正好昨天论坛有童鞋问了一个问题,这是C语音的一个小细节。如下:ok case1:用的比较少 直接用的 struct{ }ringbuf; S9 ~0 }/ I/ b$ h# a& E! H% |0 X
- #define Buffer_MAX_SIZE 10
7 U* N: Z/ {0 |) E6 E- J; c - struct{
' L$ O( q) n7 _' D% M. } - unsigned int headPosition;( p% e7 A4 X q L! z9 b
- unsigned int tailPosition;- D" D! l8 L( N" M4 R
- unsigned int *Dat_Buf[Buffer_MAX_SIZE];0 d( }/ P5 ^; e' R8 T$ K* G
- }ringbuf;6 z6 U3 y7 k- c1 K) s- {) R1 w; p
! e& {6 {: O* \8 O2 g4 W4 ^ F% r& Z- int main()
9 f- d' V, D$ R# z - {
5 w% p: S& l# h; T, |6 }( Q: m& ?( } - ringbuf.headPosition=2;( G8 \/ R) c+ x7 r7 T% ]2 J
- }
复制代码 ok case2:墙裂推荐用法 typedef struct { }ringbuf; ringbuf Ringbuf;
q# `& ?$ B8 G/ t8 P' j" R- #define Buffer_MAX_SIZE 105 b) Z/ V' _# M* h2 Q- Z0 w4 B
- typedef struct {
7 r. A% F& F" Q% G - unsigned int headPosition;0 |0 X) [& T( q- t' x4 z9 K
- unsigned int tailPosition;
4 z: X8 [& O# ]- ^ - unsigned int *Dat_Buf[Buffer_MAX_SIZE];
' ^. f _, T; N. F& a - }ringbuf;* J; B/ a2 ^8 e& T, v7 r% B0 W
- , X T/ H/ F# Q" v. e! {6 e
- ringbuf Ringbuf; Q3 y4 n& l% h# z! g) n0 H
' V: w6 m% v( u- int main()- J. ?9 L7 t7 |* j1 s; E
- {
( g4 u& j: Q1 P5 y: _, Z - Ringbuf.headPosition=2;# k5 R6 ]1 E& b) X
- }
复制代码 ok case3:类似于上面 也就是typedef struct _ringbuf{}ringbuf;的 _ringbuf可有可无 R1 x1 M' b) E9 p5 `. I) s4 |: X
- <blockquote>#define Buffer_MAX_SIZE 10
复制代码 好了 开始机器风格的第三章,跟第二章一样,但是他更加简洁。第二章用的是case3 本章我们用case2- i4 U1 ^, c# E8 s1 p5 w+ K( n0 X- k
第一部分:框架
6 M4 h( \0 @$ P+ E3 V2 ~7 ]- typedef struct( e& z A; G8 `2 _
- {1 {# U" @: @) O0 \( ^5 d1 Z5 g$ x
- KeyParmaType KeyParma;+ @, B* C8 t% ]
- DeviceFixedPwsType DevicePwd;0 i* X3 R" U# ]/ f' n
- PwdSavePosType PwdSavePos;: }5 k1 o: \, B' C% x% q
- PwdSaveVarType PwdSaveVar;
" k+ W: q6 z3 B; n- n - }_TouchKeyVarType;9 x$ @9 ?$ C9 ?% Y, t9 m( F
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- typedef struct) z4 _& |- q- c0 G/ @
- {. I" \6 G! |) f; Y$ o* v H
- void (*AddOpenLog)( void *pL , BYTE *UsePwd);
0 D- |8 J3 r5 |# J9 c9 R - void (*AddTempPwd)( void *pL , BYTE *ucPwd , DWORD dTimeStamp);2 C" n/ e# Q. I; q+ g/ M' k
- void (*TouchI2CInit)( void);
( V3 _2 g2 O0 j - void (*TouchLightInit)( void);
8 _ l: T0 I+ [: _' h6 l2 x - void (*LightOn)(void);6 `1 O+ |- ?# g4 @/ Z) W3 p
- void (*LightOff)(void);
% i O. Q! T0 P4 ^# y7 k - void (*ParmaClear)(void *pL);' ^0 `8 F/ ~0 p c( ^
- BYTE (*InspectPwd)(void *pL , BYTE *UserPwd , BYTE *InputPwd , BYTE len);
