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

// File             : N2H_registers_and_macros.h

// Author           : Tero Arpinen

// Date             : 22.12.2004

// Decription       : This file contains customizable register address 

//                    definitions

//                    for N2H interface and some needed macros

// 

// Version history  : 22.12.2004    tar    Original version 

//                  : 06.07.2005    tar    Modified to work with N2H2

//                  : 02.10.2009    tko    Removed unneeded macros

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

#ifndef N2H_REGISTERS_AND_MACROS_H

#define N2H_REGISTERS_AND_MACROS_H

// DEFINE FOLLOWING REGISTERS ACCORDING TO NIOS OR NIOS II HARDWARE 

// CONFIGURATION

// N2H2 Avalon slave base address

#define N2H_REGISTERS_BASE_ADDRESS            ((void*) N2H2_CHAN_2_BASE)

// Buffer start address in cpu's memory

#define N2H_REGISTERS_BUFFER_START            (SHARED_MEM_2_BASE)

// Writeable registers

// set bit 31 to 1 so that writes and reads bypass cache

#define N2H_REGISTERS_TX_BUFFER_START         (0x80000000 | SHARED_MEM_2_BASE)

#define N2H_REGISTERS_TX_BUFFER_BYTE_LENGTH (0x00000400)

#define N2H_REGISTERS_TX_BUFFER_END (N2H_REGISTERS_TX_BUFFER_START + \

                                     N2H_REGISTERS_TX_BUFFER_BYTE_LENGTH - 1)

// Readable registers

#define N2H_REGISTERS_RX_BUFFER_START       (N2H_REGISTERS_TX_BUFFER_START + N2H_REGISTERS_TX_BUFFER_BYTE_LENGTH)

#define N2H_REGISTERS_RX_BUFFER_BYTE_LENGTH (0x00000C00)

#define N2H_REGISTERS_RX_BUFFER_END         (N2H_REGISTERS_RX_BUFFER_START + \

                                           N2H_REGISTERS_RX_BUFFER_BYTE_LENGTH \

                                           - 1)

// N2H Interrupt registers, numbers and priorities

#define N2H_RX_IRQ                      (2)

#define N2H_RX_IRQ_PRI                  (3)

// N2H Channels

#define N2H_NUMBER_OF_CHANNELS              (8)

#endif // N2H_REGISTERS_AND_MACROS_H