1 /***********************************************************************
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2 * $Id:: mw_usbd_cdcuser.h 331 2012-08-09 18:54:34Z usb10131 $
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4 * Project: USB device ROM Stack
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7 * USB Communication Device Class User module Definitions.
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9 ***********************************************************************
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10 * Copyright(C) 2011, NXP Semiconductor
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11 * All rights reserved.
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13 * Software that is described herein is for illustrative purposes only
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14 * which provides customers with programming information regarding the
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15 * products. This software is supplied "AS IS" without any warranties.
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16 * NXP Semiconductors assumes no responsibility or liability for the
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17 * use of the software, conveys no license or title under any patent,
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18 * copyright, or mask work right to the product. NXP Semiconductors
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19 * reserves the right to make changes in the software without
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20 * notification. NXP Semiconductors also make no representation or
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21 * warranty that such application will be suitable for the specified
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22 * use without further testing or modification.
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23 **********************************************************************/
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24 #ifndef __CDCUSER_H__
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25 #define __CDCUSER_H__
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29 #include "usbd_cdc.h"
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32 * \brief Communication Device Class (CDC) API structures and function prototypes.
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34 * Definition of functions exported by ROM based CDC function driver.
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38 /** \ingroup Group_USBD
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39 * @defgroup USBD_CDC Communication Device Class (CDC) Function Driver
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40 * \section Sec_CDCModDescription Module Description
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41 * CDC Class Function Driver module. This module contains an internal implementation of the USB CDC Class.
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43 * User applications can use this class driver instead of implementing the CDC-ACM class manually
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44 * via the low-level USBD_HW and USBD_Core APIs.
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46 * This module is designed to simplify the user code by exposing only the required interface needed to interface with
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47 * Devices using the USB CDC-ACM Class.
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50 /*----------------------------------------------------------------------------
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51 We need a buffer for incoming data on USB port because USB receives
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52 much faster than UART transmits
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53 *---------------------------------------------------------------------------*/
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55 #define CDC_BUF_SIZE (128) /* Output buffer in bytes (power 2) */
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56 /* large enough for file transfer */
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57 #define CDC_BUF_MASK (CDC_BUF_SIZE-1ul)
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59 /** \brief Communication Device Class function driver initialization parameter data structure.
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62 * \details This data structure is used to pass initialization parameters to the
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63 * Communication Device Class function driver's init function.
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66 typedef struct USBD_CDC_INIT_PARAM
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68 /* memory allocation params */
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69 uint32_t mem_base; /**< Base memory location from where the stack can allocate
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70 data and buffers. \note The memory address set in this field
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71 should be accessible by USB DMA controller. Also this value
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72 should be aligned on 4 byte boundary.
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74 uint32_t mem_size; /**< The size of memory buffer which stack can use.
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75 \note The \em mem_size should be greater than the size
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76 returned by USBD_CDC_API::GetMemSize() routine.*/
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77 /** Pointer to the control interface descriptor within the descriptor
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78 * array (\em high_speed_desc) passed to Init() through \ref USB_CORE_DESCS_T
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79 * structure. The stack assumes both HS and FS use same BULK endpoints.
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81 uint8_t* cif_intf_desc;
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82 /** Pointer to the data interface descriptor within the descriptor
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83 * array (\em high_speed_desc) passed to Init() through \ref USB_CORE_DESCS_T
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84 * structure. The stack assumes both HS and FS use same BULK endpoints.
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86 uint8_t* dif_intf_desc;
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88 /* user defined functions */
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90 /* required functions */
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92 * Communication Interface Class specific get request call-back function.
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94 * This function is provided by the application software. This function gets called
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95 * when host sends CIC management element get requests.
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96 * \note Applications implementing Abstract Control Model subclass can set this
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97 * param to NULL. As the default driver parses ACM requests and calls the
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98 * individual ACM call-back routines defined in this structure. For all other subclasses
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99 * this routine should be provided by the application.
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101 * The setup packet data (\em pSetup) is passed to the call-back so that application
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102 * can extract the CIC request type and other associated data. By default the stack
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103 * will assign \em pBuffer pointer to \em EP0Buff allocated at init. The application
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104 * code can directly write data into this buffer as long as data is less than 64 byte.
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105 * If more data has to be sent then application code should update \em pBuffer pointer
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106 * and length accordingly.
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109 * \param[in] hCdc Handle to CDC function driver.
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110 * \param[in] pSetup Pointer to setup packet received from host.
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111 * \param[in, out] pBuffer Pointer to a pointer of data buffer containing request data.
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112 * Pointer-to-pointer is used to implement zero-copy buffers.
