在大多数STM32的OLED驱动例程中，都给出了相关的软件驱动和硬件设计方法，对具体SSD1306的接线以及IO口的初始化未给出详细的说明
OLED.H文件
#include "oled.h"
#include "stdlib.h"
#include "sys.h"
#include "delay.h"
//////////////////////////////////////////////////////////////////////////////////
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//STM32开发板
//SSD1306 OLED 驱动代码
//驱动方式:4线SPI串口
//版权所有，盗版必究。
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))
#define MEM_ADDR(addr)*((volatile unsigned long*)(addr))
#define BIT_ADDR(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))
//IO口地址映射
#define GPIOA_ODR_Addr (GPIOA_BASE+12) //0x4001080C
#define GPIOB_ODR_Addr (GPIOB_BASE+12) //0x40010C0C
#define GPIOC_ODR_Addr (GPIOC_BASE+12) //0x4001100C
#define GPIOD_ODR_Addr (GPIOD_BASE+12) //0x4001140C
#define GPIOE_ODR_Addr (GPIOE_BASE+12) //0x4001180C
#define GPIOF_ODR_Addr (GPIOF_BASE+12) //0x40011A0C
#define GPIOG_ODR_Addr (GPIOG_BASE+12) //0x40011E0C
#define GPIOA_IDR_Addr (GPIOA_BASE+8) //0x40010808
#define GPIOB_IDR_Addr (GPIOB_BASE+8) //0x40010C08
#define GPIOC_IDR_Addr (GPIOC_BASE+8) //0x40011008
#define GPIOD_IDR_Addr (GPIOD_BASE+8) //0x40011408
#define GPIOE_IDR_Addr (GPIOE_BASE+8) //0x40011808
#define GPIOF_IDR_Addr (GPIOF_BASE+8) //0x40011A08
#define GPIOG_IDR_Addr (GPIOG_BASE+8) //0x40011E08
//IO口操作,只对单一的IO口!
//确保n的值小于16!
#define PAout(n) BIT_ADDR(GPIOA_ODR_Addr,n)//输出
#define PAin(n) BIT_ADDR(GPIOA_IDR_Addr,n)//输入
#define PBout(n) BIT_ADDR(GPIOB_ODR_Addr,n)//输出
#define PBin(n) BIT_ADDR(GPIOB_IDR_Addr,n)//输入
#define PCout(n) BIT_ADDR(GPIOC_ODR_Addr,n)//输出
#define PCin(n) BIT_ADDR(GPIOC_IDR_Addr,n)//输入
#define PDout(n) BIT_ADDR(GPIOD_ODR_Addr,n)//输出
#define PDin(n) BIT_ADDR(GPIOD_IDR_Addr,n)//输入
#define PEout(n) BIT_ADDR(GPIOE_ODR_Addr,n)//输出
#define PEin(n) BIT_ADDR(GPIOE_IDR_Addr,n)//输入
#define PFout(n) BIT_ADDR(GPIOF_ODR_Addr,n)//输出
#define PFin(n) BIT_ADDR(GPIOF_IDR_Addr,n)//输入
#define PGout(n) BIT_ADDR(GPIOG_ODR_Addr,n)//输出
#define PGin(n) BIT_ADDR(GPIOG_IDR_Addr,n)//输入
//接线方式如下：当然，VCC和GND必须连接，VCC建议连接3.3V
#define LCD_SCL PBout(8) //时钟 D0（SCLK）
#define LCD_SDA PBout(9) //D1（SDA） 数据
#define LCD_RST PDout(6) //复位RST
#define LCD_DCPBout(5) //DC数据/命令控制
extern void LCD_DLY_ms(unsigned int ms);
extern void LCD_WrDat(unsigned char dat);
extern void LCD_Set_Pos(unsigned char x, unsigned char y);
extern void LCD_Fill(unsigned char bmp_dat);
extern void LCD_CLS(void);
extern void LCD_P6x8Str(unsigned char x,unsigned chary,unsigned char ch[]);
extern void LCD_P8x16Str(unsigned char x,unsigned chary,unsigned char ch[]);
extern void LCD_P16x16Ch(unsigned char x,unsigned chary,unsigned charN);
extern void Draw_BMP(unsigned char x0,unsigned chary0,unsigned char x1,unsigned chary1,unsigned char BMP[]);
extern void OLED_Init(void);
OLED.C文件
#define XLevelL0x00
#define XLevelH0x10
