/************************************************************************
  File Information:
    FileName:       usb_function_cdc.h
    Dependencies:   See INCLUDES section
    Processor:      PIC18 or PIC24 USB Microcontrollers
    Hardware:       The code is natively intended to be used on the following
                    hardware platforms: PICDEM™ FS USB Demo Board,
                    PIC18F87J50 FS USB Plug-In Module, or
                    Explorer 16 + PIC24 USB PIM.  The firmware may be
                    modified for use on other USB platforms by editing the
                    HardwareProfile.h file.
    Complier:   Microchip C18 (for PIC18) or C30 (for PIC24)
    Company:        Microchip Technology, Inc.

    Software License Agreement:

    The software supplied herewith by Microchip Technology Incorporated
    (the “Company”) for its PIC® Microcontroller is intended and
    supplied to you, the Company’s customer, for use solely and
    exclusively on Microchip PIC Microcontroller products. The
    software is owned by the Company and/or its supplier, and is
    protected under applicable copyright laws. All rights are reserved.
    Any use in violation of the foregoing restrictions may subject the
    user to criminal sanctions under applicable laws, as well as to
    civil liability for the breach of the terms and conditions of this
    license.

    THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
    WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
    TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
    PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
    IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
    CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.

     Change History:
     Rev         Description
     v2.3        Decricated the mUSBUSARTIsTxTrfReady() macro.  It is 
                 replaced by the USBUSARTIsTxTrfReady() function.

  Summary:
    This file contains all of functions, macros, definitions, variables,
    datatypes, etc. that are required for usage with the CDC function
    driver. This file should be included in projects that use the CDC
    \function driver.  This file should also be included into the 
    usb_descriptors.c file and any other user file that requires access to the
    CDC interface.
    
    
    
    This file is located in the "\<Install Directory\>\\Microchip\\Include\\USB"
    directory.

  Description:
    USB CDC Function Driver File
    
    This file contains all of functions, macros, definitions, variables,
    datatypes, etc. that are required for usage with the CDC function
    driver. This file should be included in projects that use the CDC
    \function driver.  This file should also be included into the 
    usb_descriptors.c file and any other user file that requires access to the
    CDC interface.
    
    This file is located in the "\<Install Directory\>\\Microchip\\Include\\USB"
    directory.
    
    When including this file in a new project, this file can either be
    referenced from the directory in which it was installed or copied
    directly into the user application folder. If the first method is
    chosen to keep the file located in the folder in which it is installed
    then include paths need to be added so that the library and the
    application both know where to reference each others files. If the
    application folder is located in the same folder as the Microchip
    folder (like the current demo folders), then the following include
    paths need to be added to the application's project:
    
    ..\\Include
    
    ..\\..\\Include
    
    ..\\..\\MicrochipInclude
    
    ..\\..\\\<Application Folder\>
    
    ..\\..\\..\\\<Application Folder\>
    
    If a different directory structure is used, modify the paths as
    required. An example using absolute paths instead of relative paths
    would be the following:
    
    C:\\Microchip Solutions\\Microchip\\Include
    
    C:\\Microchip Solutions\\My Demo Application                       

********************************************************************/


#ifndef CDC_H
#define CDC_H

/** I N C L U D E S **********************************************************/
#include "GenericTypeDefs.h"
#include "USB\usb.h"
#include "usb_config.h"

/** D E F I N I T I O N S ****************************************************/

/* Class-Specific Requests */
#define SEND_ENCAPSULATED_COMMAND   0x00
#define GET_ENCAPSULATED_RESPONSE   0x01
#define SET_COMM_FEATURE            0x02
#define GET_COMM_FEATURE            0x03
#define CLEAR_COMM_FEATURE          0x04
#define SET_LINE_CODING             0x20
#define GET_LINE_CODING             0x21
#define SET_CONTROL_LINE_STATE      0x22
#define SEND_BREAK                  0x23

