使用GPIO模拟I2C成功驱动DS1302日历模块之后,便尝试继续驱动DS1307日历模块。这两个模块的驱动有些不同,DS1307也许是符合标准I2C通讯的,而DS1302则不需要器件的I2C地址,只要直接对其进行读写操作。下图是两个模块的实物,DS1307模块上还集成了AT24C32flash,本次尚未对其操作。! o) {. ^' h s
0 [- J; {, z4 ^5 i) R
. n# a. Z& p' z- d3 X& v8 } 这是模块的另一面,DS1302上添加了三个上拉电阻。' j" f1 a( G# I. }8 m1 E, R
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2 E- f0 t4 e) Y9 r; @/ f5 b: D 测试过程不顺利,从网上搜索了多个参考例子,但读出的数据全是零,显然是没有驱动成功。然后又准备改用硬件I2C来驱动,先参照范例程序对I2C的读写操作进行了分析,我将I2C读、写操作的函数放在一起比较,基本上了解其操作过程,下面是对比的结果。
4 e8 @% ]. s" _: V4 B- /**
0 C/ v: A- ?: |' P5 a& S - * @brief Receives in master mode an amount of data in blocking mode.1 y) j6 e) u9 F7 g+ Y' R! n
- 在主模式下以阻塞模式接收大量数据。. _& V: x/ J% B% i T
- * @param hi2c Pointer to a I2C_HandleTypeDef structure that contains! m0 N) O ~/ f+ y
- * the configuration information for the specified I2C.: a% P8 S* Y% w
- * @param DevAddress Target device address: The device 7 bits address value) ]: `2 V# @4 ]
- * in datasheet must be shifted to the left before calling the interface. s* C: ~2 [+ q: \4 i' j0 {7 K
- * @param pData Pointer to data buffer) C) R$ x. K% r/ s6 x& a) Y" M
- * @param Size Amount of data to be sent
$ s5 A( f+ x6 @/ f* @ - * @param Timeout Timeout duration
8 Q! @6 @0 C$ S+ U3 H% t - * @retval HAL status
, t2 [" |/ F3 l# U n& i - */
5 j% J/ t+ b4 }! R6 j - HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)& y" v N. q* @
- HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)& B% e( x8 o; _8 ]6 D2 v5 \# ]3 v
- {
( U% Q, y! f3 g/ N( }$ e - uint32_t tickstart;
/ G% _- S2 s+ g+ }, [4 |! \ - ( e, Z1 b$ E0 N2 S" r$ H+ m& W1 _1 b
- if (hi2c->State == HAL_I2C_STATE_READY)
/ {4 {8 \+ d. R5 ~' l. ^8 Z: M - {
" g* u6 Q, D M - /* Process Locked锁定进程 */3 m/ [3 t6 |. s* @. O; X* n7 h
- __HAL_LOCK(hi2c);
7 I- ^) F; y0 T9 s
# |! G2 u3 m0 s \ j3 C3 e8 A! s- /* Init tickstart for timeout management超时管理开始计时 */
, K0 k7 f: a6 R6 Y - tickstart = HAL_GetTick(); @0 d; y) _( n- Y
( h+ U4 ?* J* \% w; C0 q7 ~- if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)! X6 b& L1 V. l$ U8 c
- {
# }! B. X) Z5 m: ]$ } - return HAL_ERROR;) a0 o+ a$ S r, n
- }
" r' ]1 m2 Y, Z7 r- p
# z2 `9 a8 S, C t- c# x: p- hi2c->State = HAL_I2C_STATE_BUSY_TX;
8 w b* C5 w7 {/ w% z - hi2c->Mode = HAL_I2C_MODE_MASTER;$ Z# R9 I4 z5 I! w# V6 q0 D
- hi2c->ErrorCode = HAL_I2C_ERROR_NONE;; u' a$ Q' h. m! Q% v8 O& n
) \) k6 y# C6 @* p. u+ a ?7 `% T- /* Prepare transfer parameters准备传输参数 */9 Z) m; v' j0 d* @
- hi2c->pBuffPtr = pData;
6 U4 v8 W/ z! A: Z7 Q' c' m - hi2c->XferCount = Size;. t- g! Y9 S. b6 E
- hi2c->XferISR = NULL;) ~' e* o5 H" B" t- m
