【开源项目】点亮OLED，不仅仅是LiteOS

原先用LiteOS点亮过OLED，这次用HarmonyOS点亮OLED

 

1、在applications/sample/wifi-iot/app下新建myshow文件夹，myshow文件夹下新建myshow.c、oled_ssd1306.c、oled_ssd1306.h、BUILD.gn四个文件。

 

 

oled_ssd1306.c为：

 

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#include 

#include 

#include "ohos_types.h"

#include "iot_errno.h"

#include "iot_i2c.h"

#include "oled_ssd1306.h"

/************************************6*8的点阵************************************/

static unsigned char F6x8[][6] =

{

    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp

    { 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 }, // !

    { 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 }, // "

    { 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 }, // #

    { 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 }, // $

    { 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 }, // %

    { 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 }, // &

    { 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 }, // '

    { 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 }, // (

    { 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 }, // )

    { 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 }, // *

    { 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 }, // +

    { 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 }, // ,

    { 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 }, // -

    { 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 }, // .

    { 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 }, // /

    { 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E }, // 0

    { 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 }, // 1

    { 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 }, // 2

    { 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 }, // 3

    { 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 }, // 4

    { 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 }, // 5

    { 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 }, // 6

    { 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 }, // 7

    { 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 }, // 8

    { 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E }, // 9

    { 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 }, // :

    { 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 }, // ;

    { 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 }, // <

    { 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 }, // =

    { 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 }, // >

    { 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 }, // ?

    { 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E }, // @

    { 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C }, // A

    { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 }, // B

    { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 }, // C

    { 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C }, // D

    { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 }, // E

    { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 }, // F

    { 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A }, // G

    { 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F }, // H

    { 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 }, // I

    { 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 }, // J

    { 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 }, // K

    { 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 }, // L

    { 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F }, // M

    { 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F }, // N

    { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E }, // O

    { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 }, // P

    { 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E }, // Q

    { 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 }, // R

    { 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 }, // S

    { 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 }, // T

    { 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F }, // U

    { 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F }, // V

    { 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F }, // W

    { 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 }, // X

    { 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 }, // Y

    { 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 }, // Z

    { 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 }, // [

    { 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55 }, // 55

    { 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 }, // ]

    { 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 }, // ^

    { 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 }, // _

    { 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 }, // '

    { 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 }, // a

    { 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 }, // b

    { 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 }, // c

    { 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F }, // d

    { 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 }, // e

    { 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 }, // f

    { 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C }, // g

    { 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 }, // h

    { 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 }, // i

    { 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 }, // j

    { 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 }, // k

    { 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 }, // l

    { 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 }, // m

    { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 }, // n

    { 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 }, // o

    { 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 }, // p

    { 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC }, // q

    { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 }, // r

    { 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 }, // s

    { 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 }, // t

    { 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C }, // u

    { 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C }, // v

    { 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C }, // w

    { 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 }, // x

    { 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C }, // y

    { 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 }, // z

    { 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }, // horiz lines

};

/****************************************8*16的点阵************************************/

static const unsigned char F8X16[]=

{

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0

    0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1

    0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2

    0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3

    0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4

    0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5

    0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6

    0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7

    0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8

    0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9

    0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10

    0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14

    0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15

    0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16

    0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17

    0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18

    0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19

    0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20

    0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21

    0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22

    0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23

    0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24

    0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25

    0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26

    0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27

    0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28

    0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29

    0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30

    0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31

    0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32

    0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33

    0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34

    0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35

    0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36

    0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37

    0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38

    0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39

    0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40

    0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41

    0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42

    0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43

    0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44

    0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45

    0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46

    0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47

    0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48

    0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49

    0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50

    0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51

    0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52

    0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53

    0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54

    0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55

    0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56

    0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57

    0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58

    0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59

    0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,// 60

    0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61

    0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63

    0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64

    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65

    0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66

    0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67

    0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68

    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69

    0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70

    0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71

    0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72

    0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73

    0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74

    0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75

    0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76

    0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77

    0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78

    0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79

    0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80

    0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81

    0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82

    0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83

    0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84

    0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85

    0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86

    0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87

    0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88

    0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89

    0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90

    0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91

    0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92

    0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93

    0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94

};

