STM32F103+OLED曲线绘制
" x7 r* N, F) Z7 I从本文的标题便能看出,此次分享的内容是以STM32F103C8T6芯片为控制核心,OLED则为0.96寸I2C通信的4针类型。其实OLED的类型不是重点,各种类型的操作基本大同小异,无非是读写通信方式的不同而已,接下来为大家详细介绍OLED屏除显示汉字、字符、数字外,绘图功能的实现,大体分为硬件连接与软件代码编写两大部分。
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0 h- v! x) m8 o( p硬件连接部分+ i0 {% m* ?0 I
0.96寸OLED屏如下图所示:
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' L1 a$ s. n& p5 ]根据上图我们可以看到,这个型号的OLED屏只有4个引脚,真正与MCU通信的信号线才2根,比较适合于通用I/O口资源较少的控制芯片。在本文中OLED与STM32F103C8T6芯片的硬件I2C相连接: PB6 – SCL;PB7 – SDA 。4 f7 Y. f2 G0 }. s) {
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软件程序部分3 P1 l2 y# J, q9 u" [
1. OLED I2C通信代码- void I2C_Configuration(void)
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- I2C_InitTypeDef I2C_InitStructure;( P0 K4 d- I3 Y3 T) D( _$ S. S' K
- GPIO_InitTypeDef GPIO_InitStructure;
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- RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);* R0 M+ A0 L$ i a g, q
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);/ Q. U1 a% M& t! f7 G: h
- ) a# C4 I9 c# P3 B: F- |$ h
- /*STM32F103C8T6芯片的硬件I2C: PB6 -- SCL; PB7 -- SDA */6 s' V) r. r* H+ L8 `4 E
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;3 v7 g; j$ s8 x
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
6 N% ]0 j K2 H" s f' @: D - GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;//I2C必须开漏输出" I) Q% y0 B* `+ T% ~
- GPIO_Init(GPIOB, &GPIO_InitStructure);
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' {8 k6 f" Q& a5 e- I2C_DeInit(I2C1);//使用I2C1
; l' t; X) E- { - I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;2 \' X) J+ A6 D( m3 w2 R7 M1 b
- I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;8 j% } p* r+ A' @- R
- I2C_InitStructure.I2C_OwnAddress1 = 0x30;//主机的I2C地址,随便写的- a3 K/ G- d, D) Y' r
- I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;' @: P4 |2 y' O% F( U: |) ^ ?
- I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;+ v! R% W, v, P3 } T, `
- I2C_InitStructure.I2C_ClockSpeed = 400000;//400K
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- I2C_Cmd(I2C1, ENABLE);
" O. A* N2 U: O - I2C_Init(I2C1, &I2C_InitStructure);
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- /**
# T o- w+ V) p# `& Y - * @brief I2C_WriteByte,向OLED寄存器地址写一个byte的数据
0 k; d& Y. ?& V& R# k8 b - * @param addr:寄存器地址
0 t6 _8 X' y, v- i5 t - * data:要写入的数据; B7 B" y& r' H: c# \
- * @retval 无
3 h# O1 W; e6 n, Y - */
9 |0 a! ~; F/ o3 F% u) t - void I2C_WriteByte(uint8_t addr,uint8_t data)9 I5 I' ~ e& s! A
- {. l/ f" Q2 b0 [
- while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));$ l( A6 y) s d2 E% _! I! f
-
9 u4 m8 P7 N2 w: Z7 f2 Z - I2C_GenerateSTART(I2C1, ENABLE);//开启I2C1
7 i7 g q& \% h' t7 s* i* @ - while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));/*EV5,主模式*/