#define XLevel ((XLevelH&0x0F)*16+XLevelL)
#define Max_Column 128
#define Max_Row64
#define Brightness 0xCF
#define X_WIDTH 128
#define Y_WIDTH 64
/*********************LCD 延时1ms************************************/
void LCD_DLY_ms(unsigned int ms)
{
unsigned int a;
while(ms)
{
a=1800;
while(a--);
ms--;
}
}
/*********************LCD写数据************************************/
void LCD_WrDat(unsigned char dat)
{
unsigned char i=8;
LCD_DC=1;
for(i=0;i<8;i++) //发送一个八位数据
{
LCD_SCL=0;
if(dat&0x80) LCD_SDA=1;
else LCD_SDA=0;
LCD_SCL=1;
dat<<=1;
}
}
/*********************LCD写命令************************************/
void LCD_WrCmd(unsigned char cmd)
{
unsigned char i=8;
LCD_DC=0;
for(i=0;i<8;i++) //发送一个八位数据
{
LCD_SCL=0;
if(cmd&0x80)LCD_SDA=1;
else LCD_SDA=0;
LCD_SCL=1;
cmd<<=1;;
}
LCD_DC = 1;
}
/*********************LCD 设置坐标************************************/
void LCD_Set_Pos(unsigned char x, unsigned char y)
{
LCD_WrCmd(0xb0+y);
LCD_WrCmd(((x&0xf0)>>4)|0x10);
LCD_WrCmd((x&0x0f)|0x01);
}
/*********************LCD全屏************************************/
void LCD_Fill(unsigned char bmp_dat)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
LCD_WrCmd(0xb0+y);
LCD_WrCmd(0x01);
LCD_WrCmd(0x10);
for(x=0;x<X_WIDTH;x++)
{
LCD_WrDat(bmp_dat);
}
}
}
/*********************LCD复位************************************/
void LCD_CLS(void)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
LCD_WrCmd(0xb0+y);
LCD_WrCmd(0x01);
LCD_WrCmd(0x10);
for(x=0;x<X_WIDTH;x++)
LCD_WrDat(0);
}
}
/***************功能描述：显示6*8一组标准ASCII字符串 显示的坐标（x,y），y为页范围0～7****************/
void LCD_P6x8Str(unsigned char x,unsigned chary,unsigned char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!=' ')
{
c =ch[j]-32;
if(x>126){x=0;y++;}
LCD_Set_Pos(x,y);
for(i=0;i<6;i++)
LCD_WrDat(F6x8[c][i]);
x+=6;
j++;
}
}
/*******************功能描述：显示8*16一组标准ASCII字符串显示的坐标（x,y），y为页范围0～7****************/
void LCD_P8x16Str(unsigned char x,unsigned chary,unsigned char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!=' ')
{
c =ch[j]-32;
if(x>120){x=0;y++;}
LCD_Set_Pos(x,y);
for(i=0;i<8;i++)
LCD_WrDat(F8X16[c*16+i]);
LCD_Set_Pos(x,y+1);
for(i=0;i<8;i++)
LCD_WrDat(F8X16[c*16+i+8]);
x+=8;
j++;
}
}
/*****************功能描述：显示16*16点阵显示的坐标（x,y），y为页范围0～7****************************/
void LCD_P16x16Ch(unsigned char x,unsigned chary,unsigned charN)
{
unsigned char wm=0;
unsigned int adder=32*N;//
LCD_Set_Pos(x , y);
for(wm = 0;wm < 16;wm++)//
{
LCD_WrDat(F16x16[adder]);
adder += 1;
}
LCD_Set_Pos(x,y + 1);
for(wm = 0;wm < 16;wm++) //
{
LCD_WrDat(F16x16[adder]);
adder += 1;
}
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void Draw_BMP(unsigned char x0,unsigned chary0,unsigned char x1,unsigned chary1,unsigned char BMP[])
{
unsigned int j=0;
unsigned char x,y;
if(y1%8==0) y=y1/8;
