📄 read_page.lst
字号:
__start:
__text_start:
46 EFCF LDI R28,0xFF
47 E1D0 LDI R29,0x10
48 BFCD OUT 0x3D,R28
49 BFDE OUT 0x3E,R29
4A 51CE SUBI R28,0x1E
4B 40D0 SBCI R29,0
4C EA0A LDI R16,0xAA
4D 8308 STD Y+0,R16
4E 2400 CLR R0
4F E0E0 LDI R30,0
50 E0F1 LDI R31,1
51 E011 LDI R17,1
52 31E0 CPI R30,0x10
53 07F1 CPC R31,R17
54 F011 BEQ 0x0057
55 9201 ST R0,Z+
56 CFFB RJMP 0x0052
57 8300 STD Z+0,R16
58 E8EC LDI R30,0x8C
59 E0F0 LDI R31,0
5A E0A0 LDI R26,0
5B E0B1 LDI R27,1
5C E010 LDI R17,0
5D E000 LDI R16,0
5E BF0B OUT 0x3B,R16
5F 38EC CPI R30,0x8C
60 07F1 CPC R31,R17
61 F021 BEQ 0x0066
62 95C8 LPM
63 9631 ADIW R30,1
64 920D ST R0,X+
65 CFF9 RJMP 0x005F
66 940E 0109 CALL _main
_exit:
68 CFFF RJMP _exit
FILE: E:\产品\开发板\mega128-board\实验程序\I2C读写24C04\连续读\i2c.h
(0001) ///////////////////////i2c通信子程序///////////////////////
(0002) ///////////////////////////////////////////////////////////
(0003) //初始化
(0004) void i2c_init()
(0005) {
(0006) PORTD&=~0x80;
_i2c_init:
69 9897 CBI 0x12,7
(0007) TWBR=0x01 ; //速率=16M/(16+2*16)=33.3k
6A E081 LDI R24,1
6B 9380 0070 STS 0x0070,R24
(0008) TWSR=0x01 ; //分频因子=4
6D 9380 0071 STS 0x0071,R24
6F 9508 RET
(0009) }
(0010)
(0011)
(0012) //开始信号
(0013) void i2c_start()
(0014) {
(0015) TWCR=0xa4 ;
_i2c_start:
70 EA84 LDI R24,0xA4
71 9380 0074 STS 0x0074,R24
(0016) while(!(TWCR&0x80));
73 9020 0074 LDS R2,0x0074
75 FE27 SBRS R2,7
76 CFFC RJMP 0x0073
77 9508 RET
(0017) }
(0018)
(0019)
(0020) //写数据
(0021) void i2c_wrdata(uchar i2c_data)
(0022) {
(0023) TWDR=(i2c_data);
_i2c_wrdata:
i2c_data --> R16
78 9300 0073 STS 0x0073,R16
(0024) TWCR=0x84 ;
7A E884 LDI R24,0x84
7B 9380 0074 STS 0x0074,R24
(0025) while(!(TWCR&0x80));
7D 9020 0074 LDS R2,0x0074
7F FE27 SBRS R2,7
80 CFFC RJMP 0x007D
81 9508 RET
(0026) }
(0027)
(0028)
(0029) //读数据noack
(0030) uchar i2c_redata()
(0031) {
(0032) uchar i2c_data ;
(0033) TWCR=0x84 ;
_i2c_redata:
i2c_data --> R16
82 E884 LDI R24,0x84
83 9380 0074 STS 0x0074,R24
(0034) while(!(TWCR&0x80));
85 9020 0074 LDS R2,0x0074
87 FE27 SBRS R2,7
88 CFFC RJMP 0x0085
(0035) i2c_data=TWDR ;
89 9100 0073 LDS R16,0x0073
(0036) return(i2c_data);
8B 9508 RET
(0037) }
(0038)
(0039) //读数据ack
(0040) uchar i2c_redataack()
(0041) {
(0042) uchar i2c_data ;
(0043) TWCR=0xc4 ;
_i2c_redataack:
i2c_data --> R16
8C EC84 LDI R24,0xC4
8D 9380 0074 STS 0x0074,R24
(0044) while(!(TWCR&0x80));
8F 9020 0074 LDS R2,0x0074
91 FE27 SBRS R2,7
92 CFFC RJMP 0x008F
(0045) i2c_data=TWDR ;