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113 * See \ref USBD_ZeroCopy for more details on zero-copy concept.
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114 * \param[in, out] length Amount of data to be sent back to host.
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115 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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116 * \retval LPC_OK On success.
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117 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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118 * \retval ERR_USBD_xxx For other error conditions.
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121 ErrorCode_t (*CIC_GetRequest)( USBD_HANDLE_T hHid, USB_SETUP_PACKET* pSetup, uint8_t** pBuffer, uint16_t* length);
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124 * Communication Interface Class specific set request call-back function.
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126 * This function is provided by the application software. This function gets called
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127 * when host sends a CIC management element requests.
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128 * \note Applications implementing Abstract Control Model subclass can set this
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129 * param to NULL. As the default driver parses ACM requests and calls the
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130 * individual ACM call-back routines defined in this structure. For all other subclasses
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131 * this routine should be provided by the application.
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133 * The setup packet data (\em pSetup) is passed to the call-back so that application can
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134 * extract the CIC request type and other associated data. If a set request has data associated,
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135 * then this call-back is called twice.
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136 * -# First when setup request is received, at this time application code could update
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137 * \em pBuffer pointer to point to the intended destination. The length param is set to 0
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138 * so that application code knows this is first time. By default the stack will
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139 * assign \em pBuffer pointer to \em EP0Buff allocated at init. Note, if data length is
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140 * greater than 64 bytes and application code doesn't update \em pBuffer pointer the
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141 * stack will send STALL condition to host.
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142 * -# Second when the data is received from the host. This time the length param is set
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143 * with number of data bytes received.
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145 * \param[in] hCdc Handle to CDC function driver.
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146 * \param[in] pSetup Pointer to setup packet received from host.
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147 * \param[in, out] pBuffer Pointer to a pointer of data buffer containing request data.
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148 * Pointer-to-pointer is used to implement zero-copy buffers.
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149 * See \ref USBD_ZeroCopy for more details on zero-copy concept.
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150 * \param[in] length Amount of data copied to destination buffer.
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151 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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152 * \retval LPC_OK On success.
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153 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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154 * \retval ERR_USBD_xxx For other error conditions.
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157 ErrorCode_t (*CIC_SetRequest)( USBD_HANDLE_T hCdc, USB_SETUP_PACKET* pSetup, uint8_t** pBuffer, uint16_t length);
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160 * Communication Device Class specific BULK IN endpoint handler.
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162 * The application software should provide the BULK IN endpoint handler.
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163 * Applications should transfer data depending on the communication protocol type set in descriptors.
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167 * \param[in] hUsb Handle to the USB device stack.
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168 * \param[in] data Pointer to the data which will be passed when callback function is called by the stack.
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169 * \param[in] event Type of endpoint event. See \ref USBD_EVENT_T for more details.
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170 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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171 * \retval LPC_OK On success.
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172 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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173 * \retval ERR_USBD_xxx For other error conditions.
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176 ErrorCode_t (*CDC_BulkIN_Hdlr) (USBD_HANDLE_T hUsb, void* data, uint32_t event);
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179 * Communication Device Class specific BULK OUT endpoint handler.
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181 * The application software should provide the BULK OUT endpoint handler.
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182 * Applications should transfer data depending on the communication protocol type set in descriptors.
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186 * \param[in] hUsb Handle to the USB device stack.
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187 * \param[in] data Pointer to the data which will be passed when callback function is called by the stack.
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188 * \param[in] event Type of endpoint event. See \ref USBD_EVENT_T for more details.
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189 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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190 * \retval LPC_OK On success.
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191 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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192 * \retval ERR_USBD_xxx For other error conditions.
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195 ErrorCode_t (*CDC_BulkOUT_Hdlr) (USBD_HANDLE_T hUsb, void* data, uint32_t event);
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198 * Abstract control model(ACM) subclass specific SEND_ENCAPSULATED_COMMAND request call-back function.
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200 * This function is provided by the application software. This function gets called
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201 * when host sends a SEND_ENCAPSULATED_COMMAND set request.
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203 * \param[in] hCdc Handle to CDC function driver.
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204 * \param[in] buffer Pointer to the command buffer.
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205 * \param[in] len Length of the command buffer.
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206 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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207 * \retval LPC_OK On success.
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208 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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209 * \retval ERR_USBD_xxx For other error conditions.
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212 ErrorCode_t (*SendEncpsCmd) (USBD_HANDLE_T hCDC, uint8_t* buffer, uint16_t len);
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215 * Abstract control model(ACM) subclass specific GET_ENCAPSULATED_RESPONSE request call-back function.
