OLED屏显示和汉字点阵编码原理
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文章目录
- 前言
- 一、认识I2C协议
- 二、基于IIC协议在OLED屏上实现显示相关信息
-
- 1、显示自己的学号和姓名
- 2、显示AHT20的温度和湿度
- 3、显示一段诗词
前言
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一、认识I2C协议
参考博客
二、基于IIC协议在OLED屏上实现显示相关信息
所使用的工具：
Keil、字模软件
所需函数内容：
void GUI_DrawPoint(u8 x, u8 y, u8 color);
void GUI_Fill(u8 sx,u8 sy,u8 ex,u8 ey,u8 color);
void GUI_DrawLine(u8 x1, u8 y1, u8 x2, u8 y2,u8 color);
void GUI_DrawRectangle(u8 x1, u8 y1, u8 x2, u8 y2,u8 color);
void GUI_FillRectangle(u8 x1, u8 y1, u8 x2, u8 y2,u8 color);
void GUI_DrawCircle(u8 xc, u8 yc, u8 color, u8 r);
void GUI_FillCircle(u8 xc, u8 yc, u8 color, u8 r);
void GUI_DrawTriangel(u8 x0,u8 y0,u8 x1,u8 y1,u8 x2,u8 y2,u8 color);
void GUI_FillTriangel(u8 x0,u8 y0,u8 x1,u8 y1,u8 x2,u8 y2,u8 color);
void GUI_ShowChar(u8 x,u8 y,u8 chr,u8 Char_Size,u8 mode);
void GUI_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 Size,u8 mode);
void GUI_ShowString(u8 x,u8 y,u8 *chr,u8 Char_Size,u8 mode);
void GUI_ShowFont16(u8 x,u8 y,u8 *s,u8 mode);
void GUI_ShowFont24(u8 x,u8 y,u8 *s,u8 mode);
void GUI_ShowFont32(u8 x,u8 y,u8 *s,u8 mode);
void GUI_ShowCHinese(u8 x,u8 y,u8 hsize,u8 *str,u8 mode);
void GUI_DrawBMP(u8 x,u8 y,u8 width, u8 height, u8 BMP[], u8 mode);
上述函数即可在通过GUI方式在OLED屏上显示相关内容
1、显示自己的学号和姓名
1、在oledfont.h函数中添加所要输出汉字的字模(使用上述工具即可知道所要汉字字模)：
oledfont.h
"周",0x00,0x00,0x3F,0xF8,0x21,0x08,0x21,0x08,0x2F,0xE8,0x21,0x08,0x21,0x08,0x3F,0xF8,
0x20,0x08,0x27,0xC8,0x24,0x48,0x24,0x48,0x27,0xC8,0x40,0x08,0x40,0x28,0x80,0x10,/*"周",0*/
"经",0x10,0x00,0x11,0xFC,0x20,0x08,0x24,0x10,0x44,0x30,0xF8,0x48,0x10,0x84,0x23,0x02,
0x40,0x00,0xFD,0xFC,0x40,0x20,0x00,0x20,0x1C,0x20,0xE0,0x20,0x43,0xFE,0x00,0x00,/*"经",0*/
"涛",0x00,0x40,0x20,0x40,0x17,0xFC,0x10,0x40,0x83,0xF8,0x40,0x80,0x47,0xFE,0x10,0x90,
0x11,0x10,0x21,0xFE,0xE2,0x10,0x22,0x90,0x24,0x50,0x28,0x10,0x20,0x50,0x00,0x20,/*"涛",0*/
2、在主函数中添加如下代码以实现在OLED显示所要输出字符：
main.c
int main()
{
GUI_ShowString(0,0,"632007060222",16,1);
GUI_ShowString(0,16,"周经涛",16,1);
}
效果展示：
利用OLED显示自己的学号和姓名
2、显示AHT20的温度和湿度
1、在oledfont.h函数中添加所要输出汉字的字模：
oledfont.h
"温",0x00,0x00,0x23,0xF8,0x12,0x08,0x12,0x08,0x83,0xF8,0x42,0x08,0x42,0x08,0x13,0xF8,
0x10,0x00,0x27,0xFC,0xE4,0xA4,0x24,0xA4,0x24,0xA4,0x24,0xA4,0x2F,0xFE,0x00,0x00,/*"温",1*/
"湿",0x00,0x00,0x27,0xF8,0x14,0x08,0x14,0x08,0x87,0xF8,0x44,0x08,0x44,0x08,0x17,0xF8,
0x11,0x20,0x21,0x20,0xE9,0x24,0x25,0x28,0x23,0x30,0x21,0x20,0x2F,0xFE,0x00,0x00,/*"湿",2*/
"度",0x01,0x00,0x00,0x80,0x3F,0xFE,0x22,0x20,0x22,0x20,0x3F,0xFC,0x22,0x20,0x22,0x20,
0x23,0xE0,0x20,0x00,0x2F,0xF0,0x24,0x10,0x42,0x20,0x41,0xC0,0x86,0x30,0x38,0x0E,/*"度",3*/
"传",0x08,0x40,0x08,0x40,0x08,0x40,0x13,0xF8,0x10,0x40,0x30,0x80,0x37,0xFE,0x50,0x80,
0x91,0x00,0x13,0xF8,0x10,0x08,0x11,0x10,0x10,0xA0,0x10,0x40,0x10,0x20,0x10,0x20,/*"传",4*/
"感",0x00,0x28,0x00,0x24,0x3F,0xFE,0x20,0x20,0x2F,0xA4,0x20,0x24,0x2F,0xA8,0x28,0x98,