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- I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);//器件地址 -- 默认0x78
9 X! o- I9 E% ~: {5 a8 {( ~ - while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
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- I2C_SendData(I2C1, addr);//寄存器地址
# ^3 w3 Y7 ~' P/ u( w - while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));/ M3 n3 [+ s5 b! D( ~3 d% X s
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- I2C_SendData(I2C1, data);//发送数据: O d" S2 f0 y# A" I" E
- while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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- I2C_GenerateSTOP(I2C1, ENABLE);//关闭I2C1总线
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- /**
; s/ ^/ H0 e. o7 o9 T# U - * @brief WriteCmd,向OLED写入命令8 [! b8 q6 Z- R$ J
- * @param I2C_Command:命令代码
6 b* L& o5 O/ F1 a' J - * @retval 无2 a1 u5 {, K ]* r
- */- N; r& f) [, W+ V- s" E( `
- void WriteCmd(unsigned char I2C_Command)//写命令
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- I2C_WriteByte(0x00, I2C_Command);. R1 b" M- s# x6 a- i, ?& d+ h9 u
- }
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! h" f2 ^; Q+ A- A7 @9 ]1 X- /**
- p7 D! ?0 D) P; k1 H; q - * @brief WriteDat,向OLED写入数据" H7 ] a) a: Z9 `8 h& ^
- * @param I2C_Data:数据
. [0 E7 J% w3 H/ Z( p - * @retval 无$ U$ W' g* n+ E+ i
- */
" ~+ o6 [5 r8 L! E - void WriteDat(unsigned char I2C_Data)//写数据
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- I2C_WriteByte(0x40, I2C_Data);
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. G' C) z- k; {) i$ ]) h- /**
: |1 z& a' Z4 ~2 J% E6 o - * @brief OLED_Init,初始化OLED
9 s8 g: u O& i3 f& b; b7 e/ k - * @param 无! o% c- ~$ ?6 o* D C
- * @retval 无
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- void OLED_Init(void)9 a' a$ d$ e- A$ g; d4 n
- {
; l" B; t% o1 H! B - DelayMs(100); //这里的延时很重要
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- WriteCmd(0xae);//--turn off oled panel"关闭led面板"1 m" ~+ Z6 K3 k: r
- WriteCmd(0x00);//---set low column address设置低列地址
; e# U- k& L c0 K( t- P- o - WriteCmd(0x10);//---set high column address设置高列地址0 d* w6 B! I4 r) A3 M/ g1 r
- WriteCmd(0x40);//--set start line address设置起始地址线 Set Mapping RAM Display Start Line (0x00~0x3F)
. ^& ?6 ~: ^: z$ v3 v - WriteCmd(0x81);//--set contrast control register设置对比度控制寄存器
: c1 I1 c7 N+ I4 [( | - WriteCmd(0xcf); // Set SEG Output Current Brightness设置亮度控制寄存器
; S; w5 @* g( g( X( A. T - WriteCmd(0xa1);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
9 a5 n/ ?) z q! d& f9 r2 H - WriteCmd(0xc8);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常9 _/ ]& Y! T+ x" p, v/ K, m9 w
- WriteCmd(0xa6);//--set normal display
! G4 c- o% i2 i5 K9 b - WriteCmd(0xa8);//--set multiplex ratio(1 to 64)设置多路复用; L% O3 W$ w1 \; k# y8 z8 j9 D
- WriteCmd(0x3f);//--1/64 duty
