1、HT1621电路分析 HT1621为32×4即128点内存映像LCD驱动器,包含内嵌的32×4位显示RAM内存和时基发生器以及WDT看门狗定时器. HT1621驱动电路如下图所示: * s2 E5 G. p& j! ^7 y- k* M6 m
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图1 与单片机相连接控制的有9脚CS,3脚WR,12脚DATA,其功能描述如下表。 8 J! Q7 a# u4 {* k
h' Z* q0 p) H# X4 D图2 2、字符显示原理 液晶管点亮和熄灭原理分别为在对应的RAM地址中写1和写0.首先需要清楚所驱动控制的液晶的COM-SEG对应关系,然后需要了解HT1621的32×4RAM地址映射。 例如要控制的液晶的装脚成品图部分如下: * T8 G& u! c# H3 D+ t5 @5 B
' _, ~7 F0 P7 D2 S* w* ^图3 着重看一个液晶数码管,我们了解原理就行。可以看到图3中是第2个液晶数码管,有7段,分别为A,B,C,D,E,F,G。也就分别为下面COM\SEG地址对应关系图中的2A,2B,2C,2D,2E,2F,2G。 液晶的显示字符的部分COM公共端输出口和SEG段输出口的分布如下表所示,同理我们可以看到例如:2D对应(SEG5,COM0),2E对应(SEG5,COM1),2F对应(SEG5,COM2),2A对应(SEG5,COM3),2C对应(SEG4,COM1),2G对应(SEG4,COM2),2B对应(SEG4,COM3)。 ' ^- e4 q6 z) c! z
. K7 t$ R0 b* I& @ @" I- Q$ z图4 搞清楚我们要控制的对象之后那, HT1621的RAM 地址映射如下图所示: & Z3 @. ~8 N% d) o! f/ W# G
, R: o' m1 ^: \2 r" @/ b图5 可以清楚的看到要控制液晶段对应SEG号作为6位地址,COM号对应作为4位数据写入,此时注意4位数据的高低位。写数据到RAM命令格式为:101+6位RAM地址+4位数据,其中RAM地址为SEG序号. 例如我们在图3的第二个液晶数码管上显示数字,首先我们根据图3得到地址映射关系,先写入地址SEG4中的四位数据(COM3,COM2,COM1,COM0),再写如地址SEG5中的四位数据(COM3,COM2,COM1,COM0),对应关系如下: SEG4 | SEG5 | COM3 | COM2 | COM1 | COM0 | COM3 | COM2 | COM1 | COM0 | 2B | 2G | 2C | T10 | 2A | 2F | 2E | 2D | 9 u! C, k+ P. w/ \; P9 ]6 x
所以如果在图3中显示“5”,则在显示的液晶段对应地址上写1,不显示写0,如下图所示。所以SEG4地址应写入的数据为0110 ,SEG5地址应写入数据1101。
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图6 3、显示的保持 写数据过程需要保证写前无关位数据的保持,因此在单片机程序中开辟32×4数组作为虚拟ARM,存储写前LCD显示数据.通过与清零,或置位操作实现,例如6位地址Address当前显示的数据为Data_last .若Xi(i=0,1,2,3) 位需要保持,则Xi为1,否则Xi为0.写入的数据为Data_now,变换公式为:
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4、程序 主要的程序编写流程如下:
, ?' d% y: I; q8 d5 j+ Z& @' R图7 程序的参考步骤:①Display_Wendu_1②write_addr_dat_n_wendu③write_mode④write_address⑤write_data_4bit,其中Lcdram数组为建立的虚拟数组。
3 t% ~/ g4 j' p' A5 I- unsigned char Lcdram[32]=6 F/ T, E# A6 o h& I
- {
( q) Z( p; Z0 [4 S1 z' h - 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/ a2 Q& x. S, B# b. o - 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,4 B6 ?6 f, j7 a) \6 h: h9 ~
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, L" N4 q! f6 I1 D; [. n
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
0 ?* t9 m; F ]; B6 I - };
5 v+ L/ \/ l8 W3 {5 W% o - # E. O! ]1 e$ Z x& C) Z
- const unsigned char Wendu[] = //温度0-9
3 T v1 E' C$ R# S+ I - {
6 H1 s. L1 t6 l7 \' j0 [ - 0X5F, 0X50, 0X3D, 0X79, 0X72, 0X6B, 0X6F, 0X51, 0X7F, 0X7B" a9 T" C/ }2 g/ c7 v
- };" f9 a! G* ? M# z5 C1 }* Z
- ///////////////////////////////////////////////////驱动函数
