lcd1602四线接口应用范例.lst

LCD1602四线接口应用范例（AVR_GCC）

__start:
__text_start:
    0043 E5CF      LDI	R28,0x5F
    0044 E0D4      LDI	R29,4
    0045 BFCD      OUT	0x3D,R28
    0046 BFDE      OUT	0x3E,R29
    0047 51C0      SUBI	R28,0x10
    0048 40D0      SBCI	R29,0
    0049 EA0A      LDI	R16,0xAA
    004A 8308      STD	Y+0,R16
    004B 2400      CLR	R0
    004C E6E3      LDI	R30,0x63
    004D E0F0      LDI	R31,0
    004E E010      LDI	R17,0
    004F 3AEE      CPI	R30,0xAE
    0050 07F1      CPC	R31,R17
    0051 F011      BEQ	0x0054
    0052 9201      ST	R0,Z+
    0053 CFFB      RJMP	0x004F
    0054 8300      STD	Z+0,R16
    0055 E8E3      LDI	R30,0x83
    0056 E0F0      LDI	R31,0
    0057 E6A0      LDI	R26,0x60
    0058 E0B0      LDI	R27,0
    0059 E010      LDI	R17,0
    005A 38E6      CPI	R30,0x86
    005B 07F1      CPC	R31,R17
    005C F021      BEQ	0x0061
    005D 95C8      LPM
    005E 9631      ADIW	R30,1
    005F 920D      ST	R0,X+
    0060 CFF9      RJMP	0x005A
    0061 D39C      RCALL	_main
_exit:
    0062 CFFF      RJMP	_exit
FILE: E:\刻录的\电子技术\项目\驱动程序\LCD1602四线接口应用范例\LCD_1602_Driver.c
(0001) #include <iom8v.h>
(0002) #include <macros.h>
(0003) #include "LCD_1602.h"
(0004) void delay_nms(unsigned int n);
(0005) void delay_nus(unsigned int n);
(0006) unsigned char lcd_data[32];//32字节显存,记录LCD上显示的数据
(0007) unsigned char data[32];//32字节缓存,保存将要写入LCD的数据
(0008) unsigned char add;//显存地址标号
(0009) unsigned char new=32;//显存标号 
(0010) unsigned int num=0;
(0011) /**********************************************************
(0012) TC1602B LCD DISPLAY
(0013) 建立时间：2005年12月12号
(0014) 修改日期：2005年12月12号
(0015) LCD_write函数功能：当command＝0时，向LCD写入数据，否则向LCD写
(0016)                    入命令
(0017) LCD第一行显示寄存器地址：0X80-0X8F
(0018) LCD第二行显示寄存器地址：0XC0-0XCF
(0019) **********************************************************/
(0020) void LCD_init(void)
(0021)   { 
(0022)      LCD_EN_DDR|=LCD_EN;//设定该引脚方向为输出
_LCD_init:
    0063 9A8E      SBI	0x11,6
(0023) 	 LCD_RS_DDR|=LCD_RS;//设定该引脚方向为输出
    0064 9A8F      SBI	0x11,7
(0024) 	 LCD_D4_DDR|=LCD_D4;//设定数据口为输出 
    0065 9A8D      SBI	0x11,5
(0025) 	 LCD_D5_DDR|=LCD_D5;//设定数据口为输出  
    0066 9A8C      SBI	0x11,4
(0026) 	 LCD_D6_DDR|=LCD_D6;//设定数据口为输出  
    0067 9A8B      SBI	0x11,3
(0027) 	 LCD_D7_DDR|=LCD_D7;//设定数据口为输出
    0068 9A8A      SBI	0x11,2
(0028) 	 
(0029) 	  LCD_EN_PORT&=~LCD_EN;//EN设为低电平
    0069 9896      CBI	0x12,6
(0030) 	  LCD_RS_PORT&=~LCD_RS;//RS设为低电平
    006A 9897      CBI	0x12,7
(0031) 	  LCD_D4_PORT&=~LCD_D4;//数据口置低电平
    006B 9895      CBI	0x12,5
(0032) 	  LCD_D5_PORT&=~LCD_D5;//数据口置低电平
    006C 9894      CBI	0x12,4
(0033) 	  LCD_D6_PORT&=~LCD_D6;//数据口置低电平
    006D 9893      CBI	0x12,3
(0034) 	  LCD_D7_PORT&=~LCD_D7;//数据口置低电平
    006E 9892      CBI	0x12,2
(0035) 	  