- # H1 {. d) l* {, f
- /* Send Slave Address发送从机地址 */
7 ?* r1 M. Y) p6 `3 s+ l! J3 ~9 H - /* Set NBYTES to write and reload if hi2c->XferCount > MAX_NBYTE_SIZE and generate RESTART+ ^; s2 z) s: y5 T# Q
- 如果hi2c->xfercount>max戋nbyte戋u size并生成restart,则将nbytes设置为write和reload */) t4 Q/ T. Z' f4 H6 ^/ v% t
- if (hi2c->XferCount > MAX_NBYTE_SIZE)
% Q% r. O4 g: n. [ - {! w u' w6 ]6 Q1 d
- hi2c->XferSize = MAX_NBYTE_SIZE;
0 P5 w" u! s9 b3 G: v2 q - //T I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
; |, i0 W# }( R C* ^7 H% d" d0 D - //R I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ); 9 a4 W* p H& p6 F9 q) @
- }& T3 Y5 r1 O/ `2 m. O& D
- else
) R5 A1 Q# f/ Y }; @" `2 T - {: Z. q8 k, a6 w/ b) l3 C# b, K
- hi2c->XferSize = hi2c->XferCount;: W% C. T; S l7 J8 r2 C3 A; b/ ~
- //T I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_WRITE);' K1 A% H- L9 h* G: s- b" D4 E
- //R I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
+ }- Z7 I$ T8 }0 x6 I% t+ Y" J - }- I" T; f, W5 |
* V8 N( l$ |$ u( p0 m- while (hi2c->XferCount > 0U)0 z1 O q0 v- \( X6 {% a6 r* a
- {
, e5 _/ B) x+ i$ ? - /* Wait until TXIS flag is set等待Txis标志设置完毕 */5 j; Z2 w' n* X) O* K
- //T if (I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)0 D1 U, L* t: w# a1 ~) ~
- /* Wait until RXNE flag is set等待rxne标志设置完毕 */- X# ]9 X) @6 C
- //R if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
6 r3 X' g7 r; }' J" Z/ {- | - {
" U7 h' z) `* Q, t - return HAL_ERROR;
- t1 Z: `7 D3 L4 i - }9 H& W7 D0 w; U
7 R5 T( `; n5 e; b. @- /* Write data to TXDR将数据写入TXDR */
# k( C7 F5 \! k- R8 X - //T hi2c->Instance->TXDR = *hi2c->pBuffPtr;0 ^7 x% B: T6 G1 u6 F0 _
- /* Read data from RXDR */
& ]5 f a; F, C3 k - //R *hi2c->pBuffPtr = (uint8_t)hi2c->Instance->RXDR;6 }0 n/ n8 i6 a
- $ f2 `1 S: E% @1 u) l
- /* Increment Buffer pointer移动缓冲区指针 */6 a4 L; q2 m' a
- hi2c->pBuffPtr++;
" l$ ^# |: c1 L- w+ D - ( A; a2 A7 B9 {5 n1 J
- hi2c->XferCount--; s- @# A$ @% I. A
- hi2c->XferSize--;
: S2 G# B1 f. t. G- B - & a, G' n- V% @, Y/ P% V' y3 N
- if ((hi2c->XferCount != 0U) && (hi2c->XferSize == 0U))
7 U3 v# L E% H. f$ [ - {
$ I J- k3 k j - /* Wait until TCR flag is set等待设置TCR标志 */, S0 b' [" _7 X- I8 b6 c# J
- if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)) ~% [* ]6 l$ G5 F5 `4 C/ O/ ^+ c! E
- {
% a5 E) Z7 `4 ^( B; R - return HAL_ERROR;/ M' F) T1 Q6 n+ z) S5 ^5 V: a
- } N E2 m8 p4 S5 D7 r( u/ o
- 7 C$ D) `9 q9 I
- if (hi2c->XferCount > MAX_NBYTE_SIZE)
3 R5 u4 o- s0 z. @% c - {
" M! }9 F% L0 A* r - hi2c->XferSize = MAX_NBYTE_SIZE;/ c1 l8 S6 E) U) k3 E
