📄 12864.s
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.module _12864.c
.area text(rom, con, rel)
.dbfile D:\M16开发板实验教程\icc-avr\12864\12864.c
.dbfunc e LCD_init _LCD_init fV
.even
_LCD_init::
.dbline -1
.dbline 19
; #include "iom16v.h"
; #include "macros.h"
; #include "12864.h"
;
;
;
;
; /**********************************************************
; RT12864M LCD DISPLAY
; 建立时间：2005年2月1号
; 修改日期：2005年2月1号
;
; **********************************************************/
; extern void delay_nus(unsigned int n);
; extern void delay_nms(unsigned int n);
;
;
; void LCD_init(void)
; {
.dbline 20
; LCD_EN_PORT &= ~LCD_EN; //EN=0
cbi 0x18,1
.dbline 21
; delay_nms(1);
ldi R16,1
ldi R17,0
xcall _delay_nms
.dbline 22
; LCD_write_char(0x34,0);
clr R18
clr R19
ldi R16,52
ldi R17,0
xcall _LCD_write_char
.dbline 23
; delay_nms(8);
ldi R16,8
ldi R17,0
xcall _delay_nms
.dbline 24
; LCD_write_char(0x30,0);
clr R18
clr R19
ldi R16,48
ldi R17,0
xcall _LCD_write_char
.dbline 25
; delay_nms(8);
ldi R16,8
ldi R17,0
xcall _delay_nms
.dbline 26
; LCD_write_char(0x0C,0); //显示清屏
clr R18
clr R19
ldi R16,12
ldi R17,0
xcall _LCD_write_char
.dbline 27
; delay_nms(8);
ldi R16,8
ldi R17,0
xcall _delay_nms
.dbline 28
; LCD_write_char(0x01,0); //显示开
clr R18
clr R19
ldi R16,1
ldi R17,0
xcall _LCD_write_char
.dbline 29
; delay_nms(8);
ldi R16,8
ldi R17,0
xcall _delay_nms
.dbline -2
L1:
.dbline 0 ; func end
ret
.dbend
.dbfunc e LCD_write_char _LCD_write_char fV
; data_temp -> R22,R23
; command_temp -> R20,R21
; data -> R12,R13
; command -> R10,R11
.even
_LCD_write_char::
xcall push_gset4
movw R12,R18
movw R10,R16
.dbline -1
.dbline 47
;
; }
;
;
;
; /*-----------------------------------------------------------------------
; LCD_write_char : 中英文字符串显示函数
; LCD_write函数功能：当command＝0时，向LCD写入数据，否则向LCD写
; 入命令
; 输入参数：*s ：中英文字符串指针；
; X、Y : 显示字符串的位置，X:0-15，Y:0-1
; LCD第一行显示寄存器地址：0X80-0X87
; LCD第二行显示寄存器地址：0X90-0X9F
; LCD第三行显示寄存器地址：0X88-0X8F
; LCD第四行显示寄存器地址：0X98-0X9F
; -----------------------------------------------------------------------*/
; void LCD_write_char(unsigned command,unsigned data)
; {
.dbline 50
; unsigned command_temp;
; unsigned data_temp;
; command_temp = command;
movw R20,R10
.dbline 51
; data_temp = data;
movw R22,R12
.dbline 52
; if (command == 0)
cpi R20,0
cpc R20,R21
brne L3
X0:
.dbline 53
; {
.dbline 54
; LCD_DATA_PORT = data_temp; //send 8bit
out 0x1b,R22
.dbline 56
;
; LCD_RS_PORT |= LCD_RS; //RS=1
sbi 0x18,0
.dbline 58
;
; LCD_EN_PORT &= ~LCD_EN; //EN=0
cbi 0x18,1
.dbline 59
; delay_nus(2);
ldi R16,2
ldi R17,0
xcall _delay_nus
.dbline 60
; LCD_EN_PORT |= LCD_EN; //EN=1
sbi 0x18,1
.dbline 61
