📄 avr_gy-29.s
字号:
.module AVR_GY-29.c
.area text(rom, con, rel)
.dbfile D:\MCU_Project\MCU_AVR\AVR_GY-29\AVR_GY-29.c
.dbfile D:\MCU_Project\MCU_AVR\AVR_GY-29\delay.h
.dbfunc e delay_1us _delay_1us fV
.even
_delay_1us::
.dbline -1
.dbline 15
; /*-----------------------------------------------------------------------
; 延时函数
; 编译器：ICC-AVR v6.31A
; 目标芯片 : M16
; 时钟: 8.0000Mhz
; -----------------------------------------------------------------------*/
; #ifndef __delay_h
; #define __delay_h
; void delay_nus(unsigned int n);
; void delay_nms(unsigned int n);
; void delay_1us(void);
; void delay_1ms(void) ;
;
; void delay_1us(void) //1us延时函数
; {
.dbline 16
; asm("nop");
nop
.dbline 17
; asm("nop");
nop
.dbline 18
; asm("nop");
nop
.dbline 19
; asm("nop");
nop
.dbline 20
; asm("nop");
nop
.dbline -2
L1:
.dbline 0 ; func end
ret
.dbend
.dbfunc e delay_nus _delay_nus fV
; i -> R20,R21
; n -> R10,R11
.even
_delay_nus::
xcall push_xgset300C
movw R10,R16
.dbline -1
.dbline 24
; }
;
; void delay_nus(unsigned int n) //N us延时函数
; {
.dbline 25
; unsigned int i=0;
clr R20
clr R21
.dbline 26
; for (i=0;i<n;i++)
xjmp L6
L3:
.dbline 27
; delay_1us();
xcall _delay_1us
L4:
.dbline 26
subi R20,255 ; offset = 1
sbci R21,255
L6:
.dbline 26
cp R20,R10
cpc R21,R11
brlo L3
X0:
.dbline -2
L2:
.dbline 0 ; func end
xjmp pop_xgset300C
.dbsym r i 20 i
.dbsym r n 10 i
.dbend
.dbfunc e delay_1ms _delay_1ms fV
; i -> R16,R17
.even
_delay_1ms::
.dbline -1
.dbline 31
; }
;
; void delay_1ms(void) //1ms延时函数
; {
.dbline 33
; unsigned int i;
; for (i=0;i<500;i++);
clr R16
clr R17
xjmp L11
L8:
.dbline 33
L9:
.dbline 33
subi R16,255 ; offset = 1
sbci R17,255
L11:
.dbline 33
cpi R16,244
ldi R30,1
cpc R17,R30
brlo L8
X1:
.dbline -2
L7:
.dbline 0 ; func end
ret
.dbsym r i 16 i
.dbend
.dbfunc e delay_nms _delay_nms fV
; i -> R20,R21
; n -> R10,R11
.even
_delay_nms::
xcall push_xgset300C
movw R10,R16
.dbline -1
.dbline 37
; }
;
; void delay_nms(unsigned int n) //N ms延时函数
; {
.dbline 38
; unsigned int i=0;
clr R20
clr R21
.dbline 39
; for (i=0;i<n;i++)
xjmp L16
L13:
.dbline 40
; delay_1ms();
xcall _delay_1ms
L14:
.dbline 39
subi R20,255 ; offset = 1
sbci R21,255
L16:
.dbline 39
cp R20,R10
cpc R21,R11
brlo L13
X2:
.dbline -2
L12:
.dbline 0 ; func end
xjmp pop_xgset300C
.dbsym r i 20 i
.dbsym r n 10 i
.dbend
.dbfile D:\MCU_Project\MCU_AVR\AVR_GY-29\I2C.h
.dbfunc e I2C_Write _I2C_Write fc
; Wdata -> R18
; RegAddress -> R16
.even
_I2C_Write::
.dbline -1
.dbline 41
; #include <macros.h>
; #include "delay.h"
;
; //使用AVR内部硬件iic，引脚定义
; //PC0->SCL ; PC1->SDA
; //I2C 状态定义
