Solve the problem that only one line of text is displayed or not displayed in u8glib

The problem we just encountered ,OLED In the use of u8glib When this library , The display is incomplete , I called these two during initialization , Each has its own merits , One is to display only two lines of text, the other is not to display at all

U8G2_SSD1306_128X64_NONAME_2_HW_I2C u8g2(U8G2_R0); // Only two lines are displayed 
U8G2_SSD1306_128X64_VCOMH0_F_HW_I2C u8g2(U8G2_R0); // No display 

 

One reason is that RAM The reason for using up , Therefore, it cannot be displayed normally ,u8g To use hardware I2C, It takes up a lot of RAM Used as a Buffer

 

If say RAM It's not enough , The software can only be used during initialization I2C

U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE); // Slow speed