.


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:



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( , )

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FAQ

DS1307

⇐ 123456



:

− , , , , , 2100 .;

− 56 ;

− TWI (I2C);

− ;

− ;

− 500 A 25 C;

− -40 C +85 C.

. 7.6.

. 7.6. DS1307

 

DS1307 8- DIP. DS1307 . 7.6.

TWI . 7- 1101000.

. 7.7.

. 7 0 . 0 7- 0.

7.6

DS1307

VCC  
X1, X2 1, 2 32,768
VBAT   (+3 )
GND  
SDA   -
SCL  
SQW/OUT   /

 

7.7

7 6 5 4 3 2 1 0
0x0 CH 0059
0x1   0059
0x2   12 24 PM/AM 112 + AM/PM 023
0x3           0107
0x4     0131
0x5   - - 0112
0x6 0099
0x7 OUT     SQWE     RS1 RS0 -
0x8 0x3F - - - - - - - - 568 0x00xFF

 


 

7.6.

 

. 2. S1S12, . VT1, VT3, VT5 VT7, Q0Q3 DD3 HC138. PC.0PC.2. PC.5PC.7. PF.0PF.3, PE.2, PD.5 PD.7 , I2C PD.0, PD.1.

 

 

7.7.

 

1. TWI (I2C)?

2. , TWI?

3. ?

4. TWI .

5. TWI ?

6. .

7. DS1307?

8. DS1307?

9. TWI.

 

7.8.

 

31.100, :

1. .

2. , ( ).

3. , .

4. , 1.

5. , 1. .

6. , 10 1.

7. , 6 .

8. , 8 !.

9. .

10. .

11. , 6 1.

12. , 8 1.

13. 15 .

14. 15 .

15. . .

 

7.9.

 

.

.include "m128def.inc"

.cseg

.org 0000

jmp Init

Init: ;

ldi R16,0x00 ; , 0400

out SPL,R16

ldi R17,0x04

out SPH,R17

sbi DDRD,5; R/W

sbi DDRD,7; RS

sbi DDRE,2; E

ldi R16,0b00001111; DB7..DB4

sts DDRF,R16

cbi PortD,5; R/W = 0 (Write)

;

ldi R17,0

dec R17

brne PC-1

dec R18

brne PC-3

cbi PortD,7 ;RS = 0

ldi R16,0b0011

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

dec R17

brne PC-1

dec R18

brne PC-3

ldi R16,0b0011

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

dec R17

brne PC-1

ldi R16,0b0011

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b0010 ;4-

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b0010 ; 4-

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b1000 ;N = 1, F = 0 (. 57 )

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0b0000

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b1000 ;D = 0, C = 0, B = 0

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0b0000

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b0110;I/D = 1, S = 0

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0b0000

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

ldi R16,0b1111;D = 1, C = 1, B = 1

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

; TWI

clr r21

clr r22

clr r23

clr r25

;-

clr r17

clr r18

clr r19

; :

clr r16

; 2

ldi r25,5 ;

sts TWBR,r25

; .

ldi r25,(0<<TWPS1)|(0<<TWPS0)

; , 1

sts TWSR,r25

;

;

ldi r26,0x00

ldi r27,0x03

;

ldi r28,0x00

ldi r29,0x03

;

ldi r16,0x00

st x+,r16

andi r26,7

brne pc-3

clr r30

clr r31

rcall DS_Start ;

start:

; 0x80

cbi PortD,7 ;RS = 0

ldi R16,0x8 ;

sts PortF,R16 ;

sbi PortE,2 ;

call delay ;

cbi PortE,2 ;

ldi R16,0x0 ;

sts PortF,R16 ;

sbi PortE,2 ;

call delay ;

cbi PortE,2 ;

; "" 0x42

ldi r16,0x42

call lcd_print_symbol

; "" 0x70

ldi r16,70

call lcd_print_symbol

; "" 0x65

ldi r16,0x65

call lcd_print_symbol

; "" 0xBC

ldi r16,0xBC

call lcd_print_symbol

; "" 0xC7

ldi r16,0xC7

call lcd_print_symbol

; " " 0x20

ldi r16,0x20

call lcd_print_symbol

; " " 0x20

ldi r16,0x20

call lcd_print_symbol

rcallDS_get_time ;