; //MT 主方式传输 MR 主方式接受
; #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
;
; #define RD_DEVICE_ADDR 0xA7 //定义器件在IIC总线中的从地址,根据ALT ADDRESS地址引脚不同修改
; #define WD_DEVICE_ADDR 0xA6 //ALT ADDRESS引脚接地时地址为0xA6，接电源时地址为0x3A
;
; //常用TWI操作(主模式写和读)
; #define Start() (TWCR=(1<<TWINT)|(1<<TWSTA)|(1<<TWEN)) //启动I2C
; #define Stop() (TWCR=(1<<TWINT)|(1<<TWSTO)|(1<<TWEN)) //停止I2C
; #define Wait() {while(!(TWCR&(1<<TWINT)));} //等待中断发生
; #define TestAck() (TWSR&0xf8) //观察返回状态
; #define SetAck (TWCR|=(1<<TWEA)) //做出ACK应答
; #define SetNoAck (TWCR&=~(1<<TWEA)) //做出Not Ack应答
; #define Twi() (TWCR=(1<<TWINT)|(1<<TWEN)) //启动I2C
; #define Write8Bit(x) {TWDR=(x);TWCR=(1<<TWINT)|(1<<TWEN);} //写数据到TWDR
;
; unsigned char I2C_Write(unsigned char RegAddress,unsigned char Wdata);
; unsigned char I2C_Read(unsigned RegAddress);
;
; /*********************************************
; I2C总线写一个字节
; 返回0:写成功
; 返回1:写失败
; **********************************************/
; unsigned char I2C_Write(unsigned char RegAddress,unsigned char Wdata)
; {
.dbline 42
; Start(); //I2C启动
ldi R24,164
out 0x36,R24
.dbline 43
; Wait();
L18:
.dbline 43
L19:
.dbline 43
in R2,0x36
sbrs R2,7
rjmp L18
X3:
.dbline 43
.dbline 43
.dbline 44
; if(TestAck()!=START)
in R24,0x1
andi R24,248
cpi R24,8
breq L21
X4:
.dbline 45
; return 1; //ACK
ldi R16,1
xjmp L17
L21:
.dbline 47
;
; Write8Bit(WD_DEVICE_ADDR); //写I2C从器件地址和写方式
.dbline 47
ldi R24,166
out 0x3,R24
.dbline 47
ldi R24,132
out 0x36,R24
.dbline 47
.dbline 47
.dbline 48
; Wait();
L23:
.dbline 48
L24:
.dbline 48
in R2,0x36
sbrs R2,7
rjmp L23
X5:
.dbline 48
.dbline 48
.dbline 49
; if(TestAck()!=MT_SLA_ACK)
in R24,0x1
andi R24,248
cpi R24,24
breq L26
X6:
.dbline 50
; return 1; //ACK
ldi R16,1
xjmp L17
L26:
.dbline 52
;
; Write8Bit(RegAddress); //写器件相应寄存器地址
.dbline 52
out 0x3,R16
.dbline 52
ldi R24,132
out 0x36,R24
.dbline 52
.dbline 52
.dbline 53
; Wait();
L28:
.dbline 53
L29:
.dbline 53
in R2,0x36
sbrs R2,7
rjmp L28
X7:
.dbline 53
.dbline 53
.dbline 54
; if(TestAck()!=MT_DATA_ACK)
in R24,0x1
andi R24,248
cpi R24,40
breq L31
X8:
.dbline 55
; return 1; //ACK
ldi R16,1
xjmp L17
L31:
.dbline 57
;
; Write8Bit(Wdata); //写数据到器件相应寄存器
.dbline 57
out 0x3,R18
.dbline 57
ldi R24,132
out 0x36,R24
.dbline 57
.dbline 57
.dbline 58
; Wait();
L33:
.dbline 58
L34:
.dbline 58
in R2,0x36
sbrs R2,7
rjmp L33
X9:
.dbline 58
.dbline 58
.dbline 59
; if(TestAck()!=MT_DATA_ACK)
in R24,0x1
andi R24,248
cpi R24,40
breq L36
X10:
.dbline 60
; return 1; //ACK
ldi R16,1
xjmp L17
L36:
.dbline 61
; Stop(); //I2C停止
ldi R24,148
out 0x36,R24
.dbline 63
