4.3.3 OLED Display
OLED1 Xplained Pro features a 128 x 32 pixel white monochrome OLED display, UG-2832HSWEG04, from WiseChip Semiconductor Inc. The display has a SSD1306 display controller by Solomon Systech built in and is controlled via a 4-wire SPI interface + reset with the signals described in the table below. The data sheets for the display module or the display controller is not publicly available and has to be acquired from the respective manufacturers.
Info:
Note that the OLED display does not have a SPI MISO signal. That means that data can only be written to the display, not read.
| Pin On EXT Connector | Signal Name | Description |
|---|---|---|
| 16 | SPI_MOSI | SPI master out, slave in signal. Used to write data to the display. |
| 18 | SPI_SCK | SPI clock signal, generated by the master. |
| 5 | DATA_CMD_SEL | Data/command select. Used to choose whether the communication is data to the display memory or a command to the LCD controller. |
| 15 | DISPLAY_SS | SPI slave select signal, must be held low during SPI communication. |
| 10 | DISPLAY_RESET | Reset signal to the OLED display, active-low. Used during initialization of the display. |