OLED屏是一种小巧的显示器件,特别是I2C接口的OLED 屏更能节省I/O口资源。本次使用的是一款0.91'的单色OLED屏,它比常规的OLED屏要长且窄,故更适于显示信息和参数,也更适于用在便携装置上。 1. OLED屏显示 1)OLED屏与NV32F100的连接关系如下: SCL --- PA5 SDA --- PA6 2)为进行显示定义引脚输出高低电平的语句为: #defineOLED_SCLK_Clr() GPIO_PinClear(GPIO_PTE1); #defineOLED_SCLK_Set() GPIO_PinSet(GPIO_PTE1); ' F0 V3 l5 }! E$ t R# j
#defineOLED_SDIN_Clr() GPIO_PinClear(GPIO_PTE0); #defineOLED_SDIN_Set() GPIO_PinSet(GPIO_PTE0);
! V8 ~* P- {% f! N, n3)OLED屏初始化函数为: - void OLED_Init(void)
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) j: X/ D" u7 ]; _$ [% I# R% G - GPIO_InitTypeDef GPIO_InitStruct;
0 v# _$ I9 b- E! C! t* I6 M( C - __HAL_RCC_GPIOA_CLK_ENABLE();
% N' u6 ~+ [3 o. ? - GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6; ) ] O4 L3 r$ e h+ ?) r( m+ x
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
" O! o7 L$ E7 M! H0 r- e% R - GPIO_InitStruct.Pull = GPIO_PULLUP;
& _ q) k/ s' U' [7 Z - GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
7 ]7 } T8 F" v - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);' a( C9 \$ t- Z# [
- OLED_SCLK_Set();8 f; D7 e: M! C& P b
- OLED_SDIN_Set(); ; [0 B2 W8 m% E8 y) F
- Delay_1ms(800);( @1 g- B3 x& @ G4 B3 ?1 M) b
- OLED_WR_Byte(0xAE,OLED_CMD);//--display off4 j1 b7 u ]4 K
- OLED_WR_Byte(0x40,OLED_CMD);//--set start line address ' K- Z, T9 X2 @( H
- OLED_WR_Byte(0xB0,OLED_CMD);//--set page address Q0 W2 k- t* ~0 ]; d( M; J0 J( @8 T, P
- OLED_WR_Byte(0x81,OLED_CMD); // contract control
0 |' m0 F* L0 d+ f w) @ - OLED_WR_Byte(0xFF,OLED_CMD);//--128
+ E, a+ r% v" d- m - OLED_WR_Byte(0xA1,OLED_CMD);//set segment remap
7 t* X# Z9 I6 k - OLED_WR_Byte(0xA6,OLED_CMD);//--normal / reverse" m1 L5 a2 ^4 l( H* H
- OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
+ P+ Z" v3 p8 M' e7 y7 v - OLED_WR_Byte(0x1F,OLED_CMD);//--1/32 duty, u3 S/ m+ Q; j5 a% q6 j
- OLED_WR_Byte(0xC8,OLED_CMD);//Com scan direction
7 W/ g% [4 g8 R: k% U# x* M - OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset
, u; ~ |9 S3 Y# x - OLED_WR_Byte(0x00,OLED_CMD);//
' N6 P6 n @4 Q T6 t2 a0 Q# v - OLED_WR_Byte(0xD5,OLED_CMD);//set osc division
& q1 [! u0 y2 u9 R+ L6 K6 ] - OLED_WR_Byte(0xF0,OLED_CMD);//
0 @6 N- [' J* B! L9 e- ? - OLED_WR_Byte(0xD9,OLED_CMD);//Set Pre-Charge Period
) U) X1 h& P/ P+ G - OLED_WR_Byte(0x22,OLED_CMD);//
5 ~' n& W- S( m$ D- A - OLED_WR_Byte(0xDA,OLED_CMD);//set com pin configuartion/ g( B& s( O8 u! H" \; M* j
- OLED_WR_Byte(0x02,OLED_CMD);//
4 d, R3 W8 A& K; f e2 h, S - OLED_WR_Byte(0xDB,OLED_CMD);//set Vcomh/ O* s6 m8 |. p/ Q
