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A fork with some I2C optimizations that speed up the display.

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SSD1308 Class Reference
Public Member Functions

SSD1308 Class Reference

Class to control an SSD1308 based oled Display. More...

#include <SSD1308.h>

Public Member Functions

 SSD1308 (I2C &i2c, uint8_t address=SSD1308_DEF_SA)
 Constructor.
void initialize ()
 High level Init, most settings remain at Power-On reset value.
void clearDisplay ()
 clear the display
void fillDisplay (uint8_t pattern=0x00, uint8_t start_page=0, uint8_t end_page=MAX_PAGE, uint8_t start_col=0, uint8_t end_col=MAX_COL)
 fill the display
void writeBitmap (uint8_t *data, uint8_t start_page=0, uint8_t end_page=MAX_PAGE, uint8_t start_col=0, uint8_t end_col=MAX_COL)
 write a bitmap to the display
void writeProgressBar (uint8_t page, uint8_t col, int percentage)
 write a level meter to the display, Width is (PRG_MAX_SCALE + 2) pixels
void writeLevelBar (uint8_t page, uint8_t col, int percentage)
 write a level meter to the display, Width is (PRG_MAX_SCALE + 2) pixels
void writeChar (char chr)
 Write single character to the display using the 8x8 fontable.
void writeBigChar (uint8_t row, uint8_t col, char chr)
 Write large character (16x24 font)
void writeString (uint8_t row, uint8_t col, const char *txt)
 Write a string to the display using the 8x8 font.
void setHorizontalAddressingMode ()
 Set Horizontal Addressing Mode (cursor incr left-to-right, top-to-bottom)
void setVerticalAddressingMode ()
 Set Vertical Addressing Mode (cursor incr top-to-bottom, left-to-right)
void setPageAddressingMode ()
 Set Page Addressing Mode (cursor incr left-to-right)
void setMemoryAddressingMode (uint8_t mode)
 Set Addressing Mode.
void setColumnStartForPageAddressingMode (uint8_t column)
 Set Column Start (for Page Addressing Mode only)
void setPageStartForPageAddressingMode (uint8_t page)
 Set Page Start (for Page Addressing Mode only)
void setColumnAddress (uint8_t start, uint8_t end)
void setPageAddress (uint8_t start, uint8_t end)
void setDisplayStartLine (uint8_t line)
 Set Display StartLine, takes one byte, 0x00-0x3F.
void setContrastControl (uint8_t contrast)
 Set Contrast.
void setEntireDisplayOn ()
 Shows All Pixels On.
void setEntireDisplayRAM ()
 Shows Pixels as RAM content.
void setEntireDisplay (bool on)
 Shows Pixels On or as RAM content.
void setInternalIref ()
 Sets Internal Iref.
void setExternalIref ()
 Sets External Iref (default)
void setDisplayOn ()
 Enable Display.
void setDisplayOff ()
 Disable Display.
void setDisplayPower (bool on)
 Enable or Disable Display.
void setDisplayNormal ()
 Show White pixels on Black background.
void setDisplayInverse ()
 Show Black pixels on White background.
void setDisplayBlink (bool on)
 Blink display by fading in and out over a set number of frames.
void setDisplayFade (bool on)
 Fade out display in set number of frames.
void setDisplayFlip (bool left, bool down)
 Display Flip (Left/Right, Up/Down)
void setContinuousHorizontalScroll (bool left, uint8_t start_page, uint8_t end_page, uint8_t interval)
 Horizontal scroll by one column per interval.
void setContinuousVerticalAndHorizontalScroll (bool left, uint8_t start_page, uint8_t end_page, uint8_t offset, uint8_t interval)
 Horizontal and Vertical scroll by one column per interval.
void setDisplayScroll (bool on)
 Activate or Deactivate Horizontal and Vertical scroll.
void setVerticalScrollArea (uint8_t topRowsFixed, uint8_t scrollRows)
 Set Vertical scroll area.

Detailed Description

Class to control an SSD1308 based oled Display.

Example: 

 #include "mbed.h"
 #include "mbed_logo.h"
 #include "SSD1308.h"
 
 //Pin Defines for I2C Bus
 #define D_SDA                  p28
 #define D_SCL                  p27
 I2C i2c(D_SDA, D_SCL);

 // Host PC Communication channels
 Serial pc(USBTX, USBRX); // tx, rx

 // Instantiate OLED
 SSD1308 oled = SSD1308(i2c, SSD1308_SA0);
 
 int main() {
   pc.printf("OLED test start\r");  
   oled.writeString(0, 0, "Hello World !");
   //  oled.printf("Hello World !");
 
   oled.fillDisplay(0xAA);
   oled.setDisplayOff();
   wait(1);   
   oled.setDisplayOn();
 
   oled.clearDisplay();
   oled.setDisplayInverse();
   wait(0.5);
   oled.setDisplayNormal();                                         

   oled.writeBitmap((uint8_t*) mbed_logo);

   pc.printf("OLED test done\r\n");  
 }

Definition at line 219 of file SSD1308.h.