( Z# T' G' P6 h( k' u - WriteCmd(0xd3);//-set display offset Shift Mapping RAM Counter设置显示的偏移映射内存计数器 (0x00~0x3F)3 A6 G4 Z& I" T A
- WriteCmd(0x00);//-not offset取消偏移补偿
$ \6 ` O6 v; _/ C& J - WriteCmd(0xd5);//--set display clock divide ratio/oscillator frequency设置显示时钟分频比/振荡器频率+ _" U/ g. L7 f' z5 p6 p( {
- WriteCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec设置分离比例,时钟设置为100帧/秒
) R4 M7 \( y1 |- }0 H6 l - WriteCmd(0xd9);//--set pre-charge period预充电时间
j# k( }9 U( o$ |' r9 @ - WriteCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock预充电15钟及放电1时钟
) o2 A/ P" N/ X6 [3 T8 ^ - WriteCmd(0xda);//--set com pins hardware configurationCOM引脚设置硬件配置
5 L1 v) v1 J+ v9 e3 v. v - WriteCmd(0x12);
8 u2 }3 H7 W/ C0 x$ E) x - WriteCmd(0xdb);//--set vcomh设置VCOM电平 V# Q! F7 Y7 C8 m( D- H& s
- WriteCmd(0x40);//Set VCOM Deselect Level取消设置VCOM电平
! _' Y$ d9 C0 ]$ A7 Y - WriteCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)设置页面寻址模式(0x00 /头/ 0x02)
# i ]) B9 k# M* x - WriteCmd(0x02);//4 P" {6 Y2 P( c9 g/ Z+ O+ l
- WriteCmd(0x8d);//--set Charge Pump enable/disable设置电荷泵启用/禁用' k6 ~, V: o: R8 i5 x
- WriteCmd(0x14);//--set(0x10) 设为0x10失能5 X0 _( L5 Z Z p
- WriteCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)禁用整个显示1 \6 Q/ C% U9 O" O: g
- WriteCmd(0xa6);// Disable Inverse Display On (0xa6/a7) 禁用反显示
) ^+ x( M! j3 W4 L - WriteCmd(0xaf);//--turn on oled panel打开led面板6 @6 P8 M) h* v' r
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- }
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复制代码
2 C5 Q% r' `5 M% B7 e2 s2.OLED的相关操作函数
4 x L8 r; h5 v& G6 ]. w5 ]2.1.基础函数& _, T. t6 M1 M" p% a
- /**
0 Z+ Y) o9 d2 _9 b - * @brief OLED_SetPos,设置光标+ F; n, | g- I
- * @param x,光标x位置. a: R$ p. n$ U ^- x
- * y,光标y位置
& v- H9 k% q$ y$ P) f - * @retval 无3 ~! M; ~ }, S& B9 ?5 N$ ]9 a
- */ R0 w0 K( c6 c* A$ D( g
- void OLED_SetPos(unsigned char x, unsigned char y) //设置起始点坐标; c3 d" g9 }& Y' K7 d& o( P
- {
- f M. _' J! M) T - WriteCmd(0xb0+y);
! _9 r3 E& N0 P - WriteCmd(((x&0xf0)>>4)|0x10); b" `# H3 K5 \) T7 i: P0 V
- WriteCmd((x&0x0f)|0x01);
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- /**
4 H4 Q" J9 u( Q - * @brief OLED_Fill,填充整个屏幕7 W) v4 x/ T% U/ k. h
- * @param fill_Data:要填充的数据' A% i% b2 X: Z3 V# a5 T2 E
- * @retval 无. r, s( ^3 ^8 C
- */
: d) h- I* @6 g: w& K d$ @& \ T3 U3 } - void OLED_Fill(unsigned char fill_Data)//全屏填充
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h8 [$ |! j6 S# H. a& `6 p - unsigned char m,n;9 S4 v# q: r" r# w, Z% a3 c5 F
- for(m=0;m<8;m++)
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- d6 o$ \. P9 C; ] - WriteCmd(0xb0+m); //page0-page1- C! e }$ l9 S, ?- v, g
- WriteCmd(0x00); //low column start address! o: t) Z6 x+ E7 P" U! n: _9 J
- WriteCmd(0x10); //high column start address
: h6 K3 k. m4 |, u# M8 H" i. I - for(n=0;n<128;n++)% j9 Q: d! B! R' g# t3 `2 T3 x