- I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);1 `5 ?+ n' E7 A- l* |! |; l
- }6 Q" \5 ]3 S' T/ H% B
- else
/ |7 I, l9 A0 }4 l2 A0 A - {* g, R# D. Y. m- C% Z
- hi2c->XferSize = hi2c->XferCount; w4 v( Z* Z4 ~- G* H5 G
- I2C_TransferConfig(hi2c, DevAddress, (uint8_t)hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP); O) g1 }: s3 C3 ], V: Q3 Y
- }
# h1 F: P- ]( [ - }
: ?6 J) Y' W; W& m$ B - }; u9 p2 C$ Z, \; N I x1 D! G9 v
1 E6 k% @# w8 c+ J$ p- /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated
) M# p7 H; }9 X - 无需检查TC标志,在自动结束模式下自动生成停止 */' j4 X6 \, i# D) I; D4 a- p7 M" W! T, U- K
- /* Wait until STOPF flag is set等待设置stopf标志 */
3 q$ e7 x' D( v: S, g$ N9 c. ]- S x - if (I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
5 d3 ^, n. j2 g, q - {
7 v% ~- U; H4 K7 S5 |" a - return HAL_ERROR;
: l* U- a; f: p- k( L) T; W - } j2 G8 Q6 M3 N w/ ^9 s
& N( \2 l/ n! f! B- /* Clear STOP Flag */
% x2 u0 j, v3 N! U v+ |- Q& Z - __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
6 k) H: U7 Z7 W+ f+ X( H
2 I, k3 ~, s& b" F7 }& V0 D- /* Clear Configuration Register 2清除配置寄存器2 */: M+ A6 V: d1 k
- I2C_RESET_CR2(hi2c);
. l% w8 W4 V' a2 P+ r5 k0 q' x+ I3 m
5 ~$ Q- [" G% P) D9 H7 a% G3 {' C$ C4 H- hi2c->State = HAL_I2C_STATE_READY;
5 g: I5 ~* h7 s9 _+ C6 A7 v% K - hi2c->Mode = HAL_I2C_MODE_NONE;
3 R( g% T. c0 B4 B
8 [/ T4 ^; u/ Y ?6 W- /* Process Unlocked解锁 */$ E; K- z+ j* C4 ?& K
- __HAL_UNLOCK(hi2c);
. m# _5 W/ y3 d: F+ _9 M
# R S: R; ?" R7 ^' c6 g* B5 q- return HAL_OK;
U. J0 d) V2 | F/ P" ?# ^6 r; X - }
U+ b, X: H8 @ - else
4 d" `0 o7 B7 Q2 l1 }! Q - {. ?$ G8 U9 B5 ?) R `
- return HAL_BUSY;
4 F/ U7 I$ t7 ^* l4 o6 a: z0 {+ p - }
( J; n0 e( o" ?- ~& w4 P! V' T - }
: _; G6 r c, S3 _! p$ X
复制代码
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7 ] {+ A. C. _
然后参照范例写了对DS1307进行读写操作的函数,但调试了两天都不成功,不知道是错在了那里,下面是对DS1307进行读写操作的代码。. r; M# _' E; c8 K) J/ I
- #define I2C_ADDRESS DS1307_ADDR7 k9 t/ |+ G7 H { ]% b7 N) m
- 6 H% C* T4 {2 `* X9 _
- /******************************************************************************************
; B6 E1 b# k. d* O. x - * 函数名称: DS1307_I2C_Read()
8 n6 D* \, k2 r y9 `+ J. R - * 功能说明: 从DS1307地址addr开始获取size个字节的数据,获取的数据存储在全局变量DS_Buff中
7 C8 b/ ?' s! { - * 输 入: uint8_t addr 获取数据的开始地址
% n3 S8 V; N- p+ l - * uint8_t size 要获取的数据个数(1~8)
' T& O& z3 e+ u! E - * 输 出: ui08 0=RET_OK 成功从DS1307获取数据 >0=从DS1307获取数据过程中出现错误
+ C+ O# m: b3 L+ Z& T/ u {* _ - ******************************************************************************************/
' @3 s3 _ a" s* h - uint8_t DS1307_I2C_Read(uint8_t addr,uint8_t size)! o" a1 _( t$ H# Q7 y