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r23

andi r16,0xf0

swap r16

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r23

andi r16,0x0f

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

; ":" 0x3A

ldi r16,0x3A

call lcd_print_symbol

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r22

andi r16,0xf0

swap r16

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r22

andi r16,0x0f

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

; ":" 0x3A

ldi r16,0x3A

call lcd_print_symbol

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r21

andi r16,0xf0

swap r16

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

;

ldi R16,0x3

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

mov r16,r21

andi r16,0x0f

sts PortF,R16

sbi PortE,2

call delay

cbi PortE,2

; " " 0x20

ldi r16,0x20

call lcd_print_symbol

jmpstart ;

DS_Start: ;

call i2c_start ;

ldi r25,0b11010000 ;

call i2c_send ;

ldi r25,0x00 ;

call i2c_send ;

call i2c_start ;

ldi r25,0b11010001 ;

call i2c_send ;

call i2c_recive_last ;

cbr r25,0b10000000 ; 7-

push r25 ;

call i2c_stop ;

call i2c_start ;

ldi r25,0b11010000 ; +

call i2c_send ;

ldi r25,0 ;

call i2c_send ;

pop r25 ;

call i2c_send ;

call i2c_stop ;

ret

DS_get_time:

; DS1307

; R21, R22, R23

Call i2c_start ;

ldi r25,0b11010000 ;

call i2c_send ;

ldi r25,0x00 ;

call i2c_send ;

call i2c_start ;

ldi r25,0b11010001 ;

call i2c_send ;

call i2c_recive ;

cbr r25,0b10000000 ; 7-

mov r21,r25 ; R21

call i2c_recive ;

mov r22,r25 ; R22

rcall i2c_recive_last ;

mov r23,r25 ; R23

call i2c_stop ;

ret

i2c_stop: ;

ldi r25, (1<<TWINT)|(1<<TWEN)|(1<<TWSTO)

; , , ""

sts TWCR, r25 ; ;

ret

i2c_start: ;

ldi r25, (1<<TWINT)|(1<<TWSTA)|(1<<TWEN)

; ., "" .

sts TWCR, r25

;

wait1: ;

lds r25,TWCR

;

sbrs r25,TWINT ;,

jmp wait1 ; , wait1, ,

;

ret

i2c_recive_last: ; R25

ldi r25, (1<<TWINT|1<<TWEN)

;

sts TWCR, r25

;

wait3: ;

lds r25,TWCR ; R25

;

sbrs r25,TWINT ;,

jmp wait3 ;

lds r25,TWDR ; , R25

ret ;

i2c_recive: ; R25

ldi r25, (1<<TWINT|1<<TWEN|1<<TWEA)

; ., . ""

sts TWCR, r25 ;

;

wait4: ;

lds r25,TWCR ;

sbrs r25,TWINT ;,

jmp wait4 ;

lds r25,TWDR ; R25

;

ret ;

i2c_send: ; R25

sts TWDR,r25 ; R25

ldi r25, (1<<TWINT)|(1<<TWEN)

;

Sts TWCR, r25

;

wait2: ;

lds r25,TWCR ;

;

sbrs r25,TWINT ; ,

;

rjmp wait2 ; ,

ret

lcd_print_symbol: ;

sbi PortD,7 ;RS = 1

mov r17,r16 ; R16

andi r16,0xF0 ; R16

swap r16 ;

sts PortF,R16 ;

sbi PortE,2 ;

call delay

cbi PortE,2 ;

mov r17,r16 ; R16

andi r16,0x0F ;

;

sts PortF,R16 ;

sbi PortE,2 ;

call delay

cbi PortE,2 ;

ret ;

delay: ;

clr r17 ;

dec r17 ;

brne pc-1 ;

ret ;

;

 

: , , , .


8

SPI

 

: SPI, , DATAFLASH , .

 

 

8.1. SPI

 

SPI . SPI I2C . Motorola, . Serial Peripheral Bus, . SPI -.

SPI , / . , SPI , , , . SPI . .

SPI, . , , . 8.1. MOSI SCLK, . . MISO, . , , , . , 3 4 . , , , SS . .

 

 

. 8.1. SPI

 

SPI () (. 8.2), () (. 8.3). , . . SPI- . , , , SS , . ( 3 + n, n ). , . . . , . 8.3. , , 4. , .

 

 

. 8.2. SPI

 

SPI , , , , , . . .

 

 

. 8.3. SPI

 

SPI . 8.1.

 

8.1

SPI

MOSI DO SDO OUT MOSI DO SDO OUT
MISO DI SDI DIN MISO DI SDI DIN
SCLK DCLOCK CLK SCK SCLK DCLOCK CLK SCK
SS CS SS CS

, SPI. SPI :

1. CPOL ( CPOL = 0, , (. . , ), , CPOL = 1 (. . , ));

2. CPHA . , ( CPHA = 0, , ; CPHA = 1, , ).

, SPI, , , . SPI, , SPI , SPI- ( ). , SPI .

