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

    USB Hardware Abstraction Layer (HAL)  (Header File)

Summary:
    This file abstracts the hardware interface.  The USB stack firmware can be
    compiled to work on different USB microcontrollers, such as PIC18 and PIC24.
    The USB related special function registers and bit names are generally very
    similar between the device families, but small differences in naming exist.

Description:
    This file abstracts the hardware interface.  The USB stack firmware can be
    compiled to work on different USB microcontrollers, such as PIC18 and PIC24.
    The USB related special function registers and bit names are generally very
    similar between the device families, but small differences in naming exist.
    
    In order to make the same set of firmware work accross the device families,
    when modifying SFR contents, a slightly abstracted name is used, which is
    then "mapped" to the appropriate real name in the usb_hal_picxx.h header.
    
    Make sure to include the correct version of the usb_hal_picxx.h file for 
    the microcontroller family which will be used.

    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 


*******************************************************************************/
//DOM-IGNORE-BEGIN
/******************************************************************************

 File Description:

 This file defines the interface to the USB hardware abstraction layer.

 Filename:        usb_hal.h
 Dependancies:    none
 Processor:       PIC18, PIC24, or PIC32 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.
 Compiler:        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 PICmicro® Microcontroller is intended and
 supplied to you, the Company’s customer, for use solely and
 exclusively on Microchip PICmicro 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:


 *************************************************************************/
#if defined(USB_SUPPORT_DEVICE) | defined(USB_SUPPORT_OTG)

#include "Compiler.h"

#define USBSetBDTAddress(addr)         U1BDTP1 = (((unsigned int)addr)/256);
#define USBPowerModule() U1PWRCbits.USBPWR = 1;
#define USBPingPongBufferReset U1CONbits.PPBRST

#define USBTransactionCompleteIE U1IEbits.TRNIE
#define USBTransactionCompleteIF U1IRbits.TRNIF
#define USBTransactionCompleteIFReg (BYTE*)&U1IR
#define USBTransactionCompleteIFBitNum 3

#define USBResetIE  U1IEbits.URSTIE
#define USBResetIF  U1IRbits.URSTIF
#define USBResetIFReg (BYTE*)&U1IR
#define USBResetIFBitNum 0

#define USBIdleIE U1IEbits.IDLEIE
#define USBIdleIF U1IRbits.IDLEIF
#define USBIdleIFReg (BYTE*)&U1IR
#define USBIdleIFBitNum 4

#define USBActivityIE U1OTGIEbits.ACTVIE
#define USBActivityIF U1OTGIRbits.ACTVIF
#define USBActivityIFReg (BYTE*)&U1OTGIR
#define USBActivityIFBitNum 4

#define USBSOFIE U1IEbits.SOFIE
#define USBSOFIF U1IRbits.SOFIF
#define USBSOFIFReg (BYTE*)&U1IR
#define USBSOFIFBitNum 2

#define USBStallIE U1IEbits.STALLIE
#define USBStallIF U1IRbits.STALLIF
#define USBStallIFReg (BYTE*)&U1IR
#define USBStallIFBitNum 7

#define USBErrorIE U1IEbits.UERRIE
#define USBErrorIF U1IRbits.UERRIF
#define USBErrorIFReg (BYTE*)&U1IR
#define USBErrorIFBitNum 1

#define USBSE0Event U1CONbits.SE0
#define USBSuspendControl U1PWRCbits.USUSPEND
#define USBPacketDisable U1CONbits.PKTDIS
#define USBResumeControl U1CONbits.RESUME

#define USBT1MSECIE U1OTGIEbits.T1MSECIE
#define USBT1MSECIF U1OTGIRbits.T1MSECIF
#define USBT1MSECIFReg (BYTE*)&U1OTGIR
#define USBT1MSECIFBitNum   6

#define USBIDIE U1OTGIEbits.IDIE
#define USBIDIF U1OTGIRbits.IDIF
#define USBIDIFReg (BYTE*)&U1OTGIR
#define USBIDIFBitNum   7

/* Buffer Descriptor Status Register Initialization Parameters */

//The _BSTALL definition is changed from 0x04 to 0x00 to
// fix a difference in the PIC18 and PIC24 definitions of this
// bit.  This should be changed back once the definitions are
// synced.
#define _BSTALL     0x04        //Buffer Stall enable
#define _DTSEN      0x08        //Data Toggle Synch enable
#define _DAT0       0x00        //DATA0 packet expected next
#define _DAT1       0x40        //DATA1 packet expected next
#define _DTSMASK    0x40        //DTS Mask
#define _USIE       0x80        //SIE owns buffer
#define _UCPU       0x00        //CPU owns buffer

