Datasheet

chipKIT™ Basic I/O Shield™ Reference Manual

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Page 9 of 13

Appendix B: Example Driver Code

The following gives an example of code that initializes the display controller and writes the contents of a memory

buffer into the display. This example is written for the chipKIT Uno32 board.

Symbol and Variable Declarations

/* ------------------------------------------------------------ */

/* Pin definitions for access to OLED control signals on chipKIT Uno32

#define prtVddCtrl IOPORT_F

#define prtVbatCtrl IOPORT_F

#define prtDataCmd IOPORT_F

#define prtReset IOPORT_G

#define bitVddCtrl BIT_6

#define bitVbatCtrl BIT_5

#define bitDataCmd BIT_4

#define bitReset BIT_9

/* ------------------------------------------------------------ */

/* Symbols describing the geometry of the display.

#define cbOledDispMax 512 //max number of bytes in display buffer

#define ccolOledMax 128 //number of display columns

#define crowOledMax 32 //number of display rows

#define cpagOledMax 4 //number of display memory pages

/* ------------------------------------------------------------ */

/* This array is the off-screen frame buffer used for rendering.

** It isn't possible to read back from the OLED display device,

** so display data is rendered into this off-screen buffer and then

** copied to the display.

BYTE rgbOledBmp[cbOledDispMax];

PIC32 Hardware Initialization

The following function initializes the PIC32 hardware for talking to the display. It initializes the SPI controller and

sets the control pins to be outputs.

/* ------------------------------------------------------------ */

/*** OledHostInit

** Parameters:

** none

** Return Value:

** none

** Errors:

** none

** Description:

** Perform PIC32 device initialization to prepare for use

** of the OLED display.

** This example is hard coded for the chipKIT Uno32 and

** SPI2.