hard_i2c.s

meg16 的所有功能实例

	.module Hard_I2C.c
	.area data(ram, con, rel)
_BitTab::
	.blkb 2
	.area idata
	.byte 254,253
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 251,247
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbsym e BitTab _BitTab A[4:4]c
_DispTab::
	.blkb 2
	.area idata
	.byte 63,6
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.blkb 2
	.area idata
	.byte 91,'O
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.blkb 2
	.area idata
	.byte 'f,'m
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.blkb 2
	.area idata
	.byte 125,7
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.blkb 2
	.area idata
	.byte 127,'o
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbsym e DispTab _DispTab A[10:10]c
_DISP_DATA::
	.blkb 2
	.area idata
	.byte 0,0
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.blkb 2
	.area idata
	.byte 0,0
	.area data(ram, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbsym e DISP_DATA _DISP_DATA A[4:4]c
	.area text(rom, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbfunc e Delay_us _Delay_us fV
;           time -> R16,R17
	.even
_Delay_us::
	.dbline -1
	.dbline 99
; /****************************************Copyright (c)**************************************************
; **                               ADEmbed Development Co.,LTD.                                    
; **                                 http://www.adembed.com
; **--------------File Info-------------------------------------------------------------------------------
; ** File name:			Hard_I2C.c
; ** Last modified Date:  2008-12-13
; ** Last Version:		1.0
; ** Descriptions:		Hard_I2C Test.
; ** 
; **------------------------------------------------------------------------------------------------------
; ** Created by:			junbolu
; ** Created date:		2008-12-13
; ** Version:				1.0
; ** Descriptions:		
; **
; **------------------------------------------------------------------------------------------------------
; ** Modified by:
; ** Modified date:
; ** Version:
; ** Descriptions:
; **
; **------------------------------------------------------------------------------------------------------
; **ICC-AVR application builder : 2008-12-13
; **Target : M16
; **Crystal: 7.3728Mhz
; **PC0--->SCL		PC1--->SDA			  PD6--->Write_EN
; **
; **描述：按键K0被按下一次，数码管的最低位会加一，并存储在24C02中，下一次系统启动时，会读取此数据并显示。
; **      此程序采用的硬件I2C方式完成的24C02的读写。
; **
; **涉及知识点：
; **           硬件I2C
; **           
; **			
; *******************************************************************************************************/
; 
; #include<iom16v.h>
; #include<macros.h>
; #include"Define.h"
; 
; #define		fose	                        7372800
; 
; #define     SCL                                 0
; #define     SDA                                 1
;  
; #define 	i2c_ddr                         DDRC
; #define 	i2c_port                        PORTC
; #define 	i2c_pin                         PINC      
; 
; #define 	AT24C02_ADDR					0xA0  //EEPROM设备地址
; //定义I2C的延迟参数
; #define    DelayX	100			//7.3M=>1;	8.4M=>2.建议5，因为将来的ClockCPU可以是16M
; 
; 