- {
: i5 z# s7 P( H t# J4 s6 f - WriteDat(fill_Data);5 k# w' W; F3 v# G. S( e7 H
- }
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- }
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# u7 P0 p" E! l$ A# A& Q- /**! F" ~ L6 o) S5 s0 }
- * @brief OLED_CLS,清屏3 c! ?( w4 v- H9 Q( k
- * @param 无! F1 J7 O" t( U+ R5 A
- * @retval 无
0 e. l0 Z; i( k* Q - */
) z7 Z# W' `" `9 L d6 ]) y - void OLED_CLS(void)//清屏
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- OLED_Fill(0x00);
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- * U9 c# U+ c4 R6 |& h+ Z
- /**3 h& A: v1 b, k8 Q7 }% u
- * @brief OLED_ON,将OLED从休眠中唤醒
" C# n D! ~; ^3 O3 }7 U - * @param 无6 A7 _2 n* j* ? G& p
- * @retval 无3 N( H5 P0 F m* D6 R+ F5 m
- */
$ a. T, t, }3 D& \3 z - void OLED_ON(void)
6 f) D) p$ X8 Q6 t a - {
1 l- K0 K4 `4 O& c% L - WriteCmd(0X8D); //设置电荷泵
0 T* @2 B/ ^7 ~4 r. W; ~ - WriteCmd(0X14); //开启电荷泵
! J& G& s/ I* J) s+ f" g - WriteCmd(0XAF); //OLED唤醒
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- /**: [- P2 c. s" n& b
- * @brief OLED_OFF,让OLED休眠 -- 休眠模式下,OLED功耗不到10uA
& K: @" s2 Q' Q0 o& _ - * @param 无) N- \1 N% n3 t2 I- p5 m0 V
- * @retval 无
- C- b" a4 V" a' s& n9 y! l( S - */. m: E3 t L* l8 i
- void OLED_OFF(void)
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- WriteCmd(0X8D); //设置电荷泵! z' w' |7 d4 \; b; d( K+ X0 g
- WriteCmd(0X10); //关闭电荷泵
3 n* {1 X$ n" S) ~! f - WriteCmd(0XAE); //OLED休眠5 _; \/ p- M: G- @
- }
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- /**
$ N* S [% d: f& V% J - * @brief OLED_ShowStr,显示codetab.h中的ASCII字符,有6*8和8*16可选择3 |+ c4 D F, U
- * @param x,y : 起始点坐标(x:0~127, y:0~7);
- m9 K- p {$ T* g# s, ] H - * ch[] :- 要显示的字符串;
% a, I- V2 h: @7 A' r - * TextSize : 字符大小(1:6*8 ; 2:8*16)
8 v, J( @1 d# O - * @retval 无
5 `1 Y* A' a3 G1 r! R - */; V! X) L+ i: ?( G
- void OLED_ShowStr(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize)) a }0 c: \5 D i7 o/ Q
- {' X- w- P9 B- j8 l3 `$ }& \5 ~; \
- unsigned char c = 0,i = 0,j = 0;
) @* h& t. b" A" S$ [' _) y2 N - switch(TextSize)
8 ?- S7 D& m: k9 p4 B - {
# G# _' @+ X$ \; M2 z - case 1:; {. K, D4 ~ [& U2 ^( A& r
- {6 _0 n, o1 y) g& f$ t/ L) H
- while(ch[j] != '\0')# Z& f1 S% Q: F0 b$ f& d
- {
, Q6 s+ g: r6 s2 g9 E3 X& X - c = ch[j] - 32;
! `2 @" o$ u. R" N4 r - if(x > 126)
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- x = 0;
$ A6 O- Z# [/ F4 |$ E. J, x - y++;. `3 L5 C8 X/ O. f
- }
8 }; l; A6 w' H# i, x* ?% p - OLED_SetPos(x,y);( y# |& [# a H8 ~( I% u& r+ Q
- for(i=0;i<6;i++): J' B- f" v2 b
- WriteDat(F6x8[c][i]);+ e q) p6 n/ o' {) }
- x += 6;- b% \( s) h9 t% d
- j++;0 i( o# i# H" L' _) g
- }
" w1 t# y3 W; C& _ - }break;% u- }4 K e6 i4 l
- case 2:
" R- W& b* Q( @( l$ z- T - {
' d: I m" E4 \% K- | - while(ch[j] != '\0')