/* Notifications *
 * Note: Notifications are polled over
 * Communication Interface (Interrupt Endpoint)
 */
#define NETWORK_CONNECTION          0x00
#define RESPONSE_AVAILABLE          0x01
#define SERIAL_STATE                0x20


/* Device Class Code */
#define CDC_DEVICE                  0x02

/* Communication Interface Class Code */
#define COMM_INTF                   0x02

/* Communication Interface Class SubClass Codes */
#define ABSTRACT_CONTROL_MODEL      0x02

/* Communication Interface Class Control Protocol Codes */
#define V25TER                      0x01    // Common AT commands ("Hayes(TM)")


/* Data Interface Class Codes */
#define DATA_INTF                   0x0A

/* Data Interface Class Protocol Codes */
#define NO_PROTOCOL                 0x00    // No class specific protocol required


/* Communication Feature Selector Codes */
#define ABSTRACT_STATE              0x01
#define COUNTRY_SETTING             0x02

/* Functional Descriptors */
/* Type Values for the bDscType Field */
#define CS_INTERFACE                0x24
#define CS_ENDPOINT                 0x25

/* bDscSubType in Functional Descriptors */
#define DSC_FN_HEADER               0x00
#define DSC_FN_CALL_MGT             0x01
#define DSC_FN_ACM                  0x02    // ACM - Abstract Control Management
#define DSC_FN_DLM                  0x03    // DLM - Direct Line Managment
#define DSC_FN_TELEPHONE_RINGER     0x04
#define DSC_FN_RPT_CAPABILITIES     0x05
#define DSC_FN_UNION                0x06
#define DSC_FN_COUNTRY_SELECTION    0x07
#define DSC_FN_TEL_OP_MODES         0x08
#define DSC_FN_USB_TERMINAL         0x09
/* more.... see Table 25 in USB CDC Specification 1.1 */

/* CDC Bulk IN transfer states */
#define CDC_TX_READY                0
#define CDC_TX_BUSY                 1
#define CDC_TX_BUSY_ZLP             2       // ZLP: Zero Length Packet
#define CDC_TX_COMPLETING           3

#if defined(USB_CDC_SET_LINE_CODING_HANDLER) 
    #define LINE_CODING_TARGET &cdc_notice.SetLineCoding._byte[0]
    #define LINE_CODING_PFUNC &USB_CDC_SET_LINE_CODING_HANDLER
#else
    #define LINE_CODING_TARGET &line_coding._byte[0]
    #define LINE_CODING_PFUNC NULL
#endif

#if defined(USB_CDC_SUPPORT_HARDWARE_FLOW_CONTROL)
    #define CONFIGURE_RTS(a) UART_RTS = a;
    #define CONFIGURE_DTR(a) UART_DTR = a;
#else
    #define CONFIGURE_RTS(a)
    #define CONFIGURE_DTR(a)
#endif

#if defined(USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D3)
    #error This option is not currently supported.
#else
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D3_VAL 0x00
#endif

#if defined(USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D2)
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D2_VAL 0x04
#else
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D2_VAL 0x00
#endif

#if defined(USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D1)
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D1_VAL 0x02
#else
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D1_VAL 0x00
#endif

#if defined(USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D0)
    #error This option is not currently supported.
#else
    #define USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D0_VAL 0x00
#endif

#define USB_CDC_ACM_FN_DSC_VAL  \
    USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D3_VAL |\
    USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D2_VAL |\
    USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D1_VAL |\
    USB_CDC_SUPPORT_ABSTRACT_CONTROL_MANAGEMENT_CAPABILITIES_D0_VAL

/******************************************************************************
    Function:
        void CDCSetBaudRate(DWORD baudRate)
        
    Summary:
        This macro is used set the baud rate reported back to the host during
        a get line coding request. (optional)

    Description:
        This macro is used set the baud rate reported back to the host during
        a get line coding request.

        Typical Usage:
        <code>
            CDCSetBaudRate(19200);
        </code>

        This function is optional for CDC devices that do not actually convert
        the USB traffic to a hardware UART.
        
