📄 lcd.lis
字号:
.module LCD.c
.area text(rom, con, rel)
0000 .dbfile F:\AVR练习\key_lcd\LCD.c
0000 .dbfunc e LCD_INIT _LCD_INIT fV
.even
0000 _LCD_INIT::
0000 .dbline -1
0000 .dbline 52
0000 ; // ************************************************
0000 ; // *** LCD_4BIT Driver V1.1 ***
0000 ; // *** LCD.C ***
0000 ; // ************************************************
0000 ; #define LCD_C
0000 ; #include <io8535v.h>
0000 ; #include"lcd.h"
0000 ; // ***** Define I/O pins ***** //
0000 ; #define BIT7 0x80
0000 ; #define BIT6 0x40
0000 ; #define BIT5 0x20
0000 ; #define BIT4 0x10
0000 ; #define BIT3 0x08
0000 ; #define BIT2 0x04
0000 ; #define BIT1 0x02
0000 ; #define BIT0 0x01
0000 ; // *** Set port for LCD Data Bus 8 bit mode *** //
0000 ; #define LCD_OP_PORT PORTB
0000 ; #define LCD_IP_PORT PINB
0000 ; #define LCD_DIR_PORT DDRB
0000 ; // *** Set LCD Enable Port and Bit values *** //
0000 ; //#define LCD_EN LCD_OP_PORT.2
0000 ; // *** Set LCD Register Select Port and Bit values *** //
0000 ; //#define LCD_RS LCD_OP_PORT.0
0000 ; // *** Set LCD Read/Write Port and Bit values *** //
0000 ; //#define LCD_RW LCD_OP_PORT.1
0000 ; /****************************************************************/
0000 ;
0000 ; #define LCD_EN (1 << 2) //引脚定义
0000 ; #define LCD_RS (1 << 0)
0000 ; #define LCD_RW (1 << 1)
0000 ;
0000 ; #define lcd_set_e() (LCD_OP_PORT |= LCD_EN) //置位与清零
0000 ; #define lcd_set_rs() (LCD_OP_PORT |= LCD_RS)
0000 ; #define lcd_set_rw() (LCD_OP_PORT |= LCD_RW)
0000 ; #define lcd_clear_e() (LCD_OP_PORT &= ~LCD_EN)
0000 ; #define lcd_clear_rs() (LCD_OP_PORT &= ~LCD_RS)
0000 ; #define lcd_clear_rw() (LCD_OP_PORT &= ~LCD_RW)
0000 ; /****************************************************************/
0000 ;
0000 ; #define LCD_ON 0x0C
0000 ; #define LCD_CURS_ON 0x0D
0000 ; #define LCD_OFF 0x08
0000 ; #define LCD_HOME 0x02
0000 ; #define LCD_CLEAR 0x01
0000 ; #define LCD_NEW_LINE 0xC0
0000 ; #define LCD_FUNCTION_SET 0x28
0000 ; #define LCD_MODE_SET 0x06
0000 ;
0000 ;
0000 ; void LCD_INIT(void)
0000 ; {
0000 .dbline 53
0000 ; LCD_DIR_PORT = 0xff; // LCD port output
0000 8FEF ldi R24,255
0002 87BB out 0x17,R24
0004 .dbline 54
0004 ; LCD_OP_PORT = 0x30; // Load high-data to port
0004 80E3 ldi R24,48
0006 88BB out 0x18,R24
0008 .dbline 55
0008 ; lcd_clear_rw(); // Set LCD to write
0008 C198 cbi 0x18,1
000A .dbline 56
000A ; lcd_clear_rs(); // Set LCD to command
000A C098 cbi 0x18,0
000C .dbline 57
000C ; lcd_set_e(); // Write data to LCD
000C C29A sbi 0x18,2
000E .dbline 58
000E ; asm("nop");
000E 0000 nop
0010 .dbline 59
0010 ; asm("nop");
0010 0000 nop
0012 .dbline 60
0012 ; lcd_clear_e(); // Disable LCD
0012 C298 cbi 0x18,2
0014 .dbline 61
0014 ; delay_nus(40);
0014 08E2 ldi R16,40
0016 10E0 ldi R17,0
0018 00D0 rcall _delay_nus
001A .dbline 62
001A ; lcd_clear_rw() ; // Set LCD to write
001A C198 cbi 0x18,1
001C .dbline 63
001C ; lcd_clear_rs(); // Set LCD to command
001C C098 cbi 0x18,0
001E .dbline 64
001E ; lcd_set_e(); // Write data to LCD
001E C29A sbi 0x18,2
0020 .dbline 65
0020 ; asm("nop");
0020 0000 nop
0022 .dbline 66
0022 ; asm("nop");
0022 0000 nop
0024 .dbline 67
0024 ; lcd_clear_e(); // Disable LCD
0024 C298 cbi 0x18,2
0026 .dbline 68
0026 ; delay_nus(40);
0026 08E2 ldi R16,40
0028 10E0 ldi R17,0
002A 00D0 rcall _delay_nus
002C .dbline 69
002C ; lcd_set_e(); // Write data to LCD
002C C29A sbi 0x18,2
002E .dbline 70
002E ; asm("nop");
002E 0000 nop
0030 .dbline 71