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217 * This function is provided by the application software. This function gets called
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218 * when host sends a GET_ENCAPSULATED_RESPONSE request.
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220 * \param[in] hCdc Handle to CDC function driver.
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221 * \param[in, out] buffer Pointer to a pointer of data buffer containing response data.
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222 * Pointer-to-pointer is used to implement zero-copy buffers.
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223 * See \ref USBD_ZeroCopy for more details on zero-copy concept.
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224 * \param[in, out] len Amount of data to be sent back to host.
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225 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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226 * \retval LPC_OK On success.
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227 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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228 * \retval ERR_USBD_xxx For other error conditions.
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231 ErrorCode_t (*GetEncpsResp) (USBD_HANDLE_T hCDC, uint8_t** buffer, uint16_t* len);
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234 * Abstract control model(ACM) subclass specific SET_COMM_FEATURE request call-back function.
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236 * This function is provided by the application software. This function gets called
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237 * when host sends a SET_COMM_FEATURE set request.
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239 * \param[in] hCdc Handle to CDC function driver.
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240 * \param[in] feature Communication feature type. See usbcdc11.pdf, section 6.2.4, Table 47.
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241 * \param[in] buffer Pointer to the settings buffer for the specified communication feature.
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242 * \param[in] len Length of the request buffer.
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243 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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244 * \retval LPC_OK On success.
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245 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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246 * \retval ERR_USBD_xxx For other error conditions.
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249 ErrorCode_t (*SetCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature, uint8_t* buffer, uint16_t len);
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252 * Abstract control model(ACM) subclass specific GET_COMM_FEATURE request call-back function.
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254 * This function is provided by the application software. This function gets called
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255 * when host sends a GET_ENCAPSULATED_RESPONSE request.
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257 * \param[in] hCdc Handle to CDC function driver.
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258 * \param[in] feature Communication feature type. See usbcdc11.pdf, section 6.2.4, Table 47.
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259 * \param[in, out] buffer Pointer to a pointer of data buffer containing current settings
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260 * for the communication feature.
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261 * Pointer-to-pointer is used to implement zero-copy buffers.
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262 * \param[in, out] len Amount of data to be sent back to host.
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263 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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264 * \retval LPC_OK On success.
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265 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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266 * \retval ERR_USBD_xxx For other error conditions.
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269 ErrorCode_t (*GetCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature, uint8_t** pBuffer, uint16_t* len);
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272 * Abstract control model(ACM) subclass specific CLEAR_COMM_FEATURE request call-back function.
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274 * This function is provided by the application software. This function gets called
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275 * when host sends a CLEAR_COMM_FEATURE request. In the call-back the application
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276 * should Clears the settings for a particular communication feature.
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278 * \param[in] hCdc Handle to CDC function driver.
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279 * \param[in] feature Communication feature type. See usbcdc11.pdf, section 6.2.4, Table 47.
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280 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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281 * \retval LPC_OK On success.
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282 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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283 * \retval ERR_USBD_xxx For other error conditions.
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286 ErrorCode_t (*ClrCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature);
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289 * Abstract control model(ACM) subclass specific SET_CONTROL_LINE_STATE request call-back function.
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291 * This function is provided by the application software. This function gets called
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292 * when host sends a SET_CONTROL_LINE_STATE request. RS-232 signal used to tell the DCE
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293 * device the DTE device is now present
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295 * \param[in] hCdc Handle to CDC function driver.
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296 * \param[in] state The state value uses bitmap values defined in usbcdc11.pdf,
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297 * section 6.2.14, Table 51.
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298 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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299 * \retval LPC_OK On success.
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300 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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301 * \retval ERR_USBD_xxx For other error conditions.
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304 ErrorCode_t (*SetCtrlLineState) (USBD_HANDLE_T hCDC, uint16_t state);
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307 * Abstract control model(ACM) subclass specific SEND_BREAK request call-back function.
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309 * This function is provided by the application software. This function gets called
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310 * when host sends a SEND_BREAK request.
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312 * \param[in] hCdc Handle to CDC function driver.
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313 * \param[in] mstime Duration of Break signal in milliseconds. If mstime is FFFFh, then
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314 * the application should send break until another SendBreak request is received
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315 * with the wValue of 0000h.
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316 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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317 * \retval LPC_OK On success.
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318 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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319 * \retval ERR_USBD_xxx For other error conditions.
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322 ErrorCode_t (*SendBreak) (USBD_HANDLE_T hCDC, uint16_t mstime);
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325 * Abstract control model(ACM) subclass specific SET_LINE_CODING request call-back function.