    PreCondition:
        None
        
    Parameters:
        DWORD baudRate - The desired baudrate
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define CDCSetBaudRate(baudRate) {line_coding.dwDTERate.Val=baudRate;}

/******************************************************************************
    Function:
        void CDCSetCharacterFormat(BYTE charFormat)
        
    Summary:
        This macro is used manually set the character format reported back to 
        the host during a get line coding request. (optional)

    Description:
        This macro is used manually set the character format reported back to 
        the host during a get line coding request.

        Typical Usage:
        <code>
            CDCSetCharacterFormat(19200);
        </code>
        
        This function is optional for CDC devices that do not actually convert
        the USB traffic to a hardware UART.

    PreCondition:
        None
        
    Parameters:
        BYTE charFormat - number of stop bits.  Available options are:
         * NUM_STOP_BITS_1 - 1 Stop bit
         * NUM_STOP_BITS_1_5 - 1.5 Stop bits
         * NUM_STOP_BITS_2 - 2 Stop bits
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define CDCSetCharacterFormat(charFormat) {line_coding.bCharFormat=charFormat;}
#define NUM_STOP_BITS_1     0   //1 stop bit - used by CDCSetLineCoding() and CDCSetCharacterFormat()
#define NUM_STOP_BITS_1_5   1   //1.5 stop bit - used by CDCSetLineCoding() and CDCSetCharacterFormat()
#define NUM_STOP_BITS_2     2   //2 stop bit - used by CDCSetLineCoding() and CDCSetCharacterFormat()

/******************************************************************************
    Function:
        void CDCSetParity(BYTE parityType)
        
    Summary:
        This function is used manually set the parity format reported back to 
        the host during a get line coding request. (optional)

    Description:
        This macro is used manually set the parity format reported back to 
        the host during a get line coding request.

        Typical Usage:
        <code>
            CDCSetParity(PARITY_NONE);
        </code>
        
        This function is optional for CDC devices that do not actually convert
        the USB traffic to a hardware UART.

    PreCondition:
        None
        
    Parameters:
        BYTE parityType - Type of parity.  The options are the following:
            * PARITY_NONE
            * PARITY_ODD
            * PARITY_EVEN
            * PARITY_MARK
            * PARITY_SPACE
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define CDCSetParity(parityType) {line_coding.bParityType=parityType;}
#define PARITY_NONE     0 //no parity - used by CDCSetLineCoding() and CDCSetParity()
#define PARITY_ODD      1 //odd parity - used by CDCSetLineCoding() and CDCSetParity()
#define PARITY_EVEN     2 //even parity - used by CDCSetLineCoding() and CDCSetParity()
#define PARITY_MARK     3 //mark parity - used by CDCSetLineCoding() and CDCSetParity()
#define PARITY_SPACE    4 //space parity - used by CDCSetLineCoding() and CDCSetParity()

/******************************************************************************
    Function:
        void CDCSetDataSize(BYTE dataBits)
        
    Summary:
        This function is used manually set the number of data bits reported back 
        to the host during a get line coding request. (optional)

    Description:
        This function is used manually set the number of data bits reported back 
        to the host during a get line coding request.

        Typical Usage:
        <code>
            CDCSetDataSize(8);
        </code>
        
        This function is optional for CDC devices that do not actually convert
        the USB traffic to a hardware UART.

    PreCondition:
        None
        
    Parameters:
        BYTE dataBits - number of data bits.  The options are 5, 6, 7, 8, or 16.
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define CDCSetDataSize(dataBits) {line_coding.bDataBits=dataBits;}

/******************************************************************************
    Function:
        void CDCSetLineCoding(DWORD baud, BYTE format, BYTE parity, BYTE dataSize)
        
    Summary:
        This function is used to manually set the data reported back 
        to the host during a get line coding request. (optional)

    Description:
        This function is used to manually set the data reported back 
        to the host during a get line coding request.