else y=y1/8+1;
for(y=y0;y<y1;y++)
{
LCD_Set_Pos(x0,y);
for(x=x0;x<x1;x++)
{
LCD_WrDat(BMP[j++]);
}
}
}
//初始化SSD1306
void OLED_Init(void)
{
GPIO_InitTypeDefGPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOD, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 SCLK - PB8SDIN - PB9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; //这个频率不能太高，10M我试过，OLED屏显示会有问题
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; // DC - PB5
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽输出
GPIO_Init(GPIOB, &GPIO_InitStructure);
// RST - PD6
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_SetBits(GPIOD, GPIO_Pin_6);
LCD_SCL=1;
LCD_RST=0;
LCD_DLY_ms(50);
LCD_RST=1; //从上电到下面开始初始化要有足够的时间，即等待RC复位完毕
LCD_WrCmd(0xae);//--turn off oled panel
LCD_WrCmd(0x00);//---set low column address
LCD_WrCmd(0x10);//---set high column address
LCD_WrCmd(0x40);//--set start line addressSet Mapping RAM Display Start Line (0x00~0x3F)
LCD_WrCmd(0x81);//--set contrast control register
LCD_WrCmd(0xcf); // Set SEG Output Current Brightness
LCD_WrCmd(0xa1);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
LCD_WrCmd(0xc8);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
LCD_WrCmd(0xa6);//--set normal display
LCD_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
LCD_WrCmd(0x3f);//--1/64 duty
LCD_WrCmd(0xd3);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
LCD_WrCmd(0x00);//-not offset
LCD_WrCmd(0xd5);//--set display clock pide ratio/oscillator frequency
LCD_WrCmd(0x80);//--set pide ratio, Set Clock as 100 Frames/Sec
LCD_WrCmd(0xd9);//--set pre-charge period
LCD_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
LCD_WrCmd(0xda);//--set com pins hardware configuration
LCD_WrCmd(0x12);
LCD_WrCmd(0xdb);//--set vcomh
LCD_WrCmd(0x40);//Set VCOM Deselect Level
LCD_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
LCD_WrCmd(0x02);//
LCD_WrCmd(0x8d);//--set Charge Pump enable/disable
LCD_WrCmd(0x14);//--set(0x10) disable
LCD_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
LCD_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7)
LCD_WrCmd(0xaf);//--turn on oled panel
LCD_Fill(0x00);//初始清屏
LCD_Set_Pos(0,0);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int main(void)
{
/* Add your application code here*/
unsigned char i=0;
LED_GPIO_Config();
delay_init(72); //延时初始化
OLED_Init(); //初始化OLED
LCD_P8x16Str(28,0,"OLED TEST");
LCD_P8x16Str(20,2,"OLEDDISPLAY");
LCD_P6x8Str(16,5,"123456789@qq.com");
LCD_P6x8Str(34,6,"2014-11-22");
delay_ms(1000);
Draw_BMP(0,0,128,8,BMP);//图片显示
delay_ms(1500); //延时1s
LCD_Fill(0);
while(1)
{
LED4_OFF;
delay_ms(1000); //延时1s
LED4_ON;
delay_ms(1000); //延时1s
for(i=0; i<8; i++)
{
LCD_P16x16Ch(i*16,0,i);//点阵显示
LCD_P16x16Ch(i*16,2,i+8);
LCD_P16x16Ch(i*16,4,i+16);
LCD_P16x16Ch(i*16,6,i+24);
}
}
}