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- c = ch[j] - 32;$ V# B8 m W5 N) H7 B u
- if(x > 120)
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- x = 0;
9 C8 ] g0 j5 R! S. x1 _) S, M - y++;: o+ e& D+ _4 } `- G# f
- }
) [3 o; S S9 E9 G - OLED_SetPos(x,y);
2 M- Y& |* I# a, k - for(i=0;i<8;i++)
6 S- f/ t& R* N/ i! M - WriteDat(F8X16[c*16+i]);
6 I& e" h8 O9 b) v# N, r. T; B5 h - OLED_SetPos(x,y+1);2 j, E' f! H- ~; w6 [) F3 M1 M& ]
- for(i=0;i<8;i++)
, u5 \" K( G3 b$ A; o% D: ` - WriteDat(F8X16[c*16+i+8]);
/ J- a6 O, L; X9 X) }% M; ] - x += 8;
y7 O$ J/ F: t" ~: G! A+ S H - j++;
0 K; `) d$ d5 k* W& o - }+ z/ R9 y3 `, S: y( D9 h+ @9 Q0 x
- }break;& i1 U- y# c1 }0 B, }" D' Q
- }
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' p [5 U/ q- |# A# a; V- /**
! d0 Q' s- z E& P- _/ O - * @brief OLED_ShowCN,显示codetab.h中的汉字,16*16点阵" V; ^, e! ~2 |2 M/ j& o6 V1 c
- * @param x,y: 起始点坐标(x:0~127, y:0~7); , s: O. Z$ z! X; S
- * N:汉字在codetab.h中的索引6 }7 r, U, Q6 ~
- * @retval 无
$ q2 B& |% S2 S' J - */
: U. Y6 E7 d9 O% ?' F! u - void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N)
; c- k+ t$ V7 g5 L# k1 p' R - {
1 O! z: A; w8 O: b- n2 k4 |+ H9 b - unsigned char wm=0;0 x* o* o& C y2 j7 l
- unsigned int adder=32*N;* s. X2 _/ X" y. p$ v3 H( t$ j% T
- OLED_SetPos(x , y);
2 h" A; r) E9 |+ p7 A" z - for(wm = 0;wm < 16;wm++)1 `8 e4 ~2 C2 c7 L, J
- {
9 q2 L$ G% P2 T - WriteDat(F16x16[adder]);9 k3 t9 u+ } x3 ^
- adder += 1;& N/ g/ f; K7 I5 X5 ?( T
- }7 u* `1 x0 S8 v6 g7 d
- OLED_SetPos(x,y + 1);8 S( Q6 e% A2 D/ t3 A
- for(wm = 0;wm < 16;wm++)
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- WriteDat(F16x16[adder]);' @% \+ _# z* K* g/ V" E
- adder += 1;# \- L. \1 O( j2 z* C) G$ |
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- }# Q- w' F0 i/ _( z
- 6 f; ?1 l P' ]# L; R" l
- 0 b- S! u9 n- ]. c
- 0 W5 s- V1 c) T0 B
- /**' W& F6 a$ }# P8 T9 ]2 S( n# f9 E5 g: f
- * @brief OLED_DrawBMP,显示BMP位图
' `- ^+ c( z! b& ^" @ - * @param x0,y0 :起始点坐标(x0:0~127, y0:0~7);- N9 l N' M& J
- * x1,y1 : 起点对角线(结束点)的坐标(x1:1~128,y1:1~8)
}0 c/ E: D+ D: J - * @retval 无" N; Q4 e2 q) C
- */
" ^ ?3 H. o2 d% Q2 |) n# H+ {$ o - void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[])
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$ X- w, L! U- W' b7 `7 n5 N1 d - unsigned int j=0;
/ ~- K! y0 _' O( r - unsigned char x,y;
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- if(y1%8==0). x! t# |7 |9 h$ w. E- M- l
- y = y1/8;
) f/ J$ `2 c5 n: N - else
. i4 `( f* l8 ~/ u2 p& n, O; N - y = y1/8 + 1;
1 }3 U+ e3 {; A - for(y=y0;y<y1;y++)
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- OLED_SetPos(x0,y);7 w% w% H" A# ^3 Y- K" j- p
- for(x=x0;x<x1;x++)
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' ]; U" P+ z @: d H - WriteDat(BMP[j++]);; w7 p; _% P! O. u6 X& z) N) P- Q8 z