        Typical Usage:
        <code>
            CDCSetLineCoding(19200, NUM_STOP_BITS_1, PARITY_NONE, 8);
        </code>
        
        This function is optional for CDC devices that do not actually convert
        the USB traffic to a hardware UART.

    PreCondition:
        None
        
    Parameters:
        DWORD baud - The desired baudrate
        BYTE format - number of stop bits.  Available options are:
         * NUM_STOP_BITS_1 - 1 Stop bit
         * NUM_STOP_BITS_1_5 - 1.5 Stop bits
         * NUM_STOP_BITS_2 - 2 Stop bits
        BYTE parity - Type of parity.  The options are the following:
            * PARITY_NONE
            * PARITY_ODD
            * PARITY_EVEN
            * PARITY_MARK
            * PARITY_SPACE
        BYTE dataSize - number of data bits.  The options are 5, 6, 7, 8, or 16.
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define CDCSetLineCoding(baud,format,parity,dataSize) {\
            CDCSetBaudRate(baud);\
            CDCSetCharacterFormat(format);\
            CDCSetParity(parity);\
            CDCSetDataSize(dataSize);\
        }

/******************************************************************************
    Function:
        BOOL USBUSARTIsTxTrfReady(void)
        
    Summary:
        This macro is used to check if the CDC class is ready
        to send more data.

    Description:
        This macro is used to check if the CDC class is ready
        to send more data.

        Typical Usage:
        <code>
            if(USBUSARTIsTxTrfReady())
            {
                putrsUSBUSART("Hello World");
            }
        </code>
        
    PreCondition:
        None
        
    Parameters:
        None
        
    Return Values:
        None
        
    Remarks:
        None
  
 *****************************************************************************/
#define USBUSARTIsTxTrfReady()      (cdc_trf_state == CDC_TX_READY)

/******************************************************************************
    Function:
        void mUSBUSARTTxRam(BYTE *pData, BYTE len)
    
    Description:
        Depricated in MCHPFSUSB v2.3.  This macro has been replaced by 
        USBUSARTIsTxTrfReady().
 *****************************************************************************/
#define mUSBUSARTIsTxTrfReady()     USBUSARTIsTxTrfReady()

/******************************************************************************
    Function:
        void mUSBUSARTTxRam(BYTE *pData, BYTE len)
        
    Description:
        Use this macro to transfer data located in data memory.
        Use this macro when:
            1. Data stream is not null-terminated
            2. Transfer length is known
        Remember: cdc_trf_state must == CDC_TX_READY
        Unlike putsUSBUSART, there is not code double checking
        the transfer state. Unexpected behavior will occur if
        this function is called when cdc_trf_state != CDC_TX_READY
        
    PreCondition:
        cdc_trf_state must be in the CDC_TX_READY state.
        Value of 'len' must be equal to or smaller than 255 bytes.
        
    Paramters:
        pDdata  : Pointer to the starting location of data bytes
        len     : Number of bytes to be transferred
        
    Return Values:
        None
        
    Remarks:
        This macro only handles the setup of the transfer. The
        actual transfer is handled by CDCTxService().
  
 *****************************************************************************/
#define mUSBUSARTTxRam(pData,len)   \
{                                   \
    pCDCSrc.bRam = pData;           \
    cdc_tx_len = len;               \
    cdc_mem_type = _RAM;            \
    cdc_trf_state = CDC_TX_BUSY;    \
}

/******************************************************************************
    Function:
        void mUSBUSARTTxRom(rom BYTE *pData, BYTE len)
        
    Description:
        Use this macro to transfer data located in program memory.
        Use this macro when:
            1. Data stream is not null-terminated
            2. Transfer length is known
 
        Remember: cdc_trf_state must == CDC_TX_READY
        Unlike putrsUSBUSART, there is not code double checking
        the transfer state. Unexpected behavior will occur if
        this function is called when cdc_trf_state != CDC_TX_READY
       
    PreCondition:
        cdc_trf_state must be in the CDC_TX_READY state.
        Value of 'len' must be equal to or smaller than 255 bytes.
        
