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[/] [mcip_open/] [trunk/] [Hi_MCIPopen.ASM] - Rev 3

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;******************************************************************************
;                                                                             *
;    Filename:       Hi_MCIPopen.asm                                          *
;    Description:    ASM program for MCIPopen implementation example          *
;    Date:           07/25/2015                                               *
;    File Version:   1                                                        *
;    Tool:           MPLAB IDE v8.83                                          *
;                                                                             *
;    Author:         Ibrahim MEZZAH                                           *
;    Company:        Ferhat Abbas University - Algeria                        *
;                                                                             * 
;******************************************************************************
;                                                                             *
;    Files Required: P18F4410.INC                                             *
;                                                                             *
;******************************************************************************

        LIST P=18F4410  ;directive to define processor
        #include <P18F4410.INC> ;processor specific variable definitions



;   Oscillator Selection:
    CONFIG      OSC = LP             ;LP



; LCD defines /////////////////////////////////////////
#define LCD_DATA_PRT       0xF8B ;/*PRTC*/
#define LCD_DATA_PORT      0x8B
#define LCD_TRIS_DATA_PORT 0x94
#define LCD_INST_PORT      0x8C ;/*PRTD*/
#define LCD_TRIS_INST_PORT 0x95

#define RW_PIN   5   ;/* PORT for RW */ 
#define RS_PIN   6   ;/* PORT for RS */ 
#define E_PIN    7   ;/* PORT for E  */ 

#define FOUR_BIT                        0x28    ;0b00101000
#define CLEAR                           0x01    ;0b00000001
#define CURSOR_HOME                     0x02    ;0b00000010
#define MODE_SET                        0x06    ;0b00000110
#define DISPLAY_ON_C            0x0e    ;0b00001110
#define DISPLAY_ON_B            0x0f    ;0b00001111
#define DISPLAY_ON                      0x0c    ;0b00001100
#define DISPLAY_OFF                     0x08    ;0b00001000
#define SHIFT_D_R                       0x1c    ;0b00011100
#define SHIFT_D_L                       0x18    ;0b00011000
#define SHIFT_C_R                       0x14    ;0b00010100
#define SHIFT_C_L                       0x10    ;0b00010000

#define access    0

                CBLOCK  0x080
                WREG_TEMP1      ;variable used for context saving 
                STATUS_TEMP1 ;variable used for context saving
                BSR_TEMP1       ;variable used for context saving

                WREG_TEMP2      ;variable used for context saving 
                STATUS_TEMP2 ;variable used for context saving
                BSR_TEMP2       ;variable used for context saving

                WREG_TEMP3      ;variable used for context saving 
                STATUS_TEMP3 ;variable used for context saving
                BSR_TEMP3       ;variable used for context saving

                WREG_TEMP4      ;variable used for context saving 
                STATUS_TEMP4 ;variable used for context saving
                BSR_TEMP4       ;variable used for context saving
                ENDC

                CBLOCK  0x009 ;variables in access RAM
                e1
                e2
                e3
                e4
                LCD_command
                LCD_data
                ENDC


;******************************************************************************
;Reset vector
; This code will start executing when a reset occurs.

                ORG     0x0000

                goto    Main            ;go to start of main code



Main:

    ;------------------------------------------------------------------------------
    ;  I/O ports configuration
    ;------------------------------------------------------------------------------

        MOVLW 0x0f
        MOVWF LCD_TRIS_DATA_PORT,0
        CLRF LCD_INST_PORT,0
        MOVLW 0x1f
        MOVWF LCD_TRIS_INST_PORT,0

        MOVLW 0x0f
        CLRF LATA
        MOVWF TRISA
        CLRF TRISB
    ;------------------------------------------------------------------------------
    ;  LCD Initialisation
    ;------------------------------------------------------------------------------


        MOVLW 0x30
        MOVWF LCD_DATA_PORT,0
        BSF LCD_INST_PORT,E_PIN,0
        NOP
        NOP
        BCF LCD_INST_PORT,E_PIN,0

        CALL    Delay1_6ms
        CALL    Delay1_6ms

        BSF LCD_INST_PORT,E_PIN,0
        NOP
        NOP
        BCF LCD_INST_PORT,E_PIN,0

        CALL    Delay42us
        CALL    Delay42us

        BSF LCD_INST_PORT,E_PIN,0
        NOP
        NOP
        BCF LCD_INST_PORT,E_PIN,0

        CALL    Delay42us
        CALL    Delay42us

        MOVLW 0x20
        MOVWF LCD_DATA_PORT,0
        BSF LCD_INST_PORT,E_PIN,0
        NOP
        NOP
        BCF LCD_INST_PORT,E_PIN,0

        CALL    Delay42us
        CALL    Delay42us

        MOVLW   FOUR_BIT
        MOVWF   LCD_command,access
        CALL    Command

        CALL    Delay42us
        CALL    Delay42us

        MOVLW   DISPLAY_OFF
        MOVWF   LCD_command,access
        CALL    Command

        CALL    Delay42us
        CALL    Delay42us

        MOVLW   DISPLAY_ON
        MOVWF   LCD_command,access
        CALL    Command

        CALL    Delay42us
        CALL    Delay42us

        MOVLW   MODE_SET
        MOVWF   LCD_command,access
        CALL    Command

        CALL    Delay42us
        CALL    Delay42us

        MOVLW   CLEAR
        MOVWF   LCD_command,access
        CALL    Command

        CALL    Delay1_6ms
        CALL    Delay1_6ms

    ;------------------------------------------------------------------------------
    ;  END LCD Initialisation
    ;------------------------------------------------------------------------------

