; ***********************************************************************
; *									*
; * Header File for ELEC2041 Experiment 5, Second Version --- Internal  *
; *									*
; ***********************************************************************

; Author:   John Zaitseff <J.Zaitseff@unsw.edu.au>
; Date:     28th May, 2003
; Version:  1.2

; This header file contains private (internal) definitions needed for the
; second version of the Flash program, as used in ELEC2041 Experiment 5.
; In other words, it contains just those definitions that the boot code
; and software interrupt handler need to know about; the person writing
; the user mode program does NOT need to even see the contents of this
; file!  This header file is used by the files boot-swi-v2.s and swi-v2.s.


; -----------------------------------------------------------------------
; ARM Processor definitions

; The following lines define some of the bits in the Current Processor
; Status Register and the various Saved Processor Status Registers.

	.set	ARM_PSR_i, 0b10000000	    ; I bit in CPSR/SPSR
	.set	ARM_PSR_f, 0b01000000	    ; F bit in CPSR/SPSR
	.set	ARM_PSR_t, 0b00100000	    ; T bit in CPSR/SPSR

; The bottom five bits of the CPSR/SPSR define the processor mode; the
; following lines define the values that can appear in these five bits.
; The ARM_PSR_mode_mask is used to "mask off" these bits, and is used when
; reading and/or writing to the CPSR/SPSRs.

	.set	ARM_PSR_mode_mask, 0b11111  ; Processor modes mask
	.set	ARM_PSR_mode_usr,  0b10000  ; User mode
	.set	ARM_PSR_mode_fiq,  0b10001  ; Fast Interrupt mode
	.set	ARM_PSR_mode_irq,  0b10010  ; Interrupt mode
	.set	ARM_PSR_mode_svc,  0b10011  ; Supervisor mode
	.set	ARM_PSR_mode_abt,  0b10111  ; Abort mode
	.set	ARM_PSR_mode_und,  0b11011  ; Undefined mode
	.set	ARM_PSR_mode_sys,  0b11111  ; System mode


; -----------------------------------------------------------------------
; DSLMU Microcontroller Board-specific definitions

; The following lines contain definitions specific to the Komodo ARM
; environment running on the DSLMU Microcontroller Board.  Please note
; that this header file defines each of the ports as absolute addresses;
; that is, each port definition is the actual address of that port.  Not
; every port available on the DSLMU Microcontroller Board is defined here.

	.set	portA,       0x10000000	    ; Microcontroller Port A address
	.set	portB,       0x10000004	    ; Microcontroller Port B address

	.set	portB_pbs2,  0b10000000	    ; Bit 7 = Push-button switch S2
	.set	portB_pbs3,  0b01000000	    ; Bit 6 = Push-button switch S3
	.set	portB_lcdbl, 0b00100000	    ; Bit 5 = LCD backlight
	.set	portB_leden, 0b00010000	    ; Bit 4 = LEDs Enable
	.set	portB_LC_RW, 0b00000100	    ; Bit 2 = Port A direction, LC_RW
	.set	portB_LC_RS, 0b00000010	    ; Bit 1 = LC_RS signal
	.set	portB_LC_EN, 0b00000001	    ; Bit 0 = LC_EN signal


; Please see the file header-v1.s for the reason why the ".end" assembler
; directive must never appear in header files.