; #define    SCL_1    {i2c_port|=1<<SCL;Delay_us(DelayX);}
; #define    SCL_0    {i2c_port&=~(1<<SCL);Delay_us(DelayX);}
; #define    SDA_1    {i2c_port|=1<<SDA;Delay_us(DelayX);}
; #define    SDA_0    {i2c_port&=~(1<<SDA);Delay_us(DelayX);}
; 
; #define	   Write_EN_DO        DDRD |= (1<<6);
; #define	   Write_EN_1         PORTD|= (1<<6);
; #define	   Write_EN_0         PORTD&=~(1<<6);
; 
; #define rd_device_add                  0xa1
; #define wr_device_add                  0xa0
; 
; //TWI状态定义
; //MT 主方式传输  MR 主方式接收 
; #define START 0x08  
; #define RE_START 0x10
; #define MT_SLA_ACK 0x18
; #define MT_SLA_NOACK 0x20
; #define MT_DATA_ACK  0x28
; #define MT_DATA_NOACK 0x30
; #define MR_SLA_ACK  0x40
; #define MR_SLA_NOACK 0x48
; #define MR_DATA_ACK 0x50
; #define MR_DATA_NOACK 0x58
; //常用TWI操作(主模式写和主模式读)
; #define Start()    	  (TWCR=(1<<TWINT)|(1<<TWSTA)|(1<<TWEN))
; #define Stop()     	  (TWCR=(1<<TWINT)|(1<<TWSTO)|(1<<TWEN))
; #define Wait()	   	  {while(!(TWCR&(1<<TWINT)));}     
; #define TestAck() 	  (TWSR&0xf8)
; #define SetAck()	  (TWCR|=(1<<TWEA))
; #define SetNoAck()    (TWCR&=~(1<<TWEA))
; #define Twi()	  	  (TWCR=(1<<TWINT)|(1<<TWEN))
; #define Write8Bit(x)  {TWDR=(x);TWCR=(1<<TWINT)|(1<<TWEN);} 
; unsigned char DISP_NUM;							//显示的位数
; unsigned char BitTab[]={0xFE,0xFD,0xFB,0xF7};	//三位位选码
; unsigned char DispTab[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; //LED字形码
; unsigned char DISP_DATA[4]={0,0,0,0};		    //显示的数字
; 
; void I2C_Ini(void);
; unsigned char i2c_Write(unsigned char RomAddress,unsigned char Wdata);
; unsigned char i2c_Read(unsigned char RomAddress);
; 
; 
; void Delay_us(unsigned int time)
; {
L2:
	.dbline 100
L3:
	.dbline 100
; while(time--);
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L2
	tst R3
	brne L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r time 16 i
	.dbend
	.dbfunc e Delay_ms _Delay_ms fV
;           time -> R20,R21
	.even
_Delay_ms::
	xcall push_gset1
	movw R20,R16
	.dbline -1
	.dbline 104
; }
; 
; void Delay_ms(unsigned int time)
; {
	xjmp L7
L6:
	.dbline 106
	.dbline 107
	ldi R16,1000
	ldi R17,3
	xcall _Delay_us
	.dbline 108
L7:
	.dbline 105
; while(time--)
	movw R2,R20
	subi R20,1
	sbci R21,0
	tst R2
	brne L6
	tst R3
	brne L6
X1:
	.dbline -2
L5:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r time 20 i
	.dbend
	.dbfunc e INT0_Init _INT0_Init fV
	.even
_INT0_Init::
	.dbline -1
	.dbline 111
; 	{
; 	Delay_us(1000);
; 	}
; }
; void INT0_Init()
; {
	.dbline 112
;  GIFR |=0X40;              //清楚标志位
	in R24,0x3a
	ori R24,64
	out 0x3a,R24
	.dbline 114
;  //MCUCR|=0X03; 			   //上升沿触发中断	
;  MCUCR|=0X02;MCUCR&=~0X01; //下降沿触发中断	
	in R24,0x35
	ori R24,2
	out 0x35,R24
	.dbline 114
	in R24,0x35
	andi R24,254
	out 0x35,R24
	.dbline 115
;  GICR |=0X40;  			   //使能外部中断0
	in R24,0x3b
	ori R24,64
	out 0x3b,R24
	.dbline -2
L9:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 4
	jmp _int0_isr
	.area text(rom, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbfunc e int0_isr _int0_isr fV
	.even
_int0_isr::
	xcall push_lset
	.dbline -1
	.dbline 120
; }
; 
; #pragma interrupt_handler int0_isr:2