2 `( A& F7 f R! D6 k# G/ P - WORD (*ReadTouchIc)(void);//Read value form touch ic/ {3 V; E8 w k2 i2 O' q0 D0 n, F, n
- TouchKeyValeType (*ReadKeyVaule )( void *pL); //Read key value
# I" u& C" c% ? - }_TouchKeyConstType;
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- typedef struct7 i5 X( j5 ?: `" ?0 W# H% O# K' J
- {1 ]; @% ]: o0 X; t
- _TouchKeyConstType *TKConst;
* R% A4 V: k1 D- v- ^ - _TouchKeyVarType *TKVar;9 L- ~( o0 A, T; M
- }_TouchKeyHandleType , *TouchKeyHandleType;
复制代码 可以看到 它的风格_TouchKeyVarType这种,_ 开头的就直接是名字了。最后封在一起: E' {. q# R/ ?# z+ u
_TouchKeyHandleType , *TouchKeyHandleType;----------用_ 和 名字区分
7 s3 t7 M: Y* ?/ Q% Q' h) x前面第二章是 BeeperType, *PBeeper;--------------------用Type和*p名字区分
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第二部分:实例化
% \3 F: n( X& [- _TouchKeyVarType TouchKeyVar;
复制代码 一样的 数据成员暂时不管
6 J* }2 G- C8 q7 ~! v. x$ O i方法成员则实例化 比如下面的实现4 Y9 E1 b& H) A; @
void SetTouchLightOpen ( void ). Q% J7 G# M1 B' Z
{
3 B: S' g$ g7 M( A' [0 W7 E GPIO_SetBits ( TOUCH_LIGHT_PORT, TOUCH_LIGHT_PIN );2 s* q. G8 H: y' C e
}
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S/ S& G5 x3 f' M U第三部:使用9 {0 G3 I' u; M- P& l( T( e" ]
现在gTKHandle就是一个全局变量了,它是一个句柄,(不是指针它是实体),它包含password的全部属性,拿去用吧。3 r; Z6 H0 Z! }
如果喜欢指针怎么办?# X0 c E* a" S) g& h3 p
- void vKeyInputTask ( void * pvParameters )& U7 I& N& b; s+ a
- {# |+ k/ l+ m* G' n( Q, q5 A
- TouchKeyHandleType pHandle = &gTKHandle;//指针出场
复制代码
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- l9 T6 r& c1 y7 _' D9 E a最后详细说一个案例:注意ReadKeyVaule
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void vKeyInputTask ( void * pvParameters )0 K8 k, o3 v! Z$ ]8 Y' r; w, [
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TouchKeyHandleType pHandle = &gTKHandle;//指针出场/ o4 ]! v. ?. c2 N, Z1 V
KeyParmaType *KeyData = &pHandle->TKVar->KeyParma; j9 {" {& A( z7 b
BYTE ic_door = 0;% L' n6 P2 U- I
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pwd_log ( "Into touch key task ,password is init...\r\n" );* _4 J z% a8 X. m- w' y
PasswordParmaInit ( pHandle );
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0 ]* q1 i- T! }9 n% K( ` while ( 1 )
, K6 X( u: ^; l: D) M5 l T8 R {
# F; M' b6 l; \. \6 ?9 b5 v) x if ( xSemaphoreTake ( xBinarySemaphoreTouchPwd, portMAX_DELAY ) == pdTRUE )
. {* D! P( S9 ~& |- ]) }' T {& e3 a- P) h, {8 X" U
if ( KeyData->ucInputKeyFlag == INPUT_KEY ). X7 V3 U/ M+ y! U# [8 N
{
' s& ~3 U( S5 |8 k TouchKeyValeType KeyValue = KEY_INIT;5 f5 w4 f' f# Y8 x; c1 o. l L
