Mbed OS Reference | USBHID.h Source File

 /*
  * Copyright (c) 2018-2019, Arm Limited and affiliates.
  * SPDX-License-Identifier: Apache-2.0
  *
  * 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.
  */
 
 #ifndef USB_HID_H
 #define USB_HID_H
 
 /* These headers are included for child class. */
 #include "USBDescriptor.h"
 #include "USBDevice.h"
 
 #include "USBHID_Types.h"
 #include "OperationList.h"
 
 
 
 /**
  * USBHID example
  * @code
  * #include "mbed.h"
  * #include "USBHID.h"
  *
  * USBHID hid;
  * HID_REPORT recv;
  * BusOut leds(LED1,LED2,LED3,LED4);
  *
  * int main(void) {
  *    while (1) {
  *        hid.read(&recv);
  *        leds = recv.data[0];
  *    }
  * }
  * @endcode
  */
 
 class USBHID: public USBDevice {
 public:
 
     /**
     * Basic constructor
     *
     * Construct this object optionally connecting and blocking until it is ready.
     *
     * @note Do not use this constructor in derived classes.
     *
     * @param connect_blocking true to perform a blocking connect, false to start in a disconnected state
     * @param output_report_length Maximum length of a sent report (up to 64 bytes)
     * @param input_report_length Maximum length of a received report (up to 64 bytes)
     * @param vendor_id Your vendor_id
     * @param product_id Your product_id
     * @param product_release Your product_release
     */
     USBHID(bool connect_blocking = true, uint8_t output_report_length = 64, uint8_t input_report_length = 64, uint16_t vendor_id = 0x1234, uint16_t product_id = 0x0006, uint16_t product_release = 0x0001);
 
     /**
     * Fully featured constructor
     *
     * Construct this object with the supplied USBPhy and parameters. The user
     * this object is responsible for calling connect() or init().
     *
     * @note Derived classes must use this constructor and call init() or
     * connect() themselves. Derived classes should also call deinit() in
     * their destructor. This ensures that no interrupts can occur when the
     * object is partially constructed or destroyed.
     *
     * @param phy USB phy to use
     * @param output_report_length Maximum length of a sent report (up to 64 bytes)
     * @param input_report_length Maximum length of a received report (up to 64 bytes)
     * @param vendor_id Your vendor_id
     * @param product_id Your product_id
     * @param product_release Your product_release
     */
     USBHID(USBPhy *phy, uint8_t output_report_length, uint8_t input_report_length, uint16_t vendor_id, uint16_t product_id, uint16_t product_release);
 
     /**
      * Destroy this object
      *
      * Any classes which inherit from this class must call deinit
      * before this destructor runs.
      */
     virtual ~USBHID();
 
     /**
      * Check if this class is ready
      *
      * @return true if the device is in the configured state
      */
     bool ready();
 
     /**
      * Block until this HID device is in the configured state
      */
     void wait_ready();
 
     /**
     * Send a Report. warning: blocking
     *
     * @param report Report which will be sent (a report is defined by all data and the length)
     * @returns true if successful
     */
     bool send(const HID_REPORT *report);
 
 
     /**
     * Send a Report. warning: non blocking
     *
     * @param report Report which will be sent (a report is defined by all data and the length)
     * @returns true if successful
     */
     bool send_nb(const HID_REPORT *report);
 
     /**
     * Read a report: blocking
     *
     * @param report pointer to the report to fill
     * @returns true if successful
     */
     bool read(HID_REPORT *report);
 
     /**
     * Read a report: non blocking
     *
     * @param report pointer to the report to fill
     * @returns true if successful
     */
     bool read_nb(HID_REPORT *report);
 
 protected:
     uint16_t reportLength;
     uint8_t reportDescriptor[27];
 
     /*
     * Get the Report descriptor
     *
     * @returns pointer to the report descriptor
     */
     virtual const uint8_t *report_desc();
 
     /*
     * Get the length of the report descriptor
     *
     * @returns the length of the report descriptor
     */
     virtual uint16_t report_desc_length();
 
     /*
     * Get string product descriptor
     *
     * @returns pointer to the string product descriptor
     */
     virtual const uint8_t *string_iproduct_desc();
 
     /*
     * Get string interface descriptor
     *
     * @returns pointer to the string interface descriptor
     */
     virtual const uint8_t *string_iinterface_desc();
 
     /*
     * Get configuration descriptor
     *
     * @returns pointer to the configuration descriptor
     */
     virtual const uint8_t *configuration_desc(uint8_t index);
 
 
     /*
     * HID Report received by SET_REPORT request. Warning: Called in ISR context
     * First byte of data will be the report ID
     *
     * @param report Data and length received
     */
     virtual void HID_callbackSetReport(HID_REPORT *report) {};
 
     /**
     * Called when USB changes state
     *
     * @param new_state The new state of the USBDevice
     *
     * Warning: Called in ISR context
     */
     virtual void callback_state_change(DeviceState new_state);
 
     /*
     * This is used to handle extensions to standard requests
     * and class specific requests
     */
     virtual void callback_request(const setup_packet_t *setup);
 
     /*
     * This is used to handle extensions to standard requests
     * and class specific requests with a data phase
     */
     virtual void callback_request_xfer_done(const setup_packet_t *setup, bool aborted);
 
 
     /*
     * Called by USBDevice layer. Set configuration of the device.
     * For instance, you can add all endpoints that you need on this function.
     *
     * @param configuration Number of the configuration
     * @returns true if class handles this request
     */
     virtual void callback_set_configuration(uint8_t configuration);
 
     /*
     * Called by USBDevice layer in response to set_interface.
     *
     * Upon reception of this command endpoints of any previous interface
     * if any must be removed with endpoint_remove and new endpoint added with
     * endpoint_add.
     *
     * @param configuration Number of the configuration
     *
     * Warning: Called in ISR context
     */
     virtual void callback_set_interface(uint16_t interface, uint8_t alternate);
 
     /*
      * Called when there is a hid report that can be read
      */
     virtual void report_rx() {}
 
     /*
      * Called when there is space to send a hid report
      */
     virtual void report_tx() {}
 
 protected:
     usb_ep_t _int_in;
     usb_ep_t _int_out;
 
 private:
     void _init(uint8_t output_report_length, uint8_t input_report_length);
     void _send_isr();
     void _read_isr();
 
     class AsyncSend;
     class AsyncRead;
     class AsyncWait;
 
     OperationList<AsyncWait> _connect_list;
     OperationList<AsyncSend> _send_list;
     bool _send_idle;
     OperationList<AsyncRead> _read_list;
     bool _read_idle;
 
     uint8_t _configuration_descriptor[41];
     HID_REPORT _input_report;
     HID_REPORT _output_report;
     uint8_t _output_length;
     uint8_t _input_length;
 
 
 };
 
 #endif
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