 

8.2. SPI ATMega

 

SPI (. 8.4) ATmega128 :

, ;

;

;

;

;

;

(Idle);

() SPI (CK/2).

SPI SS , . ( ) , SCK. MOSI , MISO, , . SPI SS ( ).

 

. 8.4. SPI

 

SPI (), SS . . SPI . SPI , (SPIF). SPIE SPCR, SPI . , SPDR, SS. . SPI , MISO , SS . SPI (SPDR), SS. , , SPIF. SPI (SPIE) SPCR (. 8.2), SPIF . SPDR . .

, . , SPI , . , SPI , . .

SPI SCK. SPI fosc/4.

 

8.2

SPI SPCR

               
SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0
/ / / / / / / / /
               

 

7 SPIE: SPI

SPIF SPSR (. 8.3) I SREG, SPI.

 

6 SPE: SPI

SPE 1, SPI. , SPI , .

 

5 DORD:

DORD = 1, . DORD = 0, .

 

4 MSTR: /

1, SPI (), (MSTR = 0) . SS , MSTR 1, MSTR SPIF SPSR. SPI MSTR.

 

3 CPOL:

1, SCK . CPOL = 0, SCK .

2 CPHA:

(CPHA) , SCK : .

 

1, 0 SPR1, SPR0: 1 0

(. 8.4) SCK . SPR1 SPR0 .

 

8.3

SPI SPSR

               
SPIF WCOL - - - - - SPI2X
/ /
               

 

8.4

SPI2X SPR1 SPR0 SCK
      fosc/4
      fosc/16
      fosc/64
      fosc/128
      fosc/2
      fosc/8
      fosc/32
      fosc/64

 

7 SPIF: SPI

SPIF . , SPIE SPCR . SS , , SPI , SPIF. SPIF . , SPIF SPI SPIF, SPI (SPDR) (. 8.5).

6 WCOL:

WCOL , SPI (SPDR) . WCOL ( SPIF) SPI WCOL, SPI.

 

51 Res:

ATmega128 0.

 

0 SPI2X: SPI

1, SPI ( SCK) , SPI , , SCK . SPI , SPI fosc/4 .

8.5

SPI SPDR

               
/ / / / / / / / /

 

SPI (R0R31) SPI. . .

 

8.3. Flash (DataFlash) AT45DB041B

 

AT45DB041B :

- 2,53,6 2,73,6 ;

- SPI;

- 20 ;

- ;

- ( );

- 2048 (264 );

- ;

- 264- SRAM, ;

- ;

- ;

- : 4 , 2 ;

- ;

- SI, SCK, CS ( ), RESET ( ) WP ( ) 5 .

. 8.5, . 8.6, . 8.6.

 

. 8.5. AT45DB041B

 

8.6

AT45DB041B

CS ( )
SCK
SI
SO
WP ( )
VCC
GND

 

4 325 376 2048 264 . , SRAM 264 . , , . EEPROM ( ) 3- Read Modify Write. DataFlash . SPI 0 3, , 20 4 .

 

 

. 8.6. AT45DB041B

 

. 2,53,6 2,73,6 , .

AT45DB041B , , . , . . 8.78.9.

8.7

68h
52h
1 54h
2 56h
57h

 

CS, 8- . , SCK SI ( ). , , . SPI0 3.

, .

8.8

1 84h
2 87h
1 83h
2 86h
1 88h
2 89h
81h
50h
1 82h
2 85h

 

8.9

1 53h
2 55h
1 60h
2 61h
1 58h
2 59h

 

. 8.10.

 


 

8.10

(HEX) .
  r r r P P P P P P P P P x x x x x x x x x x x x
  r r r P P P P P P P P P P P P B B B B B B B B B 4
  r r r P P P P P P P P P P P x x x x x x x x x x
  x x x x x x x x x x x x x x x B B B B B B B B B 1
  r r r P P P P P P P P P P P P B B B B B B B B B
  x x x x x x x x x x x x x x x B B B B B B B B B 1
 
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P B B B B B B B B B 4
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P B B B B B B B B B
  r r r P P P P P P P P P P P P x x x x x x x x x
  x x x x x x x x x x x x x x x B B B B B B B B B
  r r r P P P P P P P P P P P P B B B B B B B B B
  r r r P P P P P P P P P P P P x x x x x x x x x
  x x x x x x x x x x x x x x x B B B B B B B B B
  r r r P P P P P P P P P P P P x x x x x x x x x
  r r r P P P P P P P P P P P P x x x x x x x x x
D2 r r r P P P P P P P P P P P P B B B B B B B B B 4
D4 x x x x x x x x x x x x x x x B B B B B B B B B 1
D6 x x x x x x x x x x x x x x x B B B B B B B B B 1
D7
E8 r r r P P P P P P P P P P P P B B B B B B B B B 4

 


8.4.