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4 p) y, S4 O5 N8 i5 E2.2.描点函数
: P% R _8 L4 ~0 G) w入口参数:. f# v/ X& W. c# U; i
x:点的x坐标;* m: |0 w7 R1 [
y:点的y坐标;
& A- [% p" x, V7 Dt:点的状态;“0”代表暗,“1”代表亮3 Q p/ \6 W. W3 Q( m* H
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- void OLED_DrawDot(unsigned char x,unsigned char y,unsigned char t)7 q( ?/ S A% Y Z4 U
- {
9 Z" V8 r9 t+ q - unsigned char pos,bx,temp=0;8 }0 i: E; Z C/ K7 b2 ?) `1 T k
- if(x>127||y>63) return;
+ j1 L6 v: W' }8 J8 l- H( U" V! R - pos=(y)/8;
$ g1 L+ c! k9 D6 A$ w - bx=y%8;2 \4 Q* Z: G: c$ }
- temp=1<<(bx);; ~0 y" {- y0 V; `
- if(t) OLED_GRAM[x][pos]|=temp;* E" Z( g# J3 _- q% |0 ]
- else OLED_GRAM[x][pos]&=~temp;
7 j/ L9 G( O& E - OLED_Refresh_Gram(); ) i5 s' `; Z* s* f' B, n
- }
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2.3.连线函数
- a2 ~! G; f. V入口参数:
" ]. _: Z$ a. b% A' V) ux1:起点的x坐标;
3 i, k6 R3 D+ l! a3 f- W0 N5 y4 Vy1:起点的y坐标;
+ ~6 `) F$ `) G1 L1 `! Z Vx2:终点的x坐标;
8 t) u$ a C& g: u$ O$ \2 cy2:终点的y坐标;6 m1 u- }, m, ? _% u" u6 G
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- void LCD_DrawLine(unsigned int x1, unsigned int y1, unsigned int x2,unsigned int y2)
7 l5 T v' r' _" A8 d# K - {
$ C3 z: O6 I9 y3 {. C - unsigned int t; 1 _- y! l; ]% r5 ~( P+ Y
- int xerr=0,yerr=0,delta_x,delta_y,distance; ; X! B$ r- y! _5 {
- int incx,incy,uRow,uCol;
3 @1 ~. D) T0 l1 e, J. Y - delta_x=x2-x1; //计算坐标增量 6 v, i4 y/ y5 Z; F( R9 c
- delta_y=y2-y1;
1 ~+ y8 {6 Y6 N/ @$ j3 F - uRow=x1;
; s2 B( c9 M7 U" j2 P5 u - uCol=y1;
0 }) N$ h3 s1 } - if(delta_x>0)incx=1; //设置单步方向 5 F0 P& H) I5 u: K3 }: }0 n
- else if(delta_x==0)incx=0;//垂直线 9 X+ H7 n! V* H: s
- else {incx=-1;delta_x=-delta_x;}
6 f! @ A' \- c4 c- X2 D- I - if(delta_y>0)incy=1; ) u# t0 I7 n+ \
- else if(delta_y==0)incy=0;//水平线 1 w s3 b% v& y3 ]' t/ _: o
- else{incy=-1;delta_y=-delta_y;} 6 V& \: a# N3 l' J1 k
- if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴
: v. y2 I) B: ?2 I - else distance=delta_y; 6 D2 O3 v; D6 l( n; T- S
- for(t=0;t<=distance+1;t++ )//画线输出 0 C& e3 ^9 x1 n9 A* u- o
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- OLED_DrawDot(uRow,uCol,1);//画点 % _3 Z! Q5 |; r8 ~7 J3 z* e
- xerr+=delta_x ; : g+ w# ^2 v. F1 U# w& O8 [6 o# _( h
- yerr+=delta_y ; p% `- E k( D7 T; u ], |
- if(xerr>distance)
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- xerr-=distance;
O+ k1 ~% j7 q y' o; { - uRow+=incx;
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- if(yerr>distance) 7 }* d% n* P! r8 B
- {
, Y3 f/ W5 M5 e6 v& V* _ - yerr-=distance; 8 R/ r' ]* M7 b9 L! V) K
- uCol+=incy; " p% A# {% R" r& F7 W9 w
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- } - {) N3 }# B9 S, q: A
- }
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+ w* Z4 V; f h6 `; Q! D3 D最后实际运行效果图如下:
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