: E- s; n8 h. u - /*/ R3 l# }6 }0 K0 ^. ~& ^; i; y) a
- * LCD 模式写入! B; I. j3 B! R. Q
- * 入口:MODE :COM(命令模式) DAT(数据模式)
; N4 \5 s. K: s: Q, L0 O8 F& N - * 出口:void
% |" F& O4 a3 }. u6 W - */4 O- ^- p! f9 q& q4 G/ Q U
- void write_mode(unsigned char MODE) //写入模式,数据or命令
% v% g: F: E5 D, y- |+ d9 T - {
# K! D" f! f |7 T9 k2 Y% m - GPIO_ResetBits(GPIOB, HT1621_WR); // RW = 0;
6 d5 ?+ ?& e7 x' p - delay_us(10);
4 U* D0 x' z- d6 G! W$ Z( N3 e: D - GPIO_SetBits(GPIOB, HT1621_DATA); // DA = 1;- p, P# M8 z6 h4 D1 h2 [
- GPIO_SetBits(GPIOB, HT1621_WR); // RW = 1;
: K! f) j0 b1 c* E7 ]+ s( M# t - delay_us(10);* {! o8 C+ h! U( b4 ]
- + _ F3 q! `7 f
- GPIO_ResetBits(GPIOB, HT1621_WR); // RW = 0;+ g% A6 m ?; @/ S f o+ r" H6 W5 u
- delay_us(10);$ h' x2 ^% F( m4 _+ X' L) B1 o
- GPIO_ResetBits(GPIOB, HT1621_DATA); // DA = 0;
7 v8 i& G" x5 K* G+ K - GPIO_SetBits(GPIOB, HT1621_WR); // RW = 1;0 b8 k6 J2 M" W! A4 q8 x4 p
- delay_us(10);
' S% p; c. Y# j1 z' I5 d- l& C, j
0 Z, R0 I5 J4 _* a- GPIO_ResetBits(GPIOB, HT1621_WR); // RW = 0;7 r& f) ]& ^- G( T0 _
- delay_us(10);% q# r8 N" O# I9 Y0 N I3 i
; w+ E# [+ l, T- if (0 == MODE)
1 z% [8 U, B2 d1 }/ b( \" d: M - {
* b- N& T; _; B - GPIO_ResetBits(GPIOB, HT1621_DATA); // DA = 0;
6 ]- d2 K9 d$ z' ^0 R+ D2 T& Z, p% c - }
! w* h2 k! o( ^3 z - else: |+ c! `- W+ B0 e$ r
- {
^* Q% y, {! l8 K3 \0 q" Y/ e - GPIO_SetBits(GPIOB, HT1621_DATA); // DA = 1;
/ b+ `* B" ~4 ^ - }
% B9 I8 p5 T/ o) e1 I/ C - delay_us(10);
) \" I7 i/ j6 l1 H7 z - GPIO_SetBits(GPIOB, HT1621_WR); // RW = 1;4 [9 m1 }/ D: h
- delay_us(10);" Z n& H1 w9 r A, }
- }
9 S g2 N2 B& W0 ]& a - / ~' Y. h5 D0 `9 F1 i. r
- /*
" A1 N% e/ C" t1 f$ L B - * LCD 命令写入函数
5 n7 E/ L e3 ] - * 入口:cbyte ,控制命令字8 |6 }7 }' w9 g
- * 出口:void
X' |. N+ u( N4 R4 f4 q1 E - */+ I$ G5 w$ @1 V) |! l
- void write_command(unsigned char Cbyte)
5 D7 E: I7 j" F7 ?5 c/ J/ t - {# E9 |8 ?& Y* j) E. }7 X
- unsigned char i = 0;
" Q2 ^# `4 d$ I# P - 8 B) U, d# w p1 W; b
- for (i = 0; i < 8; i++)
& o- M/ H# y1 v; P2 n* l! g& p - {9 s6 r& U/ x1 e) s$ y' w
- GPIO_ResetBits(GPIOB, HT1621_WR);4 T4 x2 A$ m( f' H: @: y6 A/ \
- if ((Cbyte >> (7 - i)) & 0x01)
2 e. S" m: j" ` M - {+ m5 p6 y; }7 Y/ W& i3 h, M
- GPIO_SetBits(GPIOB, HT1621_DATA);
1 u, o; M$ S. @. N# w - }( {* o/ K6 _& `$ {+ k
- else
' p/ m. X9 q2 Y0 ]+ V K; z. B - {
" G! W' P4 C) o# K$ N: } - GPIO_ResetBits(GPIOB, HT1621_DATA);
- m$ H/ i6 _& |: l1 A# K- z+ g9 @ - }& ~! i3 L' ~% r! ` m
- delay_us(10);