    Parameters:
        pDdata  : Pointer to the starting location of data bytes
        len     : Number of bytes to be transferred
        
    Return Values:
        None
        
    Remarks:
        This macro only handles the setup of the transfer. The
        actual transfer is handled by CDCTxService().
                    
 *****************************************************************************/
#define mUSBUSARTTxRom(pData,len)   \
{                                   \
    pCDCSrc.bRom = pData;           \
    cdc_tx_len = len;               \
    cdc_mem_type = _ROM;            \
    cdc_trf_state = CDC_TX_BUSY;    \
}

/** S T R U C T U R E S ******************************************************/

/* Line Coding Structure */
#define LINE_CODING_LENGTH          0x07

typedef union _LINE_CODING
{
    struct
    {
        BYTE _byte[LINE_CODING_LENGTH];
    };
    struct
    {
        DWORD_VAL   dwDTERate;          // Complex data structure
        BYTE    bCharFormat;
        BYTE    bParityType;
        BYTE    bDataBits;
    };
} LINE_CODING;

typedef union _CONTROL_SIGNAL_BITMAP
{
    BYTE _byte;
    struct
    {
        unsigned DTE_PRESENT:1;       // [0] Not Present  [1] Present
        unsigned CARRIER_CONTROL:1;   // [0] Deactivate   [1] Activate
    };
} CONTROL_SIGNAL_BITMAP;


/* Functional Descriptor Structure - See CDC Specification 1.1 for details */

/* Header Functional Descriptor */
typedef struct __attribute__((packed)) _USB_CDC_HEADER_FN_DSC
{
    BYTE bFNLength;
    BYTE bDscType;
    BYTE bDscSubType;
    WORD bcdCDC;
} USB_CDC_HEADER_FN_DSC;

/* Abstract Control Management Functional Descriptor */
typedef struct __attribute__((packed)) _USB_CDC_ACM_FN_DSC
{
    BYTE bFNLength;
    BYTE bDscType;
    BYTE bDscSubType;
    BYTE bmCapabilities;
} USB_CDC_ACM_FN_DSC;

/* Union Functional Descriptor */
typedef struct __attribute__((packed)) _USB_CDC_UNION_FN_DSC
{
    BYTE bFNLength;
    BYTE bDscType;
    BYTE bDscSubType;
    BYTE bMasterIntf;
    BYTE bSaveIntf0;
} USB_CDC_UNION_FN_DSC;

/* Call Management Functional Descriptor */
typedef struct __attribute__((packed)) _USB_CDC_CALL_MGT_FN_DSC
{
    BYTE bFNLength;
    BYTE bDscType;
    BYTE bDscSubType;
    BYTE bmCapabilities;
    BYTE bDataInterface;
} USB_CDC_CALL_MGT_FN_DSC;

typedef union __attribute__((packed)) _CDC_NOTICE
{
    LINE_CODING GetLineCoding;
    LINE_CODING SetLineCoding;
    unsigned char packet[CDC_COMM_IN_EP_SIZE];
} CDC_NOTICE, *PCDC_NOTICE;

/** E X T E R N S ************************************************************/
extern BYTE cdc_rx_len;
extern USB_HANDLE lastTransmission;

extern BYTE cdc_trf_state;
extern POINTER pCDCSrc;
extern BYTE cdc_tx_len;
extern BYTE cdc_mem_type;

extern volatile FAR CDC_NOTICE cdc_notice;
extern LINE_CODING line_coding;

/** Public Prototypes *************************************************/
void USBCheckCDCRequest(void);
void CDCInitEP(void);
BYTE getsUSBUSART(char *buffer, BYTE len);
void putrsUSBUSART(const ROM char *data);
void putUSBUSART(char *data, BYTE Length);
void putsUSBUSART(char *data);
void CDCTxService(void);

#endif //CDC_H
