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Subversion Repositories mcip_open

[/] [mcip_open/] [trunk/] [Hi_MCIPopen.ASM] - Blame information for 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        ;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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[/] [mcip_open/] [trunk/] [Hi_MCIPopen.ASM] - Blame information for rev 3

Line No.	Rev	Author	Line
1	2	mezzah	`;******************************************************************************`
2			`; *`
3			`; Filename: Hi_MCIPopen.asm *`
4			`; Description: ASM program for MCIPopen implementation example *`
5			`; Date: 07/25/2015 *`
6			`; File Version: 1 *`
7			`; Tool: MPLAB IDE v8.83 *`
8			`; *`
9			`; Author: Ibrahim MEZZAH *`
10			`; Company: Ferhat Abbas University - Algeria *`
11			`; *`
12			`;******************************************************************************`
13			`; *`
14			`; Files Required: P18F4410.INC *`
15			`; *`
16			`;******************************************************************************`
17
18			`LIST P=18F4410 ;directive to define processor`
19			`#include ;processor specific variable definitions`
20
21
22
23			`; Oscillator Selection:`
24			`CONFIG OSC = LP ;LP`
25
26
27
28			`; LCD defines /////////////////////////////////////////`
29			`#define LCD_DATA_PRT 0xF8B ;/PRTC/`
30			`#define LCD_DATA_PORT 0x8B`
31			`#define LCD_TRIS_DATA_PORT 0x94`
32			`#define LCD_INST_PORT 0x8C ;/PRTD/`
33			`#define LCD_TRIS_INST_PORT 0x95`
34
35			`#define RW_PIN 5 ;/* PORT for RW */`
36			`#define RS_PIN 6 ;/* PORT for RS */`
37			`#define E_PIN 7 ;/* PORT for E */`
38
39			`#define FOUR_BIT 0x28 ;0b00101000`
40			`#define CLEAR 0x01 ;0b00000001`
41			`#define CURSOR_HOME 0x02 ;0b00000010`
42			`#define MODE_SET 0x06 ;0b00000110`
43			`#define DISPLAY_ON_C 0x0e ;0b00001110`
44			`#define DISPLAY_ON_B 0x0f ;0b00001111`
45			`#define DISPLAY_ON 0x0c ;0b00001100`
46			`#define DISPLAY_OFF 0x08 ;0b00001000`
47			`#define SHIFT_D_R 0x1c ;0b00011100`
48			`#define SHIFT_D_L 0x18 ;0b00011000`
49			`#define SHIFT_C_R 0x14 ;0b00010100`
50			`#define SHIFT_C_L 0x10 ;0b00010000`
51
52			`#define access 0`
53
54			`CBLOCK 0x080`
55			`WREG_TEMP1 ;variable used for context saving`
56			`STATUS_TEMP1 ;variable used for context saving`
57			`BSR_TEMP1 ;variable used for context saving`
58
59			`WREG_TEMP2 ;variable used for context saving`
60			`STATUS_TEMP2 ;variable used for context saving`
61			`BSR_TEMP2 ;variable used for context saving`
62
63			`WREG_TEMP3 ;variable used for context saving`
64			`STATUS_TEMP3 ;variable used for context saving`
65			`BSR_TEMP3 ;variable used for context saving`
66
67			`WREG_TEMP4 ;variable used for context saving`
68			`STATUS_TEMP4 ;variable used for context saving`
69			`BSR_TEMP4 ;variable used for context saving`
70			`ENDC`
71
72			`CBLOCK 0x009 ;variables in access RAM`
73			`e1`
74			`e2`
75			`e3`
76			`e4`
77			`LCD_command`
78			`LCD_data`
79			`ENDC`
80
81
82			`;******************************************************************************`
83			`;Reset vector`
84			`; This code will start executing when a reset occurs.`
