 
+bool USBHostGamepad::parseHidDescr()
+{
+    bool ret = true;
+    uint8_t *buf;
+    uint16_t desclen = host->getLengthReportDescr();
+
+    //allocate report descriptor's buffer
+    buf = (uint8_t *)malloc(desclen);
+    if(buf == NULL){
+        return false;
+    }
+    getReportDescriptor(dev, buf, desclen);
+  #if (DEBUG > 3)
+      USB_DBG("HID REPORT DESCRIPTOR:\r\n");
+      for (int i = 0; i < desclen; i++)
+          printf("%02X ", buf[i]);
+      printf("\r\n\r\n");
+  #endif
+  if(  buf[0] == 0x05 //Usage page
+    && buf[1] == 0x01 //Generic Desktop
+    && buf[2] == 0x09 //Usage
+    ){
+        if( buf[3] == 0x04 ){
+            USB_DBG("GAMEPAD");
+        }else if( buf[3] == 0x05){
+            USB_DBG("JOYSTICK");
+        }else{
+            ret = false;
+        }
+    }
+    free(buf);
+    return ret;
+}
+//#endif