(0036)     LCD_write_char(0,0x33);      //4bit test
    006F E323      LDI	R18,0x33
    0070 E030      LDI	R19,0
    0071 2700      CLR	R16
    0072 2711      CLR	R17
    0073 D02E      RCALL	_LCD_write_char
(0037) 	delay_nms(25);
    0074 E109      LDI	R16,0x19
    0075 E010      LDI	R17,0
    0076 D403      RCALL	_delay_nms
(0038) 	LCD_write_char(0,0x32);
    0077 E322      LDI	R18,0x32
    0078 E030      LDI	R19,0
    0079 2700      CLR	R16
    007A 2711      CLR	R17
    007B D026      RCALL	_LCD_write_char
(0039) 	delay_nms(15);
    007C E00F      LDI	R16,0xF
    007D E010      LDI	R17,0
    007E D3FB      RCALL	_delay_nms
(0040) 	LCD_write_char(0,0x28);
    007F E228      LDI	R18,0x28
    0080 E030      LDI	R19,0
    0081 2700      CLR	R16
    0082 2711      CLR	R17
    0083 D01E      RCALL	_LCD_write_char
(0041) 	delay_nms(15);
    0084 E00F      LDI	R16,0xF
    0085 E010      LDI	R17,0
    0086 D3F3      RCALL	_delay_nms
(0042)     LCD_write_char(0,0x0C);      //显示开
    0087 E02C      LDI	R18,0xC
    0088 E030      LDI	R19,0
    0089 2700      CLR	R16
    008A 2711      CLR	R17
    008B D016      RCALL	_LCD_write_char
(0043) 	delay_nms(15);
    008C E00F      LDI	R16,0xF
    008D E010      LDI	R17,0
    008E D3EB      RCALL	_delay_nms
(0044)     LCD_write_char(0,0x01);      //显示清屏
    008F E021      LDI	R18,1
    0090 E030      LDI	R19,0
    0091 2700      CLR	R16
    0092 2711      CLR	R17
    0093 D00E      RCALL	_LCD_write_char
(0045) 	delay_nms(15);
    0094 E00F      LDI	R16,0xF
    0095 E010      LDI	R17,0
    0096 D3E3      RCALL	_delay_nms
(0046)     LCD_write_char(0,0x06);      //显示光标移动设置	
    0097 E026      LDI	R18,6
    0098 E030      LDI	R19,0
    0099 2700      CLR	R16
    009A 2711      CLR	R17
    009B D006      RCALL	_LCD_write_char
(0047) 	LCD_clear();
    009C D068      RCALL	_LCD_clear
(0048) 	delay_nms(10);
    009D E00A      LDI	R16,0xA
    009E E010      LDI	R17,0
    009F D3DA      RCALL	_delay_nms
(0049) 	LCD_init_CGRAM(); 
    00A0 D32D      RCALL	_LCD_init_CGRAM
    00A1 9508      RET
_LCD_write_char:
  data                 --> R20
  command              --> R22
    00A2 D4A0      RCALL	push_gset2
    00A3 01A9      MOVW	R20,R18
    00A4 01B8      MOVW	R22,R16
(0050)   }
(0051) /*-----------------------------------------------------------------------
(0052) LCD_write_char    : 写一个字节到LCD的函数
(0053) 编写日期             ：2005-12-12 
(0054) 最后修改日期      ：2005-12-12 		
(0055) -----------------------------------------------------------------------*/
(0056) void LCD_write_char(unsigned command,unsigned data)
(0057)   { 
(0058)     if (command == 0)
    00A5 3060      CPI	R22,0
    00A6 0767      CPC	R22,R23
    00A7 F411      BNE	0x00AA
(0059)    	LCD_RS_PORT &= ~LCD_RS;   //RS=0  写地址
