初出茅庐的小李第24篇博客之OLED 小屏幕显示汉字
开始前的准备工作
- STM32C8T6最小系统板（穷逼专用开发板）
- 0.96寸SPI接口的OLED屏幕（个人感觉I2C的更好用，比较人家废了功夫了
- 杜邦线若干（没有杜邦线的感觉真的很难受，相连连不上才最难受）
- 中景园的例程代码一份（我也不知道哪来的，好像是学长给的）
目标是能显示自己想要的汉字
（其实就是偷梁换柱，自己取个字模换进去）
好了直接上代码
//***************************/
//接线方式说明:
//GND 电源地
//VCC 接5V或3.3v电源
//D0 接PA5（SCL）
//D1 接PA7（SDA）
//RES 接PB0
//DC 接PB1
//CS 接PA4
//**************************/
#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"
#include "delay.h"
//OLED的显存
//存放格式如下：
//0 1 2 3 ... 127 [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]
#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
//num:数值(0~4294967295);
//len :数字的位数
//size:字体大小
//mode:模式 0,填充模式;1,叠加模式
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_4|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GPIOA4,5,7
GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_4);
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GPIOB0,1,8
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);
}
不得不说人家写的代码确实比自己写的规范对着SSD1306芯片写驱动程序以我的水平恐怕是还驱动不起来，不过研究一下驱动代码我认为还是很有必要的。
/*
**************************
//VCC 接5V或3.3v电源
//GND 电源地
//D0 接PA5（SCL）
//D1 接PA7（SDA）
//RES 接PB0
//DC 接PB1
//CS 接PA4
*************************
*/
#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)
#define LED_OFF GPIO_SetBits(GPIOB,GPIO_Pin_8)
//-----------------OLED端口定义----------------
//这个指示灯的其实我没有用到，不过如果是用它做一个测试应该很方便
#define OLED_SCLK_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_5)//SCLK
#define OLED_SCLK_Set() GPIO_SetBits(GPIOA,GPIO_Pin_5)
#define OLED_SDIN_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_7)//SDIN
#define OLED_SDIN_Set() GPIO_SetBits(GPIOA,GPIO_Pin_7)//PA7
#define OLED_RST_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_0)//RES
#define OLED_RST_Set() GPIO_SetBits(GPIOB,GPIO_Pin_0)//PB0
#define OLED_DC_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_1)//DC
#define OLED_DC_Set() GPIO_SetBits(GPIOB,GPIO_Pin_1)//PB1
#define OLED_CS_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_4)//CS
#define OLED_CS_Set() GPIO_SetBits(GPIOA,GPIO_Pin_4)//PA4
#define OLED_CMD 0 //0写命令
#define OLED_DATA 1 //1写数据
//OLED控制用函数
void OLED_WR_Byte(u8 dat,u8 cmd); //写字节数据
void OLED_Display_On(void); //屏幕开
void OLED_Display_Off(void); //屏幕关
void OLED_Init(void); //OLED初始化
void OLED_Clear(void); //OLED清屏
void OLED_DrawPoint(u8 x,u8 y,u8 t); //画点函数
void OLED_Fill(u8 x1,u8 y1,u8 x2,u8 y2,u8 dot); //区域填充函数
void OLED_ShowChar(u8 x,u8 y,u8 chr); //特定位置显示字符
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size);//特定位置显示汉字
void OLED_ShowString(u8 x,u8 y, u8 *p); //特定位置显示字符串