2 J9 l9 g/ E* w* M& y& w - GPIO_SetBits(GPIOB, HT1621_WR);9 y+ M+ g# y' _3 b
- delay_us(10);
, w# P5 T$ V4 l3 } - }
4 \0 b; T( v0 _) L - GPIO_ResetBits(GPIOB, HT1621_WR);
6 ~* I7 r: }3 u0 x2 ` - delay_us(10);
6 d/ Y. j( \7 F: A8 N" ^ - GPIO_ResetBits(GPIOB, HT1621_DATA);
" B9 q. o% ~5 x( l6 F7 ? - GPIO_SetBits(GPIOB, HT1621_WR);
8 i' A3 S" N \2 J/ p& Z2 L+ S( R - delay_us(10);
5 K% h; a6 A$ `0 J3 t! Z - }8 I6 L& h- k" h) s4 ]1 Z/ e
7 }5 r! r+ W$ \% `( Y- /*
. h' O% c8 M0 U& t# J0 y - * LCD 地址写入函数9 Y0 S0 T1 b8 v5 k( B9 c
- * 入口:cbyte,地址
6 Q& k# ^6 O0 e) j. P8 k4 t- l - * 出口:void
, [7 t8 B- e2 ?% e7 ~+ f/ O" ]% T - */4 x" F$ Q: i# d0 F+ C
- void write_address(unsigned char Abyte)
( z: e% R | R) U - {
3 Z7 v$ B& Q0 ?) t - unsigned char i = 0;5 @+ }. |% i- N1 y6 w! J: @3 P
- Abyte = Abyte << 2;( X2 `1 r( l0 A6 F3 z
- ( A5 l: |8 W3 E; V3 L/ A, ?$ f
- for (i = 0; i < 6; i++)1 V7 C, v% W; L0 v; D# J
- {
3 k1 k* o' J% W! |& M. R9 G - GPIO_ResetBits(GPIOB, HT1621_WR);# L$ M- M. {: y, m: ?
- //delay_us(10);" e# X8 C+ T3 b1 r/ W5 n# F7 G
- if ((Abyte >> (7 - i)) & 0x01)
) M% Z6 Z5 C: Z - {& C' A" O: T. V! `
- GPIO_SetBits(GPIOB, HT1621_DATA);8 |9 k6 D( p, M( e8 n5 u; Q& J
- }
2 F% c0 v9 \& g - else9 t S( R6 ]+ R4 L; n7 S9 I* i
- {
# R2 F: V* v6 M, _ - GPIO_ResetBits(GPIOB, HT1621_DATA);
) H4 S( g! ^# P6 g) Q. g+ }3 x - }
5 r! T& {4 C- w+ O. w+ o0 M - delay_us(10);
! a" a. p" e/ F+ y% u8 G - GPIO_SetBits(GPIOB, HT1621_WR);
; E/ K1 o5 x p, C/ W - delay_us(10);
0 ?' }; Z \: W! i# ]! v. c% z! U - }
) Z- P/ y# b, H. x$ { - - f; p4 e2 W6 M- p+ ]: r5 f5 @8 e
- }: a$ k. W3 X M9 D& P
- ( i9 V8 R' l& U8 Y; g
- /*, i5 X6 q& L$ l+ m9 n" M
- * LCD 数据写入函数
8 i* O: m0 K& R0 U8 j/ I' t; k - * 入口:Dbyte,数据
* R# U9 f( R4 f& R8 h$ K - * 出口:void
8 H: Y: A! o, u# B& J - */7 N3 N1 T+ ~0 J7 s D |
- void write_data_8bit(unsigned char Dbyte)) L% o9 }$ z8 L
- {
b0 i, x9 h- c( ?6 H. W - int i = 0;) Q% y& G7 S4 x) [$ W, A4 [2 J: Q
- / Z( B5 N- ^6 v. b( x- j
- for (i = 0; i < 8; i++)! { i7 F# q$ O/ H r
- {
; ]) ~* {$ P3 {4 s" N - GPIO_ResetBits(GPIOB, HT1621_WR);' {- W; B( ?3 w' R8 H* G
- delay_us(10);
3 o7 ]8 {5 i$ s; \% v2 R( i8 ~ - if ((Dbyte >> (7 - i)) & 0x01)
7 U7 N; @+ z. d o9 Z - {$ w1 h( ?& n* f
- GPIO_SetBits(GPIOB, HT1621_DATA);# s8 ^6 U$ O8 c. p. u
- }2 _. G' ~- B. h! m! B
- else
, r) B/ n; O5 O/ S - {
) J8 X- J: i5 k; r) U2 W+ T - GPIO_ResetBits(GPIOB, HT1621_DATA);! B, O: [1 q. `9 T9 P* w( m+ y
- }. G s" u0 n% e) n
- delay_us(10);$ R3 g \( P A+ F7 y2 ?