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327 * This function is provided by the application software. This function gets called
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328 * when host sends a SET_LINE_CODING request. The application should configure the device
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329 * per DTE rate, stop-bits, parity, and number-of-character bits settings provided in
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330 * command buffer. See usbcdc11.pdf, section 6.2.13, table 50 for detail of the command buffer.
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332 * \param[in] hCdc Handle to CDC function driver.
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333 * \param[in] line_coding Pointer to the CDC_LINE_CODING command buffer.
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334 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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335 * \retval LPC_OK On success.
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336 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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337 * \retval ERR_USBD_xxx For other error conditions.
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340 ErrorCode_t (*SetLineCode) (USBD_HANDLE_T hCDC, CDC_LINE_CODING* line_coding);
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343 * Optional Communication Device Class specific INTERRUPT IN endpoint handler.
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345 * The application software should provide the INT IN endpoint handler.
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346 * Applications should transfer data depending on the communication protocol type set in descriptors.
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350 * \param[in] hUsb Handle to the USB device stack.
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351 * \param[in] data Pointer to the data which will be passed when callback function is called by the stack.
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352 * \param[in] event Type of endpoint event. See \ref USBD_EVENT_T for more details.
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353 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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354 * \retval LPC_OK On success.
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355 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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356 * \retval ERR_USBD_xxx For other error conditions.
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359 ErrorCode_t (*CDC_InterruptEP_Hdlr) (USBD_HANDLE_T hUsb, void* data, uint32_t event);
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362 * Optional user override-able function to replace the default CDC class handler.
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364 * The application software could override the default EP0 class handler with their
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365 * own by providing the handler function address as this data member of the parameter
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366 * structure. Application which like the default handler should set this data member
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367 * to zero before calling the USBD_CDC_API::Init().
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371 * \param[in] hUsb Handle to the USB device stack.
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372 * \param[in] data Pointer to the data which will be passed when callback function is called by the stack.
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373 * \param[in] event Type of endpoint event. See \ref USBD_EVENT_T for more details.
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374 * \return The call back should returns \ref ErrorCode_t type to indicate success or error condition.
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375 * \retval LPC_OK On success.
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376 * \retval ERR_USBD_UNHANDLED Event is not handled hence pass the event to next in line.
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377 * \retval ERR_USBD_xxx For other error conditions.
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380 ErrorCode_t (*CDC_Ep0_Hdlr) (USBD_HANDLE_T hUsb, void* data, uint32_t event);
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382 } USBD_CDC_INIT_PARAM_T;
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384 /** \brief CDC class API functions structure.
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385 * \ingroup USBD_CDC
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387 * This module exposes functions which interact directly with USB device controller hardware.
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390 typedef struct USBD_CDC_API
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392 /** \fn uint32_t GetMemSize(USBD_CDC_INIT_PARAM_T* param)
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393 * Function to determine the memory required by the CDC function driver module.
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395 * This function is called by application layer before calling pUsbApi->CDC->Init(), to allocate memory used
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396 * by CDC function driver module. The application should allocate the memory which is accessible by USB
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397 * controller/DMA controller.
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398 * \note Some memory areas are not accessible by all bus masters.
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400 * \param[in] param Structure containing CDC function driver module initialization parameters.
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401 * \return Returns the required memory size in bytes.
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403 uint32_t (*GetMemSize)(USBD_CDC_INIT_PARAM_T* param);
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405 /** \fn ErrorCode_t init(USBD_HANDLE_T hUsb, USBD_CDC_INIT_PARAM_T* param)
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406 * Function to initialize CDC function driver module.
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408 * This function is called by application layer to initialize CDC function driver module.
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410 * \param[in] hUsb Handle to the USB device stack.
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411 * \param[in, out] param Structure containing CDC function driver module initialization parameters.
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412 * \return Returns \ref ErrorCode_t type to indicate success or error condition.
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413 * \retval LPC_OK On success
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414 * \retval ERR_USBD_BAD_MEM_BUF Memory buffer passed is not 4-byte
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415 * aligned or smaller than required.
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416 * \retval ERR_API_INVALID_PARAM2 Either CDC_Write() or CDC_Read() or
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417 * CDC_Verify() callbacks are not defined.
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418 * \retval ERR_USBD_BAD_INTF_DESC Wrong interface descriptor is passed.
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419 * \retval ERR_USBD_BAD_EP_DESC Wrong endpoint descriptor is passed.
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421 ErrorCode_t (*init)(USBD_HANDLE_T hUsb, USBD_CDC_INIT_PARAM_T* param, USBD_HANDLE_T* phCDC);
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423 /** \fn ErrorCode_t SendNotification(USBD_HANDLE_T hCdc, uint8_t bNotification, uint16_t data)
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424 * Function to send CDC class notifications to host.