- {
) }+ C& Q' p6 W9 ^0 j I3 I - DS_Buff[0] = addr; //将要读取的起始地址发送给DS13071 ]/ e7 J! V$ _: G, _3 Y! a
- while (HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)I2C_ADDRESS|1, (uint8_t *)DS_Buff, 1, 10000) != HAL_OK)# G; ^+ p- O4 t8 [; O ]
- {' b2 P& s& v$ A W) z
- if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
8 f. x: Z3 m. y - {
8 F( ?& i. O+ x, Y- K - LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307WR Error");
! b+ n; X+ X7 b' v8 e - return 1;
: [9 @: }6 {8 M4 u - }! S% m7 u m. \- S9 B% F5 f: e
- }
0 @ K# T; _: ]2 L - while (HAL_I2C_Master_Receive(&hi2c1, (uint16_t)I2C_ADDRESS|0, (uint8_t *)DS_Buff, size, 10000) != HAL_OK)2 O4 h5 P8 D3 {: T
- {* c/ @7 k+ h& J- l4 y0 _) Z0 o
- if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
- A. c9 Q# r7 l. p( H5 M7 o& p - {
* ~! J# m8 B1 A/ k5 C - LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307RD Error");
9 R6 x8 S9 S0 J0 ^9 k% T - return 2;; v; @& p* c# |
- }: {4 Y* Z- S$ Z9 O& R3 J8 r/ X
- }
2 }1 y6 l! l. B) C - return 0;
; ~. m' A: a0 W9 @ E! E - }3 j0 }: H& t% N" ?9 t8 `+ y
' q6 y, ~5 j: R1 t9 G2 a5 l$ v- /****************************************************************************************** ! A% Z4 F2 x5 Y
- * 函数名称: DS1307_I2C_Write()
/ l9 t# e. N3 u* o, U1 N5 q - * 功能说明: 从DS1307地址addr开始写入size个字节的数据,数据存储在全局变量DS_Buff中 [. D2 t; o$ }6 T! q
- * 输 入: uint8_t addr 写入数据的开始地址
1 \( G5 S' x( b/ w2 i- ^6 Z - * uint8_t size 要写入的数据个数(1~8)$ t1 U Z* _, R$ P/ I9 [5 L
- * 输 出: ui08 0=RET_OK 成功写入数据 >0=从DS1307写入数据过程中出现错误
4 h) T& k* r2 Q - ******************************************************************************************/. I1 t( y; h5 Z) B+ u
- uint8_t DS1307_I2C_Write(uint8_t addr,uint8_t size)+ l3 Y/ u2 N- |1 d/ C
- {
. D; M' C4 h+ A4 X2 _ - uint8_t i;& n. B" z( l5 V3 R- y
- i = DS_Buff[0];
8 R) v& n/ k7 H% A2 P! Y5 J - DS_Buff[0] = addr; //将要写入的起始地址发送给DS1307; q; k% u. r. B+ ~- J8 J$ \
- while (HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)I2C_ADDRESS|1, (uint8_t *)DS_Buff, 1, 10000) != HAL_OK), B3 u/ x& h" ~# d7 _9 A% A
- {% }% h/ k( P E; @/ i) L/ w, a( x
- if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
, u" m( e: f! W9 f1 n - {6 j8 o. k. ?# n
- LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307TX Error");
# b( q( q, Y2 _5 Z2 s7 M - return 1;' H; e, M0 y& K# J
- }# E9 }: `' K) o3 \& ^* E, R
- }) {7 t4 L, D6 t9 }9 W
- DS_Buff[0] = i;
" {, \# _$ T& R: |# E7 I8 e - while (HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)I2C_ADDRESS|1, (uint8_t *)DS_Buff, size, 10000) != HAL_OK)& [% Q4 t* s# i( V- R
- {. o; j8 @ a& U9 ?