    00A8 9897      CBI	0x12,7
    00A9 C001      RJMP	0x00AB
(0060) 	else
(0061)     LCD_RS_PORT |= LCD_RS;    //RS=1 写数据
    00AA 9A97      SBI	0x12,7
(0062) 	
(0063)     LCD_write_DATA_PORT(data);//写高4位
    00AB 2F04      MOV	R16,R20
    00AC D018      RCALL	_LCD_write_DATA_PORT
(0064)     LCD_write_DATA_PORT(data<<4);//写低4位
    00AD 2F04      MOV	R16,R20
    00AE 0F00      LSL	R16
    00AF 1F11      ROL	R17
    00B0 0F00      LSL	R16
    00B1 1F11      ROL	R17
    00B2 0F00      LSL	R16
    00B3 1F11      ROL	R17
    00B4 0F00      LSL	R16
    00B5 1F11      ROL	R17
    00B6 D00E      RCALL	_LCD_write_DATA_PORT
(0065) 	delay_nus(250);
    00B7 EF0A      LDI	R16,0xFA
    00B8 E010      LDI	R17,0
    00B9 D3CD      RCALL	_delay_nus
(0066) 	num++;//统计向LCD发送的字节数
    00BA 91800061  LDS	R24,num
    00BC 91900062  LDS	R25,num+1
    00BE 9601      ADIW	R24,1
    00BF 93900062  STS	num+1,R25
    00C1 93800061  STS	num,R24
    00C3 D475      RCALL	pop_gset2
    00C4 9508      RET
_LCD_write_DATA_PORT:
  data                 --> R20
    00C5 D47F      RCALL	push_gset1
    00C6 2F40      MOV	R20,R16
(0067)   }
(0068) /*-----------------------------------------------------------------------
(0069) LCD_write_DATA_PORT : 写数据到LCD数据口函数
(0070) 
(0071) 输入参数data   ：要写入的数据(仅高4位)
(0072) 编写日期          ：2005-12-12
(0073) 最后修改日期   ：2005-12-12 		
(0074) -----------------------------------------------------------------------*/
(0075) void LCD_write_DATA_PORT(unsigned char data)
(0076) {   
(0077)     if((data>>4)%2)
    00C7 E012      LDI	R17,2
    00C8 2F04      MOV	R16,R20
    00C9 9502      SWAP	R16
    00CA 700F      ANDI	R16,0xF
    00CB D455      RCALL	mod8u
    00CC 2300      TST	R16
    00CD F011      BEQ	0x00D0
(0078) 	  LCD_D4_PORT |=LCD_D4;
    00CE 9A95      SBI	0x12,5
    00CF C001      RJMP	0x00D1
(0079) 	else
(0080) 	  LCD_D4_PORT &=~LCD_D4;
    00D0 9895      CBI	0x12,5
(0081) 	
(0082) 	if((data>>5)%2)
    00D1 E012      LDI	R17,2
    00D2 2F04      MOV	R16,R20
    00D3 9506      LSR	R16
    00D4 9506      LSR	R16
    00D5 9506      LSR	R16
    00D6 9506      LSR	R16
    00D7 9506      LSR	R16
    00D8 D448      RCALL	mod8u
    00D9 2300      TST	R16
    00DA F011      BEQ	0x00DD
(0083) 	  LCD_D5_PORT |=LCD_D5;
    00DB 9A94      SBI	0x12,4
    00DC C001      RJMP	0x00DE
(0084) 	else
(0085) 	  LCD_D5_PORT &=~LCD_D5;
    00DD 9894      CBI	0x12,4
(0086) 	  
(0087) 	if((data>>6)%2)
    00DE E012      LDI	R17,2
    00DF 2F04      MOV	R16,R20
    00E0 9506      LSR	R16
    00E1 9506      LSR	R16
    00E2 9506      LSR	R16
    00E3 9506      LSR	R16
    00E4 9506      LSR	R16
    00E5 9506      LSR	R16
    00E6 D43A      RCALL	mod8u
    00E7 2300      TST	R16
    00E8 F011      BEQ	0x00EB
(0088) 	  LCD_D6_PORT |=LCD_D6;