#define _STAT_MASK  0xFC

// Buffer Descriptor Status Register layout.
typedef union _BD_STAT
{
    struct{
        unsigned            :2;      //Byte count
        unsigned    BSTALL  :1;     //Buffer Stall Enable
        unsigned    DTSEN   :1;     //Data Toggle Synch Enable
        unsigned            :2;     //Reserved - write as 00
        unsigned    DTS     :1;     //Data Toggle Synch Value
        unsigned    UOWN    :1;     //USB Ownership
    };
    struct{
        unsigned            :2;
        unsigned    PID0    :1;
        unsigned    PID1    :1;
        unsigned    PID2    :1;
        unsigned    PID3    :1;
    };
    struct{
        unsigned            :2;
        unsigned    PID     :4;     // Packet Identifier
    };
    BYTE            Val;
} BD_STAT;                      //Buffer Descriptor Status Register


// BDT Entry Layout
typedef union __BDT
{
    union
    {
        struct
        {
            BYTE CNT         __attribute__ ((packed));
            BD_STAT     STAT __attribute__ ((packed));
        };
        struct
        {
            WORD        count:10;   //test
            BYTE        :6;
            BYTE*       ADR; //Buffer Address
        };
    };
    DWORD           Val;
    WORD            v[2];
} BDT_ENTRY;


#define USTAT_EP0_PP_MASK   ~0x04
#define USTAT_EP_MASK       0xFC
#define USTAT_EP0_OUT       0x00
#define USTAT_EP0_OUT_EVEN  0x00
#define USTAT_EP0_OUT_ODD   0x04

#define USTAT_EP0_IN        0x08
#define USTAT_EP0_IN_EVEN   0x08
#define USTAT_EP0_IN_ODD    0x0C

typedef union
{
    WORD UEP[16];
} _UEP;

#define UEP_STALL 0x0002

typedef union _POINTER
{
    struct
    {
        BYTE bLow;
        BYTE bHigh;
        //byte bUpper;
    };
    WORD _word;                         // bLow & bHigh
    
    //pFunc _pFunc;                       // Usage: ptr.pFunc(); Init: ptr.pFunc = &<Function>;

    BYTE* bRam;                         // Ram byte pointer: 2 bytes pointer pointing
                                        // to 1 byte of data
    WORD* wRam;                         // Ram word poitner: 2 bytes poitner pointing
                                        // to 2 bytes of data

    ROM BYTE* bRom;                     // Size depends on compiler setting
    ROM WORD* wRom;
    //rom near byte* nbRom;               // Near = 2 bytes pointer
    //rom near word* nwRom;
    //rom far byte* fbRom;                // Far = 3 bytes pointer
    //rom far word* fwRom;
} POINTER;

 //******** Depricated: v2.2 - will be removed at some point of time ***
#define _LS         0x00            // Use Low-Speed USB Mode
#define _FS         0x00            // Use Full-Speed USB Mode
#define _TRINT      0x00            // Use internal transceiver
#define _TREXT      0x00            // Use external transceiver
#define _PUEN       0x00            // Use internal pull-up resistor
#define _OEMON      0x00            // Use SIE output indicator
//**********************************************************************

#define USB_PULLUP_ENABLE 0x00
//#define USB_PULLUP_DISABLE 0x00

#define USB_OTG_ENABLE                0x04
#define USB_OTG_DPLUS_ENABLE    0x80

#define USB_INTERNAL_TRANSCEIVER 0x00
#define USB_EXTERNAL_TRANSCEIVER 0x01

#define USB_FULL_SPEED 0x00
//USB_LOW_SPEED not currently supported in PIC24F USB products

#define USB_PING_PONG__NO_PING_PONG         0x00    //0b00
#define USB_PING_PONG__EP0_OUT_ONLY         0x01    //0b01
#define USB_PING_PONG__FULL_PING_PONG       0x02    //0b10
#define USB_PING_PONG__ALL_BUT_EP0          0x03    //0b11


#define ConvertToPhysicalAddress(a) a


/****************************************************************
    Function:
        void USBModuleDisable(void)
        
    Description:
        This macro is used to disable the USB module
        
    Parameters:
        None
        
    Return Values:
        None
        
    Remarks:
        None
        
  ****************************************************************/
#define USBModuleDisable() {\
    U1CON = 0;\
    U1IE = 0;\
    U1OTGIE = 0;\
    U1PWRCbits.USBPWR = 1;\
    USBDeviceState = DETACHED_STATE;\
}    

#define USBClearUSBInterrupt() IFS5bits.USB1IF = 0;
#if defined(USB_INTERRUPT)
    #define USBMaskInterrupts() {IEC5bits.USB1IE = 0;}
    #define USBUnmaskInterrupts() {IEC5bits.USB1IE = 1;}
#else
    #define USBMaskInterrupts() 
    #define USBUnmaskInterrupts() 
#endif


#if defined(USB_ENABLE_SOF_HANDLER)
    #define USB_SOF_INTERRUPT 0x04
#else
    #define USB_SOF_INTERRUPT 0x00
#endif
#if defined(USB_ENABLE_ERROR_HANDLER)
    #define USB_ERROR_INTERRUPT 0x02
#else
    #define USB_ERROR_INTERRUPT 0x02
#endif

//STALLIE, IDLEIE, TRNIE, and URSTIE are all enabled by default and are required
#define USBEnableInterrupts() {IEC5bits.USB1IE=1;}
#define ENDPOINT_MASK 0b11110000

#endif
