?? i2c_demo.s
字號:
.module I2C_Demo.c
.area text(rom, con, rel)
.dbfile E:\MyWorks\SOFT\I2C_E2PROM\I2C_Demo.c
.dbfunc e EEPROM_Write _EEPROM_Write fV
; Data -> y+5
; M_ADD -> R10,R11
; H_ADD -> R12
.even
_EEPROM_Write::
xcall push_xgset003C
movw R10,R18
mov R12,R16
sbiw R28,1
.dbline -1
.dbline 72
; // *************** I2C driver Demo V 1.0 *************
; // IO模擬方式的I2C接口操作
; // *******************************************************
;
; #include <iom1281v.h>
; #include <MACROS.h>
;
; #include <DC_Defines.h>
;
; #include "I2C.h"
;
;
;
; void EEPROM_Write(unsigned char, unsigned int, unsigned char);
; unsigned char EEPROM_Read(unsigned char, unsigned int);
;
;
; // **************************************************************** //
; // *** Init_I2C(); *** //
; // *** This routine will setup the I2C port direction registers *** //
; // **************************************************************** //
;
; // ***************************************************************** //
; // *** I2C_Start(); *** //
; // *** This routine will set the I2C start condition on the bus, *** //
; // *** All commands must be preceded by a START condition *** //
; // ***************************************************************** //
;
; // ***************************************************************** //
; // *** I2C_Stop(); *** //
; // *** This routine will set the I2C stop condition on the bus, *** //
; // *** All commands must end with a STOP condition *** //
; // ***************************************************************** //
;
; // *********************************************************************** //
; // *** Write_I2C_Control(0x0A,0,0); *** //
; // *** This routine will write the I2C device code, the device address *** //
; // *** setup on the hardware pins A0,A1 & A2, and also the W/R bit *** //
; // *** So for an external EEPROM, such as the 24LC04B you would need *** //
; // *** a device code of 1010 (0x0A), *** //
; // *** hardware address 0 (if pins A0,A1 & A2 are left unconnected, *** //
; // *** and the last parameter is R/W. Write is active low *** //
; // *********************************************************************** //
;
; // *********************************************************************** //
; // *** I2C_Ackn(); *** //
; // *** This routine will clock the ACK bit from the I2C slave device *** //
; // *** it will return TRUE for a fail, and FALSE for a correct ACK bit *** //
; // *********************************************************************** //
;
; // ************************************************************** //
; // *** Write_I2C_Byte(); *** //
; // *** This routine will clock a byte to the slave I2C device *** //
; // ************************************************************** //
;
; // ************************************************************************** //
; // *** Read_I2C_Byte(); *** //
; // *** This routine will read and return a byte from the I2C slave device *** //
; // ************************************************************************** //
;
;
;
; // *********************************************************************** //
; // *** Example of using Imagecraft I2C driver *** //
; // *** to write to an external 8 bit address EEPROM *** //
; // *** H_ADD is the hardware address set on the device A0,A1 & A2 pins *** //
; // *** M_ADD is the devices internal memory address *** //
; // *** Data is user data to be writen *** //
; // *********************************************************************** //
;
; void EEPROM_Write(unsigned char H_ADD, unsigned int M_ADD, unsigned char Data)
; {
.dbline 73
; I2C_Start(); // Set I2C start condition
xcall _I2C_Start
.dbline 75
;
; Write_I2C_Control(0x0A,H_ADD,0); // Send the EEPROM control Byte
clr R2
std y+0,R2
mov R18,R12
ldi R16,10
xcall _Write_I2C_Control
.dbline 77
;
; Write_I2C_Byte(M_ADD>>8); // Send the EEPROM internal Address higher byte.
movw R16,R10
mov R16,R17
clr R17
xcall _Write_I2C_Byte
.dbline 79
;
; Write_I2C_Byte(M_ADD); // Send the EEPROM internal Address lower byte.
mov R16,R10
xcall _Write_I2C_Byte
.dbline 81
;
; Write_I2C_Byte(Data); // Send the EEPROM Data
ldd R16,y+5
xcall _Write_I2C_Byte
.dbline 83
;
; I2C_Stop(); // Set I2C Stop condition
xcall _I2C_Stop
.dbline -2
L1:
.dbline 0 ; func end
adiw R28,1
xjmp pop_xgset003C
.dbsym l Data 5 c
.dbsym r M_ADD 10 i
.dbsym r H_ADD 12 c
.dbend
.dbfunc e EEPROM_Read _EEPROM_Read fc
; Temp -> R10
; M_ADD -> R12,R13
; H_ADD -> R10
.even
_EEPROM_Read::
xcall push_xgset003C
movw R12,R18
mov R10,R16
sbiw R28,1
.dbline -1
.dbline 97
; }
;
;
;
; // *********************************************************************** //
; // *** Example of using Imagecraft I2C driver *** //
; // *** to Read an external 8 bit address EEPROM *** //
; // *** H_ADD is the hardware address set on the device A0,A1 & A2 pins *** //
; // *** M_ADD is the devices internal memory address *** //
; // *** Data is user data to be writen *** //
; // *********************************************************************** //
;
; unsigned char EEPROM_Read(unsigned char H_ADD, unsigned int M_ADD)
; {
.dbline 100
; unsigned char Temp; // Temp RAM for EEPROM Read
;
; I2C_Start(); // Set I2C start condition
xcall _I2C_Start
.dbline 102
;
; Write_I2C_Control(0x0A,H_ADD,0); // Send the EEPROM control Byte
clr R2
std y+0,R2
mov R18,R10
ldi R16,10
xcall _Write_I2C_Control
.dbline 105
; // Dummy write to set address
;
; Write_I2C_Byte(M_ADD>>8); // Send the EEPROM internal Address Higher byte.
