内容：利用最小系统STM32f103CB点亮OLED液晶屏幕
OLED使用的是有7个引脚的分别为的：GND 、VCC、D0、D0、RES、DC、CS
其中OLED与STM32的硬件连接：
D0----PA5
D0----PA7
RES---PB0
DC---PB1
CS---PA1
以下为程序代码
OLED.h
- #ifndef __OLED_H
- #define __OLED_H
- #include "sys.h"
- #include "stdlib.h"
- //OLED模式设置
- //0:4线串行模式
- //1:并行8080模式
- #define OLED_MODE 0
- #define SIZE 16
- #define XLevelL 0x00
- #define XLevelH 0x10
- #define Max_Column 128
- #define Max_Row 64
- #define Brightness 0xFF
- #define X_WIDTH 128
- #define Y_WIDTH 64
- //-----------------测试LED端口定义----------------
- #define LED_ON GPIO_ResetBits(GPIOB,GPIO_Pin_8)//DC
- #define LED_OFF GPIO_SetBits(GPIOB,GPIO_Pin_8)
- //-----------------OLED端口定义----------------
- #define OLED_SCLK_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_5)//CLK
- #define OLED_SCLK_Set() GPIO_SetBits(GPIOA,GPIO_Pin_5)
- #define OLED_SDIN_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_7)//DIN
- #define OLED_SDIN_Set() GPIO_SetBits(GPIOA,GPIO_Pin_7)
- #define OLED_RST_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_0)//RES
- #define OLED_RST_Set() GPIO_SetBits(GPIOB,GPIO_Pin_0)
- #define OLED_DC_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_1)//DC
- #define OLED_DC_Set() GPIO_SetBits(GPIOB,GPIO_Pin_1)
- #define OLED_CS_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_1)//CS
- #define OLED_CS_Set() GPIO_SetBits(GPIOA,GPIO_Pin_1)
- #define OLED_CMD 0 //写命令
- #define OLED_DATA 1 //写数据
- //OLED控制用函数
- void OLED_WR_Byte(u8 dat,u8 cmd);
- void OLED_Display_On(void);
- void OLED_Display_Off(void);
- void OLED_Init(void);
- void OLED_Clear(void);
- void OLED_DrawPoint(u8 x,u8 y,u8 t);
- void OLED_Fill(u8 x1,u8 y1,u8 x2,u8 y2,u8 dot);
- void OLED_ShowChar(u8 x,u8 y,u8 chr);
- void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size);
- void OLED_ShowString(u8 x,u8 y, u8 *p);
- void OLED_Set_Pos(unsigned char x, unsigned char y);
- void OLED_ShowCHinese(u8 x,u8 y,u8 no);
- void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[]);
- #endif
OLED.c
- #include "oled.h"
- #include "stdlib.h"
- #include "oledfont.h"
- #include "delay.h"
- //OLED的显存
- //存放格式如下.
- //[0]0 1 2 3 ... 127
- //[1]0 1 2 3 ... 127
- //[2]0 1 2 3 ... 127
- //[3]0 1 2 3 ... 127
- //[4]0 1 2 3 ... 127
- //[5]0 1 2 3 ... 127
- //[6]0 1 2 3 ... 127
- //[7]0 1 2 3 ... 127
- #if OLED_MODE==1
- //向SSD1106写入一个字节。
- //dat:要写入的数据/命令
- //cmd:数据/命令标志 0,表示命令;1,表示数据;
- void OLED_WR_Byte(u8 dat,u8 cmd)
- {
- DATAOUT(dat);
- if(cmd)
- OLED_DC_Set();
- else
- OLED_DC_Clr();
- OLED_CS_Clr();
- OLED_WR_Clr();
- OLED_WR_Set();
- OLED_CS_Set();
- OLED_DC_Set();
- }
- #else
- //向SSD1106写入一个字节。
- //dat:要写入的数据/命令
- //cmd:数据/命令标志 0,表示命令;1,表示数据;
- void OLED_WR_Byte(u8 dat,u8 cmd)
- {
- u8 i;
- if(cmd)
- OLED_DC_Set();
- else
- OLED_DC_Clr();
- OLED_CS_Clr();
- for(i=0;i<8;i++)
- {
- OLED_SCLK_Clr();
- if(dat&0x80)
- OLED_SDIN_Set();
- else
- OLED_SDIN_Clr();
- OLED_SCLK_Set();
- dat<<=1;
- }
- OLED_CS_Set();
- OLED_DC_Set();
- }
- #endif
- void OLED_Set_Pos(unsigned char x, unsigned char y)
- {
- OLED_WR_Byte(0xb0+y,OLED_CMD);
- OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
- OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD);
- }
- //开启OLED显示
- void OLED_Display_On(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
- OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON
- OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
- }
- //关闭OLED显示
- void OLED_Display_Off(void)
- {
- OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
- OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF
- OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
- }
- //清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
- void OLED_Clear(void)
- {
- u8 i,n;
- for(i=0;i<8;i++)
- {
- OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址（0~7）
- OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
- OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
- for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA);
- } //更新显示
- }
- //在指定位置显示一个字符,包括部分字符
- //x:0~127
- //y:0~63
- //mode:0,反白显示;1,正常显示
- //size:选择字体 16/12
- void OLED_ShowChar(u8 x,u8 y,u8 chr)
- {
- unsigned char c=0,i=0;
- c=chr-' ';//得到偏移后的值
- if(x>Max_Column-1){x=0;y=y+2;}
- if(SIZE ==16)
- {
- OLED_Set_Pos(x,y);
- for(i=0;i<8;i++)
- OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
- OLED_Set_Pos(x,y+1);
- for(i=0;i<8;i++)
- OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
- }
- else {
- OLED_Set_Pos(x,y+1);
- for(i=0;i<6;i++)
- OLED_WR_Byte(F6x8[c][i],OLED_DATA);
- }
- }
- //m^n函数
- u32 oled_pow(u8 m,u8 n)
- {
- u32 result=1;
- while(n--)result*=m;
- return result;
- }
- //显示2个数字
- //x,y :起点坐标
- //len :数字的位数
- //size:字体大小
- //mode:模式 0,填充模式;1,叠加模式
- //num:数值(0~4294967295);
- void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size)
- {
- u8 t,temp;
- u8 enshow=0;
- for(t=0;t<len;t++)
- {
- temp=(num/oled_pow(10,len-t-1))%10;
- if(enshow==0&&t<(len-1))
- {
- if(temp==0)
- {
- OLED_ShowChar(x+(size/2)*t,y,' ');
- continue;
- }else enshow=1;
- }
- OLED_ShowChar(x+(size/2)*t,y,temp+'0');
- }
- }
- //显示一个字符号串
- void OLED_ShowString(u8 x,u8 y,u8 *chr)
- {
- unsigned char j=0;
- while (chr[j]!='\0')
- { OLED_ShowChar(x,y,chr[j]);
- x+=8;
- if(x>120){x=0;y+=2;}
- j++;
- }
- }
- //显示汉字
- void OLED_ShowCHinese(u8 x,u8 y,u8 no)
- {
- u8 t,adder=0;
- OLED_Set_Pos(x,y);
- for(t=0;t<16;t++)
- {
- OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
- adder+=1;
- }
- OLED_Set_Pos(x,y+1);
- for(t=0;t<16;t++)
- {
- OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);
- 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 OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,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++)
- {
- OLED_Set_Pos(x0,y);
- for(x=x0;x<x1;x++)
- {
- OLED_WR_Byte(BMP[j++],OLED_DATA);
- }
- }
- }
- //初始化SSD1306
- void OLED_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能A端口时钟
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//速度50MHz
- GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIOD3,6
- GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_1);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能B端口时钟
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_8;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//速度50MHz
- GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化GPIOD3,6
- GPIO_SetBits(GPIOB,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_8);
- OLED_RST_Set();
- delay_ms(100);
- OLED_RST_Clr();
- delay_ms(200);
- OLED_RST_Set();
- OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
- OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
- OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
- OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
- OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
- OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
- OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
- OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
- OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
- OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
- OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
- OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
- OLED_WR_Byte(0x00,OLED_CMD);//-not offset
- OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
- OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
- OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
- OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
- OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
- OLED_WR_Byte(0x12,OLED_CMD);
- OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
- OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
- OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
- OLED_WR_Byte(0x02,OLED_CMD);//
- OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
- OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
- OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
- OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
- OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
- OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
- OLED_Clear();
- OLED_Set_Pos(0,0);
- }
main.c
- #include "stm32f10x.h"
- #include "delay.h"
- #include "oled.h"
- int main(void)
- {
- delay_init(72); //延时函数初始化
- OLED_Init(); //初始化OLED
- OLED_Clear() ;
- OLED_ShowString(0,0,"Analog:");
- OLED_ShowString(0,3,"Digital:");
- }
在进行实验时出现当使用PA3口作为CS口时候出现花屏现象，而且即使出现图案也会不稳定只要动一下CS连接的那根线就会花屏，在将CS接地后或者使用PA1口就不会出现这种现象。目前还不能解决，应该是PA3口没有输出导致PA3引脚悬空了处于一个不稳定的状态。
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