93 9100 0073 LDS R16,0x0073
(0046) return(i2c_data);
95 9508 RET
(0047) }
(0048)
(0049)
(0050)
(0051) //停止信号
(0052) void i2c_stop()
(0053) {
(0054) TWCR=0x94 ;
_i2c_stop:
96 E984 LDI R24,0x94
97 9380 0074 STS 0x0074,R24
99 9508 RET
_i2c_wrbyte:
i2c_add --> R12
i2c_data --> R10
9A 92AA ST R10,-Y
9B 92CA ST R12,-Y
9C 2EC2 MOV R12,R18
9D 2EA0 MOV R10,R16
(0055) }
(0056)
(0057) //i2c的写字节子程序
(0058) void i2c_wrbyte(uchar i2c_data,uchar i2c_add)
(0059) {
(0060) do
(0061) {
(0062) i2c_start();
9E DFD1 RCALL _i2c_start
(0063) i2c_wrdata(0xa0);
9F EA00 LDI R16,0xA0
A0 DFD7 RCALL _i2c_wrdata
(0064) }
(0065) while((TWSR&0xf8)!=0x18); //判断总线是否可以操作
A1 9180 0071 LDS R24,0x0071
A3 7F88 ANDI R24,0xF8
A4 3188 CPI R24,0x18
A5 F7C1 BNE 0x009E
(0066)
(0067) i2c_wrdata(i2c_add);
A6 2D0C MOV R16,R12
A7 DFD0 RCALL _i2c_wrdata
(0068) i2c_wrdata(i2c_data);
A8 2D0A MOV R16,R10
A9 DFCE RCALL _i2c_wrdata
(0069) i2c_stop();
AA DFEB RCALL _i2c_stop
AB 90C9 LD R12,Y+
AC 90A9 LD R10,Y+
AD 9508 RET
_i2c_wrpage:
i --> R10
i2c_nub --> Y,+4
i2c_add --> R10
i2c_data --> R12
AE 940E 0153 CALL push_xgset003C
B0 2EA2 MOV R10,R18
B1 0168 MOVW R12,R16
(0070) }
(0071)
(0072) //i2c的页写子程序
(0073) //参数1：要写入的数组指针
(0074) //参数2：写入的首地址
(0075) //参数3：数组的单元数
(0076) void i2c_wrpage(uchar *i2c_data,uchar i2c_add,uchar i2c_nub)
(0077) {
(0078) uchar i;
(0079) do
(0080) {
(0081) i2c_start();
B2 DFBD RCALL _i2c_start
(0082) i2c_wrdata(0xa0);
B3 EA00 LDI R16,0xA0
B4 DFC3 RCALL _i2c_wrdata
(0083) }
(0084) while((TWSR&0xf8)!=0x18);
B5 9180 0071 LDS R24,0x0071
B7 7F88 ANDI R24,0xF8
B8 3188 CPI R24,0x18
B9 F7C1 BNE 0x00B2
(0085) //判断总线是否可以操作
(0086) i2c_wrdata(i2c_add);
BA 2D0A MOV R16,R10
BB DFBC RCALL _i2c_wrdata
(0087) for(i=0;i<i2c_nub;i++)
BC 24AA CLR R10
BD C005 RJMP 0x00C3
(0088) {
(0089) i2c_wrdata(*i2c_data++);
BE 01F6 MOVW R30,R12
BF 9101 LD R16,Z+
C0 016F MOVW R12,R30
C1 DFB6 RCALL _i2c_wrdata
C2 94A3 INC R10
C3 800C LDD R0,Y+4
C4 14A0 CP R10,R0
C5 F3C0 BCS 0x00BE
(0090) }
(0091) i2c_stop();
C6 DFCF RCALL _i2c_stop
C7 940C 0148 JMP pop_xgset003C
_i2c_rebyte:
i2c_data --> R10
i2c_add --> R10
C9 92AA ST R10,-Y
CA 2EA0 MOV R10,R16
(0092) }
(0093)
(0094) //i2c读一个字节子程序
(0095) uchar i2c_rebyte(uchar i2c_add)
(0096) {
(0097) uchar i2c_data ;
(0098) do
(0099) {
(0100) i2c_start();
CB DFA4 RCALL _i2c_start
(0101) i2c_wrdata(0xa0);
CC EA00 LDI R16,0xA0
CD DFAA RCALL _i2c_wrdata
(0102) }
(0103) while((TWSR&0xf8)!=0x18);