movw R16,R12
mov R16,R17
clr R17
xcall _Write_I2C_Byte
.dbline 106
; Write_I2C_Byte(M_ADD); // Send the EEPROM internal Address lower byte.
mov R16,R12
xcall _Write_I2C_Byte
.dbline 108
;
; I2C_Start(); // Set I2C start condition
xcall _I2C_Start
.dbline 110
;
; Write_I2C_Control(0x0A,H_ADD,1); // Send the EEPROM control Byte
ldi R24,1
std y+0,R24
mov R18,R10
ldi R16,10
xcall _Write_I2C_Control
.dbline 112
;
; Temp = Read_I2C_Byte(); // Read data from EEPROM
xcall _Read_I2C_Byte
mov R10,R16
.dbline 114
;
; I2C_Stop(); // Set I2C Stop condition
xcall _I2C_Stop
.dbline 116
;
; return Temp; // Return data from EEPROM
mov R16,R10
.dbline -2
L2:
.dbline 0 ; func end
adiw R28,1
xjmp pop_xgset003C
.dbsym r Temp 10 c
.dbsym r M_ADD 12 i
.dbsym r H_ADD 10 c
.dbend
.dbfunc e main _main fV
; k -> R12
; data -> y+1
; j -> R10
; i -> R22,R23
; c -> R20,R21
.even
_main::
sbiw R28,2
.dbline -1
.dbline 125
; }
;
;
;
;
; //AT24C512B使用2BYTE片內地址。
; unsigned char bf[26];
; void main (void)
; {
.dbline 131
; unsigned int i;
; unsigned char j, k;
; unsigned int c; // Temp Ram used for write delay
; volatile unsigned char data;
;
; DDRG |=BIT(PG1);
sbi 0x13,1
.dbline 132
; PORTG |=BIT(PG1); //VCC =high.
sbi 0x14,1
.dbline 134
;
; I2C_DIR |= BIT(PD0)|BIT(PD1); // Set Port B to Outputs
in R24,0xa
ori R24,3
out 0xa,R24
.dbline 136
;
; Init_I2C(); // Setup the hardware port
xcall _Init_I2C
xjmp L5
L4:
.dbline 139
;
; while (true)
; {
.dbline 140
; for (k=0,i=0x1050, j='A'; 1; i++,j++ )
clr R12
ldi R22,4176
ldi R23,16
ldi R24,65
mov R10,R24
xjmp L10
L7:
.dbline 141
; {
.dbline 142
; EEPROM_Write( 1 , i , j );
std y+0,R10
movw R18,R22
ldi R16,1
xcall _EEPROM_Write
.dbline 144
;
; for(c=0;c<5000;c++); // Delay for EEPROM Write
clr R20
clr R21
xjmp L14
L11:
.dbline 144
L12:
.dbline 144
subi R20,255 ; offset = 1
sbci R21,255
L14:
.dbline 144
cpi R20,136
ldi R30,19
cpc R21,R30
brlo L11
X0:
.dbline 146
;
; data = EEPROM_Read( 1, i ); // Read device 1, memory address 1
movw R18,R22
ldi R16,1
xcall _EEPROM_Read
std y+1,R16
.dbline 147
; bf[k++] =data;
mov R2,R12
clr R3
mov R24,R2
subi R24,255 ; addi 1
mov R12,R24
ldi R24,<_bf
ldi R25,>_bf
mov R30,R2
clr R31
add R30,R24
adc R31,R25
mov R2,R16
std z+0,R2
.dbline 148
; if (j=='Z') break;
mov R24,R10
cpi R24,90
brne L15
X1:
.dbline 148
xjmp L9
L15:
.dbline 150
;
; }
L8:
.dbline 140
subi R22,255 ; offset = 1
sbci R23,255
inc R10
L10:
.dbline 140
xjmp L7
L9:
.dbline 152
;
; for(c=0;c<5000;c++); // Delay for EEPROM Write
clr R20
clr R21
xjmp L20
L17:
.dbline 152
L18:
.dbline 152
subi R20,255 ; offset = 1
sbci R21,255
L20:
.dbline 152
cpi R20,136
ldi R30,19
cpc R21,R30
brlo L17
X2:
.dbline 153
; }
L5:
.dbline 138
xjmp L4
X3:
.dbline -2
L3:
.dbline 0 ; func end
adiw R28,2
ret
.dbsym r k 12 c
.dbsym l data 1 c
.dbsym r j 10 c
.dbsym r i 22 i
.dbsym r c 20 i
.dbend
.area bss(ram, con, rel)
.dbfile E:\MyWorks\SOFT\I2C_E2PROM\I2C_Demo.c
_bf::
.blkb 26
.dbsym e bf _bf A[26:26]c
;
; }
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