void OLED_Set_Pos(unsigned char x, unsigned char y);//设置偏移坐标
void OLED_ShowCHinese(u8 x,u8 y,u8 no); //特定位置显示汉字
void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[]);
//特定位置显示图片
u32 oled_pow(u8 m,u8 n);
//求m的n次方函数
#endif
# C文件和H文件都写好了，接下来就是主函数了
其实最关键的就是这个字库（部分字库）
根据他的取模方式自己取模放到这里然后调用对应函数就可以显示了
char Hzk[][32]={
{0x00,0x10,0x10,0x9A,0xD6,0x30,0x80,0x8C,0x0C,0xEC,0xFC,0x0C,0x0C,0xFC,0x3C,0x00},
{0x00,0x04,0x02,0xFF,0xFF,0x03,0x47,0x60,0x38,0x0F,0x00,0x40,0x40,0x7F,0x00,0x00},/*初0*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF8,0xF8,0x80,0x80,0x80,0xFE,0xFE,0x80,0x80,0x80,0xF8,0x00,0x00,0x00},
{0x00,0x00,0x7E,0x60,0x60,0x60,0x60,0x7F,0x7F,0x60,0x60,0x60,0x60,0xFE,0x00,0x00},/*出1*/
/* (16 X 16 , 黑体 )*/
{0x00,0x04,0x04,0x24,0x24,0xBE,0xA4,0x24,0x24,0xA4,0xBE,0x64,0x64,0x04,0x04,0x00},
{0x00,0x62,0x22,0x32,0x12,0x0A,0x46,0x47,0x7F,0x03,0x02,0x02,0x02,0x06,0x02,0x00},/*茅2*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF8,0xF8,0x08,0xC8,0x48,0x48,0x7E,0x7C,0x48,0x48,0xC8,0xC8,0x08,0x00},
{0x00,0x70,0x3F,0x00,0x60,0x3F,0x02,0x02,0x02,0x02,0x02,0x02,0x03,0x07,0x00,0x00},/*庐3*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF0,0x18,0x1E,0x10,0xF0,0x80,0xE0,0x3C,0x16,0x10,0x10,0xF0,0xF0,0x00},
{0x00,0x00,0x7F,0x21,0x21,0x21,0x7F,0x00,0x00,0x01,0x47,0x44,0x40,0x7F,0x01,0x00},/*的4*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0x00,0xC0,0x60,0x00,0x00,0xFE,0xFE,0x00,0x00,0x60,0xC0,0x00,0x00,0x00},
{0x00,0x08,0x0E,0x03,0x00,0x00,0x40,0x7F,0x7F,0x00,0x00,0x00,0x01,0x0F,0x00,0x00},/*小5*/
/* (16 X 16 , 黑体 )*/
{0x00,0x88,0xC8,0xC8,0xE8,0xB8,0x98,0xFE,0xFE,0x98,0xB8,0xE8,0x48,0xC8,0xC8,0x00},
{0x00,0x08,0x08,0x09,0x08,0x48,0xC8,0x7C,0x3E,0x0A,0x09,0x09,0x08,0x08,0x08,0x00},/*李6*/
/* (16 X 16 , 黑体 )*/
};
这个字库的取模方式如下
经过取模之后
初(0) 出(1) 茅(2) 庐(3) 的(4) 小(5) 李(6)
{0x00,0x10,0x10,0x9A,0xD6,0x30,0x80,0x8C,0x0C,0xEC,0xFC,0x0C,0x0C,0xFC,0x3C,0x00},
{0x00,0x04,0x02,0xFF,0xFF,0x03,0x47,0x60,0x38,0x0F,0x00,0x40,0x40,0x7F,0x00,0x00},/*"初",0*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF8,0xF8,0x80,0x80,0x80,0xFE,0xFE,0x80,0x80,0x80,0xF8,0x00,0x00,0x00},
{0x00,0x00,0x7E,0x60,0x60,0x60,0x60,0x7F,0x7F,0x60,0x60,0x60,0x60,0xFE,0x00,0x00},/*"出",1*/
/* (16 X 16 , 黑体 )*/
{0x00,0x04,0x04,0x24,0x24,0xBE,0xA4,0x24,0x24,0xA4,0xBE,0x64,0x64,0x04,0x04,0x00},
{0x00,0x62,0x22,0x32,0x12,0x0A,0x46,0x47,0x7F,0x03,0x02,0x02,0x02,0x06,0x02,0x00},/*"茅",2*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF8,0xF8,0x08,0xC8,0x48,0x48,0x7E,0x7C,0x48,0x48,0xC8,0xC8,0x08,0x00},