- if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)* v. ~- i1 [0 J$ I7 }9 i. A
- {4 R" Q' }$ Y" h, C: X5 k- E
- LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307TX Error");
; P' [) X$ J% e: q3 Q" q- r - return 2;
. @& a' j. Z; Z( \+ ]; x - }) ~( h# w5 j' K: |7 Y% m
- }. |! Z0 Z4 r' |3 B& ]* r
- return 0;7 i% L# ~6 X, \4 A t* }, m' h( G
- }$ l# v3 U3 _6 f, k& l
复制代码
- U) C& N: J1 B) o
' B3 {2 ~. l2 r& _( |3 u2 U
! h ?6 q/ G& I7 S 这是初始化DS1307的代码,首先读出秒寄存器数据,判断其是否在工作,若尚未在工作就对其进行初始设置。在这里就出错了,读不出正确数据。/ a5 m# ~; b4 p+ u& ]
- /****************************************************************************************** + ]6 u3 |1 k3 x; E; ]: y# M* b
- * 函数名称: DS1307_Init()! @& K8 c; y9 Y( _
- * 功能说明: 用当前日期(yesr,month,day,hour,minute)初始化DS1307
$ v4 q! S; I. k! y8 O# t+ n - * 输 入: 无
' |) o& s& O! h - * 输 出: uint8_t 0=RET_OK 初始化成功 1=RET_ERR 初始化出错) r d9 z7 ^5 |% {) q3 o3 k7 A
- ******************************************************************************************/, ~5 ]" M+ F6 A8 J8 H, ]
- uint8_t DS1307_Init(void)$ y/ R% O* s5 ^$ }5 Z( F" a1 g
- {
; V. y4 T5 Z) K8 \0 p. D - uint8_t temp;, A1 ^: Q" e7 R( a. v4 U4 e! _
- ; g/ a$ |, c1 z5 h! P9 C$ @
- // temp = DS1307_Read(0,1);
" D" X" p9 o( Z; ]& q - temp = DS1307_I2C_Read(0,1);
* f2 W: ~- J h* y# ^- m - if(temp > 0)
2 v" x3 w" D) q- z5 a0 s8 \ - LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307 R Error"); //读秒数据,判断DS1307是否在工作6 d7 s" L5 w; n" ^) r! A+ e
- else
3 J5 q! Z$ r8 e - LCD_write_ASCII(0,3,1,(uint8_t *)"DS1307 Read OK");
5 ^) ? y$ d& ?; s( j - HAL_Delay(1000);+ R' y' n! _: U+ [# _3 J% }0 j
- LCD_write_value(0,4,5,0,0,temp);; h( M6 s% s1 s2 |8 B3 @& F
-
( G5 K# w* l! f1 R% c! q" `6 ~ - if(DS_Buff[0]>127){+ Z2 r2 @7 p$ ?: Z
- /*
& @+ r0 C1 C: ^) g6 v2 X* c - DS1307_Reg.yer.b.yer10 = 1; //年
- z; _3 E; e/ ?0 b: X" f7 v! @ - DS1307_Reg.yer.b.yer1 = 9;
8 J: ~' R/ U. v( ` - DS1307_Reg.mon.b.mon10 = 0; //月
, _. k: E1 S* E# O7 K. G& ` - DS1307_Reg.mon.b.mon1 = 9;, L, G: `' c3 U$ w- y1 Q, c
- DS1307_Reg.dat.b.dat10 = 0; //日
7 u/ S/ a, n' M! K5 h: s9 u - DS1307_Reg.dat.b.dat1 = 9;' T0 s3 d6 Y C' }6 M
- DS1307_Reg.day.b.day = 3; //周
9 y% \, [- a2 {" k% z- C) ` - DS1307_Reg.hur.b.hur10 = 1; //时% N" A; V, Y" ?
- DS1307_Reg.hur.b.hur1 = 0;
; I( N3 s4 X6 V; t: Z; A0 R0 m( @+ H - DS1307_Reg.min.b.min10 = 0; //分, `# j9 h7 Y0 X3 {1 ?6 @
- DS1307_Reg.min.b.min1 = 0;
: s7 x0 |$ c1 |5 N - DS1307_Reg.sec.b.sec10 = 0; //秒3 A5 [+ o9 d( |1 c Z
- DS1307_Reg.sec.b.sec1 = 0;
1 Q+ _; B/ e: W) y3 S- Y5 c% t3 U& M - DS1307_Reg.sec.b.CLK_H = 0; //开启时钟/ @& }; X; d" x0 X' l8 q) a% Z$ O& Q
- DS1307_Reg.sqw.b.SQWE = 1; //使能方波输出8 \3 [/ q J* m6 C$ x
