protocol/lufa/LUFA-git/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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(const void* const PrinterCommands,
  48                          const uint16_t CommandSize)
  49 {
  50         uint8_t ErrorCode;
  51
  52         Pipe_SelectPipe(PRINTER_DATA_OUT_PIPE);
  53         Pipe_Unfreeze();
  54
  55         if ((ErrorCode = Pipe_Write_Stream_LE(PrinterCommands, CommandSize, NULL)) != PIPE_RWSTREAM_NoError)
  56           return ErrorCode;
  57
  58         Pipe_ClearOUT();
  59
  60         Pipe_WaitUntilReady();
  61
  62         Pipe_Freeze();
  63
  64         return PIPE_RWSTREAM_NoError;
  65 }
  66
  67 /** Issues a Printer class Get Device ID command to the attached device, to retrieve the device ID string (which indicates
  68  *  the accepted printer languages, the printer's model and other pertinent information).
  69  *
  70  *  \param[out] DeviceIDString Pointer to the destination where the returned string should be stored
  71  *  \param[in] BufferSize  Size in bytes of the allocated buffer for the returned Device ID string
  72  *
  73  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
  74  */
  75 uint8_t Printer_GetDeviceID(char* DeviceIDString,
  76                             const uint16_t BufferSize)
  77 {
  78         uint8_t  ErrorCode;
  79         uint16_t DeviceIDStringLength = 0;
  80
  81         USB_ControlRequest = (USB_Request_Header_t)
  82                 {
  83                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
  84                         .bRequest      = PRNT_REQ_GetDeviceID,
  85                         .wValue        = 0,
  86                         .wIndex        = PrinterInterfaceNumber,
  87                         .wLength       = sizeof(DeviceIDStringLength),
  88                 };
  89
  90         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  91
  92         if ((ErrorCode = USB_Host_SendControlRequest(&DeviceIDStringLength)) != HOST_SENDCONTROL_Successful)
  93           return ErrorCode;
  94
  95         if (!(DeviceIDStringLength))
  96         {
  97                 DeviceIDString[0] = 0x00;
  98                 return HOST_SENDCONTROL_Successful;
  99         }
 100
 101         DeviceIDStringLength = SwapEndian_16(DeviceIDStringLength);
 102
 103         if (DeviceIDStringLength > BufferSize)
 104           DeviceIDStringLength = BufferSize;
 105
 106         USB_ControlRequest.wLength = DeviceIDStringLength;
 107
 108         if ((ErrorCode = USB_Host_SendControlRequest(DeviceIDString)) != HOST_SENDCONTROL_Successful)
 109           return ErrorCode;
 110
 111         /* Move string back two characters to remove the string length value from the start of the array */
 112         memmove(&DeviceIDString[0], &DeviceIDString[2], DeviceIDStringLength - 2);
 113
 114         DeviceIDString[DeviceIDStringLength - 2] = 0x00;
 115
 116         return HOST_SENDCONTROL_Successful;
 117 }
 118
 119 /** Issues a Printer class Get Port Status command to the attached device, to retrieve the current status flags of the
 120  *  printer.
 121  *
 122  *  \param[out] PortStatus  Pointer to the destination where the printer's status flag values should be stored
 123  *
 124  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
 125  */
 126 uint8_t Printer_GetPortStatus(uint8_t* const PortStatus)
 127 {
 128         USB_ControlRequest = (USB_Request_Header_t)
 129                 {
 130                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 131                         .bRequest      = PRNT_REQ_GetPortStatus,
 132                         .wValue        = 0,
 133                         .wIndex        = PrinterInterfaceNumber,
 134                         .wLength       = sizeof(uint8_t),
 135                 };
 136
 137         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 138
 139         return USB_Host_SendControlRequest(PortStatus);
 140 }
 141
 142 /** Issues a Printer class Soft Reset command to the attached device, to reset the printer ready for new input without
 143  *  physically cycling the printer's power.
 144  *
 145  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
 146  */
 147 uint8_t Printer_SoftReset(void)
 148 {
 149         USB_ControlRequest = (USB_Request_Header_t)
 150                 {
 151                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 152                         .bRequest      = PRNT_REQ_SoftReset,
 153                         .wValue        = 0,
 154                         .wIndex        = PrinterInterfaceNumber,
 155                         .wLength       = 0,
 156                 };
 157
 158         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 159
 160         return USB_Host_SendControlRequest(NULL);
 161 }
 162