{0x00,0x70,0x3F,0x00,0x60,0x3F,0x02,0x02,0x02,0x02,0x02,0x02,0x03,0x07,0x00,0x00},/*"庐",3*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0xF0,0x18,0x1E,0x10,0xF0,0x80,0xE0,0x3C,0x16,0x10,0x10,0xF0,0xF0,0x00},
{0x00,0x00,0x7F,0x21,0x21,0x21,0x7F,0x00,0x00,0x01,0x47,0x44,0x40,0x7F,0x01,0x00},/*"的",4*/
/* (16 X 16 , 黑体 )*/
{0x00,0x00,0x00,0xC0,0x60,0x00,0x00,0xFE,0xFE,0x00,0x00,0x60,0xC0,0x00,0x00,0x00},
{0x00,0x08,0x0E,0x03,0x00,0x00,0x40,0x7F,0x7F,0x00,0x00,0x00,0x01,0x0F,0x00,0x00},/*"小",5*/
/* (16 X 16 , 黑体 )*/
{0x00,0x88,0xC8,0xC8,0xE8,0xB8,0x98,0xFE,0xFE,0x98,0xB8,0xE8,0x48,0xC8,0xC8,0x00},
{0x00,0x08,0x08,0x09,0x08,0x48,0xC8,0x7C,0x3E,0x0A,0x09,0x09,0x08,0x08,0x08,0x00},/*"李",6*/
/* (16 X 16 , 黑体 )*/
初(0) 出(1) 茅(2) 庐(3) 的(4) 小(5) 李(6)
DB 00H 10H 10H 9AH D6H 30H 80H 8CH 0CH ECH FCH 0CH 0CH FCH 3CH 00H;
DB 00H 04H 02H FFH FFH 03H 47H 60H 38H 0FH 00H 40H 40H 7FH 00H 00H;"初",0
/* (16 X 16 , 黑体 )*/
DB 00H 00H F8H F8H 80H 80H 80H FEH FEH 80H 80H 80H F8H 00H 00H 00H;
DB 00H 00H 7EH 60H 60H 60H 60H 7FH 7FH 60H 60H 60H 60H FEH 00H 00H;"出",1
/* (16 X 16 , 黑体 )*/
DB 00H 04H 04H 24H 24H BEH A4H 24H 24H A4H BEH 64H 64H 04H 04H 00H;
DB 00H 62H 22H 32H 12H 0AH 46H 47H 7FH 03H 02H 02H 02H 06H 02H 00H;"茅",2
/* (16 X 16 , 黑体 )*/
DB 00H 00H F8H F8H 08H C8H 48H 48H 7EH 7CH 48H 48H C8H C8H 08H 00H;
DB 00H 70H 3FH 00H 60H 3FH 02H 02H 02H 02H 02H 02H 03H 07H 00H 00H;"庐",3
/* (16 X 16 , 黑体 )*/
DB 00H 00H F0H 18H 1EH 10H F0H 80H E0H 3CH 16H 10H 10H F0H F0H 00H;
DB 00H 00H 7FH 21H 21H 21H 7FH 00H 00H 01H 47H 44H 40H 7FH 01H 00H;"的",4
/* (16 X 16 , 黑体 )*/
DB 00H 00H 00H C0H 60H 00H 00H FEH FEH 00H 00H 60H C0H 00H 00H 00H;
DB 00H 08H 0EH 03H 00H 00H 40H 7FH 7FH 00H 00H 00H 01H 0FH 00H 00H;"小",5
/* (16 X 16 , 黑体 )*/
DB 00H 88H C8H C8H E8H B8H 98H FEH FEH 98H B8H E8H 48H C8H C8H 00H;
DB 00H 08H 08H 09H 08H 48H C8H 7CH 3EH 0AH 09H 09H 08H 08H 08H 00H;"李",6
/* (16 X 16 , 黑体 )*/
第一种方式是C51格式，第二种的是A51的格式，要用C51的格式才可以（别问我为什么，我看人家的就是C51格式，我就依葫芦画瓢）
取模的效果个格式可以更改，我只改了字体，但是字号大小应该也可以更改，那样的话程序也要编写对应的字号的处理函数，这里没有该，因为暂时没有该大字体的需求。
void My_UI(void)
{
u8 i;
for(i=0;i<=6;i++)
{
OLED_ShowCHinese(i*18,0,i);//依次显示出“初出茅庐的小李”
}
OLED_ShowCHinese(0,3,7);//显示“红”
OLED_ShowCHinese(18,3,8);//显示“绿”
OLED_ShowCHinese(36,3,9);//显示“蓝”
OLED_ShowCHinese(54,3,10);//显示“灯”
OLED_ShowCHinese(72,3,11);//显示“继”
OLED_ShowCHinese(90,3,12);//显示“电”
OLED_ShowCHinese(108,3,13);//显示“器”
OLED_ShowCHinese(0,6,14);//显示“温”
OLED_ShowCHinese(18,6,15);//显示“湿”
OLED_ShowCHinese(36,6,16);//显示“度”
OLED_ShowCHinese(54,6,17);//显示“烟”
OLED_ShowCHinese(72,6,18);//显示“感”
OLED_ShowCHinese(90,6,19);//显示“光”
OLED_ShowCHinese(108,6,20);//显示“照”
}
这些字加上组合搭配应该就可以作出自己想要的界面了
当然他还可以显示更多的内容，需要再去研究