0x28,0x92,0x4F,0xAA,0x40,0x46,0x80,0x82,0x01,0x00,0x48,0x84,0x48,0x12,0x87,0xF2,/*"感",5*/
"器",0x00,0x00,0x3E,0x7C,0x22,0x44,0x22,0x44,0x3E,0x7C,0x01,0x20,0x01,0x10,0xFF,0xFE,
0x02,0x80,0x0C,0x60,0x30,0x18,0xC0,0x06,0x3E,0x7C,0x22,0x44,0x22,0x44,0x3E,0x7C,/*"器",6*/
"：",0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x30,0x00,0x30,0x00,0x00,0x00,0x30,0x00,0x30,0x00,0x00,0x00,0x00,0x00,/*"：",0*/
2、在main.c中添加如下代码，实现AHT20温湿度和OLED的桥接：
main.c
int main(void)
{
uint32_t CT_data[2];
volatile int c1,t1;
float c,t;
/***********************************************************************************/
/**///上电初始化SDA，SCL的IO口
/***********************************************************************************/
Init_I2C_Sensor_Port();
/***********************************************************************************/
/**///①刚上电，产品芯片内部就绪需要时间，延时100~500ms,建议500ms
/***********************************************************************************/
Delay_1ms(500);
/***********************************************************************************/
/**///②上电第一次发0x71读取状态字，判断状态字是否为0x18,如果不是0x18,进行寄存器初始化
/***********************************************************************************/
if((AHT20_Read_Status()&0x18)!=0x18)
{
AHT20_Start_Init(); //重新初始化寄存器
Delay_1ms(10);
}
Serial_Init();
delay_init(); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
OLED_Init(); //初始化OLED
OLED_Clear(0); //清屏（全黑）
/***********************************************************************************/
/**///③根据客户自己需求发测量命令读取温湿度数据，当前while（1）循环发测量命令读取温湿度数据，仅供参考
/***********************************************************************************/
while(1)
{
// AHT20_Read_CTdata(CT_data); //不经过CRC校验，直接读取AHT20的温度和湿度数据 推荐每隔大于1S读一次
AHT20_Read_CTdata_crc(CT_data); //crc校验后，读取AHT20的温度和湿度数据
c1 = CT_data[0]*100*10/1024/1024; //计算得到湿度值c1（放大了10倍）
t1 = CT_data[1]*200*10/1024/1024-500;//计算得到温度值t1（放大了10倍）
c=c1/10.0;
t=t1/10.0;
下一步客户处理显示数据，
/***********************************************************************************/
GUI_ShowCHinese(0,0,16,"温湿度传感器",1);
GUI_ShowCHinese(0,17,16,"温度：",1);
//GUI_ShowString(34,17,"：",16,1);
GUI_ShowNum(50,17,c,2,16,1);
GUI_ShowCHinese(0,35,16,"湿度：",1);
//GUI_ShowString(34,35,"：",16,1);
GUI_ShowNum(50,35,t,2,16,1);
}
}
效果展示：
利用OLED显示AHT20的温度和湿度
3、显示一段诗词
1、控制字符滚动的函数：
oled.c
void OLED_WR_Byte(unsigned dat,unsigned cmd)
{
if(cmd)
{
OLED_DC_Set();
}
else
{
OLED_DC_Clr();
}
OLED_CS_Clr();
SPI_WriteByte(SPI2,dat);
OLED_CS_Set();
}
2、在oledfont.h函数中添加所要输出汉字的字模：
oledfont.h
"先",0x01,0x00,0x11,0x00,0x11,0x00,0x1F,0xF8,0x21,0x00,0x41,0x00,0x01,0x00,0xFF,0xFE,
0x04,0x40,0x04,0x40,0x04,0x40,0x08,0x40,0x08,0x42,0x10,0x42,0x20,0x3E,0xC0,0x00,/*"先",0*/
"行",0x08,0x00,0x09,0xFC,0x10,0x00,0x20,0x00,0x48,0x00,0x08,0x00,0x13,0xFE,0x30,0x20,
0x50,0x20,0x90,0x20,0x10,0x20,0x10,0x20,0x10,0x20,0x10,0x20,0x10,0xA0,0x10,0x40,/*"行",0*/