85
86			`ORG 0x0000`
87
88			`goto Main ;go to start of main code`
89
90
91
92			`Main:`
93
94			`;------------------------------------------------------------------------------`
95			`; I/O ports configuration`
96			`;------------------------------------------------------------------------------`
97
98			`MOVLW 0x0f`
99			`MOVWF LCD_TRIS_DATA_PORT,0`
100			`CLRF LCD_INST_PORT,0`
101			`MOVLW 0x1f`
102			`MOVWF LCD_TRIS_INST_PORT,0`
103
104			`MOVLW 0x0f`
105			`CLRF LATA`
106			`MOVWF TRISA`
107			`CLRF TRISB`
108			`;------------------------------------------------------------------------------`
109			`; LCD Initialisation`
110			`;------------------------------------------------------------------------------`
111
112
113			`MOVLW 0x30`
114			`MOVWF LCD_DATA_PORT,0`
115			`BSF LCD_INST_PORT,E_PIN,0`
116			`NOP`
117			`NOP`
118			`BCF LCD_INST_PORT,E_PIN,0`
119
120			`CALL Delay1_6ms`
121			`CALL Delay1_6ms`
122
123			`BSF LCD_INST_PORT,E_PIN,0`
124			`NOP`
125			`NOP`
126			`BCF LCD_INST_PORT,E_PIN,0`
127
128			`CALL Delay42us`
129			`CALL Delay42us`
130
131			`BSF LCD_INST_PORT,E_PIN,0`
132			`NOP`
133			`NOP`
134			`BCF LCD_INST_PORT,E_PIN,0`
135
136			`CALL Delay42us`
137			`CALL Delay42us`
138
139			`MOVLW 0x20`
140			`MOVWF LCD_DATA_PORT,0`
141			`BSF LCD_INST_PORT,E_PIN,0`
142			`NOP`
143			`NOP`
144			`BCF LCD_INST_PORT,E_PIN,0`
145
146			`CALL Delay42us`
147			`CALL Delay42us`
148
149			`MOVLW FOUR_BIT`
150			`MOVWF LCD_command,access`
151			`CALL Command`
152
153			`CALL Delay42us`
154			`CALL Delay42us`
155
156			`MOVLW DISPLAY_OFF`
157			`MOVWF LCD_command,access`
158			`CALL Command`
159
160			`CALL Delay42us`
161			`CALL Delay42us`
162
163			`MOVLW DISPLAY_ON`
164			`MOVWF LCD_command,access`
165			`CALL Command`
166
167			`CALL Delay42us`
168			`CALL Delay42us`
169
170			`MOVLW MODE_SET`
171			`MOVWF LCD_command,access`
172			`CALL Command`
173
174			`CALL Delay42us`
175			`CALL Delay42us`
176
177			`MOVLW CLEAR`
178			`MOVWF LCD_command,access`
179			`CALL Command`
180
181			`CALL Delay1_6ms`
182			`CALL Delay1_6ms`
183
184			`;------------------------------------------------------------------------------`
185			`; END LCD Initialisation`
186			`;------------------------------------------------------------------------------`
187
188			`; Displaying "Hello MCIP!"`
189			`MOVLW 0x03`
190			`MOVWF LCD_data,access`
191			`CALL Set_address`
192			`CALL Delay42us`
193
194			`MOVLW 'H'`
195			`MOVWF LCD_data,access`
196			`CALL Display`
197			`CALL Delay42us`
198
199			`MOVLW 'e'`
200			`MOVWF LCD_data,access`
201			`CALL Display`
202			`CALL Delay42us`
203
204			`MOVLW 'l'`
205			`MOVWF LCD_data,access`
206			`CALL Display`
207			`CALL Delay42us`
208
209			`MOVLW 'l'`
210			`MOVWF LCD_data,access`
211			`CALL Display`
212			`CALL Delay42us`
213
214			`MOVLW 'o'`
215			`MOVWF LCD_data,access`
216			`CALL Display`
217			`CALL Delay42us`
218
219			`MOVLW ' '`
220			`MOVWF LCD_data,access`
221			`CALL Display`
222			`CALL Delay42us`
223
224			`MOVLW 'M'`
225			`MOVWF LCD_data,access`
226			`CALL Display`
227			`CALL Delay42us`
228
229			`MOVLW 'C'`
230			`MOVWF LCD_data,access`
231			`CALL Display`