6 x1 H/ y3 R8 g. _ KeyData->ucInputKeyFlag = NO_KEY;' O; n- _) x# L) ?- `- ~9 z
KeyValue = pHandle->TKConst->ReadKeyVaule ( pHandle );---完成死循环 定时轮训这个函数。6 i: v5 u0 t* O
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前面已经初始化了
|7 V; p3 {- G_TouchKeyConstType TouchKeyConst =
; {# y" w% `+ g: _, A4 V( S' Y{
) {4 K4 ^, s& J" G" l .AddTempPwd = GetTempPwd,1 o, X; r+ h0 y& c. _. A# C
.ReadKeyVaule = ReadTouchKeyVaule,
: e7 G" \& `- b" | w6 [。。。};
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6 L- O2 p+ D/ F3 ~" F3 l我们看ReadTouchKeyVaule的实现(你无法找到它的调用的啦!!)2 v( h# d$ l* ^
- TouchKeyValeType ReadTouchKeyVaule ( void *pL ). v6 ? N/ A" f3 a' f: }2 p& \
- {
+ D3 u4 g8 e2 Z, Q1 o$ { - TouchKeyHandleType pHandle = ( TouchKeyHandleType ) pL;
6 X1 j- z: \$ c# E7 m* c M% P - WORD ReadVal = 0;
! {! M. x$ R) M8 E - TouchKeyValeType ucKey = KEY_INIT;
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0 b6 a8 ?; A' h' I* a3 r2 O- ReadVal = pHandle->TKConst->ReadTouchIc();' `5 e7 M& e& c/ O. o; E4 y
N S9 M0 P, h- A% I- switch ( ReadVal )
- G+ @! p* M, ?' H, Z: e - {
: s* l- u" F& d - case 0x0001:6 A+ H4 {4 i& x' U
- ucKey = KEY_ENTER; M+ w( l4 m. ^$ p" U4 ?- Y
- pwd_log ( "Input # key \r\n" );
8 A! G2 r6 F" D - break;, y z8 P+ x! {; `% s- q
- * V) H) c# w# _
- case 0x0002:# n+ ~- D5 N: ^; t" D
- ucKey = KEY_0;' H1 M3 K$ r: C" ~
- pwd_log ( "Input 0 key \r\n" );+ S# W. H4 l% K1 v9 i) p' i- n
- break;
2 z5 s4 y4 K3 U) U; u. j - ' }9 x% f- G$ r* s' w {/ h H
- case 0x0004:( R# y- r9 \3 N1 N
- ucKey = KEY_BACK;( ?* D' W5 o9 k0 a+ @) {5 Z* S
- pwd_log ( " Input * key \r\n" );
9 E8 V* d. A' B( F- d4 ~ - break;
6 q" b# H. A [; {" E1 Q0 Q
: z% j8 Z" S& r- `. Q8 k% x" C1 k- case 0x0008:
6 x# A; H& b) W' u/ P/ B - ucKey = KEY_9;4 W0 t- S: Z9 D/ }7 L" C1 F
- pwd_log ( " Input 9 key \r\n" );5 R- N$ F- P, D! t) o( M8 h; N
- break;
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- case 0x0010:- a5 u6 Z! u+ }9 o p
- ucKey = KEY_8;& O: x. i" p2 P* v8 \( l6 F
- pwd_log ( " Input 8 key \r\n" );
7 L3 j( D/ ~ a" i7 M: z$ P) P - break;
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- case 0x0020:
2 x% ^. ]2 A$ \2 Y: S - ucKey = KEY_7;& g4 H8 K: e6 w2 H# L9 m d
- pwd_log ( " Input 7 key \r\n" );9 `/ Q$ G% v- V h% s
- break;3 I4 w) l( C' f) x
- ' d6 X' x$ v) a2 d( @- X0 M1 l
- case 0x0040:
. z: q. n! F/ O- r6 R - ucKey = KEY_6;
2 _) H; b# l- j9 j% h3 S7 M - pwd_log ( " Input 6 key \r\n" );