CE 9180 0071 LDS R24,0x0071
D0 7F88 ANDI R24,0xF8
D1 3188 CPI R24,0x18
D2 F7C1 BNE 0x00CB
(0104) //判断总线是否可以操作
(0105) i2c_wrdata(i2c_add);
D3 2D0A MOV R16,R10
D4 DFA3 RCALL _i2c_wrdata
(0106) i2c_start();
D5 DF9A RCALL _i2c_start
(0107) i2c_wrdata(0xa1);
D6 EA01 LDI R16,0xA1
D7 DFA0 RCALL _i2c_wrdata
(0108) i2c_data=i2c_redata();
D8 DFA9 RCALL _i2c_redata
D9 2EA0 MOV R10,R16
(0109) i2c_stop();
DA DFBB RCALL _i2c_stop
(0110) return(i2c_data);
DB 2D0A MOV R16,R10
DC 90A9 LD R10,Y+
DD 9508 RET
_i2c_rese:
i --> R10
i2c_nub --> Y,+4
i2c_add --> R10
i2c_data --> R20
DE 940E 0158 CALL push_xgset300C
E0 2EA2 MOV R10,R18
E1 01A8 MOVW R20,R16
(0111) }
(0112)
(0113)
(0114) //i2c连续读子程序
(0115) //参数1：16位地址
(0116) //参数2：读取字节数 注：<=64
(0117) //读出的数据只能从全局数组变量获得
(0118) void i2c_rese(uchar *i2c_data,uchar i2c_add,uchar i2c_nub)
(0119) {
(0120) uchar i;
(0121) do
(0122) {
(0123) i2c_start();
E2 DF8D RCALL _i2c_start
(0124) i2c_wrdata(0xa0);
E3 EA00 LDI R16,0xA0
E4 DF93 RCALL _i2c_wrdata
(0125) }
(0126) while((TWSR&0xf8)!=0x18);
E5 9180 0071 LDS R24,0x0071
E7 7F88 ANDI R24,0xF8
E8 3188 CPI R24,0x18
E9 F7C1 BNE 0x00E2
(0127) //判断总线是否可以操作
(0128) i2c_wrdata(i2c_add);
EA 2D0A MOV R16,R10
EB DF8C RCALL _i2c_wrdata
(0129) i2c_start();
EC DF83 RCALL _i2c_start
(0130) i2c_wrdata(0xa1);
ED EA01 LDI R16,0xA1
EE DF89 RCALL _i2c_wrdata
(0131) for(i=0;i<(i2c_nub-1);i++) //少循环一次，留给最后发出no ack信号
EF 24AA CLR R10
F0 C006 RJMP 0x00F7
(0132) {
(0133) *i2c_data=i2c_redataack();
F1 DF9A RCALL _i2c_redataack
F2 01FA MOVW R30,R20
F3 8300 STD Z+0,R16
(0134) i2c_data++;
F4 5F4F SUBI R20,0xFF
F5 4F5F SBCI R21,0xFF
F6 94A3 INC R10
F7 818C LDD R24,Y+4
F8 5081 SUBI R24,1
F9 16A8 CP R10,R24
FA F3B0 BCS 0x00F1
(0135) }
(0136) *i2c_data=i2c_redata(); //最后一个字节发出no ack信号
FB DF86 RCALL _i2c_redata
FC 01FA MOVW R30,R20
FD 8300 STD Z+0,R16
(0137) i2c_stop();
FE DF97 RCALL _i2c_stop
FF 940C 015D JMP pop_xgset300C
FILE: E:\产品\开发板\mega128-board\实验程序\I2C读写24C04\连续读\read_page.c
(0001) #include<iom128v.h>
(0002) #define uchar unsigned char
(0003) #define uint unsigned int
(0004) #include"i2c.h"
(0005) uchar aa[16];
(0006)
(0007) //短延时函数
(0008) void s_ms(unsigned int t)
(0009) {
(0010) unsigned int i ;
(0011) for(;t>=1;t--)
_s_ms:
i --> Y,+1
t --> R16
101 C002 RJMP 0x0104
102 5001 SUBI R16,1
103 4010 SBCI R17,0
104 3001 CPI R16,1
105 E0E0 LDI R30,0
106 071E CPC R17,R30
107 F7D0 BCC 0x0102
108 9508 RET
_main:
i --> R20
109 9721 SBIW R28,1
(0012) {