232			`CALL Delay42us`
233
234			`MOVLW 'I'`
235			`MOVWF LCD_data,access`
236			`CALL Display`
237			`CALL Delay42us`
238
239			`MOVLW 'P'`
240			`MOVWF LCD_data,access`
241			`CALL Display`
242			`CALL Delay42us`
243
244			`MOVLW '!'`
245			`MOVWF LCD_data,access`
246			`CALL Display`
247			`CALL Delay42us`
248
249
250			`;--------------------`
251			`MOVLW 0x53`
252			`MOVWF LCD_data,access`
253			`CALL Set_address`
254			`CALL Delay42us`
255
256			`MOVLW '<'`
257			`MOVWF LCD_data,access`
258			`CALL Display`
259			`CALL Delay42us`
260
261			`MOVLW '<'`
262			`MOVWF LCD_data,access`
263			`CALL Display`
264			`CALL Delay42us`
265
266			`MOVLW 0x63`
267			`MOVWF LCD_data,access`
268			`CALL Set_address`
269			`CALL Delay42us`
270
271			`MOVLW '<'`
272			`MOVWF LCD_data,access`
273			`CALL Display`
274			`CALL Delay42us`
275
276			`MOVLW '<'`
277			`MOVWF LCD_data,access`
278			`CALL Display`
279			`CALL Delay42us`
280
281
282			`;----------------------`
283			`; ~ 2second delay`
284			`MOVLW 0x22`
285			`MOVWF e4,access`
286
287			`loop21:`
288			`CALL Delay58ms`
289			`DECFSZ e4,1,access`
290			`BRA loop21`
291
292			`MOVLW 0x80`
293			`MOVWF LATB`
294
295			`looplooop:`
296			`RLNCF LATB,1,0`
297
298			`MOVLW SHIFT_D_L`
299			`MOVWF LCD_command,access`
300			`CALL Command`
301
302			`MOVLW 0x0f`
303			`ANDWF PORTA,0,0`
304
305			`MOVWF e4,0`
306
307			`INCF e4,1,0`
308
309			`loop_3x58ms:`
310			`CALL Delay58ms`
311			`;CALL Delay58ms`
312
313			`DECF e4,1,0`
314			`TSTFSZ e4,0`
315			`BRA loop_3x58ms`
316			`BRA looplooop`
317
318
319			`; Fuctions:`
320
321			`;---------------------------------`
322			`; Delay 42us *********************`
323			`Delay42us:`
324
325			`;save working registers`
326			`movff STATUS,STATUS_TEMP1`
327			`movff WREG,WREG_TEMP1`
328			`movff BSR,BSR_TEMP1`
329
330			`MOVLW 0xAC`
331			`MOVWF e1,access`
332
333			`loop10:`
334			`INCFSZ e1,1,access`
335			`BRA loop10`
336
337			`;restore working registers`
338			`movff BSR_TEMP1,BSR`
339			`movff WREG_TEMP1,WREG`
340			`movff STATUS_TEMP1,STATUS`
341
342			`RETURN`
343			`;****** end Delay 40us ********`
344			`;----------------------------------`
345
346
347			`;---------------------------------`
348			`; Delay 1.6ms ********************`
349			`Delay1_6ms:`
350
351			`;save working registers`
352			`movff STATUS,STATUS_TEMP2`
353			`movff WREG,WREG_TEMP2`
354			`movff BSR,BSR_TEMP2`
355
356			`MOVLW 0x25`
357			`MOVWF e2,access`
358
359			`loop3:`
360			`CALL Delay42us`
361			`DECFSZ e2,1,access`
362			`BRA loop3`
363
364			`;restore working registers`
365			`movff BSR_TEMP2,BSR`
366			`movff WREG_TEMP2,WREG`
367			`movff STATUS_TEMP2,STATUS`
368
369			`RETURN`
370			`;****** end Delay1.6ms ********`
371			`;----------------------------------`
372
373
374			`;---------------------------------`
375			`; Delay 58ms *********************`
376			`Delay58ms:`
377
378			`;save working registers`
379			`movff STATUS,STATUS_TEMP3`
380			`movff WREG,WREG_TEMP3`
381			`movff BSR,BSR_TEMP3`
382
383			`MOVLW 0x24`
384			`MOVWF e3,access`
385
386			`loop4:`
387			`CALL Delay1_6ms`
388			`DECFSZ e3,1,access`
389			`BRA loop4`