/*---6*6 点阵*/

static const unsigned char F6X6[]=

{

    0x00,0x1E,0x1E,0x1E,0x1E,0x00, //■

};

/*---8*8 点阵*/

static const unsigned char F8X8[]=

{

   //0x00,0x7E,0x7E,0x7E,0x7E,0x7E,0x7E,0x00,

   0x7E,0x7E,0x7E,0x7E,0x7E,0x7E,0x7E,0x00, //■

};

#define OLED_I2C_IDX        0

#define OLED_I2C_BAUDRATE   (400*1000)  // 400k

#define OLED_I2C_ADDR       0x78        // 默认地址为 0x78

#define OLED_I2C_CMD        0x00        // 0000 0000       写命令

#define OLED_I2C_DATA       0x40        // 0100 0000(0x40) 写数据

#define OLED_WIDTH          (128)

#define SNAKE_CLEAR_BLOCK  0x00

static uint32 OledWriteByte(uint8 regAddr, uint8 byte)

{

  // TODO: Check SSD1306 DataSheet if must write by byte.

    uint8 buffer[] = {regAddr, byte};

  return IoTI2cWrite(OLED_I2C_IDX, OLED_I2C_ADDR, buffer, ARRAY_SIZE(buffer));

}

/**

 * [url=home.php?mod=space&uid=2666770]@Brief[/url] Write a command byte to OLED device.

 *

 * [url=home.php?mod=space&uid=3142012]@param[/url] cmd the commnad byte to be writen.

 * [url=home.php?mod=space&uid=1141835]@Return[/url] Returns {[url=home.php?mod=space&uid=41289]@Link[/url] WIFI_IOT_SUCCESS} if the operation is successful;

 * returns an error code defined in {@link wifiiot_errno.h} otherwise.

 */

static uint32 OledWriteCmd(uint8 cmd)

{

    return OledWriteByte(OLED_I2C_CMD, cmd);

}

/**

 * @brief Write a data byte to OLED device.

 *

 * @param cmd the data byte to be writen.

 * @return Returns {@link WIFI_IOT_SUCCESS} if the operation is successful;

 * returns an error code defined in {@link wifiiot_errno.h} otherwise.

 */

static uint32 OledWriteData(uint8 data)

{

  return OledWriteByte(OLED_I2C_DATA, data);

}

/**

 * @brief ssd1306 OLED Initialize.

 */

uint32 OledInit(void)

{

    static const uint8 initCmds[] = {

        0xAE, // --display off

        0x00, // ---set low column address

        0x10, // ---set high column address

        0x40, // --set start line address

        0xB0, // --set page address

        0x81, // contract control

        0xFF, // --128

        0xA1, // set segment remap

        0xA6, // --normal / reverse

        0xA8, // --set multiplex ratio(1 to 64)

        0x3F, // --1/32 duty

        0xC8, // Com scan direction

        0xD3, // -set display offset

        0x00, //

        0xD5, // set osc division

        0x80, //

        0xD8, // set area color mode off

        0x05, //

        0xD9, // Set Pre-Charge Period

        0xF1, //

        0xDA, // set com pin configuartion

        0x12, //

        0xDB, // set Vcomh

        0x30, //

        0x8D, // set charge pump enable

        0x14, //

        0xAF, // --turn on oled panel

    };

    IoTI2cInit(OLED_I2C_IDX, OLED_I2C_BAUDRATE);

  for (uint32 i = 0; i < ARRAY_SIZE(initCmds); i++) {

        uint32 status = OledWriteCmd(initCmds[i]);

        if (status != IOT_SUCCESS) {

            return status;

        }

    }

    return IOT_SUCCESS;

}

void OledSetPosition(uint8 x, uint8 y)

{

    OledWriteCmd(0xb0 + y);

    OledWriteCmd(((x & 0xf0) >> 4) | 0x10);

    OledWriteCmd(x & 0x0f);

