User manual

LPCXpresso Experiment Kit - User’s Guide

Page 124

Figure 68 illustrates how the display is connected to the LPCXpresso Experiment board via a 14-pos

cable.

Figure 68 – 1.5 inch RGB OLED Connected via Serial Expansion Connector

In the preparation a number of defines (SEC14_PIN*) were defined. Each module that is connected via

the serial expansion connector can setup its own list of pins depending on needs. For the OLED

module it will be:

#define OLED_SSEL_PORT SEC14_PIN6_PORT

#define OLED_SSEL_PIN SEC14_PIN6_PIN

#define OLED_RESET_PORT SEC14_PIN12_PORT

#define OLED_RESET_PIN SEC14_PIN12_PIN

#define OLED_DC_PORT SEC14_PIN11_PORT

#define OLED_DC_PIN SEC14_PIN11_PIN

#define OLED_SD_PORT SEC14_PIN14_PORT

#define OLED_SD_PIN SEC14_PIN14_PIN

The advantage of this approach is that if the LPCXpresso LPC111x board is replaced with a different

one then the pin/port information only has to be changed for the SEC14_* defines – the connected

modules will remain unchanged.

The SSD1315 controller chip is complex and creating a driver from scratch is out-of-scope for this

exercise. Instead a number of ready drivers are give, see list below. These files must be

copied/imported into the project.

 draw.c/h – basic graphical drawing primitives

 oled.c/h – OLED initialization function

 ssd1315.c/h – OLED controller driver

Below a code segment is given that serves as base for the program in this experiment.

static void rainbow(draw_lcd_t *lcd)

{

// White => 0~15

draw_fillRectangle(lcd, 0, 0, 15, 127, 0xffff);

// Yellow => 16~31

...