- DS1307_Reg.sqw.b.RS = 0; //方波频率选择:1Hz7 a* W& s, y( g- h% G& k0 r
- */
" l+ C; N/ C* ]+ h1 M9 _! x - year = 2019;
: K' D. j2 H/ ~' m/ Y - month = 9;
0 A5 a2 q1 Q/ } - day = 12;7 f" K8 j3 U9 C* G D3 G9 S1 ^
- week = 4;
. L/ m4 V0 g4 G* L - hour = 12;
5 S4 ]. o, u3 o1 E - minute = 30;- A% U/ S( |% A. M$ F
- % d" [/ @: N0 R6 v9 W" q* j5 a1 S
- DS_Buff[0] = 0; //秒
- j v \0 }- v3 i - temp = ((minute/10)<<4|(minute%10));
$ E0 n* J& V& C! O2 x9 I - DS_Buff[1] = temp; //分
4 ~. X" V; o$ u' x# H8 t$ w - temp = ((hour/10)<<4|(hour%10));
* X2 G5 m4 T4 K4 G( R - DS_Buff[2] = temp; //时
+ ~7 P( V+ G8 ~, A8 l0 [ - temp = ((day/10)<<4|(day%10));
- t$ A( h1 H0 P' d: F: S - DS_Buff[3] = temp; //日
) d- j1 O0 D9 \ -
2 ? s; l$ V0 j1 { C4 @' j - DS_Buff[4] = week; //星期
7 U' U# X" g" u: v" ` - temp = ((month/10)<<4|(month%10));
# }/ s( x# Z8 Z7 \; q+ H - DS_Buff[5] = temp; //月6 C) ?* E- T1 | \
- temp = ((year%100)/10<<4|(year%10));9 z" E: f) c& k: `' s, ^ w
- DS_Buff[6] = temp; //年
* [) {! X" i! E7 ?2 `2 P7 r - : ], I5 [/ ~6 u3 h$ v) R
- DS_Buff[7] = 32; //0010 0000 = 允许按1Hz输出方波+ c( m. I7 Y9 x1 l
- & {) w0 U# a0 K, y3 W8 N2 f# l
- // return DS1307_Write(0,8);
! U" G4 Q' D& L F. D a - return DS1307_I2C_Write(0,8);
0 N- W# z+ a# |4 f: N - }6 X7 m9 }8 t" A* M+ @! f
- else. p' W/ d' i' `) x+ a `
- return 1;
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% Z5 V& y! t% K; Z/ P2 X- /******************************************************************************************
1 [ J* \$ e h - * 函数名称: DS1307_Config()
n8 n: d) l( x# O2 L! t0 c - * 功能说明: 配置DS1307_OUT中断引脚$ l; ], v3 z3 E" x( K8 K: J
- * 输 入: 无
* b5 l0 h2 `& X, z1 e% C - * 输 出: 无
2 j! ^/ f* a/ v, j6 `" F - ******************************************************************************************/5 O ?" Q2 U& V/ E2 m
- void DS1307_Config(void)3 B7 [, X7 ? [. K; A3 l
- {$ {% L$ u2 r s5 E* u! i
- /*
$ i$ _7 Q0 g3 A$ P4 ? - GPIO_InitTypeDef GPIO_InitStruct;# K/ j& }; R3 a$ T) S6 }
+ ^; y: a: m! N* h9 G% e- GPIO_InitStruct.Pin = DS_OUT;
, B. `# R4 C; @8 S4 }6 i - GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
' o& r6 y+ L2 ]0 m; p% v - GPIO_InitStruct.Pull = GPIO_NOPULL;
% s4 v3 ^+ }8 t: a" | - HAL_GPIO_Init(DS_PORT, &GPIO_InitStruct);
8 q0 e2 t3 W& h7 v6 z - */& v, m# _; V, Y% j7 R
-
3 s% h8 D$ k5 ` - SI2C_Config(); //配置I2C
7 k% D V: b7 D* v# a - }* S2 A9 u& H: J1 H6 M9 P
- ! J6 E' a1 N/ a
2 U' V( v# r) s( T0 q+ ~- /****************************************************************************************** , P* ?: P9 K7 ~
- * 函数名称: DS1307_read_date()
( `) O% `( Z2 H - * 功能说明: 读取DS1307日期时间数据3 \/ F: R f2 A7 M- q; I
- * 输 入: 无5 g! {8 X5 I; q1 S
- * 输 出: 无1 g1 {! d* H/ E+ _2 m, P