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426 * This function is called by application layer to send CDC class notifications to host.
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427 * See usbcdc11.pdf, section 6.3, Table 67 for various notification types the CDC device can send.
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428 * \note The current version of the driver only supports following notifications allowed by ACM subclass:
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429 * CDC_NOTIFICATION_NETWORK_CONNECTION, CDC_RESPONSE_AVAILABLE, CDC_NOTIFICATION_SERIAL_STATE.
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431 * For all other notifications application should construct the notification buffer appropriately
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432 * and call hw->USB_WriteEP() for interrupt endpoint associated with the interface.
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434 * \param[in] hCdc Handle to CDC function driver.
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435 * \param[in] bNotification Notification type allowed by ACM subclass. Should be CDC_NOTIFICATION_NETWORK_CONNECTION,
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436 * CDC_RESPONSE_AVAILABLE or CDC_NOTIFICATION_SERIAL_STATE. For all other types ERR_API_INVALID_PARAM2
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437 * is returned. See usbcdc11.pdf, section 3.6.2.1, table 5.
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438 * \param[in] data Data associated with notification.
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439 * \n For CDC_NOTIFICATION_NETWORK_CONNECTION a non-zero data value is interpreted as connected state.
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440 * \n For CDC_RESPONSE_AVAILABLE this parameter is ignored.
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441 * \n For CDC_NOTIFICATION_SERIAL_STATE the data should use bitmap values defined in usbcdc11.pdf,
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442 * section 6.3.5, Table 69.
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443 * \return Returns \ref ErrorCode_t type to indicate success or error condition.
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444 * \retval LPC_OK On success
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445 * \retval ERR_API_INVALID_PARAM2 If unsupported notification type is passed.
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448 ErrorCode_t (*SendNotification)(USBD_HANDLE_T hCdc, uint8_t bNotification, uint16_t data);
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452 /*-----------------------------------------------------------------------------
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453 * Private functions & structures prototypes
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454 *-----------------------------------------------------------------------------*/
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455 /** @cond ADVANCED_API */
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457 typedef struct _CDC_CTRL_T
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459 USB_CORE_CTRL_T* pUsbCtrl;
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460 /* notification buffer */
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461 uint8_t notice_buf[12];
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462 CDC_LINE_CODING line_coding;
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465 uint8_t cif_num; /* control interface number */
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466 uint8_t dif_num; /* data interface number */
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467 uint8_t epin_num; /* BULK IN endpoint number */
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468 uint8_t epout_num; /* BULK OUT endpoint number */
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469 uint8_t epint_num; /* Interrupt IN endpoint number */
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471 /* user defined functions */
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472 ErrorCode_t (*SendEncpsCmd) (USBD_HANDLE_T hCDC, uint8_t* buffer, uint16_t len);
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473 ErrorCode_t (*GetEncpsResp) (USBD_HANDLE_T hCDC, uint8_t** buffer, uint16_t* len);
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474 ErrorCode_t (*SetCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature, uint8_t* buffer, uint16_t len);
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475 ErrorCode_t (*GetCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature, uint8_t** pBuffer, uint16_t* len);
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476 ErrorCode_t (*ClrCommFeature) (USBD_HANDLE_T hCDC, uint16_t feature);
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477 ErrorCode_t (*SetCtrlLineState) (USBD_HANDLE_T hCDC, uint16_t state);
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478 ErrorCode_t (*SendBreak) (USBD_HANDLE_T hCDC, uint16_t state);
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479 ErrorCode_t (*SetLineCode) (USBD_HANDLE_T hCDC, CDC_LINE_CODING* line_coding);
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481 /* virtual functions */
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482 ErrorCode_t (*CIC_GetRequest)( USBD_HANDLE_T hHid, USB_SETUP_PACKET* pSetup, uint8_t** pBuffer, uint16_t* length);
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483 ErrorCode_t (*CIC_SetRequest)( USBD_HANDLE_T hCdc, USB_SETUP_PACKET* pSetup, uint8_t** pBuffer, uint16_t length);
\r
487 /** @cond DIRECT_API */
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488 extern uint32_t mwCDC_GetMemSize(USBD_CDC_INIT_PARAM_T* param);
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489 extern ErrorCode_t mwCDC_init(USBD_HANDLE_T hUsb, USBD_CDC_INIT_PARAM_T* param, USBD_HANDLE_T* phCDC);
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490 extern ErrorCode_t mwCDC_SendNotification (USBD_HANDLE_T hCdc, uint8_t bNotification, uint16_t data);
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499 #endif /* __CDCUSER_H__ */
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