- GPIO_SetBits(GPIOB, HT1621_WR);
: @$ }5 H/ e: d3 @/ m% G" M - delay_us(10);
9 r( }, a0 ?* { - }
5 I& X2 b& e6 _2 h9 x8 ?: l; { - }
* ^9 J% \: c* M5 S+ @+ n - * @! K9 n$ Q! A. u$ ? X; Z% p( s
- void write_data_4bit(unsigned char Dbyte)2 O, ?- }9 u# N/ _" L
- {
+ {1 o7 B6 k7 a: I - int i = 0;( k" h+ ~4 Q" {; u# \$ |
9 v/ F2 [& o0 \# c6 L- for (i = 0; i < 4; i++)
% s9 a: P+ a. t - {6 e6 E* B0 \# y2 a9 @
- GPIO_ResetBits(GPIOB, HT1621_WR);
- ~$ r8 L$ Q6 R3 P( J) X6 c) M - //delay_us(10);- n2 C8 J' g, Q: ?9 Q
- if ((Dbyte >> (3 - i)) & 0x01)
* O- j/ V$ Y/ q" P: v% Q3 U - {
& u* Q7 }4 }+ h: a6 k7 U( M6 T - GPIO_SetBits(GPIOB, HT1621_DATA);# q) h q+ \/ E! l" V
- }
) }: U+ |) j5 Y: u6 T. S: d - else
8 D4 p+ }$ i- }1 m6 _7 R( ^' W1 B - {+ f3 M; t3 M5 F$ S, ^: T
- GPIO_ResetBits(GPIOB, HT1621_DATA);+ ]' D3 g" p7 n Q! K" v" I
- }3 @( D" r, F1 N: T
- delay_us(10);1 _, f" P$ ]$ Q- D
- GPIO_SetBits(GPIOB, HT1621_WR);9 C% s" g$ X: C5 i
- delay_us(10);
) Y2 e8 Z1 s, j - }$ U' P: |; `6 o# ], {: B7 ~3 z$ [/ b
- }3 b8 X, P7 b1 O& L0 X3 D6 t1 `# p
9 C3 \& y; O1 L4 f* g' R
& r, I- E* i' Y- o- `- , r: ~/ P0 @& y- p+ ]3 N
- //1621初始化
/ ]- ]$ C- O3 I! t( y. T9 a: W; t - void ht1621_init(void)- b/ `5 ]8 `$ C: D" L
- {
+ i* M" x4 g* D, P) l - GPIO_InitTypeDef GPIO_InitStructure;// declare the structure
1 C# c/ C% M* F6 ~8 q/ ~% V& w* g - GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);( Z8 s+ P3 M' F4 [3 Z$ e/ Y
7 P* b; m! t6 B, M- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE);
) p( |4 T7 [4 N# Q+ O8 ? - memset(&GPIO_InitStructure, 0, sizeof(GPIO_InitTypeDef));
2 l2 z- _2 F& u( x" @9 _ - GPIO_InitStructure.GPIO_Pin = HT1621_WR | HT1621_DATA ;//| HT1621_IRQ! Q! n5 c3 Y* ^- ?7 v/ T
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;' x0 M, ~+ P M9 h& U( }' r
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;. t- A8 \( k) k- m/ s7 Q
- GPIO_Init(GPIOB, &GPIO_InitStructure);* W/ P( J; g# _+ X1 |
4 _1 V6 v0 l! a, V6 c- memset(&GPIO_InitStructure, 0, sizeof(GPIO_InitTypeDef));
9 A/ |; V/ U6 I, |# u" R - GPIO_InitStructure.GPIO_Pin = HT1621_CS ;//| HT1621_IRQ
+ ~! A5 {2 X( ^4 O8 { - GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
a( s/ ~$ l5 l V$ H' r0 G - GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
1 t( O# l4 x+ Z; k0 M/ m. [ - GPIO_Init(GPIOA, &GPIO_InitStructure);
0 P7 l9 }9 Y0 a( t& }. o - * }7 V/ Y' o' U
- }
% u" ]" r8 @/ s1 w2 R - ' Z8 o4 s: a- l+ t. \( c
- /*
. Z7 C7 V+ V! o Q9 F% t+ ` - * LCD 初始化,对lcd自身做初始化设置
8 s' D1 N) n# z, }/ M$ U: k - * 入口:void