}

void OledFillScreen(uint8 fillData)

{

    uint8 m = 0;

    uint8 n = 0;

    for (m=0; m < 8; m++) {

        OledWriteCmd(0xb0 + m);

        OledWriteCmd(0x00);

        OledWriteCmd(0x10);

        for (n=0; n < 128; n++) {

            OledWriteData(fillData);

        }

    }

}

/**

 * @brief 8*16 typeface

 * @param x: write positon start from x axis 

 * @param y: write positon start from y axis

 * @param ch: write data

 * @param font: selected font

 */

void OledShowChar(uint8 x, uint8 y, uint8 ch, Font font)

{        

  uint8 c = 0;

    uint8 i = 0;

    c = ch - ' '; //得到偏移后的值  

    if (x > OLED_WIDTH - 1) {

        x = 0;

        y = y + 2;

    }

    if (font == FONT8x16) {

        OledSetPosition(x, y);  

        for (i = 0; i < 8; i++){

            OledWriteData(F8X16[c*16 + i]);

        }

        OledSetPosition(x, y+1);

        for (i = 0; i < 8; i++) {

            OledWriteData(F8X16[c*16 + i + 8]);

        }

    }else {

        OledSetPosition(x, y);

        for (i = 0; i < 6; i++) {

            OledWriteData(F6x8[c][i]);

        }

    }

}

void OledShowString(uint8 x, uint8 y, const char* str, Font font)

{

  uint8 j = 0;

    if (str == NULL) {

        printf("param is NULL,Please check!!!

");

        return;

    }

  while (str[j]) {

        OledShowChar(x, y, str[j], font);

        x += 8;

        if (x > 120)

        {

            x = 0;

            y += 2;

        }

        j++;

  }

}

 

oled_ssd1306.h：

 

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#ifndef OLED_SSD1306_H

#define OLED_SSD1306_H

#include "ohos_types.h"

/**

 * @brief ssd1306 OLED Initialize.

 */

uint32 OledInit(void);

/**

 * @brief Set cursor position

 *

 * @param x the horizontal posistion of cursor

 * @param y the vertical position of cursor 

 * @return Returns {@link WIFI_IOT_SUCCESS} if the operation is successful;

 * returns an error code defined in {@link wifiiot_errno.h} otherwise.

 */

void OledSetPosition(uint8 x, uint8 y);

void OledFillScreen(uint8 fillData);

enum Font {

    FONT6x8 = 1,

    FONT8x16

};

typedef enum Font Font;

enum DisOnOff{

  DISOFF,

  DISON

};

typedef enum DisOnOff DisOnOff;

void OledShowChar(uint8 x, uint8 y, uint8 ch, Font font);

void OledShowString(uint8 x, uint8 y, const char* str, Font font);

void PrintBlock(uint8 x0, uint8 y0);

void DisplayBlock(uint8 x0, uint8 y0);

#endif // OLED_SSD1306_H

 

myshow.c：

 

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#include 

#include 

#include "ohos_init.h"

#include "cmsis_os2.h"

#include "iot_gpio.h"

#include "oled_ssd1306.h"

void mymain(void)

{

    OledInit();

    OledFillScreen(0x00);  

    OledShowString(26, 2, "HELLO WORLD!", FONT8x16);

}

SYS_RUN(mymain);

 

myshow/BUILD.gn：

 

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static_library("myshow") {

  sources = [

    "oled_ssd1306.c",

    "myshow.c",

  ]

  include_dirs = [

      "//utils/native/lite/include",

      "//kernel/liteos_m/kal/cmsis",

      "//base/iot_hardware/peripheral/interfaces/kits",

  ]

}

 

然后修改app/BUILD.gn：

 

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import("//build/lite/config/component/lite_component.gni")

lite_component("app") {

    features = [

        # "demo_snake",

        "myshow:myshow",

    ]

    deps = []

}

 

保存后编译：

 

 

然后把生成的Hi3861_wifiiot_app_allinone.bin用HiBurn工具下载到开发板：

 

 

下载完成后OLED显示如下图：