390
391			`;restore working registers`
392			`movff BSR_TEMP3,BSR`
393			`movff WREG_TEMP3,WREG`
394			`movff STATUS_TEMP3,STATUS`
395
396			`RETURN`
397			`;****** end Delay 58ms ********`
398			`;----------------------------------`
399
400
401			`;----------------------------------`
402			`; send a command to the LCD *******`
403			`Command:`
404
405			`;save working registers`
406			`movff STATUS,STATUS_TEMP4`
407			`movff WREG,WREG_TEMP4`
408			`movff BSR,BSR_TEMP4`
409
410			`MOVFF LCD_command,LCD_DATA_PRT`
411			`BSF LCD_INST_PORT,E_PIN,0`
412			`NOP`
413			`NOP`
414			`NOP`
415			`BCF LCD_INST_PORT,E_PIN,0`
416			`SWAPF LCD_DATA_PORT,1,0`
417			`NOP`
418			`NOP`
419			`NOP`
420			`NOP`
421			`NOP`
422			`NOP`
423			`NOP`
424			`NOP`
425			`NOP`
426			`NOP`
427			`NOP`
428			`BSF LCD_INST_PORT,E_PIN,0`
429			`NOP`
430			`NOP`
431			`NOP`
432			`BCF LCD_INST_PORT,E_PIN,0`
433
434			`;restore working registers`
435			`movff BSR_TEMP4,BSR`
436			`movff WREG_TEMP4,WREG`
437			`movff STATUS_TEMP4,STATUS`
438
439			`RETURN`
440			`;**** end send command ********`
441			`;----------------------------------`
442
443
444			`;----------------------------------`
445			`; send data to the LCD ************`
446			`Display:`
447
448			`;save working registers`
449			`movff STATUS,STATUS_TEMP4`
450			`movff WREG,WREG_TEMP4`
451			`movff BSR,BSR_TEMP4`
452
453			`MOVFF LCD_data,LCD_DATA_PRT`
454			`BSF LCD_INST_PORT,RS_PIN,0`
455			`BSF LCD_INST_PORT,E_PIN,0`
456			`NOP`
457			`NOP`
458			`NOP`
459			`BCF LCD_INST_PORT,E_PIN,0`
460			`SWAPF LCD_DATA_PORT,1,0`
461			`NOP`
462			`NOP`
463			`NOP`
464			`NOP`
465			`NOP`
466			`NOP`
467			`NOP`
468			`NOP`
469			`NOP`
470			`NOP`
471			`NOP`
472			`BSF LCD_INST_PORT,E_PIN,0`
473			`NOP`
474			`NOP`
475			`NOP`
476			`BCF LCD_INST_PORT,E_PIN,0`
477			`BCF LCD_INST_PORT,RS_PIN,0`
478
479			`;restore working registers`
480			`movff BSR_TEMP4,BSR`
481			`movff WREG_TEMP4,WREG`
482			`movff STATUS_TEMP4,STATUS`
483
484			`RETURN`
485			`;****** end send data *********`
486			`;----------------------------------`
487
488			`;----------------------------------`
489			`; Set an address to the LCD *******`
490			`Set_address:`
491
492			`;save working registers`
493			`movff STATUS,STATUS_TEMP4`
494			`movff WREG,WREG_TEMP4`
495			`movff BSR,BSR_TEMP4`
496
497			`MOVLW 0x80`
498			`IORWF LCD_data,1,access`
499
500			`MOVFF LCD_data,LCD_DATA_PRT`
501			`BSF LCD_INST_PORT,E_PIN,0`
502			`NOP`
503			`NOP`
504			`NOP`
505			`BCF LCD_INST_PORT,E_PIN,0`
506			`SWAPF LCD_DATA_PORT,1,0`
507			`NOP`
508			`NOP`
509			`NOP`
510			`NOP`
511			`NOP`
512			`NOP`
513			`NOP`
514			`NOP`
515			`NOP`
516			`NOP`
517			`NOP`
518			`BSF LCD_INST_PORT,E_PIN,0`
519			`NOP`
520			`NOP`
521			`NOP`
522			`BCF LCD_INST_PORT,E_PIN,0`
523
524			`;restore working registers`
525			`movff BSR_TEMP4,BSR`
526			`movff WREG_TEMP4,WREG`
527			`movff STATUS_TEMP4,STATUS`
528
529			`RETURN`
530			`;****** end set address *******`
531			`;----------------------------------`
532
533
534			`;******************************************************************************`
535			`;End of program`
536
537			`END`