3 b0 C1 ?3 [$ E- I" e* F - * 出口:void8 B6 |" M5 s/ Y% `* W6 k
- */4 O f6 Q$ ^9 u& E
- void lcd_init(void)
+ F+ K1 d# C p0 Z) k. K* B - {
9 I' n. q2 @& K9 } - //////////////////////////////////////////////////////
r% p" q/ _' v' N7 b' h a7 l - GPIO_SetBits(GPIOA, HT1621_CS);: t [6 V) S# I% E1 E1 ^( `* Z
- GPIO_SetBits(GPIOB, HT1621_WR);
6 L8 U% `/ v( i. N: b, l- w - GPIO_SetBits(GPIOB, HT1621_DATA);
' w, p+ X2 H0 s1 r3 H - for (ii=0;ii<10000;ii++)
+ {' N, r! B1 u" P/ Z2 f# C - {for(j=10;j>0;j--);}' u1 a0 v" a }7 i8 e, z+ G3 ^
- //////////////////////////////////////////////////////
: q8 n. h, S5 o. U4 j' \ - GPIO_ResetBits(GPIOA, HT1621_CS); //CS = 0;
' @2 A5 R- V# D/ q; `! F$ N - //delay_us(10);& b z: e. |4 M) \$ c0 u
- for (ii=0;ii<10000;ii++)
; Q; _5 `6 N& E6 g# a - {for(j=10;j>0;j--);}
* G$ V5 @( J2 Z; X8 p2 n+ ~" l - write_mode(COMMAND); //命令模式4 z& b4 R( x* `& q
- write_command(0x01); //Enable System
. Z& ?# T# r' c1 n; S6 i - write_command(0x03); //Enable Bias+ r, ]; S, u s- M
- write_command(0x04); //Disable Timer! Y! T- W k# M3 Y, }* U" v B0 U
- write_command(0x05); //Disable WDT3 }& |- `0 Y; z v1 @9 E7 J
- write_command(0x08); //Tone OFF
2 Z) Q* ^- J* X7 h - write_command(0x18); //on-chip RC震荡
4 ?* Z. p, u+ _) p. i% d - write_command(0x29); //1/4Duty 1/3Bias0 }9 [' O; f* I" @) R: ^: a
- write_command(0x80); //Disable IRQ
- h+ p! f( X: ? - write_command(0x40); //Tone Frequency 4kHZ
: K5 n5 S) K7 @. \! k P+ ^; P - write_command(0xE3); //Normal Mode O, T: X4 o5 y% m; x7 b
- 3 f0 r/ n8 D/ t& O
- GPIO_SetBits(GPIOA, HT1621_CS); //CS = 1;% E! v2 D/ n* Z7 g5 v
- }0 o5 e) A/ _6 s" j
- ) {6 T$ o0 {- h' \
- /*& [* |( j# Q; z
- * LCD 清屏函数
1 |9 U& a4 M0 k. D. K - * 入口:void
5 l3 i9 V( B# K6 a. [ - * 出口:void- `3 K, k2 T% ^# g. Z* o
- */5 }* a! X. G, Q* \
- void lcd_clr(void)" F \7 p9 k5 S* @% s
- {
; G& ]* E7 i* J7 ] - write_addr_dat_n(0x0, 0x00, 32);//15
! b- _8 F9 u6 d* E - }+ j: F7 ?$ H3 |2 o
- //用于温度区域写数据
) j% D7 h B ] - void write_addr_dat_n_wendu(unsigned char _addr, unsigned char _dat, unsigned char n): X1 M0 e% \/ K7 N8 z* Z$ w% K. N1 l! a
- {6 b( w* Q+ z. }/ o: a3 U: [. B
# z6 R* _! c5 r" q' {- unsigned char i = 0;
! X9 \. B. k. G9 U/ n$ n0 b* H - unsigned char _dat_temp1,_dat_temp2;
$ \1 E( r6 W. V( p1 h - , R+ l: q# ~$ Z' o# H) R: h& U5 x' c
- //WriteLcdram(_addr, _dat);
0 L, g4 P* w0 `3 r) T3 J% n) T - / ?. Z2 T. _0 N2 n; y
- . c' w+ M& A: `, d
- & \, |$ }+ } l2 U
- GPIO_ResetBits(GPIOA, HT1621_CS); // CS = 0;6 |/ e+ V2 H* P3 S2 ~' x( w
- write_mode(DAT);
: b. ?1 y4 M1 G3 ?0 N$ y5 i
