51 lines
1.6 KiB
Markdown
51 lines
1.6 KiB
Markdown
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---
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title: U8g2
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updated: 2022-01-13 09:11:53Z
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created: 2022-01-08 13:18:07Z
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tags:
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- u8g2
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---
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# 硬件
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小屏为0.66寸的OLED，分辨率64x48，ssd1306通用驱动IC，4线SPI控制（内部BS1为0，不可改IIC），
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构造函数`u8g2_Setup_ssd1306_64x48_er_f`可直接驱动
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`drawGlyph` 绘制特殊文本图标，需联合特殊字体
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取模软件zimo221.exe配置为“横向取模，字节倒序”
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# 内存占用
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初步测试占用ROM约5k+
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# 移植方法：
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1. 移植`u8g2_gpio_and_delay_stm32`
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1. 选择构造函数`u8g2_Setup_ssd1306_64x48_er_f`，后缀f为全屏缓存。**屏蔽其它构造函数**。（针对MDK，STM32cubeide不用屏蔽）
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1. 初始化`u8g2_InitDisplay(&u8g2)`; // send init sequence to the display, display is in sleep mode after this,
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1. 唤醒屏幕`u8g2_SetPowerSave(&u8g2, 0)`; // wake up display
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1. **屏蔽`u8g2_d_memory.c`**，根据报错打开相应函数（针对MDK，STM32cubeide不用屏蔽）
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1. 设置字体`u8g2_SetFont(&u8g2,u8g2_font_5x7_mr)`;//字体文件不用屏蔽
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1. 输出`u8g2_DrawStr(&u8g2,0,14,"123abcABC")`;
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1. 更新屏幕`u8g2_SendBuffer(&u8g2)`;
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# 函数详解
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`u8g2_SetDrawColor`参数详解
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0-清像素模式，即0代表亮
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1-写像素模式，即1代表亮
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2-XOR模式，与当前像素点异或
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灵活利用此参数可实现诸多功能
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**局部清背景**，示例参见非等宽字体在固定坐标刷新 [0.91' OLED显示#刷新问题](../信号源/0.91_%20OLED显示.md#刷新问题)
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**局部反显**，示例参见当前 [0.91' OLED显示#数字反显](../信号源/0.91_%20OLED显示.md#数字反显)
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#u8g2
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