"其",0x08,0x20,0x08,0x20,0x7F,0xFC,0x08,0x20,0x08,0x20,0x0F,0xE0,0x08,0x20,0x08,0x20,
0x0F,0xE0,0x08,0x20,0x08,0x20,0xFF,0xFE,0x00,0x00,0x08,0x20,0x10,0x10,0x20,0x08,/*"其",0*/
"言",0x02,0x00,0x01,0x00,0xFF,0xFE,0x00,0x00,0x00,0x00,0x3F,0xF8,0x00,0x00,0x00,0x00,
0x3F,0xF8,0x00,0x00,0x00,0x00,0x3F,0xF8,0x20,0x08,0x20,0x08,0x3F,0xF8,0x20,0x08,/*"言",0*/
"而",0x00,0x00,0x7F,0xFC,0x01,0x00,0x01,0x00,0x02,0x00,0x3F,0xF8,0x24,0x88,0x24,0x88,
0x24,0x88,0x24,0x88,0x24,0x88,0x24,0x88,0x24,0x88,0x24,0x88,0x20,0x28,0x20,0x10,/*"而",0*/
"后",0x00,0x10,0x00,0xF8,0x1F,0x00,0x10,0x00,0x10,0x00,0x1F,0xFE,0x10,0x00,0x10,0x00,
0x10,0x00,0x17,0xF8,0x14,0x08,0x24,0x08,0x24,0x08,0x44,0x08,0x87,0xF8,0x04,0x08,/*"后",0*/
"从",0x08,0x20,0x08,0x20,0x08,0x20,0x08,0x20,0x08,0x20,0x08,0x20,0x08,0x20,0x08,0x20,
0x08,0x50,0x14,0x50,0x12,0x50,0x12,0x88,0x20,0x88,0x21,0x04,0x42,0x04,0x84,0x02,/*"从",0*/
"之",0x02,0x00,0x01,0x00,0x01,0x00,0x00,0x00,0x7F,0xF8,0x00,0x10,0x00,0x20,0x00,0x40,
0x00,0x80,0x01,0x00,0x02,0x00,0x04,0x00,0x18,0x00,0x24,0x00,0x43,0xFE,0x00,0x00,/*"之",0*/
3、在main.c中写入以下代码：
main.c
//All rights reserved
/****************************************************************************************************
//=========================================电源接线================================================//
// OLED模块 STM32单片机
// VCC 接 DC 5V/3.3V //OLED屏电源正
// GND 接 GND //OLED屏电源地
//=======================================液晶屏数据线接线==========================================//
//本模块默认数据总线类型为4线制SPI
// OLED模块 STM32单片机
// D1 接 PB15 //OLED屏SPI写信号
//=======================================液晶屏控制线接线==========================================//
// OLED模块 STM32单片机
// CS 接 PB11 //OLED屏片选控制信号
// RES 接 PB12 //OLED屏复位控制信号
// DC 接 PB10 //OLED屏数据/命令选择控制信号
// D0 接 PB13 //OLED屏SPI时钟信号
//=========================================触摸屏接线=========================================//
//本模块不带触摸功能，所以不需要触摸屏接线
****************************************************************************************************/
/***************************************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, QD electronic SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
****************************************************************************************************/
#include "delay.h"
#include "sys.h"
#include "oled.h"
#include "gui.h"
#include "test.h"
int main(void)
{
delay_init(); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
OLED_Init(); //初始化OLED
OLED_Clear(0); //清屏（全黑）
OLED_WR_Byte(0x2E,OLED_CMD); //关闭滚动
OLED_WR_Byte(0x27,OLED_CMD); //水平向左或者右滚动 26/27
OLED_WR_Byte(0x00,OLED_CMD); //虚拟字节
OLED_WR_Byte(0x00,OLED_CMD); //起始页 0
OLED_WR_Byte(0x07,OLED_CMD); //滚动时间间隔
OLED_WR_Byte(0x07,OLED_CMD); //终止页 7
OLED_WR_Byte(0x00,OLED_CMD); //虚拟字节
OLED_WR_Byte(0xFF,OLED_CMD); //虚拟字节
TEST_MainPage();
OLED_WR_Byte(0x2F,OLED_CMD); //开启滚动
}
效果展示：
利用OLED显示一段诗词