1 _& o( G5 g6 B# Y- if(Lcdram[_addr]==0x00)# Q( `- b, A3 N3 e7 Q5 c
- {' K; j, }! I! q
- WriteLcdram(_addr, _dat);
* @2 E9 v. t) l - }* _8 c9 H0 l# Q4 a, K
- if((_addr%2)==0)5 u" b9 ?! h( Y: r
- {+ V1 d- I4 h4 p3 v# C
- _dat_temp1=Lcdram[_addr];; C) g1 v l& B0 l* ~) G; E6 e
- _dat_temp2=(_dat_temp1&0x08)|_dat;, I2 s k( W* a5 }# t: Y+ M
- ' d; Y5 E$ x* |% Y+ h- a; V
- write_address(_addr);: Z, c1 u7 L2 a- V' L
- for (i = 0; i < n; i++)0 I" f: g$ G) H1 d: o4 N+ W6 E: s
- {- m: i+ s4 t+ z* m
- write_data_4bit(_dat_temp2);
6 |. a/ }2 K: x* f' j% f - }
: S# ~ ]1 w* L/ X - GPIO_SetBits(GPIOA, HT1621_CS); //CS = 1;! X; I3 Q% o4 f0 x. B8 ~+ X! U
! f' O# E' g4 Y4 K0 a5 Y- }; L' L6 a5 c! D
- else if((_addr%2)!=0)
4 Z* P4 b! `0 W - {
, }. c0 k. S. I5 c- A - write_address(_addr);
- c4 _ k5 H4 T, [* j- B9 s - for (i = 0; i < n; i++)
" G5 }% L" L1 g* P1 C' N, B - {" ~/ n, m2 T9 P5 o- D& {. C6 a& ?/ ^
- write_data_4bit(_dat);
2 ?7 e0 h4 b2 ?- h - }
1 } [7 }% s" v3 b: u8 Q% m - GPIO_SetBits(GPIOA, HT1621_CS);, w, u' e5 ]5 R- Z
- }
- Q, t7 _5 A; C* K l
* L7 ^/ R: ^' ]# e6 Y, x: E+ o) G- WriteLcdram(_addr, _dat_temp2);
5 {; E% ~3 r4 w% @8 g - }: J7 }6 U& y) P1 T; S
0 I2 ?8 R$ q5 _; ]- //用于湿度区域写数据1 D& }4 l. u* F8 E* h; B
- void write_addr_dat_n_shidu(unsigned char _addr, unsigned char _dat, unsigned char n)
* l/ s. U* Y* O L8 C) v0 S - {
?0 R) |1 t# A6 Y. r. A! n' b- b
& A, G5 y, p: P2 N- unsigned char i = 0;
3 D# L$ a: r3 I4 Y6 V+ k6 A$ I - unsigned char _dat_temp1,_dat_temp2;
# h% |" f& g, t/ w8 o$ V: A2 V2 m
6 A3 d* s9 {" |- //WriteLcdram(_addr, _dat);$ L6 m' Y7 z, q, f1 k+ I! `" l0 o
- : k/ q3 g- y& {% x7 m7 L
6 y% n" k+ n3 s, e3 S& Y- 4 \6 ]( H) w# }4 @6 M4 O. B h1 z
- GPIO_ResetBits(GPIOA, HT1621_CS); // CS = 0;( n: s; k ~4 ]& l# [
- write_mode(DAT);
0 ?& w- B. [+ O: W
, A% \9 d; u, Q2 R: D- L- if(Lcdram[_addr]==0x00)
- H# O3 R* G o8 [ - {
' v4 u- C! s: }6 f/ o* G - WriteLcdram(_addr, _dat);
# a7 k- \9 O, q- ~3 Y: a - }
4 U# z# y$ O0 I7 o8 Q$ q+ j - if((_addr%2)==0)1 x6 @; c; k& S8 @3 e
- {5 p, _! w! @* z. D h2 z$ x+ z4 D
- _dat_temp1=Lcdram[_addr];
6 S, a# k% d9 y% U - _dat_temp2=(_dat_temp1&0x01)|_dat;
5 D3 a8 c: r1 U5 W, Y2 u. P+ ^ - + H$ W! r2 Z0 T# O
- write_address(_addr);
% l: ]- W' g* d# N8 A - for (i = 0; i < n; i++)
+ c0 K+ O& L+ G2 O - {0 W) \5 K8 K3 {( _6 Z$ T
- write_data_4bit(_dat_temp2); k3 @* T- X0 T/ `0 b
- }
$ h( h9 H6 U) m3 ? - GPIO_SetBits(GPIOA, HT1621_CS); //CS = 1;# i. K5 i. K; v4 q: q3 a, d" G
- 8 m# {* N8 S" T0 E7 V
- }
- b1 t: r/ Y9 ]2 _5 d* L - else if((_addr%2)!=0)