0030 ; asm("nop");
0030 0000 nop
0032 .dbline 72
0032 ; lcd_clear_e(); // Disable LCD
0032 C298 cbi 0x18,2
0034 .dbline 73
0034 ; delay_nus(40);
0034 08E2 ldi R16,40
0036 10E0 ldi R17,0
0038 00D0 rcall _delay_nus
003A .dbline 74
003A ; LCD_OP_PORT = 0x20;
003A 80E2 ldi R24,32
003C 88BB out 0x18,R24
003E .dbline 75
003E ; lcd_set_e(); // Write data to LCD
003E C29A sbi 0x18,2
0040 .dbline 76
0040 ; asm("nop");
0040 0000 nop
0042 .dbline 77
0042 ; asm("nop");
0042 0000 nop
0044 .dbline 78
0044 ; lcd_clear_e(); // Disable LCD
0044 C298 cbi 0x18,2
0046 .dbline 79
0046 ; delay_nus(40);
0046 08E2 ldi R16,40
0048 10E0 ldi R17,0
004A 00D0 rcall _delay_nus
004C .dbline -2
004C L1:
004C .dbline 0 ; func end
004C 0895 ret
004E .dbend
004E .dbfunc e LCD_Busy _LCD_Busy fV
004E ; low -> R20
004E ; high -> R22
004E ; temp -> R10
.even
004E _LCD_Busy::
004E 00D0 rcall push_gset3
0050 .dbline -1
0050 .dbline 85
0050 ; }
0050 ; //*****************************************************//
0050 ; // This routine will return the busy flag from the LCD //
0050 ; //*****************************************************//
0050 ; void LCD_Busy ( void )
0050 ; {
0050 .dbline 88
0050 ; unsigned char temp,high;
0050 ; unsigned char low;
0050 ; LCD_DIR_PORT = 0x0f; // Make I/O Port input
0050 8FE0 ldi R24,15
0052 87BB out 0x17,R24
0054 L3:
0054 .dbline 90
0054 ; do
0054 ; {
0054 .dbline 91
0054 ; temp=LCD_OP_PORT;
0054 A8B2 in R10,0x18
0056 .dbline 92
0056 ; temp=temp&BIT3;
0056 8A2D mov R24,R10
0058 8870 andi R24,8
005A A82E mov R10,R24
005C .dbline 93
005C ; LCD_OP_PORT=temp;
005C 88BB out 0x18,R24
005E .dbline 94
005E ; lcd_set_rw(); // Set LCD to READ
005E C19A sbi 0x18,1
0060 .dbline 95
0060 ; lcd_clear_rs();
0060 C098 cbi 0x18,0
0062 .dbline 96
0062 ; lcd_set_e();
0062 C29A sbi 0x18,2
0064 .dbline 97
0064 ; delay_nus(3);
0064 03E0 ldi R16,3
0066 10E0 ldi R17,0
0068 00D0 rcall _delay_nus
006A .dbline 98
006A ; high = LCD_IP_PORT; // read the high nibble.
006A 66B3 in R22,0x16
006C .dbline 99
006C ; lcd_clear_e(); // Disable LCD
006C C298 cbi 0x18,2
006E .dbline 100
006E ; lcd_set_e();
006E C29A sbi 0x18,2
0070 .dbline 101
0070 ; asm("nop");
0070 0000 nop
0072 .dbline 102
0072 ; asm("nop");
0072 0000 nop
0074 .dbline 103
0074 ; low = LCD_IP_PORT; // read the low nibble.
0074 46B3 in R20,0x16
0076 .dbline 104
0076 ; lcd_clear_e(); // Disable LCD
0076 C298 cbi 0x18,2
0078 .dbline 105
0078 L4:
0078 .dbline 105
0078 ; } while(high & 0x80);
0078 67FD sbrc R22,7
007A ECCF rjmp L3
007C .dbline 106
007C ; delay_nus(20);
007C 04E1 ldi R16,20
007E 10E0 ldi R17,0
0080 00D0 rcall _delay_nus
0082 .dbline -2
0082 L2:
0082 00D0 rcall pop_gset3
0084 .dbline 0 ; func end
0084 0895 ret
0086 .dbsym r low 20 c
0086 .dbsym r high 22 c
0086 .dbsym r temp 10 c
0086 .dbend
0086 .dbfunc e LCD_WriteControl _LCD_WriteControl fV
0086 ; temp -> R20
0086 ; CMD -> R22
.even
0086 _LCD_WriteControl::
0086 00D0 rcall push_gset2
0088 602F mov R22,R16
008A .dbline -1
008A .dbline 112
008A ; }
008A ; // ********************************************** //
008A ; // *** Write a control instruction to the LCD *** //
008A ; // ********************************************** //
008A ; void LCD_WriteControl (unsigned char CMD)
008A ; {
008A .dbline 114
008A ; char temp;
008A ; LCD_Busy(); // Test if LCD busy
008A E1DF rcall _LCD_Busy
008C .dbline 115
008C ; LCD_DIR_PORT = 0xff; // LCD port output
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