STM32-SPI驱动7针脚OLED,显示中文，字符串，数字，图片。

STM32-SPI驱动7针脚OLED,显示中文，数字，图片。

本文为STM32f103rct6利用SPI驱动7针脚oled模块显示中文，数字和图片。

1，如图，为本次驱动的oled模块

2，引脚定义：

GND–电源地；

VCC–电源正极（3.3v~5v);

D0–时钟线；

D1–数据线；

RES–复位线；

DC–数据/命令控制线；

CS–片选线，低电平有效，如果不用，必须接地；

首先我们自己从淘宝或者其他渠道购买的OLED屏幕，都是先找到OLED需要的屏幕资料和驱动代码，如果没有可以找商家要，我们本次驱动的oled为下图的像素为128×64的oled模块。X轴的范围是0-127，单位是列，Y轴的范围是0-63，单位是行。

3，OLED屏幕接线：

// 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 D1 接 PB15 //OLED屏SPI写信号 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

因为D1对应的是数据线，我们可以选择主入从出(MISO)或者主出从入(MISI).这里我们选用的是主出从入(MISI)。

4.代码的移植和修改

bmp.h是图片的代码，oled.c是驱动代码，oled.h是引脚代码，oledfont.h是一些字库和汉字代码

这个时候我们初始化引脚。

1，显示数字(GUI_ShowNum)

* @函数: 显示编号 x: 数字的开始坐标x Y: 数字的起始Y坐标 num: (0 ~ 4294967295) Len: 显示号的长度 大小: 显示编号的大小 模式: 0-白底黑字，1-黑底白字 void GUI_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 Size,u8 mode) { u8 t,temp; u8 enshow=0,csize; if(Size == 16) { csize = Size/2; } else if(Size == 8) { csize = Size/2+2; } else { return; } for(t=0;t<len;t++) { temp=(num/mypow(10,len-t-1))%10; if(enshow==0&&t<(len-1)) { if(temp==0) { GUI_ShowChar(x+csize*t,y,' ',Size,mode); continue; }else enshow=1; } GUI_ShowChar(x+csize*t,y,temp+'0',Size,mode); } }

2，显示字符串(GUI_ShowString)

* @函数:显示英文字符串 * @parameters: x: 英文字符串的起始x坐标 y: 英文字符串的起始y坐标 chr: 英文字符串的起始地址 Char_Size: 显示字符大小 模式: 0-白底黑字，1-黑底白字 GUI_ShowString(28,0,"lxl",16,1); ******************************************************************************/ void GUI_ShowString(u8 x,u8 y,u8 *chr,u8 Char_Size,u8 mode) { unsigned char j=0,csize; if(Char_Size == 16) { csize = Char_Size/2; } else if(Char_Size == 8) { csize = Char_Size/2+2; } else { return; } while (chr[j]!='\0') { GUI_ShowChar(x,y,chr[j],Char_Size,mode); x+=csize; if(x>120) { x=0; y+=Char_Size; } j++; } }

3,显示汉字（GUI_ShowCHinese）

void GUI_ShowCHinese(u8 x,u8 y,u8 hsize,u8 *str,u8 mode) { while(*str!='\0') { if(hsize == 16) { GUI_ShowFont16(x,y,str,mode); } else if(hsize == 24) { GUI_ShowFont24(x,y,str,mode); } else if(hsize == 32) { GUI_ShowFont32(x,y,str,mode); } else { return; } x+=hsize; if(x>WIDTH-hsize) { x=0; y+=hsize; } str+=2; } }

4,oled显示图片

想要让oled显示我们想要的汉字和图形就要使用取模软件

这里给大家推荐一个取模软件

第一步，

第二步，

将生成的16进制的数据复制下来

下面是我们的主函数

int main(void) { Usart_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(); OLED_Clear(0); //清屏（全黑） while (1) { GUI_ShowString(0,0,"helloworld",16,1);//oled显示字符串 GUI_ShowNum(20,20,123456,6,16,1); //oled显示数字 GUI_ShowCHinese(40,40,16,"我",1); //显示汉字 } }

编译并烧录到开发板按线复位键结果如图：

5.最后显示图片

int main(void) { Usart_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(); OLED_Clear(0); //清屏（全黑） while (1) { GUI_DrawBMP(0, 0, 128, 64, BMP6, 1);//显示图片 OLED_Clear(0); } }

将这一大堆数据复制到bmp.h里面(下图为爱心的字模)

unsigned char BMP6[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 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最后的显示效果