! n. i% y0 ~ g - {1 {6 ~3 k( ]. L+ K6 h
- write_address(_addr);8 ~* z2 `8 ^& g* Y$ S
- for (i = 0; i < n; i++)$ D5 R$ P3 x6 K1 [) W$ X* c
- {
! ]4 \; Z3 g- U0 ^8 z - write_data_4bit(_dat);! f8 R8 s! o2 H+ q
- }
' `' t, n9 r# f Z - GPIO_SetBits(GPIOA, HT1621_CS);
. a% d& d7 s( v# S5 y V - }' s& t. Y9 F% i4 A! p" v
- ( R- ^) k" O( k; B2 h9 V) B) d
- WriteLcdram(_addr, _dat_temp2);
% N: a7 J# x" j, ~# D! v3 p0 P+ n) ` - }7 j: a( ^* ]4 g- }, W
9 g) b) R1 r8 V1 k- * j f; r1 e+ \% F# K3 B1 \: S" y
- //用于底部数字写数据
5 U! a8 h( s3 Y+ K) k9 N) D - void write_addr_dat_n_others(unsigned char _addr, unsigned char _dat, unsigned char n) X; V4 W5 n0 {* }" ?3 T1 `
- {
# q' }! g; r8 H, @! w6 h - 6 q7 W* ~3 X4 J |5 T2 r
- unsigned char i = 0;
* ^ \; f4 N6 N1 n - unsigned char _dat_temp1,_dat_temp2;
3 U& D0 u$ p9 P$ V) s; q+ U - GPIO_ResetBits(GPIOA, HT1621_CS); // CS = 0;
( x: ]3 ?0 o6 [+ ^% w - write_mode(DAT);6 V8 i3 K0 n# {- T; H
- 3 M+ [; v& M6 ~5 e" G2 B4 F/ P
- if(Lcdram[_addr]==0x00)
: _5 g1 Z+ t1 x+ B - {
& t u4 z* P3 x t! O) e, p - WriteLcdram(_addr, _dat);
0 ?2 Z [! A5 r( f! O
2 V# f. q [9 V( @- }# ~7 v7 o' @+ Y2 W. X& K
- if((_addr%2)==0)
/ P- L1 q+ V7 T7 G$ D/ Q2 f6 n - {* j8 d* P! |' r8 @* n) ?% b3 U4 ]
- _dat_temp1=Lcdram[_addr];* T# {7 P2 D1 n! c/ B
- _dat_temp2=(_dat_temp1&0x01)|_dat;
$ g( v5 x! i* P) q" Q+ _! ?
]$ O! C P- [% Y6 |4 N- write_address(_addr);4 M7 p7 D. G. m+ \/ O
- for (i = 0; i < n; i++)
/ n( p' `" c/ l6 b* _+ k* X3 y - {
8 j6 J( Y# i) s( u6 Z" [: Q% Y' `) L - write_data_4bit(_dat_temp2);
: r" \' z4 f( T5 N1 W7 W6 k - }
7 p, T2 e3 H9 D0 | U4 q/ Y - GPIO_SetBits(GPIOA, HT1621_CS); //CS = 1;
2 p* e- X6 t8 i5 M) G* k - ! M: ?. z, P# \
- }3 T5 l) @* |, L1 Y
- else if((_addr%2)!=0)7 u. K8 n2 y- G4 u
- { H& t" l0 i- |0 p9 s$ @& v- T; [6 \% _
- write_address(_addr);
9 {" Z1 w- W7 R1 { - for (i = 0; i < n; i++)
$ D2 i3 S2 g! O& Q k - {
& M! C; S3 m0 }' | - write_data_4bit(_dat);% U0 V+ Q% C/ d5 n/ F
- }" S1 o: V/ K$ _ ?( j
- GPIO_SetBits(GPIOA, HT1621_CS);& k, Y/ y9 L m8 H0 [$ L3 G) Q5 S C
- }
9 @ t% U2 C4 [ - ' ^ U2 B. \3 w( g2 {6 Y8 y. g/ k
- //WriteLcdram(_addr, _dat);
& H ~3 t! ?& Z - WriteLcdram(_addr, _dat_temp2);
! Q* n& Q! ]) [, D - }
' W- D5 N4 \9 l5 k7 o- P - ) E& _, Z, d- u. |
- //用于字符写数据+ X2 K1 f( U, I) t
- void write_addr_dat_n_char(unsigned char _addr, unsigned char _dat, unsigned char state)
# J# `; }: \- k* \3 O - {8 d: A/ c8 T5 P$ o5 N2 k( u- k% I
6 I0 l$ Z! s4 G1 Q- unsigned char i = 0;" w4 p+ i3 G* f
- unsigned char _dat_temp1,_dat_temp2;