Constructor & Destructor Documentation

SSD1308 ( I2C &  i2c,
uint8_t  deviceAddress = SSD1308_DEF_SA 
)

Constructor.

Parameters:
I2C&i2c reference to i2c,
uint8_tdeviceAddress slaveaddress (8bit to use for the controller (0x78 by default, assumes D/C# (pin 13) grounded)
I2C&i2c reference to i2c
uint8_tdeviceAddress slaveaddress

Definition at line 65 of file SSD1308.cpp.

Member Function Documentation

void clearDisplay (  )

clear the display

Definition at line 90 of file SSD1308.cpp.

void fillDisplay ( uint8_t  pattern = 0x00,
uint8_t  start_page = 0,
uint8_t  end_page = MAX_PAGE,
uint8_t  start_col = 0,
uint8_t  end_col = MAX_COL 
)

fill the display

Parameters:
uint8_tpattern fillpattern vertical patch or 8 bits
uint8_tstart_page begin page (0..MAX_PAGE)
uint8_tend_page end page (start_page..MAX_PAGE)
uint8_tstart_col begin column (0..MAX_COL)
uint8_tend_col end column (start_col..MAX_COL)

Definition at line 139 of file SSD1308.cpp.

void initialize (  )

High level Init, most settings remain at Power-On reset value.

Definition at line 75 of file SSD1308.cpp.

void setColumnAddress ( uint8_t  start,
uint8_t  end 
)
Parameters:
uint8_tstart startcolumn (valid range 0..MAX_COL)
uint8_tend endcolumn (valid range start..MAX_COL)

Definition at line 768 of file SSD1308.cpp.

void setColumnStartForPageAddressingMode ( uint8_t  column )

Set Column Start (for Page Addressing Mode only)

Parameters:
uint8_tcolumn column start (valid range 0..MAX_COLS)
uint8_tcolumn column start (valid range 0..MAX_COL)

Definition at line 789 of file SSD1308.cpp.

void setContinuousHorizontalScroll ( bool  left,
uint8_t  start_page,
uint8_t  end_page,
uint8_t  interval 
)

Horizontal scroll by one column per interval.

Parameters:
boolleft select Left/Right scroll
uint8_tstart_page begin page (0..MAX_PAGE)
uint8_tend_page end page (start_page..MAX_PAGE)
uint8_tinterval scroll interval in frames (see codes above)

Definition at line 953 of file SSD1308.cpp.

void setContinuousVerticalAndHorizontalScroll ( bool  left,
uint8_t  start_page,
uint8_t  end_page,
uint8_t  offset,
uint8_t  interval 
)

Horizontal and Vertical scroll by one column per interval.

Parameters:
boolleft select Left/Right scroll
uint8_tstart_page begin page (0..MAX_PAGE)
uint8_tend_page end page (start_page..MAX_PAGE)
uint8_toffset vert offset (0x01..0x63)
uint8_tinterval scroll interval in frames (see codes above)

Definition at line 971 of file SSD1308.cpp.

void setContrastControl ( uint8_t  contrast )

Set Contrast.

Parameters:
uint8_tcontrast (valid range 0x00 (lowest) - 0xFF (highest))

Definition at line 814 of file SSD1308.cpp.

void setDisplayBlink ( bool  on )

Blink display by fading in and out over a set number of frames.

Parameters:
boolon

Definition at line 857 of file SSD1308.cpp.

void setDisplayFade ( bool  on )

Fade out display in set number of frames.

Parameters:
boolon

Definition at line 870 of file SSD1308.cpp.

void setDisplayFlip ( bool  left,
bool  down 
)

Display Flip (Left/Right, Up/Down)

Parameters:
boolleft flip Left/Right
booldown flip Up/Down

Definition at line 883 of file SSD1308.cpp.

void setDisplayInverse (  )

Show Black pixels on White background.

Definition at line 850 of file SSD1308.cpp.

void setDisplayNormal (  )

Show White pixels on Black background.

Definition at line 844 of file SSD1308.cpp.

void setDisplayOff (  )

Disable Display.

Definition at line 827 of file SSD1308.cpp.

void setDisplayOn (  )

Enable Display.

Definition at line 821 of file SSD1308.cpp.

void setDisplayPower ( bool  on )

Enable or Disable Display.

Parameters:
boolon

Definition at line 834 of file SSD1308.cpp.

void setDisplayScroll ( bool  on )

Activate or Deactivate Horizontal and Vertical scroll.

Note: after deactivating scrolling, the RAM data needs to be rewritten

Parameters:
boolon activate scroll

Definition at line 999 of file SSD1308.cpp.

void setDisplayStartLine ( uint8_t  line )

Set Display StartLine, takes one byte, 0x00-0x3F.