; delay_nus(500);
ldi R16,500
ldi R17,1
xcall _delay_nus
.dbline 62
; LCD_EN_PORT &= ~LCD_EN; //EN=0
cbi 0x18,1
.dbline 63
; }
xjmp L4
L3:
.dbline 65
.dbline 66
out 0x1b,R20
.dbline 68
cbi 0x18,0
.dbline 69
cbi 0x18,1
.dbline 70
ldi R16,2
ldi R17,0
xcall _delay_nus
.dbline 71
sbi 0x18,1
.dbline 72
ldi R16,500
ldi R17,1
xcall _delay_nus
.dbline 73
cbi 0x18,1
.dbline 74
L4:
.dbline -2
L2:
xcall pop_gset4
.dbline 0 ; func end
ret
.dbsym r data_temp 22 i
.dbsym r command_temp 20 i
.dbsym r data 12 i
.dbsym r command 10 i
.dbend
.dbfunc e LCD_set_xy _LCD_set_xy fV
; address -> R20
; y -> R20
; x -> R22
.even
_LCD_set_xy::
xcall push_gset2
mov R20,R18
mov R22,R16
.dbline -1
.dbline 90
; else
; {
; LCD_DATA_PORT = command_temp;//send command
;
; LCD_RS_PORT &= ~LCD_RS; //RS=0
; LCD_EN_PORT &= ~LCD_EN; //EN=0
; delay_nus(2);
; LCD_EN_PORT |= LCD_EN; //EN=1
; delay_nus(500);
; LCD_EN_PORT &= ~LCD_EN; //EN=0
; }
;
; }
;
;
; /*-----------------------------------------------------------------------
; LCD_set_xy : 设置LCD显示的起始位置
;
; 输入参数：x、y : 显示字符串的位置，X:0-15，Y:0-3
; LCD第一行显示寄存器地址：0X80-0X8F
; LCD第一行显示寄存器地址：0XC0-0XCF
;
; 编写日期 ：2005
; 最后修改日期 ：2005
; -----------------------------------------------------------------------*/
; void LCD_set_xy( unsigned char x, unsigned char y )
; {
.dbline 92
clr R21
cpi R20,0
cpc R20,R21
breq L9
X1:
cpi R20,1
ldi R30,0
cpc R21,R30
breq L10
cpi R20,2
ldi R30,0
cpc R21,R30
breq L11
cpi R20,3
ldi R30,0
cpc R21,R30
breq L12
xjmp L6
X2:
.dbline 92
; unsigned char address;
; switch(y){
L9:
.dbline 94
; case 0:
; address = 0x80 + x;
mov R20,R22
subi R20,128 ; addi 128
.dbline 95
; break;
xjmp L7
L10:
.dbline 97
; case 1:
; address = 0x90 + x;
mov R20,R22
subi R20,112 ; addi 144
.dbline 98
; break;
xjmp L7
L11:
.dbline 100
; case 2:
; address = 0x88 + x;
mov R20,R22
subi R20,120 ; addi 136
.dbline 101
; break;
xjmp L7
L12:
.dbline 103
; case 3:
; address = 0x98 + x;
mov R20,R22
subi R20,104 ; addi 152
.dbline 104
; break;
xjmp L7
L6:
.dbline 105
; default:address = 0x80 + x;}
mov R20,R22
subi R20,128 ; addi 128
.dbline 105
L7:
.dbline 106
; LCD_write_char( address, 0 );
clr R18
clr R19
mov R16,R20
clr R17
xcall _LCD_write_char
.dbline -2
L5:
xcall pop_gset2
.dbline 0 ; func end
ret
.dbsym r address 20 c
.dbsym r y 20 c
.dbsym r x 22 c
.dbend
.dbfunc e LCD_write_string _LCD_write_string fV
; s -> R20,R21
; Y -> R10
; X -> R22
.even
_LCD_write_string::
xcall push_gset3
mov R10,R18
mov R22,R16
ldd R20,y+6
ldd R21,y+7
.dbline -1
.dbline 119
;
; }
; /*-----------------------------------------------------------------------
; LCD_write_string : 中英文字符串显示函数
;