- ******************************************************************************************/& \8 P; @3 C0 |7 x
- void DS1307_read_date(void)
+ G7 y" V& p& _0 B% k( M - {/ X: V2 \' d% k
- // DS1307_Read(0,7); //读取前7个字节数据
/ E3 U' O8 k- b' V6 ]+ s" N4 g/ o- a$ E - DS1307_I2C_Read(0,7); //读取前7个字节数据, m+ K% J. l3 w. C/ \! i
- second = ((DS_Buff[0]&0x70)>>4)*10 + (DS_Buff[0]&0x0F);//秒,屏蔽秒的第7位的标志
5 g2 ~5 `& o: l: Q7 k - minute = ((DS_Buff[1]&0x70)>>4)*10 + (DS_Buff[1]&0x0F);//分(取低7位)+ Q6 A1 c8 _6 |8 q( }0 W0 i( V
- hour = ((DS_Buff[2]&0x10)>>4)*10 + (DS_Buff[2]&0x0F); //时(取低5位)( J$ W0 ?( T4 e/ z" i F
- week = (DS_Buff[3]&0x07); //周(取低3位)0 ]' n/ x K" M
- day = ((DS_Buff[4]&0x30)>>4)*10 + (DS_Buff[4]&0x0F); //日(取低6位)
: f- R5 X8 Z0 n! U; N! x - month = ((DS_Buff[5]&0x10)>>4)*10 + (DS_Buff[5]&0x0F); //月(取低5位)- D7 f4 R1 J# k
- year = 2000 + (DS_Buff[6]>>4)*10 + (DS_Buff[6]&0x0F); //年0 B+ b, ~5 F* m7 C* j: E* {
, B$ F) \( ~0 G- }. p) A$ @# S1 k3 W1 n+ h
- & s; f0 ]. X( u7 m; E
4 p x* K- x: |- /****************************************************************************************** 7 w1 r8 D/ t1 A/ {7 E9 w% _) m9 |! }
- * 函数名称: DS1307_write_date()
) M$ c. c2 C3 S$ \- @! V - * 功能说明: 读取DS1307日期时间数据+ ]# Z9 L1 z* n& M3 g4 b
- * 输 入: 无
" y* b& M$ e3 t. f* e - * 输 出: 无
& C+ O9 |2 R8 f$ c2 s& t0 ~; k - ******************************************************************************************/
# J5 F! N$ E Y( Z6 k+ s - void DS1307_write_date(void)* m `4 K' d1 _
- {: q8 f8 ?. x3 V- n, A, e" W* z& s
- uint8_t temp;
3 U% ]; G4 t6 B/ b9 V- Q& z9 H -
& m* @, L) ]7 F( ]8 x - DS_Buff[0] = 0; //秒$ ]' Q- ?; G5 w( h
- temp = ((minute/10)<<4|(minute%10));
4 E: V0 H6 Q4 B1 ?7 U# c - DS_Buff[1] = temp; //分
g/ }# F! s" [- H2 L - temp = ((hour/10)<<4|(hour%10));9 L9 z0 j. Q! G6 s& C1 {
- DS_Buff[2] = temp; //时
" M7 b& `9 |: G$ j& k. g( c! N - temp = ((day/10)<<4|(day%10));* v; v# c$ J( H& O8 h9 S. M5 h
- DS_Buff[3] = temp; //日- U. |! _/ j' b. Z. a
-
! H9 ~( j- g# r5 \5 n+ o0 [6 N - DS_Buff[4] = week; //星期
) z( z7 X$ [) Y - temp = ((month/10)<<4|(month%10));
' P$ e# F$ ~1 A! S7 E H5 j" f - DS_Buff[5] = temp; //月
. m. A/ N8 o! ~& V E/ E - temp = ((year%100)/10<<4|(year%10));* N) R/ k# B; M' e$ I' U
- DS_Buff[6] = temp; //年
) K" f% k1 W# J, L, o, B -
$ Y4 D7 v3 @; ^$ B4 j - // DS1307_Write(0,7); //写入前7个字节数据% O/ P7 b% @0 ~
- DS1307_I2C_Write(0,7); //写入前7个字节数据* e: S3 `! @! [2 d
- }
" j5 b" k6 a" @: I
复制代码
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- e7 d+ ]9 c3 X |
DS1302不需要器件地址,直接对芯片进行读写操作,而DS1307则需要首先在I2C总线上输出从设备地址,得到应答后再进行通讯,而且我买的这个模块DS1307与AT24C32两个芯片的SCL和SDA是连通的,也就是挂在同一I2C总线上,需要通过器件地址来操作其中的芯片,所以应该是标准的I2C通讯。