Parameters:
uint8_tline startline (valid range 0..MAX_ROWS)

Definition at line 777 of file SSD1308.cpp.

void setEntireDisplay ( bool  on )

Shows Pixels On or as RAM content.

Parameters:
boolon (true is All on, false is RAM content)

Definition at line 937 of file SSD1308.cpp.

void setEntireDisplayOn (  )

Shows All Pixels On.

Definition at line 924 of file SSD1308.cpp.

void setEntireDisplayRAM (  )

Shows Pixels as RAM content.

Definition at line 930 of file SSD1308.cpp.

void setExternalIref (  )

Sets External Iref (default)

Definition at line 915 of file SSD1308.cpp.

void setHorizontalAddressingMode (  )

Set Horizontal Addressing Mode (cursor incr left-to-right, top-to-bottom)

Definition at line 729 of file SSD1308.cpp.

void setInternalIref (  )

Sets Internal Iref.

Definition at line 906 of file SSD1308.cpp.

void setMemoryAddressingMode ( uint8_t  mode )

Set Addressing Mode.

Parameters:
uint8_tmode

Definition at line 750 of file SSD1308.cpp.

void setPageAddress ( uint8_t  start,
uint8_t  end 
)
Parameters:
uint8_tstart startpage (valid range 0..MAX_PAGE)
uint8_tend endpage (valid range start..MAX_PAGE)

Definition at line 759 of file SSD1308.cpp.

void setPageAddressingMode (  )

Set Page Addressing Mode (cursor incr left-to-right)

Definition at line 743 of file SSD1308.cpp.

void setPageStartForPageAddressingMode ( uint8_t  page )

Set Page Start (for Page Addressing Mode only)

Parameters:
uint8_tpage page start (valid range PAGE0 - PAGE7)

Definition at line 802 of file SSD1308.cpp.

void setVerticalAddressingMode (  )

Set Vertical Addressing Mode (cursor incr top-to-bottom, left-to-right)

Definition at line 736 of file SSD1308.cpp.

void setVerticalScrollArea ( uint8_t  topRowsFixed,
uint8_t  scrollRows 
)

Set Vertical scroll area.

Parameters:
uint8_ttopRowsFixed fixed rows (0..MAX_ROW)
uint8_tscrollRowsoffset scroll rows (topRowsFixed..MAX_ROW)
uint8_ttopRowsFixed fixed rows (0..MAX_ROW)
uint8_tscrollRowsoffset scroll rows (topRowsFixed..ROWS)

Definition at line 986 of file SSD1308.cpp.

void writeBigChar ( uint8_t  row,
uint8_t  col,
char  chr 
)

Write large character (16x24 font)

Parameters:
uint8_trow row number (0...MAX_ROW)
uint8_tcol column number (0...MAX_COL)
charchr Used for displaying numbers 0 - 9 and '+', '-', '.'

Definition at line 484 of file SSD1308.cpp.

void writeBitmap ( uint8_t *  data,
uint8_t  start_page = 0,
uint8_t  end_page = MAX_PAGE,
uint8_t  start_col = 0,
uint8_t  end_col = MAX_COL 
)

write a bitmap to the display

Parameters:
uint8_t*data pointer to bitmap
uint8_tstart_page begin page (0..MAX_PAGE)
uint8_tend_page end page (start_page..MAX_PAGE)
uint8_tstart_col begin column (0..MAX_COL)
uint8_tend_col end column (start_col..MAX_COL)

Definition at line 195 of file SSD1308.cpp.

void writeChar ( char  chr )

Write single character to the display using the 8x8 fontable.

Start at current cursor location

Parameters:
charchr character to write

Definition at line 420 of file SSD1308.cpp.

void writeLevelBar ( uint8_t  page,
uint8_t  col,
int  percentage 
)

write a level meter to the display, Width is (PRG_MAX_SCALE + 2) pixels

Parameters:
uint8_tpage begin page (0..MAX_PAGE)
uint8_tcol begin column (0..MAX_COL)
intpercentage value (0..100)

Definition at line 339 of file SSD1308.cpp.

void writeProgressBar ( uint8_t  page,
uint8_t  col,
int  percentage 
)

write a level meter to the display, Width is (PRG_MAX_SCALE + 2) pixels

Parameters:
uint8_tpage begin page (0..MAX_PAGE)
uint8_tcol begin column (0..MAX_COL)
intpercentage value (0..100)

Definition at line 255 of file SSD1308.cpp.

void writeString ( uint8_t  row,
uint8_t  col,
const char *  text 
)

Write a string to the display using the 8x8 font.

Start at selected cursor location, text will wrap around until it is done

Parameters:
uint8_trow row number (0...ROWS/FONT_HEIGHT)
uint8_tcol column number (0...COLUMNS/FONT_WIDTH)
constchar * text pointer to text

Definition at line 444 of file SSD1308.cpp.

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