; 输入参数：*s ：英文字符串指针；
; X、Y : 显示字符串的位置
;
; 编写日期 ：2005
; 最后修改日期 ：2005
; -----------------------------------------------------------------------*/
; void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
; {
.dbline 120
; LCD_set_xy( X, Y );
mov R18,R10
mov R16,R22
xcall _LCD_set_xy
xjmp L15
L14:
.dbline 123
.dbline 124
movw R30,R20
ldd R18,z+0
clr R19
clr R16
clr R17
xcall _LCD_write_char
.dbline 125
subi R20,255 ; offset = 1
sbci R21,255
.dbline 126
ldi R16,5
ldi R17,0
xcall _delay_nms
.dbline 127
L15:
.dbline 122
;
; while (*s)
movw R30,R20
ldd R2,z+0
tst R2
brne L14
.dbline -2
L13:
xcall pop_gset3
.dbline 0 ; func end
ret
.dbsym r s 20 pc
.dbsym r Y 10 c
.dbsym r X 22 c
.dbend
.dbfunc e delay_1us _delay_1us fV
.even
_delay_1us::
.dbline -1
.dbline 135
; {
; LCD_write_char( 0, *s );
; s ++;
; delay_nms(5);
; }
; }
;
; /*-----------------------------------------------------------------------
; 延时函数
; 系统时钟：8M
; -----------------------------------------------------------------------*/
; void delay_1us(void) //1us延时函数
; {
.dbline 136
; asm("nop");
nop
.dbline -2
L17:
.dbline 0 ; func end
ret
.dbend
.dbfunc e delay_nus _delay_nus fV
; i -> R20,R21
; n -> R22,R23
.even
_delay_nus::
xcall push_gset2
movw R22,R16
.dbline -1
.dbline 140
; }
;
; void delay_nus(unsigned int n) //N us延时函数
; {
.dbline 141
; unsigned int i=0;
clr R20
clr R21
.dbline 142
; for (i=0;i<n;i++)
xjmp L22
L19:
.dbline 143
xcall _delay_1us
L20:
.dbline 142
subi R20,255 ; offset = 1
sbci R21,255
L22:
.dbline 142
cp R20,R22
cpc R21,R23
brlo L19
.dbline -2
L18:
xcall pop_gset2
.dbline 0 ; func end
ret
.dbsym r i 20 i
.dbsym r n 22 i
.dbend
.dbfunc e delay_1ms _delay_1ms fV
; i -> R16,R17
.even
_delay_1ms::
.dbline -1
.dbline 147
; delay_1us();
; }
;
; void delay_1ms(void) //1ms延时函数
; {
.dbline 149
clr R16
clr R17
xjmp L27
L24:
.dbline 149
L25:
.dbline 149
subi R16,255 ; offset = 1
sbci R17,255
L27:
.dbline 149
; unsigned int i;
; for (i=0;i<1140;i++);
cpi R16,116
ldi R30,4
cpc R17,R30
brlo L24
.dbline -2
L23:
.dbline 0 ; func end
ret
.dbsym r i 16 i
.dbend
.dbfunc e delay_nms _delay_nms fV
; i -> R20,R21
; n -> R22,R23
.even
_delay_nms::
xcall push_gset2
movw R22,R16
.dbline -1
.dbline 153
; }
;
; void delay_nms(unsigned int n) //N ms延时函数
; {
.dbline 154
; unsigned int i=0;
clr R20
clr R21
.dbline 155
; for (i=0;i<n;i++)
xjmp L32
L29:
.dbline 156
xcall _delay_1ms
L30:
.dbline 155
subi R20,255 ; offset = 1
sbci R21,255
L32:
.dbline 155
cp R20,R22
cpc R21,R23
brlo L29
.dbline -2
L28:
xcall pop_gset2
.dbline 0 ; func end
ret
.dbsym r i 20 i
.dbsym r n 22 i
.dbend
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