    00E9 9A93      SBI	0x12,3
    00EA C001      RJMP	0x00EC
(0089) 	else
(0090) 	  LCD_D6_PORT &=~LCD_D6;
    00EB 9893      CBI	0x12,3
(0091) 	  
(0092) 	if((data>>7)%2)
    00EC E012      LDI	R17,2
    00ED 2F04      MOV	R16,R20
    00EE 9506      LSR	R16
    00EF 9506      LSR	R16
    00F0 9506      LSR	R16
    00F1 9506      LSR	R16
    00F2 9506      LSR	R16
    00F3 9506      LSR	R16
    00F4 9506      LSR	R16
    00F5 D42B      RCALL	mod8u
    00F6 2300      TST	R16
    00F7 F011      BEQ	0x00FA
(0093) 	  LCD_D7_PORT |=LCD_D7;
    00F8 9A92      SBI	0x12,2
    00F9 C001      RJMP	0x00FB
(0094) 	else
(0095) 	  LCD_D7_PORT &=~LCD_D7;
    00FA 9892      CBI	0x12,2
(0096) 	  
(0097) 	  LCD_EN_PORT |= LCD_EN; //EN端产生一个由低电平变高电平，写LCD
    00FB 9A96      SBI	0x12,6
(0098) 	  delay_nus(25);
    00FC E109      LDI	R16,0x19
    00FD E010      LDI	R17,0
    00FE D388      RCALL	_delay_nus
(0099)       LCD_EN_PORT &= ~LCD_EN; //EN端产生一个由高电平变低电平，写LCD
    00FF 9896      CBI	0x12,6
(0100) 	  delay_nus(25);
    0100 E109      LDI	R16,0x19
    0101 E010      LDI	R17,0
    0102 D384      RCALL	_delay_nus
    0103 D444      RCALL	pop_gset1
    0104 9508      RET
_LCD_clear:
  i                    --> R20
    0105 D43F      RCALL	push_gset1
(0101) }
(0102) /*-----------------------------------------------------------------------
(0103) LCD_clear    : 清除屏幕的函数
(0104) 
(0105) 输入参数      ：无
(0106) 编写日期      ：2005/10/18	
(0107)        说明      ：	lcd_data[]也会被清0
(0108) -----------------------------------------------------------------------*/
(0109) void LCD_clear(void)
(0110)   {  
(0111)      unsigned char i;
(0112)      LCD_write_char(0,0x01);//显示清屏
    0106 E021      LDI	R18,1
    0107 E030      LDI	R19,0
    0108 2700      CLR	R16
    0109 2711      CLR	R17
    010A DF97      RCALL	_LCD_write_char
(0113) 	 for(i=0;i<32;i++)
    010B 2744      CLR	R20
    010C C009      RJMP	0x0116
(0114) 	   {
(0115) 	      lcd_data[i]=0;
    010D E884      LDI	R24,0x84
    010E E090      LDI	R25,0
    010F 2FE4      MOV	R30,R20
    0110 27FF      CLR	R31
    0111 0FE8      ADD	R30,R24
    0112 1FF9      ADC	R31,R25
    0113 2422      CLR	R2
    0114 8220      STD	Z+0,R2
    0115 9543      INC	R20
    0116 3240      CPI	R20,0x20
    0117 F3A8      BCS	0x010D
(0116) 	   }
(0117) 	   delay_nus(500);
    0118 EF04      LDI	R16,0xF4
    0119 E011      LDI	R17,1
    011A D36C      RCALL	_delay_nus
    011B D42C      RCALL	pop_gset1
    011C 9508      RET
_LCD_check:
  lcd                  --> Y+0
  i                    --> R20
  y                    --> R22
  x                    --> R20
    011D D425      RCALL	push_gset2
    011E 2F62      MOV	R22,R18
    011F 2F40      MOV	R20,R16
    0120 9722      SBIW	R28,2
(0118)   }
