KeyboardHost.c

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/*
 * @brief Virtual Serial Device and KeyBoard Host
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * Copyright(C) Dean Camera, 2011, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#include "VirtualSerial.h"
#include "KeyboardHost.h"

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/
 
static USB_ClassInfo_HID_Host_t Keyboard_HID_Interface = {
 .Config = {
  .DataINPipeNumber       = 1,
  .DataINPipeDoubleBank   = false,

  .DataOUTPipeNumber      = 2,
  .DataOUTPipeDoubleBank  = false,

  .HIDInterfaceProtocol   = HID_CSCP_KeyboardBootProtocol,
  .PortNumber = 0,
 },
};

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Private functions
 ****************************************************************************/

static void KeyboardHost_Task(void)
{
 if (USB_HostState[Keyboard_HID_Interface.Config.PortNumber] != HOST_STATE_Configured) {
  return;
 }

 if (HID_Host_IsReportReceived(&Keyboard_HID_Interface)) {
  USB_KeyboardReport_Data_t KeyboardReport;
  HID_Host_ReceiveReport(&Keyboard_HID_Interface, &KeyboardReport);

  uint8_t KeyCode = KeyboardReport.KeyCode[0];

  if (KeyCode) {
   char PressedKey = 0;

   /* Retrieve pressed key character if alphanumeric */
   if ((KeyCode >= HID_KEYBOARD_SC_A) && (KeyCode <= HID_KEYBOARD_SC_Z)) {
    PressedKey = (KeyCode - HID_KEYBOARD_SC_A) + 'A';
   }
   else if ((KeyCode >= HID_KEYBOARD_SC_1_AND_EXCLAMATION) &
      (KeyCode  < HID_KEYBOARD_SC_0_AND_CLOSING_PARENTHESIS)) {
    PressedKey = (KeyCode - HID_KEYBOARD_SC_1_AND_EXCLAMATION) + '1';
   }
   else if (KeyCode == HID_KEYBOARD_SC_0_AND_CLOSING_PARENTHESIS) {
    PressedKey = '0';
   }
   else if (KeyCode == HID_KEYBOARD_SC_SPACE) {
    PressedKey = ' ';
   }
   else if (KeyCode == HID_KEYBOARD_SC_ENTER) {
    PressedKey = '\n';
   }

   if (PressedKey) {
    VirtualSerial_putchar(PressedKey);
   }
  }
 }
}

/*****************************************************************************
 * Public functions
 ****************************************************************************/

void KeyboardHost(void)
{
 static int initialized = 0;

 /* Initialize the keyboard host driver once */
 if (!initialized) {
  USB_Init(Keyboard_HID_Interface.Config.PortNumber, USB_MODE_Host);
  initialized = 1;
 }

 KeyboardHost_Task();

 HID_Host_USBTask(&Keyboard_HID_Interface);
 USB_USBTask(Keyboard_HID_Interface.Config.PortNumber, USB_MODE_Host);
}

void EVENT_USB_Host_DeviceAttached(const uint8_t corenum)
{
 DEBUGOUT(("Device Attached on port %d\r\n"), corenum);
}

void EVENT_USB_Host_DeviceUnattached(const uint8_t corenum)
{
 DEBUGOUT(("\r\nDevice Unattached on port %d\r\n"), corenum);
}

void EVENT_USB_Host_DeviceEnumerationComplete(const uint8_t corenum)
{
 uint16_t ConfigDescriptorSize;
 uint8_t  ConfigDescriptorData[512];

 if (USB_Host_GetDeviceConfigDescriptor(corenum, 1, &ConfigDescriptorSize, ConfigDescriptorData,
             sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful) {
  DEBUGOUT("Error Retrieving Configuration Descriptor.\r\n");
  return;
 }
 Keyboard_HID_Interface.Config.PortNumber = corenum;

 if (HID_Host_ConfigurePipes(&Keyboard_HID_Interface,
        ConfigDescriptorSize, ConfigDescriptorData) != HID_ENUMERROR_NoError) {
  DEBUGOUT("Attached Device Not a Valid Keyboard.\r\n");
  return;
 }

 if (USB_Host_SetDeviceConfiguration(Keyboard_HID_Interface.Config.PortNumber, 1) != HOST_SENDCONTROL_Successful) {
  DEBUGOUT("Error Setting Device Configuration.\r\n");
  return;
 }

 if (HID_Host_SetBootProtocol(&Keyboard_HID_Interface) != 0) {
  DEBUGOUT("Could not Set Boot Protocol Mode.\r\n");
  USB_Host_SetDeviceConfiguration(Keyboard_HID_Interface.Config.PortNumber, 0);
  return;
 }

 DEBUGOUT("Keyboard Enumerated.\r\n");
}

void EVENT_USB_Host_HostError(const uint8_t corenum, const uint8_t ErrorCode)
{
 USB_Disable(corenum, USB_MODE_Host);

 DEBUGOUT(("Host Mode Error\r\n"
     " -- Error port %d\r\n"
     " -- Error Code %d\r\n" ), corenum, ErrorCode);

 for (;; ) {}
}

void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t corenum,
           const uint8_t ErrorCode,
           const uint8_t SubErrorCode)
{
 DEBUGOUT(("Dev Enum Error\r\n"
     " -- Error port %d\r\n"
     " -- Error Code %d\r\n"
     " -- Sub Error Code %d\r\n"
     " -- In State %d\r\n" ),
    corenum, ErrorCode, SubErrorCode, USB_HostState[corenum]);

}

bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_t *const CurrentItem)
{
 return true;
}