; void int0_isr(void)
; {
	.dbline 121
;  DISP_DATA[3]++;
	lds R24,_DISP_DATA+3
	subi R24,255    ; addi 1
	sts _DISP_DATA+3,R24
	.dbline 122
;  if(DISP_DATA[3]>9)
	ldi R24,9
	lds R2,_DISP_DATA+3
	cp R24,R2
	brsh L12
	.dbline 123
;      {
	.dbline 124
; 	 DISP_DATA[3]=0;
	clr R2
	sts _DISP_DATA+3,R2
	.dbline 125
; 	 }
L12:
	.dbline 126
;  Write_EN_0;
	cbi 0x12,6
	.dbline 126
	.dbline 127
;  i2c_Write(0x02,DISP_DATA[3]);
	lds R18,_DISP_DATA+3
	ldi R16,2
	xcall _i2c_Write
	.dbline 128
;  Write_EN_1;
	sbi 0x12,6
	.dbline 128
	.dbline -2
L10:
	xcall pop_lset
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e Display _Display fV
	.even
_Display::
	.dbline -1
	.dbline 133
	.dbline 134
	clr R2
	out 0x1b,R2
	.dbline 135
	ldi R24,<_BitTab
	ldi R25,>_BitTab
	lds R30,_DISP_NUM
	clr R31
	add R30,R24
	adc R31,R25
	ldd R2,z+0
	out 0x18,R2
	.dbline 136
	ldi R24,<_DISP_DATA
	ldi R25,>_DISP_DATA
	lds R30,_DISP_NUM
	clr R31
	add R30,R24
	adc R31,R25
	ldd R30,z+0
	clr R31
	ldi R24,<_DispTab
	ldi R25,>_DispTab
	add R30,R24
	adc R31,R25
	ldd R2,z+0
	out 0x1b,R2
	.dbline 139
	lds R24,_DISP_NUM
	subi R24,255    ; addi 1
	sts _DISP_NUM,R24
	.dbline 140
	cpi R24,4
	brne L18
	.dbline 141
	clr R2
	sts _DISP_NUM,R2
L18:
	.dbline -2
L17:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 76
	jmp _timer0comp
	.area text(rom, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\HARD_I~1\Hard_I2C.c
	.dbfunc e timer0comp _timer0comp fV
	.even
_timer0comp::
	xcall push_lset
	.dbline -1
	.dbline 146
; }
; //显示函数，DISP_NUM决定显示哪个LED
; //采用共阴LED动态显示方法，定时中断函数里面调用
; void Display(void)		
; {
;  PORTA=0x00;					   			//清除显示再位选
;  PORTB=BitTab[DISP_NUM];					//PB口接位选
;  PORTA=DispTab[DISP_DATA[DISP_NUM]];		//PA口接LED的段码
; 
;  
;  DISP_NUM++;			//先显示高位，再显示低位
;  if(DISP_NUM==4)
;     DISP_NUM=0;
; }
; 
; #pragma interrupt_handler timer0comp:20
; void timer0comp (void)
; {
	.dbline 147
;  Display();
	xcall _Display
	.dbline -2
L20:
	xcall pop_lset
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 151
; } 
; 
; void main(void)
; {
	.dbline 153
;  
;  DDRA=0XFF;
	ldi R24,255
	out 0x1a,R24
	.dbline 154
;  PORTA=0X00;
	clr R2
	out 0x1b,R2
	.dbline 155
;  DDRB=0X0F;
	ldi R24,15
	out 0x17,R24
	.dbline 156
;  PORTB=0X00;
	out 0x18,R2
	.dbline 159
;  
;  //按键0端口初始化
;  DDRD &=~0x04;	   	//设置PD2为输入   	   						
	cbi 0x11,2
	.dbline 160
;  PORTD|=0x04;		//设置PD2为上拉
	sbi 0x12,2
	.dbline 162
;  
;  INT0_Init();                 //TART初始化
	xcall _INT0_Init
	.dbline 165
;  
;  //t/c0初始化(10ms)
;  TCCR0=0X0d;
	ldi R24,13
	out 0x33,R24
	.dbline 166
;  TCNT0=0X00;
	clr R2
	out 0x32,R2
	.dbline 167
;  OCR0=0X48;
	ldi R24,72
	out 0x3c,R24
	.dbline 168
;  TIMSK=0X02;
	ldi R24,2
	out 0x39,R24
	.dbline 171
; 
;  //asm("sei");
;  SEI();                       //全局中断使能
	sei
	.dbline 174
;  
;  //I2C_Ini();
;  TWSR = 0X03;							/* TWI clock prescaler (TWPS) value = 0 */	
	ldi R24,3
	out 0x1,R24
	.dbline 175
;  TWBR = 0X10;	
	ldi R24,16
	out 0x0,R24
	.dbline 177
; 
;  TWCR=(1<<TWINT)|(1<<TWSTA)|(1<<TWEN);
	ldi R24,164
	out 0x36,R24
	.dbline 179
;  
;  Write_EN_DO;
	sbi 0x11,6
	.dbline 179
	.dbline 180
;  Write_EN_1;