. @. p) g) c6 O! ~* j - break;
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- case 0x0080:
! L* a1 J' }0 n2 B - ucKey = KEY_5;! h" x. b9 u/ x1 u- n* G
- pwd_log ( " Input 5 key \r\n" );$ \1 T& {0 N ~; s+ U- s6 g! ]
- break;
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! q. e+ A- l1 }" p- case 0x0100:" @) R- Q9 @) k+ q; j* G
- ucKey = KEY_4;
7 O4 r: R( I, F7 T& f5 d - pwd_log ( " Input 4 key \r\n" );
+ `8 q/ X& K1 ^) H: F - break;- t5 ~! p( x9 `1 M2 G* X
- 3 C" y0 o& `, b6 J# r
- case 0x0200:% j9 e* m) z; z
- ucKey = KEY_3;9 }2 I2 u+ @# H
- pwd_log ( " Input 3 key \r\n" );
( }$ u: F( n! f5 c- b( N5 b - break;
7 P! w+ M% D: \
2 x# S0 R# i+ u% s- case 0x0400:
7 m ]& M# L4 q5 O5 m- s$ n, S - ucKey = KEY_2;
- C' q1 t* W# o* g - pwd_log ( " Input 2 key \r\n" );! n( X K9 P( }( }5 x4 g" ?
- break;
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- case 0x0800:% l& ]6 P) u1 k% s) Y, K8 E1 P) H
- ucKey = KEY_1;
, G# m3 K* t3 V% B, J - pwd_log ( " Input 1 key \r\n" );
3 o7 ^# a0 A9 G" ~ - break;, @; P& [) W& g7 S8 p0 p5 w
7 e6 @7 b4 w2 p- default :4 U e- Q" e8 l
- pwd_log ( "Read error value = %x.\r\n", ReadVal );
6 Y. N$ \2 A H( H# J: Z - break;
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% z/ p3 M F/ r2 T3 B
4 i- V; `: s' w$ l* `' ]- BeepRunCycle ( gpBeeper, 1, 50, 10 );
5 j9 n) o, }0 F( U4 e' _4 E - return ucKey;+ e- ^+ x8 p, ]; K
- }
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复制代码 隔一段时间就执行一下,知道你按密码了。类似于刷卡板实时轮训,知道你刷卡了。9 O2 G# \( y4 s* E2 M
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是的 上面的函数嵌套了按键板的IIC读函数,同上
; S! M, Z, L0 E) }6 }- #define DEVICE_ID 0xA0
; A9 V! I c* a! _ - WORD ReadTouchKey(void)
# [$ N7 Z& R) C5 Z" y& p) F - {$ Z" p- X9 P" V# n" O8 u
- BYTE uD[4]={0x00,0x00,0x00,0x00};
% l2 v+ M; M2 N! f - uint16_t touchDataTemp = 0;6 \* f6 Z( j& G) P* y
- //LED_Backlight_Out(1);- A: ` v# ~1 [, k
- //iic_read_all(DEVICE_ID,8,4,uD);
5 L$ }% ]" X" s L: f% z - TouchKeyReadValue(&gTouchKeyI2c,0xA0,8 ,uD , 4);. ^4 A; p$ @) j! Q' a9 u( a! T' _
- touchDataTemp = uD[1];
7 y0 F) X9 S! ]8 _ - touchDataTemp <<= 8;
0 ~9 b8 ?% p: w( Q2 f z" e& B - touchDataTemp |= uD[0];
4 G$ i3 m5 U1 m1 [$ I) O - " I/ A# U2 g0 ]/ X: O
- return touchDataTemp;0 x7 N7 Y7 B3 I: D
- }
复制代码 . W) ^9 L1 t9 ^
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老大让我给产品提提建议, o; G# j# w% e4 B3 J- u5 {' z
我。。。。。) d3 z" H* F1 _' ~- k. Y
我就说我们看到的吧
编码风格# g' W$ M, c5 V L: R3 L