        ; Displaying "Hello MCIP!"
        MOVLW   0x03
        MOVWF   LCD_data,access
        CALL    Set_address
        CALL    Delay42us

        MOVLW   'H'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'e'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'l'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'l'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'o'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   ' '
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'M'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'C'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'I'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   'P'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   '!'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us


        ;--------------------
        MOVLW   0x53
        MOVWF   LCD_data,access
        CALL    Set_address
        CALL    Delay42us

        MOVLW   '<'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   '<'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   0x63
        MOVWF   LCD_data,access
        CALL    Set_address
        CALL    Delay42us

        MOVLW   '<'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us

        MOVLW   '<'
        MOVWF   LCD_data,access
        CALL    Display
        CALL    Delay42us


        ;----------------------
        ; ~ 2second delay
        MOVLW   0x22
        MOVWF   e4,access

loop21:
        CALL    Delay58ms
        DECFSZ  e4,1,access
        BRA loop21

        MOVLW   0x80
        MOVWF   LATB

looplooop:
        RLNCF   LATB,1,0

        MOVLW   SHIFT_D_L
        MOVWF   LCD_command,access
        CALL    Command

        MOVLW   0x0f
        ANDWF   PORTA,0,0
        
        MOVWF   e4,0

        INCF    e4,1,0

loop_3x58ms:
        CALL    Delay58ms
        ;CALL   Delay58ms

        DECF    e4,1,0
        TSTFSZ  e4,0
        BRA             loop_3x58ms
        BRA             looplooop


; Fuctions:

;---------------------------------
; Delay 42us *********************
Delay42us:

        ;save working registers
        movff   STATUS,STATUS_TEMP1
        movff   WREG,WREG_TEMP1
        movff   BSR,BSR_TEMP1

        MOVLW   0xAC
        MOVWF   e1,access

loop10:
        INCFSZ  e1,1,access
        BRA loop10

        ;restore working registers
        movff   BSR_TEMP1,BSR
        movff   WREG_TEMP1,WREG
        movff   STATUS_TEMP1,STATUS

        RETURN
;******** end Delay 40us **********
;----------------------------------


;---------------------------------
; Delay 1.6ms ********************
Delay1_6ms:

        ;save working registers
        movff   STATUS,STATUS_TEMP2
        movff   WREG,WREG_TEMP2
        movff   BSR,BSR_TEMP2

        MOVLW   0x25
        MOVWF   e2,access

loop3:
        CALL    Delay42us
        DECFSZ  e2,1,access
        BRA loop3

        ;restore working registers
        movff   BSR_TEMP2,BSR
        movff   WREG_TEMP2,WREG
        movff   STATUS_TEMP2,STATUS

        RETURN
;******** end Delay1.6ms **********
;----------------------------------


;---------------------------------
; Delay 58ms *********************
Delay58ms:

        ;save working registers
        movff   STATUS,STATUS_TEMP3
        movff   WREG,WREG_TEMP3
        movff   BSR,BSR_TEMP3

        MOVLW   0x24
        MOVWF   e3,access

loop4:
        CALL    Delay1_6ms
        DECFSZ  e3,1,access
        BRA loop4

        ;restore working registers
        movff   BSR_TEMP3,BSR
        movff   WREG_TEMP3,WREG
        movff   STATUS_TEMP3,STATUS

        RETURN
;******** end Delay 58ms **********
;----------------------------------


;----------------------------------
; send a command to the LCD *******
Command:

        ;save working registers
        movff   STATUS,STATUS_TEMP4
        movff   WREG,WREG_TEMP4
        movff   BSR,BSR_TEMP4

MOVFF LCD_command,LCD_DATA_PRT
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0
SWAPF LCD_DATA_PORT,1,0
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0

        ;restore working registers
        movff   BSR_TEMP4,BSR
        movff   WREG_TEMP4,WREG
        movff   STATUS_TEMP4,STATUS

RETURN
;****** end send command **********
;----------------------------------


;----------------------------------
; send data to the LCD ************
Display:

        ;save working registers
        movff   STATUS,STATUS_TEMP4
        movff   WREG,WREG_TEMP4
        movff   BSR,BSR_TEMP4

MOVFF LCD_data,LCD_DATA_PRT
BSF LCD_INST_PORT,RS_PIN,0
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0
SWAPF LCD_DATA_PORT,1,0
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0
BCF LCD_INST_PORT,RS_PIN,0

        ;restore working registers
        movff   BSR_TEMP4,BSR
        movff   WREG_TEMP4,WREG
        movff   STATUS_TEMP4,STATUS

RETURN
;******** end send data ***********
;----------------------------------

;----------------------------------
; Set an address to the LCD *******
Set_address:

        ;save working registers
        movff   STATUS,STATUS_TEMP4
        movff   WREG,WREG_TEMP4
        movff   BSR,BSR_TEMP4

MOVLW   0x80
IORWF   LCD_data,1,access

MOVFF LCD_data,LCD_DATA_PRT
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0
SWAPF LCD_DATA_PORT,1,0
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
BSF LCD_INST_PORT,E_PIN,0
NOP
NOP
NOP
BCF LCD_INST_PORT,E_PIN,0

        ;restore working registers
        movff   BSR_TEMP4,BSR
        movff   WREG_TEMP4,WREG
        movff   STATUS_TEMP4,STATUS

RETURN
;******** end set address *********
;----------------------------------


;******************************************************************************
;End of program

                END

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