【GD32E231 DIY】OLED usage (SPI)

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【GD32E231 DIY】OLED usage (SPI) [Copy link]

This sharing uses SPI to drive the OLED display. The OLED display controller is SSD1306 , which controls the 128X64 dot matrix display.

The structure of SSD1306 is as follows:

GPIO can be used to simulate SPI timing. This example directly uses the SPI function module of the GD32E231C8T6 microcontroller .

Using OLED 's four-wire SPI mode, the timing is:

For detailed information on each pin, see the SSD1306 chip manual.

Use SPI0 to drive the OLED screen, select PB3 and PB5 as SCK and MOSI

Initialize PB3-PB7 :

SPI write byte function:

Set the DC pin to select data or command:

Control chip select terminal:

Control whether to reset:

Write command:

Write data:

OLED initialization function

Refresh video memory:

Write the corresponding dot matrix into the data OLED_GRAM to display the corresponding content.

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