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oled液晶51SPI驱动程序.pdf
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
/*************************************
*◆文件名：oled.c
*
*◆介 绍：基于51单片机的OLED液晶驱动*
*程序,此版本为单文件版本, 所有函数在*
*一个文件中便于查看程序思路.
*
*◆版本号:v1.0 *
*◆编译时间：2015/8/22 *
*◆作者：ONROAD *
*◆开源共享， 共同进步。 *
*************************************/
#include
/* *全局宏**/
#define OledCmd 0
//命令标志
#define OledDat 1 //数据标志
/* *OLED引脚定义**/
sbit SCLK = P0^0; //spi时钟线，对应模块上的D0
sbit SDIN = P0^1; //spi数据线，对应模块上的D1
sbit RST = P0^2; //液晶复位
sbit DC = P0^3; //数据命令选择端， 1： 数据；0 ： 命令
/* *函数声明**/
void writeByte(unsigned char dat, unsigned char cmd);
void delay_ms(unsigned int ms);
void setOledPos(unsigned char x, unsigned char y);
void oledDisplayOn(void);
void oledDisplayOff(void);
void oledClear(void);
void showChar(unsigned char x, unsigned char y, char ch);
void oledInit(void);
void showString(unsigned char x, unsigned char y, char * str);
/* *******6x8字符**************************/
const unsigned char code 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,// -
Page: 1
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
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
Page: 2
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
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
};
/* *主函数**/
void main(void){
int i = 0;
oledInit();
while(1){
while(i < 100)
{
showChar(i, 0, 'A');
i = i + 6;
}
showString(0, 3, "Hello World!");
}
}
/* *向SSD1306写入一个字节*****
**dat : 待写入的数据********
**cmd : 数据与命令的标志位**/
void writeByte(unsigned char dat, unsigned char cmd){
unsigned char i;
if(cmd == 1){
DC = 1; //传入数据
}
else{
//传入命令
//判断传入的是数据还是命
DC = 0;
Page: 3
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
}
for(i = 0; i < 8; i++){
SCLK = 0;
if(dat & 0x80){
SDIN = 1;
}
else{
SDIN = 0;
}
SCLK = 1;
dat <<= 1;
}
DC = 1;
}
//SCLK为低电平时，准备数据
//SCLK为高，将数据传入RAM
/* *延时一段时间**/
void delay_ms(unsigned int ms)
{
unsigned int a;
while(ms)
{
a = 1800;
while(a--);
ms--;
}
return;
/* *设置坐标**
**函数名：void setOledPos(unsigend char x, unsigend char y)
**传入参数：unsigned char x -- x坐标；unsigned char y -- y坐标
************/
void setOledPos(unsigned char x, unsigned char y){
writeByte (0xb0 + y, OledCmd);
writeByte (((x & 0xf0)>>4)|0x10, OledCmd);
writeByte ((x & 0x0f)|0x01,OledCmd);
}
/* *开启OLED显示**/
void oledDisplayOn(void){
writeByte (0X8D, OledCmd); //请求设置DC命令
writeByte (0X14, OledCmd); //设置DC开启
writeByte (0XAF, OledCmd); //显示开启
/* *关闭OLED显示**/
void oledDisplayOff(void){
writeByte (0X8D, OledCmd); //请求设置DC命令
writeByte (0X10, OledCmd); //设置DC关闭
writeByte (0XAE, OledCmd); //显示关闭
}
}
}
Page: 4
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
/* *清屏函数**/
void oledClear(void){
unsigned char i, n;
for(i = 0; i < 8; i++){
for(n = 0; n < 128; n++)
writeByte(0, OledDat);
}
}
writeByte (0xb0+i, OledCmd); //设置页地址（0~7）
writeByte (0x00, OledCmd); //设置显示位置—列低地址
writeByte (0x10, OledCmd); //设置显示位置—列高地址
/* *在指定位置显示一个字符**
**函数名称：showChar(unsigned char x, unsigned char y, char ch)
**参数：unsigned char x, unsigned char y, char ch 坐标及内容
**x: 0~127; y: 0~7
**显示说明：此处显示6*8字体
*************************/
void showChar(unsigned char x, unsigned char y, char ch){
unsigned char c = 0;
unsigned char i = 1;
c = (int)ch - 32;
if(x > 127)
{
y = y + 1;
//用于存储字符对应字库序号（ASCII码 - 32）
//将ch强制转换为整型
//检索一行是否写满，若是，则换行。
}
setOledPos(x, y); //设置显示坐标
for(i = 0; i < 6; i++){
writeByte(F6x8[c][i], OledDat);
}
}
/* *从某处开始显示一串字符**
**函数名：void showString(unsigned char x, unsigned char y, char * str)
**参数： x--x坐标， y--y坐标， str--数据地址
**************************/
void showString(unsigned char x, unsigned char y, char * str){
while(*str != '\0'){
showChar(x, y, *str);
x = x + 6;
str++;
}
}
/* *OLED初始化函数**/
void oledInit(void){
RST = 1;
delay_ms(100);
RST = 0;
delay_ms(100);
RST = 1;
Page: 5
G:\MyProject\8bitMCUproject\OLED_51_4WireSPI_Driver\oled.c
writeByte (0xAE, OledCmd); //关闭液晶
writeByte (0x00, OledCmd); //设置低位列地址
writeByte (0x10, OledCmd); //设置高位列地址
writeByte (0x40, OledCmd); //--set start line address Set Mapping RAM Display St
art Line (0x00~0x3F)
writeByte (0x81, OledCmd); //--set contrast control register
writeByte (0xCF, OledCmd); // Set SEG Output Current Brightness
writeByte (0xA1, OledCmd); //--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
writeByte (0xC8, OledCmd); //Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
writeByte (0xA6, OledCmd); //--set normal display
writeByte (0xA8, OledCmd); //--set multiplex ratio(1 to 64)
writeByte (0x3f, OledCmd); //--1/64 duty
writeByte (0xD3, OledCmd); //-set display offset
Shift Mapping RAM Counter (0x
writeByte (0x00, OledCmd); //-not offset
writeByte (0xd5, OledCmd); //--set display clock divide ratio/oscillator frequenc
00~0x3F)
writeByte (0x80, OledCmd); //--set divide ratio, Set Clock as 100 Frames/Sec
writeByte (0xD9, OledCmd); //--set pre-charge period
writeByte (0xF1, OledCmd); //Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
writeByte (0xDA, OledCmd); //--set com pins hardware configuration
writeByte (0x12, OledCmd);
writeByte (0xDB, OledCmd); //--set vcomh
writeByte (0x40, OledCmd); //Set VCOM Deselect Level
writeByte (0x20, OledCmd); //-Set Page Addressing Mode (0x00/0x01/0x02)
writeByte (0x02, OledCmd);
writeByte (0x8D, OledCmd); //--set Charge Pump enable/disable
writeByte (0x14, OledCmd); //--set(0x10) disable
writeByte (0xA4, OledCmd); // Disable Entire Display On (0xa4/0xa5)
writeByte (0xA6, OledCmd); // Disable Inverse Display On (0xa6/a7)
writeByte (0xAF, OledCmd); //--turn on oled panel
writeByte (0xAF, OledCmd); //display ON
oledClear();
setOledPos(0,0);
y
}
Page: 6
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