Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Printer Device commands, to send/receive data to and from an attached USB
  34  *  printer, and to send and receive Printer Class control requests.
  35  */
  36
  37 #include "PrinterCommands.h"
  38
  39 /** Sends the given data directly to the printer via the data endpoints, for the sending of print commands in printer
  40  *  languages accepted by the attached printer (e.g. PCL).
  41  *
  42  *  \param[in] PrinterCommands  Pointer to the data to send to the attached printer
  43  *  \param[in] CommandSize  Size of the data to send to the attached printer
  44  *
  45  *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
  46  */
  47 uint8_t Printer_SendData(void* PrinterCommands, uint16_t CommandSize)
  48 {
  49         uint8_t ErrorCode;
  50
  51         Pipe_SelectPipe(PRINTER_DATA_OUT_PIPE);
  52         Pipe_Unfreeze();
  53
  54         if ((ErrorCode = Pipe_Write_Stream_LE(PrinterCommands, CommandSize)) != PIPE_RWSTREAM_NoError)
  55           return ErrorCode;
  56
  57         Pipe_ClearOUT();
  58         while (!(Pipe_IsOUTReady()))
  59         {
  60                 if (USB_HostState == HOST_STATE_Unattached)
  61                   return PIPE_RWSTREAM_DeviceDisconnected;
  62         }
  63
  64         Pipe_Freeze();
  65
  66         return PIPE_RWSTREAM_NoError;
  67 }
  68
  69 /** Issues a Printer class Get Device ID command to the attached device, to retrieve the device ID string (which indicates
  70  *  the accepted printer languages, the printer's model and other pertinent information).
  71  *
  72  *  \param[out] DeviceIDString Pointer to the destination where the returned string should be stored
  73  *  \param[in] BufferSize  Size in bytes of the allocated buffer for the returned Device ID string
  74  *
  75  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
  76  */
  77 uint8_t Printer_GetDeviceID(char* DeviceIDString, uint16_t BufferSize)
  78 {
  79         uint8_t  ErrorCode = HOST_SENDCONTROL_Successful;
  80         uint16_t DeviceIDStringLength = 0;
  81
  82         USB_ControlRequest = (USB_Request_Header_t)
  83                 {
  84                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
  85                         .bRequest      = REQ_GetDeviceID,
  86                         .wValue        = 0,
  87                         .wIndex        = 0,
  88                         .wLength       = sizeof(DeviceIDStringLength),
  89                 };
  90
  91         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  92
  93         if ((ErrorCode = USB_Host_SendControlRequest(&DeviceIDStringLength)) != HOST_SENDCONTROL_Successful)
  94           return ErrorCode;
  95
  96         if (!(DeviceIDStringLength))
  97         {
  98                 DeviceIDString[0] = 0x00;
  99                 return HOST_SENDCONTROL_Successful;
 100         }
 101
 102         DeviceIDStringLength = SwapEndian_16(DeviceIDStringLength);
 103
 104         if (DeviceIDStringLength > BufferSize)
 105           DeviceIDStringLength = BufferSize;
 106
 107         USB_ControlRequest.wLength = DeviceIDStringLength;
 108
 109         if ((ErrorCode = USB_Host_SendControlRequest(DeviceIDString)) != HOST_SENDCONTROL_Successful)
 110           return ErrorCode;
 111
 112         /* Move string back two characters to remove the string length value from the start of the array */
 113         memmove(&DeviceIDString[0], &DeviceIDString[2], DeviceIDStringLength - 2);
 114
 115         DeviceIDString[DeviceIDStringLength - 2] = 0x00;
 116
 117         return HOST_SENDCONTROL_Successful;
 118 }
 119
 120 /** Issues a Printer class Get Port Status command to the attached device, to retrieve the current status flags of the
 121  *  printer.
 122  *
 123  *  \param[out] PortStatus  Pointer to the destination where the printer's status flag values should be stored
 124  *
 125  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
 126  */
 127 uint8_t Printer_GetPortStatus(uint8_t* PortStatus)
 128 {
 129         USB_ControlRequest = (USB_Request_Header_t)
 130                 {
 131                         bmRequestType: (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 132                         bRequest:      REQ_GetPortStatus,
 133                         wValue:        0,
 134                         wIndex:        0,
 135                         wLength:       sizeof(uint8_t),
 136                 };
 137
 138         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 139
 140         return USB_Host_SendControlRequest(PortStatus);
 141 }
 142
 143 /** Issues a Printer class Soft Reset command to the attached device, to reset the printer ready for new input without
 144  *  physically cycling the printer's power.
 145  *
 146  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
 147  */
 148 uint8_t Printer_SoftReset(void)
 149 {
 150         USB_ControlRequest = (USB_Request_Header_t)
 151                 {
 152                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 153                         .bRequest      = REQ_SoftReset,
 154                         .wValue        = 0,
 155                         .wIndex        = 0,
 156                         .wLength       = 0,
 157                 };
 158
 159         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 160
 161         return USB_Host_SendControlRequest(NULL);
 162 }
 163