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星允派F103·

星允派(stm32f103) （二）IIC通信OLED动态显示

meiyaolei

meiyaolei

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使用STM32F103 的I2C 驱动 OLED 动态显示 的详细操作步骤，包含硬件连接、软件实现和动态显示优化方法。

1、原理图 STM32F103OLED屏连接引脚：

OLED屏连接引脚：

OLED参考图，个人以前画的图纸：

2、硬件

硬件了解

OLED 模块：通常使用 SSD1306 驱动芯片，I2C 接口（4 针：VCC、GND、SCL、SDA）。

STM32F103：使用 I2C1 或 I2C2（推荐 I2C1，PB3=SCL, PB5=SDA）。

电路连接：

OLED 的 SCL → STM32 的 PB3（I2C1_SCL）

OLED 的 SDA → STM32 的 PB5（I2C1_SDA）

OLED 的 VCC → 3.3V

OLED 的 GND → GND

上拉电阻：I2C 的 SDA 和 SCL 需要 4.7kΩ 上拉电阻（部分 OLED 模块已集成）。

SSD1306 是一款广泛用于单色 OLED 显示屏的控制器驱动芯片，以下是对其的详细介绍：

基本特性 显示类型：单色（通常为白色、蓝色或黄蓝双色）被动矩阵 OLED (PMOLED)。 分辨率：最大支持 128x64 像素，常见的模块有 128x64 (0.96英寸) 和 128x32 (0.91英寸)。 接口：支持多种通信接口，包括 I2C、SPI (3线或4线) 和并行接口。 内部 RAM (GDDRAM)：芯片内置图形显示数据 RAM (Graphic Display Data RAM)，大小通常为 128x64位 (1KB)。MCU 通过接口将要显示的像素数据写入 GDDRAM，SSD1306 负责根据 GDDRAM 的内容点亮屏幕上的像素点。 工作电压：逻辑电压通常为 3.3V 或 5V，但屏幕驱动电压可能需要内部电荷泵升压。

工作原理 控制方式：通过发送一系列命令来配置显示参数（如对比度、显示开关、地址模式等），并通过发送数据来更新 GDDRAM 内容。 页面结构：GDDRAM 通常按“页 (Page)”组织。对于 128x64 屏幕，通常分为 8 页 (Page 0 ~ Page 7)，每页包含 128 列 x 8 行像素 (128 bytes)。写入数据时，通常需要先设置目标页地址和列地址。 扫描与驱动：SSD1306 通过快速、分时地扫描 COM 线，并根据 GDDRAM 中的数据控制 SEG 线上的电平，来逐行（或逐页）点亮对应的像素。由于人眼的视觉暂留效应，我们感觉整个屏幕是同时亮的。

3、CUBEMX配置

PB3：Signal 为 n/a，GPIO 为 Output High，Maxi 为 No pull High，User L 为 OLED_SCL，Modified 为已勾选。 PB5：Signal 为 n/a，GPIO 为 Output High，Maxi 为 No pull High，User L 为 OLED_SDA，Modified 为已勾选。

Configuration配置区域 GPIO output level：设置为 High。 GPIO mode：设置为 Output Push Pull。 GPIO Pull-up/Pull-down：设置为 No pull-up and no pull-down。 Maximum output speed：设置为 High。 User Label：设置为 OLED_SCL、OLED_SDA。（这个是给IIC引脚自定的名字）

4、软件实现

//显示Hello World，Temperature和25.5C。
OLED_ShowString(0, 0, "Hello World!", 16, 0); 
OLED_ShowString(0, 2, "Temperature:", 16, 0);
OLED_ShowString(80, 4, "25.5C", 16, 1);

//动态图代码
unsigned char BMP2[][294] = {
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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,
},
{ 0X32,0X01,0X00,0X30,0X00,0X30,
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,
0X00,0X00,0X00,0X00,0XC0,0XE0,0XF0,0X08,0X00,0X80,0X80,0X00,0X00,0X00,0X00,0X00,
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,
0X00,0X00,0XFC,0XFF,0XFF,0X07,0X0F,0X3F,0X7F,0X3F,0X1F,0X3F,0XFC,0XF0,0XC0,0X00,
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,
0X60,0XF0,0X10,0XC3,0X2F,0X0C,0XD8,0XD8,0X10,0XD0,0XD8,0XEC,0X2F,0X17,0XF1,0X90,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X1C,0X00,0X16,0X1F,0X01,0X08,0X0A,0X04,0X04,0X07,0X00,0X0F,0X01,0X19,0X12,0X12,
0X1C,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,
},
{ 0X32,0X01,0X00,0X30,0X00,0X30,
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,
0X00,0X00,0X00,0X00,0XC0,0XF0,0XF8,0X0C,0X00,0X80,0X80,0X00,0X00,0X00,0X00,0X00,
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,
0X00,0X00,0XF8,0XFF,0XFF,0X07,0X0F,0X3F,0X7F,0X3F,0X1F,0X3E,0XF8,0XF0,0XC0,0X00,
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,
0X60,0XF0,0X10,0XC3,0X2F,0X0C,0XD8,0XD8,0X10,0XD0,0XD8,0XEC,0X2E,0X17,0XF1,0X90,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X1C,0X00,0X16,0X1F,0X01,0X08,0X0A,0X04,0X04,0X07,0X00,0X0F,0X01,0X19,0X12,0X12,
0X1C,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,
}
};

//显示动态图函数
void OLED_DrawBMP1(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_SetPos(x0,y);
    for(x=x0;x<x1;x++)
        {
            Write_IIC_Data(BMP[j++]);
        }
    }
}

5、显示效果图 显示字条，没有反色的：

25.5C有反色的显示：

6、动态效果图：

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