- OLED_WR_Byte(0x49,OLED_CMD);//+ r* F1 ~; C3 L
- OLED_WR_Byte(0x8D,OLED_CMD);//set charge pump enable* D2 ^7 p3 m6 }3 p# W0 p6 N
- OLED_WR_Byte(0x14,OLED_CMD);//# ?* y+ A8 `7 Y& c) z: a# p; A# p
- OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
: S6 Z5 A6 X/ |* e8 E( x& \# T+ ^* [ - OLED_Clear();
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4)汉字显示函数为: - void OLED_ShowCHinese(unsigned char x,unsigned char y,unsigned char no)
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- unsigned char t,adder=0;# d' B+ K# [* g
- OLED_Set_Pos(x,y); 9 G$ v# r: s( O
- for(t=0;t<16;t++)
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- OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);* i3 p. b+ {6 C& G# k( a: k1 x5 ]
- adder+=1;1 `+ C9 T) |) x7 h ^3 z
- }
/ k/ \8 D+ F& J# w2 q' @- P( w0 R - OLED_Set_Pos(x,y+1);
e1 u2 Z8 `. e$ ~) C( { - for(t=0;t<16;t++)+ H" A o0 d" w0 U" ^4 |2 E
- {
/ m- Z: X4 G; Y+ ^: l5 P, J) k - OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);- H! E: m u1 H4 l B- k
- adder+=1;1 P4 n% Z5 q! a; z
- } 5 v; `7 b6 E9 Q3 ]% z
- }
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2. 字模提取 为了显示汉字,需要提前相应的字模,以PCtoLCD2002字模提取软件为例,在提取前需按图1所示来进行设置。 图1 格式设置 ! Q, l3 i4 ~- @! ]9 E/ @ q; H; \' z
1)录入需显示的内容,如图2所示。 图2 输入提取内容 6 J0 U0 q) u3 t, K0 F; p
2)编写显示函数,其内容为: - void cd()
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- OLED_ShowCHinese(18,0,0); 0 w# r; q( u6 y& \
- OLED_ShowCHinese(36,0,1);) o. {7 Q# |4 c
- OLED_ShowCHinese(54,0,2);
- K8 _" z4 S- p2 e( I' m, H" H5 g - OLED_ShowCHinese(72,0,3);
% l" |6 ]: J0 K) | - OLED_ShowCHinese(90,0,4);. ~; O9 v8 k+ g$ c% |. G' t
-
$ q! V( o( x: f* k1 Y) I& k5 o - OLED_ShowCHinese(18,2,5); " t+ x2 H/ m: H* @: e4 t$ x* x6 F' c
- OLED_ShowCHinese(36,2,6);
/ ?% r/ U* `8 y' D$ B& H9 K - OLED_ShowCHinese(54,2,7);
. y. U% _0 C( [ - OLED_ShowCHinese(72,2,8);
% M- Z( ]9 J5 F: z9 s - OLED_ShowCHinese(90,2,9);
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3)编写主程序,其代码如下: - int main(void)
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- HAL_Init();
, E* }) @1 _. T - /* Configure the system clock to 80 MHz */
+ m7 |2 D, r0 h8 L: ]0 ? - SystemClock_Config();& h$ U6 R9 G5 z: A2 T. v
- OLED_Init(); 6 F( { ?1 J# n5 y
- OLED_Clear();, h0 _+ g% R/ v4 j
- cd();
6 r2 R1 k( t. ?: @! r - while (1);; A6 Z4 U f" F t
- }
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4)下载并运行后,其效果如图3所示。 图3 显示效果( Q0 a. v o5 v2 o" `$ c# I! m! t3 M" m9 ~
6 ~4 L, } O3 _2 C, p, ^工程代码:
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