 

-31.100 (. 8.7) .

 

 

. 8.7.

CS0CS7. DD4 74HC138 (15647). PB.0, PB.4 PB.5.

S1S12, . VT1, VT3, VT5 VT7, Q0Q3 DD3HC138. PC.0 PC.2, PC.5PC.7, PF.0PF.3, PE.2, PD.5 PD.7 .

 

 

8.5.

 

1. SPI.

2. SPI ?

3. SPI ATMega?

4. ?

5. AT45DB041B.

6. SPI?

7. SPI?

 

8.6.

 

31.100, :

1. FLASH- AT45DB041B , # FLASH- .

2. FLASH- AT45DB041B , * FLASH- .

3. 1- AT45DB041B , * FLASH- .

4. 1- AT45DB041B , # FLASH- .

5. 2- AT45DB041B , # FLASH- .

6. 2- AT45DB041B , * FLASH- .

7. , AT45DB041B.

8. , AT45DB041B.

9. , AT45DB041B.

10. , AT45DB041B.

11. , AT45DB041B.

12. , AT45DB041B.

13. , , AT45DB041B.

14. , , , AT45DB041B.

15. , , , AT45DB041B.

8.7.

-31.100, 100h 101h AT45DB041B.

 

.include "m128def.inc"

.cseg

.org 0000

jmp Init

Init:

;

ldi R16,0x00 ; , 0400

out SPL,R16

ldi R17,0x04

out sph,r17

jmp LCD_INIT ;

complete:

; SPI flash

sbi DDRB,0 ;

sbi DDRB,4

sbi DDRB,5

;

cbi PORTB,0

cbi PORTB,4

cbi PORTB,5

; MOSI SCK

ldi r17,(1<<DDB2)|(1<<DDB1) out ddrb,r17

; SPI , fck/16

ldi r17,(1<<SPE)|(1<<MSTR)|(1<<SPR0)

out SPCR,r17

start:

; FLASH- R21 R22

call dataflash_read

;

; 0x80

cbi PortD,7 ;RS = 0

ldi R16,0x8 ;

sts PortF,R16 ;

sbi PortE,2 ;

clr r14

dec r14

brne pc-1 ;

cbi PortE,2 ;

ldi R16,0x0 ;

sts PortF,R16 ;

sbi PortE,2 ;

clr r14

dec r14

brne pc-1 ;

cbi PortE,2 ;

sbi PortD,7 ;RS = 1

; "F" 0x46

ldi r20,0x46

call lcd_print_symbol

; "l" 0x6C

ldi r20,0x6C

call lcd_print_symbol

; "a" 0x61

ldi r20,0x61

call lcd_print_symbol

; "s" 0x73

ldi r20,0x73

call lcd_print_symbol

; "h" 0x68

ldi r20,0x68

call lcd_print_symbol

; " " 0x20

ldi r20,0x20

call lcd_print_symbol

; " " 0x20

ldi r20,0x20

call lcd_print_symbol

;

mov r20,r21

andi r20,0xF0

swap r20

call lcd_print_number

;

mov r20,r21

andir20,0x0f

call lcd_print_number

;

mov r20,r22

andir20,0xF0

swap r20

call lcd_print_number

;

mov r20,r22

andi r20,0x0f

call lcd_print_number

jmp start ;

;

dataflash_read: ; FLASH-

; SC,

sbi PORTB,0

ldi r20,0x52 ;

call spi_send

ldi r20,000 ;

call spi_send

ldi r20,0x01 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

;

call spi_recieve

mov r21,r20 ;

; SC,

cbi PORTB,0

; SC,

sbi PORTB,0

ldi r20,0x52 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x01;

call spi_send

ldi r20,0x01 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

ldi r20,0x00 ;

call spi_send

call spi_recieve ;

mov r22,r20 ;

; SC,

cbi PORTB,0

ret

SPI_send: ;

; SPI

out SPDR,r20

; SPI ,


⇐ 123456


:

: 2016-10-27; !; : 1021 |

:

:

, .
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