(0013) }
(0014) }
(0015)
(0016) //写一个字节
(0017) main()
(0018) {
(0019) uchar i;
(0020) DDRA=0xff;
10A EF8F LDI R24,0xFF
10B BB8A OUT 0x1A,R24
(0021) PORTA=0XFF;
10C BB8B OUT 0x1B,R24
(0022) i2c_init(); //初始化
10D DF5B RCALL _i2c_init
(0023) i2c_rese(aa,0x00,16);
10E E180 LDI R24,0x10
10F 8388 STD Y+0,R24
110 2722 CLR R18
111 E000 LDI R16,0
112 E011 LDI R17,1
113 DFCA RCALL _i2c_rese
(0024) for(i=0;i<16;i++)
114 2744 CLR R20
115 C02E RJMP 0x0144
(0025) {
(0026) PORTA=~aa[i];
116 E080 LDI R24,0
117 E091 LDI R25,1
118 2FE4 MOV R30,R20
119 27FF CLR R31
11A 0FE8 ADD R30,R24
11B 1FF9 ADC R31,R25
11C 8020 LDD R2,Z+0
11D 9420 COM R2
11E BA2B OUT 0x1B,R2
(0027) s_ms(60000);
11F E600 LDI R16,0x60
120 EE1A LDI R17,0xEA
121 DFDF RCALL _s_ms
(0028) s_ms(60000);
122 E600 LDI R16,0x60
123 EE1A LDI R17,0xEA
124 DFDC RCALL _s_ms
(0029) s_ms(60000);
125 E600 LDI R16,0x60
126 EE1A LDI R17,0xEA
127 DFD9 RCALL _s_ms
(0030) s_ms(60000);
128 E600 LDI R16,0x60
129 EE1A LDI R17,0xEA
12A DFD6 RCALL _s_ms
(0031) s_ms(60000);
12B E600 LDI R16,0x60
12C EE1A LDI R17,0xEA
12D DFD3 RCALL _s_ms
(0032) s_ms(60000);
12E E600 LDI R16,0x60
12F EE1A LDI R17,0xEA
130 DFD0 RCALL _s_ms
(0033) s_ms(60000);
131 E600 LDI R16,0x60
132 EE1A LDI R17,0xEA
133 DFCD RCALL _s_ms
(0034) s_ms(60000);
134 E600 LDI R16,0x60
135 EE1A LDI R17,0xEA
136 DFCA RCALL _s_ms
(0035) s_ms(60000);
137 E600 LDI R16,0x60
138 EE1A LDI R17,0xEA
139 DFC7 RCALL _s_ms
(0036) s_ms(60000);
13A E600 LDI R16,0x60
13B EE1A LDI R17,0xEA
13C DFC4 RCALL _s_ms
(0037) s_ms(60000);
13D E600 LDI R16,0x60
13E EE1A LDI R17,0xEA
13F DFC1 RCALL _s_ms
(0038) s_ms(60000);
FILE: <library>
140 E600 LDI R16,0x60
141 EE1A LDI R17,0xEA
142 DFBE RCALL _s_ms
143 9543 INC R20
144 3140 CPI R20,0x10
145 F280 BCS 0x0116
146 9621 ADIW R28,1
147 9508 RET
pop_xgset003C:
148 90A9 LD R10,Y+
149 90B9 LD R11,Y+
14A 90C9 LD R12,Y+
14B 90D9 LD R13,Y+
14C 9508 RET
push_xgsetF0FC:
14D 937A ST R23,-Y
14E 936A ST R22,-Y
push_xgset30FC:
14F 935A ST R21,-Y
150 934A ST R20,-Y
push_xgset00FC:
151 92FA ST R15,-Y
152 92EA ST R14,-Y
push_xgset003C:
153 92DA ST R13,-Y
154 92CA ST R12,-Y
155 92BA ST R11,-Y
156 92AA ST R10,-Y
157 9508 RET
push_xgset300C:
158 935A ST R21,-Y
159 934A ST R20,-Y
15A 92BA ST R11,-Y
15B 92AA ST R10,-Y
15C 9508 RET
pop_xgset300C:
15D 90A9 LD R10,Y+
15E 90B9 LD R11,Y+
15F 9149 LD R20,Y+
160 9159 LD R21,Y+
161 9508 RET
⌨️ 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 + -