led.s

一个关于AVR单片机的例程

	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L37
	movw R30,R28
	ldd R2,z+0
	ldd R3,z+1
	ldd R4,z+2
	ldd R5,z+3
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L38
L37:
	movw R30,R28
	ldd R16,z+0
	ldd R17,z+1
	ldd R18,z+2
	ldd R19,z+3
	xcall fp2int
	movw R10,R16
L38:
	mov R20,R10
	.dbline 153
;   display_one(3,temp);
	mov R18,R20
	ldi R16,3
	xcall _display_one
	.dbline 154
;   led_port |= 0x80; //点亮对应小数点
	sbi 0x1b,7
	.dbline 155
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 156
;   led_contrl_port &=~ (1<<3);
	cbi 0x18,3
	.dbline 158
;   //第一位小数
;   temp2=(data*10);
	ldi R16,<L28
	ldi R17,>L28
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	movw R30,R28
 ; stack offset 4
	ldd R2,z+26
	ldd R3,z+27
	ldd R4,z+28
	ldd R5,z+29
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	xcall empy32f
	movw R30,R28
	std z+4,R16
	std z+5,R17
	std z+6,R18
	std z+7,R19
	movw R30,R28
	ldd R2,z+4
	ldd R3,z+5
	ldd R4,z+6
	ldd R5,z+7
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L39
	movw R30,R28
	ldd R2,z+4
	ldd R3,z+5
	ldd R4,z+6
	ldd R5,z+7
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L40
L39:
	movw R30,R28
	ldd R16,z+4
	ldd R17,z+5
	ldd R18,z+6
	ldd R19,z+7
	xcall fp2int
	movw R10,R16
L40:
	movw R22,R10
	.dbline 159
;   temp=temp2%10; // 1.234*10%10 = 2
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 160
;   display_one(2,temp);
	mov R18,R20
	ldi R16,2
	xcall _display_one
	.dbline 161
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 162
;   led_contrl_port &=~ (1<<2);
	cbi 0x18,2
	.dbline 164
;   //第二位小数
;   temp2=(data*100);
	ldi R16,<L32
	ldi R17,>L32
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	movw R30,R28
 ; stack offset 4
	ldd R2,z+26
	ldd R3,z+27
	ldd R4,z+28
	ldd R5,z+29
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	xcall empy32f
	movw R30,R28
	std z+8,R16
	std z+9,R17
	std z+10,R18
	std z+11,R19
	movw R30,R28
	ldd R2,z+8
	ldd R3,z+9
	ldd R4,z+10
	ldd R5,z+11
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L41
	movw R30,R28
	ldd R2,z+8
	ldd R3,z+9
	ldd R4,z+10
	ldd R5,z+11
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L42
L41:
	movw R30,R28
	ldd R16,z+8
	ldd R17,z+9
	ldd R18,z+10
	ldd R19,z+11
	xcall fp2int
	movw R10,R16
L42:
	movw R22,R10
	.dbline 165
;   temp=temp2%10; // 1.234*100%10 = 3
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 166
;   display_one(1,temp);
	mov R18,R20
	ldi R16,1
	xcall _display_one
	.dbline 167
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 168
;   led_contrl_port &=~ (1<<1);
	cbi 0x18,1
	.dbline 170
;   //第三位小数
;   temp2=(data*1000);
	ldi R16,<L19
	ldi R17,>L19
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	movw R30,R28
 ; stack offset 4
	ldd R2,z+26
	ldd R3,z+27
	ldd R4,z+28
	ldd R5,z+29
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	xcall empy32f
	movw R30,R28
	std z+12,R16
	std z+13,R17
	std z+14,R18
	std z+15,R19
	movw R30,R28
	ldd R2,z+12
	ldd R3,z+13
	ldd R4,z+14
	ldd R5,z+15
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L43
	movw R30,R28
	ldd R2,z+12
	ldd R3,z+13
	ldd R4,z+14
	ldd R5,z+15
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L44
L43:
	movw R30,R28
	ldd R16,z+12
	ldd R17,z+13
	ldd R18,z+14
	ldd R19,z+15
	xcall fp2int
	movw R10,R16
L44:
	movw R22,R10
	.dbline 171
;   temp=temp2%10; // 1.234*1000%10 = 4
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 172
;   display_one(0,temp);
	mov R18,R20
	clr R16
	xcall _display_one
	.dbline 173
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 174
;   led_contrl_port &=~ (1<<0);
	cbi 0x18,0
	.dbline 175
;  }
	xjmp L36
L35:
	.dbline 176
;  else if(data<100)   // 例如12.34
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L32
	ldi R17,>L32
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt X2
	xjmp L45
X2:
	.dbline 177
;  {
	.dbline 178
;   temp2=data;
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L47
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L48
L47:
	movw R30,R28
	ldd R16,z+22
	ldd R17,z+23
	ldd R18,z+24
	ldd R19,z+25
	xcall fp2int
	movw R10,R16
L48:
	movw R22,R10
	.dbline 179
;   temp=(temp2/10);   // 12.34/10=1
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall div16u
	mov R20,R16
	.dbline 180
;   display_one(3,temp);
	mov R18,R20
	ldi R16,3
	xcall _display_one
	.dbline 181
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 182
;   led_contrl_port &=~ (1<<3);
	cbi 0x18,3
	.dbline 184
;   
;   temp2=data;
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L49
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L50
L49:
	movw R30,R28
	ldd R16,z+22
	ldd R17,z+23
	ldd R18,z+24
	ldd R19,z+25
	xcall fp2int
	movw R10,R16
L50:
	movw R22,R10
	.dbline 185
;   temp=(temp2%10);   // 12.34%10=2
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 186
;   display_one(2,temp);
	mov R18,R20
	ldi R16,2
	xcall _display_one
	.dbline 187
;   led_port |= 0x80; //点亮对应小数点
	sbi 0x1b,7
	.dbline 188
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 189
;   led_contrl_port &=~ (1<<2);
	cbi 0x18,2
	.dbline 191
;   
;   temp2=(data*10);
	ldi R16,<L28
	ldi R17,>L28
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	movw R30,R28
 ; stack offset 4
	ldd R2,z+26
	ldd R3,z+27
	ldd R4,z+28
	ldd R5,z+29
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	xcall empy32f
	movw R30,R28
	std z+0,R16
	std z+1,R17
	std z+2,R18
	std z+3,R19
	movw R30,R28
	ldd R2,z+0
	ldd R3,z+1
	ldd R4,z+2
	ldd R5,z+3
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L51
	movw R30,R28
	ldd R2,z+0
	ldd R3,z+1
	ldd R4,z+2
	ldd R5,z+3
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L52
L51:
	movw R30,R28
	ldd R16,z+0
	ldd R17,z+1
	ldd R18,z+2
	ldd R19,z+3
	xcall fp2int
	movw R10,R16
L52:
	movw R22,R10
	.dbline 192
;   temp=temp2%10; // 12.34*10%10=3
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 193
;   display_one(1,temp);
	mov R18,R20
	ldi R16,1
	xcall _display_one
	.dbline 194
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 195
;   led_contrl_port &=~ (1<<1);
	cbi 0x18,1
	.dbline 197
;   
;   temp2=(data*100);
	ldi R16,<L32
	ldi R17,>L32
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	movw R30,R28
 ; stack offset 4
	ldd R2,z+26
	ldd R3,z+27
	ldd R4,z+28
	ldd R5,z+29
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	xcall empy32f
	movw R30,R28
	std z+4,R16
	std z+5,R17
	std z+6,R18
	std z+7,R19
	movw R30,R28
	ldd R2,z+4
	ldd R3,z+5
	ldd R4,z+6
	ldd R5,z+7
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L53
	movw R30,R28
	ldd R2,z+4
	ldd R3,z+5
	ldd R4,z+6
	ldd R5,z+7
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L54
L53:
	movw R30,R28
	ldd R16,z+4
	ldd R17,z+5
	ldd R18,z+6
	ldd R19,z+7
	xcall fp2int
	movw R10,R16
L54:
	movw R22,R10
	.dbline 198
;   temp=temp2%10;// 12.34*100%10=4
	ldi R18,10
	ldi R19,0
	movw R16,R22
	xcall mod16u
	mov R20,R16
	.dbline 199
;   display_one(0,temp);
	mov R18,R20
	clr R16
	xcall _display_one
	.dbline 200
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 201
;   led_contrl_port &=~ (1<<0);
	cbi 0x18,0
	.dbline 202
;  }
	xjmp L46
L45:
	.dbline 203
;  else if(data<1000)  //比如123.4
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L19
	ldi R17,>L19
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt X3
	xjmp L55
X3:
	.dbline 204
;  {
	.dbline 205
;   temp2=data;
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall cmp32f
	brlt L57
	movw R30,R28
	ldd R2,z+22
	ldd R3,z+23
	ldd R4,z+24
	ldd R5,z+25
	st -y,R5
	st -y,R4
	st -y,R3
	st -y,R2
	ldi R16,<L29
	ldi R17,>L29
	xcall lpm32
	st -y,R19
	st -y,R18
	st -y,R17
	st -y,R16
	xcall sub32f
	xcall fp2int
	movw R24,R16
	subi R24,0  ; offset = 32768
	sbci R25,128
	movw R10,R24
	xjmp L58
L57:
	movw R30,R28
	ldd R16,z+22
	ldd R17,z+23
	ldd R18,z+24
	ldd R19,z+25
	xcall fp2int
	movw R10,R16
L58:
	movw R22,R10
	.dbline 206
;   temp=(temp2/100);// 123.4/100=1
	ldi R18,100
	ldi R19,0
	movw R16,R22
	xcall div16u
	mov R20,R16
	.dbline 207
;   display_one(3,temp);
	mov R18,R20
	ldi R16,3
	xcall _display_one
	.dbline 208
;   delay_ms(6);
	ldi R16,6
	ldi R17,0
	xcall _delay_ms
	.dbline 209
;   led_contrl_port &=~ (1<<3);
	cbi 0x18,3
	.dbline 211
;