; //delay_nms(10); //延时
; return 0;
clr R16
.dbline -2
L17:
.dbline 0 ; func end
ret
.dbsym r Wdata 18 c
.dbsym r RegAddress 16 c
.dbend
.dbfunc e I2C_Read _I2C_Read fc
; temp -> R10
; RegAddress -> R16,R17
.even
_I2C_Read::
st -y,R10
.dbline -1
.dbline 74
; }
;
; /*********************************************
; I2C总线读一个字节
; 返回0:读成功
; 返回1:读失败
; **********************************************/
;
; unsigned char I2C_Read(unsigned RegAddress)
;
; {
.dbline 76
; unsigned char temp;
; Start();//I2C启动
ldi R24,164
out 0x36,R24
.dbline 77
; Wait();
L39:
.dbline 77
L40:
.dbline 77
in R2,0x36
sbrs R2,7
rjmp L39
X11:
.dbline 77
.dbline 77
.dbline 78
; if (TestAck()!=START)
in R24,0x1
andi R24,248
cpi R24,8
breq L42
X12:
.dbline 79
; return 1; //ACK
ldi R16,1
xjmp L38
L42:
.dbline 81
;
; Write8Bit(WD_DEVICE_ADDR); //写I2C从器件地址和写方式
.dbline 81
ldi R24,166
out 0x3,R24
.dbline 81
ldi R24,132
out 0x36,R24
.dbline 81
.dbline 81
.dbline 82
; Wait();
L44:
.dbline 82
L45:
.dbline 82
in R2,0x36
sbrs R2,7
rjmp L44
X13:
.dbline 82
.dbline 82
.dbline 83
; if (TestAck()!=MT_SLA_ACK)
in R24,0x1
andi R24,248
cpi R24,24
breq L47
X14:
.dbline 84
; return 1; //ACK
ldi R16,1
xjmp L38
L47:
.dbline 86
;
; Write8Bit(RegAddress); //写器件相应寄存器地址
.dbline 86
out 0x3,R16
.dbline 86
ldi R24,132
out 0x36,R24
.dbline 86
.dbline 86
.dbline 87
; Wait();
L49:
.dbline 87
L50:
.dbline 87
in R2,0x36
sbrs R2,7
rjmp L49
X15:
.dbline 87
.dbline 87
.dbline 88
; if (TestAck()!=MT_DATA_ACK)
in R24,0x1
andi R24,248
cpi R24,40
breq L52
X16:
.dbline 89
; return 1;
ldi R16,1
xjmp L38
L52:
.dbline 91
;
; Start(); //I2C重新启动
ldi R24,164
out 0x36,R24
.dbline 92
; Wait();
L54:
.dbline 92
L55:
.dbline 92
in R2,0x36
sbrs R2,7
rjmp L54
X17:
.dbline 92
.dbline 92
.dbline 93
; if (TestAck()!=RE_START)
in R24,0x1
andi R24,248
cpi R24,16
breq L57
X18:
.dbline 94
; return 1;
ldi R16,1
xjmp L38
L57:
.dbline 96
;
; Write8Bit(RD_DEVICE_ADDR); //写I2C从器件地址和读方式
.dbline 96
ldi R24,167
out 0x3,R24
.dbline 96
ldi R24,132
out 0x36,R24
.dbline 96
.dbline 96
.dbline 97
; Wait();
L59:
.dbline 97
L60:
.dbline 97
in R2,0x36
sbrs R2,7
rjmp L59
X19:
.dbline 97
.dbline 97
.dbline 98
; if(TestAck()!=MR_SLA_ACK)
in R24,0x1
andi R24,248
cpi R24,64
breq L62
X20:
.dbline 99
; return 1; //ACK
ldi R16,1
xjmp L38
L62:
.dbline 101
;
; Twi(); //启动主I2C读方式
ldi R24,132
out 0x36,R24
.dbline 102
; Wait();
L64:
.dbline 102
L65:
.dbline 102
in R2,0x36
sbrs R2,7
rjmp L64
X21:
.dbline 102
.dbline 102
.dbline 103
; if(TestAck()!=MR_DATA_NOACK)
in R24,0x1
andi R24,248
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -