Keil&STM32C8T6——基于SPI的OLED屏显汉字_2.4寸spi屏幕取字模

一、SPI、OLED与汉字点阵

（一）什么是SPI

SPI(Serial Peripheral Interface)[串行外围接口]是一种接口总线，通常用于与闪存、传感器、实时时钟(RTCs)、模数转换器等进行通信。 串行外围接口(SPI)总线是由摩托罗拉公司开发的，用于在主设备和从设备之间提供全双工同步串行通信。

（二）SPI接口

如图1所示，一个标准的SPI连接涉及到一个主机master使用串行时钟(SCK)、主输出从输入(MOSI)、主输出从输出(MISO)和从选择(SS)线连接到一个或几个从机slave。SCK、MOSI和MISO信号可以由从机slave共享，而每个从机slave都有一条惟一的SS线。

Figure 1. 4-wire SPI bus configuration with multiple slaves

（三）OLED介绍

OLED即有机发光二极管（Organic Light-Emitting Diode），又称为有机电激光显示（Organic Electroluminesence Display， OELD）。OLED 由于同时具备自发光，不需背光源、对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、构造及制程较简单等优异之特性，被认为是下一代的平面显示器新兴应用技术。

LCD 都需要背光，而 OLED 不需要，因为它是自发光的。这样同样的显示，OLED 效果要来得好一些。以目前的技术，OLED 的尺寸还难以大型化，但是分辨率确可以做到很高。

（四）汉字点阵

1、 在汉字的点阵字库中，每个字节的每个位都代表一个汉字的一个点，每个汉字都是由一个矩形的点阵组成，0代表没有，1代表有点，将0和1分别用不同颜色画出，就形成了一个汉字，常用的点阵矩阵有12x12, 14x14, 16x16三种字库。
2、 字库根据字节所表示点的不同有分为横向矩阵和纵向矩阵，目前多数的字库都是横向矩阵的存储方式(用得最多的应该是早期UCDOS字库)，纵向矩阵一般是因为有某些液晶是采用纵向扫描显示法，为了提高显示速度，于是便把字库矩阵做成纵向，省得在显示时还要做矩阵转换。我们接下去所描述的都是指横向矩阵字库。

二、程序

（一）取字模

使用字模提取软件，进行字模提取。
首先在文字输入区输入文字，再Ctrl+Enter进行，最后在取模方式中选择C51格式得到结果。

（二）编写代码

1.名字和学号

修改test.c文件

void TEST_MainPage(void)
{	
	GUI_ShowCHinese(28,20,16,"张三",1);//中文姓名
	GUI_ShowString(4,48,"12345678910",16,1);//数字
	delay_ms(1500);		
	delay_ms(1500);
}
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将点阵编码加入oledfont.h头文件中

const typFNT_GB16 cfont16[] = 
{	"全",0x01,0x00,0x01,0x00,0x02,0x80,0x04,0x40,0x08,0x20,0x10,0x10,0x2F,0xE8,0xC1,0x06,
	0x01,0x00,0x01,0x00,0x1F,0xF0,0x01,0x00,0x01,0x00,0x01,0x00,0x7F,0xFC,0x00,0x00,/*"全",0*/
	"动",0x00,0x40,0x00,0x40,0x7C,0x40,0x00,0x40,0x01,0xFC,0x00,0x44,0xFE,0x44,0x20,0x44,
	0x20,0x44,0x20,0x84,0x48,0x84,0x44,0x84,0xFD,0x04,0x45,0x04,0x02,0x28,0x04,0x10,/*"动",1*/
	"电",0x01,0x00,0x01,0x00,0x01,0x00,0x3F,0xF8,0x21,0x08,0x21,0x08,0x21,0x08,0x3F,0xF8,
	0x21,0x08,0x21,0x08,0x21,0x08,0x3F,0xF8,0x21,0x0A,0x01,0x02,0x01,0x02,0x00,0xFE,/*"电",0*/
	"子",0x00,0x00,0x7F,0xF8,0x00,0x10,0x00,0x20,0x00,0x40,0x01,0x80,0x01,0x00,0xFF,0xFE,
	0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x05,0x00,0x02,0x00,/*"子",1*/
	"技",0x10,0x20,0x10,0x20,0x10,0x20,0x13,0xFE,0xFC,0x20,0x10,0x20,0x10,0x20,0x15,0xFC,
	0x18,0x84,0x30,0x88,0xD0,0x48,0x10,0x50,0x10,0x20,0x10,0x50,0x51,0x88,0x26,0x06,/*"技",2*/
	"术",0x01,0x00,0x01,0x20,0x01,0x10,0x01,0x10,0x7F,0xFC,0x03,0x80,0x05,0x40,0x05,0x40,
	0x09,0x20,0x11,0x10,0x21,0x08,0x41,0x04,0x81,0x02,0x01,0x00,0x01,0x00,0x01,0x00,/*"术",3*/
	"系",0x00,0xF8,0x3F,0x00,0x04,0x00,0x08,0x20,0x10,0x40,0x3F,0x80,0x01,0x00,0x06,0x10,
	0x18,0x08,0x7F,0xFC,0x01,0x04,0x09,0x20,0x11,0x10,0x21,0x08,0x45,0x04,0x02,0x00,/*"系",0*/
	"统",0x10,0x40,0x10,0x20,0x20,0x20,0x23,0xFE,0x48,0x40,0xF8,0x88,0x11,0x04,0x23,0xFE,
	0x40,0x92,0xF8,0x90,0x40,0x90,0x00,0x90,0x19,0x12,0xE1,0x12,0x42,0x0E,0x04,0x00,/*"统",1*/
	"设",0x00,0x00,0x21,0xF0,0x11,0x10,0x11,0x10,0x01,0x10,0x02,0x0E,0xF4,0x00,0x13,0xF8,
	0x11,0x08,0x11,0x10,0x10,0x90,0x14,0xA0,0x18,0x40,0x10,0xA0,0x03,0x18,0x0C,0x06,/*"设",2*/
	"置",0x7F,0xFC,0x44,0x44,0x7F,0xFC,0x01,0x00,0x7F,0xFC,0x01,0x00,0x1F,0xF0,0x10,0x10,
	0x1F,0xF0,0x10,0x10,0x1F,0xF0,0x10,0x10,0x1F,0xF0,0x10,0x10,0xFF,0xFE,0x00,0x00,/*"置",3*/
	"音",0x02,0x00,0x01,0x00,0x3F,0xF8,0x00,0x00,0x08,0x20,0x04,0x40,0xFF,0xFE,0x00,0x00,
	0x1F,0xF0,0x10,0x10,0x10,0x10,0x1F,0xF0,0x10,0x10,0x10,0x10,0x1F,0xF0,0x10,0x10,/*"音",4*/
	"量",0x00,0x00,0x1F,0xF0,0x10,0x10,0x1F,0xF0,0x10,0x10,0xFF,0xFE,0x00,0x00,0x1F,0xF0,
	0x11,0x10,0x1F,0xF0,0x11,0x10,0x1F,0xF0,0x01,0x00,0x1F,0xF0,0x01,0x00,0x7F,0xFC,/*"量",5*/
	"颜",0x10,0x00,0x08,0xFE,0x7F,0x10,0x22,0x20,0x14,0x7C,0x7F,0x44,0x44,0x54,0x48,0x54,
	0x52,0x54,0x44,0x54,0x48,0x54,0x51,0x54,0x42,0x28,0x44,0x24,0x88,0x42,0x30,0x82,/*"颜",6*/
	"色",0x08,0x00,0x08,0x00,0x1F,0xE0,0x20,0x20,0x40,0x40,0xBF,0xF8,0x21,0x08,0x21,0x08,
	0x21,0x08,0x3F,0xF8,0x20,0x00,0x20,0x02,0x20,0x02,0x20,0x02,0x1F,0xFE,0x00,0x00,/*"色",7*/
	"网",0x00,0x00,0x7F,0xFC,0x40,0x04,0x40,0x04,0x42,0x14,0x52,0x94,0x4A,0x54,0x44,0x24,
	0x44,0x24,0x4A,0x54,0x4A,0x54,0x52,0x94,0x61,0x04,0x40,0x04,0x40,0x14,0x40,0x08,/*"网",8*/
	"络",0x10,0x80,0x10,0x80,0x20,0xF8,0x21,0x08,0x4B,0x10,0xFC,0xA0,0x10,0x40,0x20,0xA0,
	0x41,0x18,0xFA,0x06,0x45,0xF8,0x01,0x08,0x19,0x08,0xE1,0x08,0x41,0xF8,0x01,0x08,/*"络",9*/

};

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2.滚动显示

main函数

#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
}


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test.c

void TEST_MainPage(void)
{	
	GUI_ShowCHinese(10,20,16,"12345678",1);
	delay_ms(1500);		
	delay_ms(1500);
}
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屏幕出了点问题,显示不出来

三、总结

使用SPI接口实现了在OLED屏中显示名字，学号，以及实现流动字幕。

四、引用

【噗噗的罐子】【嵌入式16】STM32+OLED屏显应用实例
【thammer】SPI介绍