+ J# l( P4 ~2 o& T+ ] - 4 ^2 K8 X1 c$ Y4 E3 R
5 V! C: D9 ~3 |) t2 `- GPIO_ResetBits(GPIOA, HT1621_CS); // CS = 0;
& p8 \" A; _8 `3 b1 Z Z - write_mode(DAT);
8 @+ E+ a# \0 f6 o
! {2 X" M, z; h( ?; F0 n- _dat_temp1=Lcdram[_addr];1 u8 r3 n0 H) ]( c; y8 `
- if(state==1)
* l. r8 m* k* L$ `1 s! B - {
. \6 U4 M# Z: Q, Z+ `! w - - v% V2 \: q* w+ W5 M
- _dat_temp2=(_dat_temp1|_dat);' ], e. p2 j/ D' [5 _2 e$ l
- }0 H& n; I& D" A* O7 {4 k
- else if(state==0)
) ^2 T. A0 b" M - {) q) o/ R( H; O+ [) o; U
- _dat_temp2=(_dat_temp1&(~_dat));4 v6 k. G$ Y2 I) G* T
- }
. E6 p {0 C9 M O; n9 g4 l - write_address(_addr);
% ~& f$ ?% O# L; H7 j- z, B
. D+ o4 G$ R3 [8 b9 V5 r o- for (i = 0; i < 1; i++)
' \2 I' c6 ^3 Z0 E5 }4 _ - {
5 _6 t3 v1 X9 A5 i |& H/ H: b - write_data_4bit(_dat_temp2);
- x" |. U, Y6 B4 }4 e0 G5 e0 p - }
4 M4 K* k/ A; d( D: b( E5 h' ^ - GPIO_SetBits(GPIOA, HT1621_CS); //CS = 1;% f. ]9 B6 B6 N* U
- WriteLcdram(_addr, _dat_temp2);+ G5 v" B2 R( i, s
- * C* Q. W! S* W9 e6 S6 ~; s
1 r( C1 @3 ~: z( a! z! S- . n. s# {7 S! L- E
7 S: S* o% D3 W( m" {- s" d0 R2 n- }! Y! ], I. t$ g. i' ?
- //显示温度6 T2 |7 Q. u+ x) a0 ~, O+ M
- //入口:pos,显示位置,地址0、2、4分别为从右到左的三个数字
O& K! n' B7 k2 f - // num:要显示的一位数- f+ n/ r2 f. }, t0 G' q
- void Display_Wendu_1(unsigned char add, unsigned char num )
O# B( Q( P6 }, D, V+ p1 A% j - {
; z' T7 r' t* c* R3 W3 Z - unsigned char n,i,j;
" u. v: n6 {+ V7 M, w% t' U - n=getChr_Wendu(num);
- D' H/ f% s5 V) v6 H$ p - i=(n&0xF0)>>4;
$ C7 T3 Y' w9 m - j=n&0x0F;
) j8 x: k8 E* d - write_addr_dat_n_wendu(add,i,1);
' F5 p! R9 N+ E3 r! i - write_addr_dat_n_wendu(add+1,j,1);! l: U, W, f3 U# d& a# ~' |. M
- ) ~; H6 d8 b7 f% O* a
- }
& ^8 c2 p5 G1 c7 L - ( l: B9 j( D+ [2 L+ }: q9 H9 k
- 9 t* R8 l+ m& Y- g5 l/ V7 E
- //温度数据转换,lcd.c内部使用
6 L4 U- P0 A: q4 d2 J }2 M - unsigned char getChr_Wendu(unsigned char c)3 p, b) G! T- k5 u0 i$ x
- {! I) X# I8 P7 h
- unsigned char i;
2 R% h. m8 h6 \ R9 O - for ( i = 0; i < 10; ++i)
6 X& K" x. v x$ p) u6 Z9 L" V+ D% | - {. k) K5 ]7 r, k* u. y, w
- if (c == i)
; U1 x' d! }& a) m - { J8 h5 k0 y& _; M, C" m$ B
- return Wendu[i];# Z/ i+ s7 t5 b0 P( r9 p
- }+ S, @1 Y% q! h+ e i
- }
' [$ E4 o4 @- B) @ - }+ I* X" b k) k$ w
- 2 [% B4 B2 @. t- Z
- //更新lcdram数组
' K. n: y6 R8 F# @8 F - void WriteLcdram(unsigned char add, unsigned char data), p" D/ p/ v( Z1 Q0 b9 C- o
- {, C; w: T' F# t9 s
" k. `& `, }3 `9 B8 ?- Lcdram[add]=data;- |$ V$ o( K1 T- L9 y& H
0 _, S9 n9 @/ Y& L u5 v F* q7 H- }
复制代码
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4 I( y! H0 ]+ f/ a! g7 K |
ST有自带段码液晶驱动型号吗?