(0119) /*-----------------------------------------------------------------------
(0120) LCD_check   : 统计发送数据到LCD次数的函数
(0121) 
(0122) 输入参数      ：x,y 显示结果的座标
(0123) 编写日期      ：2005/10/18	
(0124)        说明      ：如果每秒调用一次，就是统计每秒的次数
(0125) -----------------------------------------------------------------------*/ 
(0126) void LCD_check(unsigned char x,unsigned char y) //检测每秒钟写LCD
(0127)                                                                       //次数的函数
(0128)   {  
(0129)     unsigned char  i;
(0130) 	unsigned char  lcd[2]={0};
    0121 E286      LDI	R24,0x26
    0122 E090      LDI	R25,0
    0123 01FE      MOVW	R30,R28
    0124 E002      LDI	R16,2
    0125 E010      LDI	R17,0
    0126 93FA      ST	R31,-Y
    0127 93EA      ST	R30,-Y
    0128 939A      ST	R25,-Y
    0129 938A      ST	R24,-Y
    012A D431      RCALL	asgncblk
(0131) 	add=y*16+x;//设置起始座标
    012B E180      LDI	R24,0x10
    012C 9F86      MUL	R24,R22
    012D 2C20      MOV	R2,R0
    012E 0E24      ADD	R2,R20
    012F 92200063  STS	add,R2
(0132)         lcd[0]=num/10+48;
    0131 E02A      LDI	R18,0xA
    0132 E030      LDI	R19,0
    0133 91000061  LDS	R16,num
    0135 91100062  LDS	R17,num+1
    0137 D35E      RCALL	div16u
    0138 01C8      MOVW	R24,R16
    0139 96C0      ADIW	R24,0x30
    013A 8388      STD	Y+0,R24
(0133) 		lcd[1]=num%10+48;
    013B E02A      LDI	R18,0xA
    013C E030      LDI	R19,0
    013D 91000061  LDS	R16,num
    013F 91100062  LDS	R17,num+1
    0141 D352      RCALL	mod16u
    0142 01C8      MOVW	R24,R16
    0143 96C0      ADIW	R24,0x30
    0144 8389      STD	Y+1,R24
(0134) 	num=0;  
    0145 2422      CLR	R2
    0146 2433      CLR	R3
    0147 92300062  STS	num+1,R3
    0149 92200061  STS	num,R2
(0135)    for (i=0;i<2;i++) 
    014B 2744      CLR	R20
    014C C025      RJMP	0x0172
(0136)       {
(0137)               if(lcd_data[add]==lcd[i]){}
    014D 01CE      MOVW	R24,R28
    014E 2FE4      MOV	R30,R20
    014F 27FF      CLR	R31
    0150 0FE8      ADD	R30,R24
    0151 1FF9      ADC	R31,R25
    0152 8020      LDD	R2,Z+0
    0153 E884      LDI	R24,0x84
    0154 E090      LDI	R25,0
    0155 91E00063  LDS	R30,add
    0157 27FF      CLR	R31
    0158 0FE8      ADD	R30,R24
    0159 1FF9      ADC	R31,R25
    015A 8030      LDD	R3,Z+0
    015B 1432      CP	R3,R2
    015C F409      BNE	0x015E
    015D C00E      RJMP	0x016C
(0138) 			  else
(0139) 			     {data[add]=lcd[i];}
    015E 01CE      MOVW	R24,R28
    015F 2FE4      MOV	R30,R20
    0160 27FF      CLR	R31
    0161 0FE8      ADD	R30,R24
    0162 1FF9      ADC	R31,R25
    0163 8020      LDD	R2,Z+0
    0164 E684      LDI	R24,0x64
    0165 E090      LDI	R25,0
    0166 91E00063  LDS	R30,add
    0168 27FF      CLR	R31
    0169 0FE8      ADD	R30,R24
    016A 1FF9      ADC	R31,R25
    016B 8220      STD	Z+0,R2