Karl Zweimüller / UniGraphic

UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC

Dependents:   UniGraphic-St7920-Test AfficheurUTILECO

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I2C_bus Class Reference
Public Member Functions | Protected Member Functions

I2C_bus Class Reference

I2C interface. More...

#include <I2C_bus.h>

Inherits Protocols.

Public Member Functions

 I2C_bus (int Hz, int address, PinName sda, PinName scl, PinName reset=NC)
 Create an I2C display interface.

Protected Member Functions

virtual void wr_cmd8 (unsigned char cmd)
 Send 8bit command to display controller.
virtual void wr_data8 (unsigned char data)
 Send 8bit data to display controller.
virtual void wr_cmd16 (unsigned short cmd)
 Send 2x8bit command to display controller.
virtual void wr_data16 (unsigned short data)
 Send 2x8bit data to display controller.
virtual void wr_gram (unsigned short data)
 Send 16bit pixeldata to display controller.
virtual void wr_gram (unsigned short data, unsigned int count)
 Send same 16bit pixeldata to display controller multiple times.
virtual void wr_grambuf (unsigned short *data, unsigned int lenght)
 Send array of pixeldata shorts to display controller.
virtual unsigned short rd_gram (bool convert)
 Read 16bit pixeldata from display controller (with dummy cycle)
virtual unsigned int rd_reg_data32 (unsigned char reg)
 Read 4x8bit register data ( reading from display ia I2C is not implemented in most controllers !
virtual unsigned int rd_extcreg_data32 (unsigned char reg, unsigned char SPIreadenablecmd)
 Read 3x8bit ExtendedCommands register data reading from display ia I2C is not implemented in most controllers !
virtual void dummyread ()
 ILI932x specific, does a dummy read cycle, number of bits is protocol dependent reading from display ia I2C is not implemented in most controllers !
virtual void reg_select (unsigned char reg, bool forread=false)
 ILI932x specific, select register for a successive write or read.
virtual void reg_write (unsigned char reg, unsigned short data)
 ILI932x specific, write register with data.
virtual unsigned short reg_read (unsigned char reg)
 ILI932x specific, read register.
virtual void hw_reset ()
 HW reset sequence (without display init commands) most I2C displays have no reset signal !
virtual void BusEnable (bool enable)
 Set ChipSelect high or low.

Detailed Description

I2C interface.

Definition at line 9 of file I2C_bus.h.

Constructor & Destructor Documentation

I2C_bus ( int  Hz,
int  address,
PinName  sda,
PinName  scl,
PinName  reset = NC 
)

Create an I2C display interface.

Parameters:
I2Cfrquency
I2Caddress
I2Cpin sda
I2Cpin scl
resetpin connected to RESET of display

Definition at line 16 of file I2C_bus.cpp.

Member Function Documentation

void BusEnable ( bool  enable ) [protected, virtual]

Set ChipSelect high or low.

Parameters:
enable0/1 not implemented for I2C !

Implements Protocols.

Definition at line 107 of file I2C_bus.cpp.

void dummyread (  ) [protected, virtual]

ILI932x specific, does a dummy read cycle, number of bits is protocol dependent reading from display ia I2C is not implemented in most controllers !

Implements Protocols.

Definition at line 125 of file I2C_bus.cpp.

void hw_reset (  ) [protected, virtual]

HW reset sequence (without display init commands) most I2C displays have no reset signal !

Implements Protocols.

Definition at line 99 of file I2C_bus.cpp.

unsigned int rd_extcreg_data32 ( unsigned char  reg,
unsigned char  SPIreadenablecmd 
) [protected, virtual]

Read 3x8bit ExtendedCommands register data reading from display ia I2C is not implemented in most controllers !

Implements Protocols.

Definition at line 120 of file I2C_bus.cpp.

unsigned short rd_gram ( bool  convert ) [protected, virtual]

Read 16bit pixeldata from display controller (with dummy cycle)

Parameters:
converttrue/false. Convert 18bit to 16bit, some controllers returns 18bit
Returns:
16bit color

Implements Protocols.

Definition at line 129 of file I2C_bus.cpp.

unsigned int rd_reg_data32 ( unsigned char  reg ) [protected, virtual]

Read 4x8bit register data ( reading from display ia I2C is not implemented in most controllers !

Implements Protocols.

Definition at line 115 of file I2C_bus.cpp.

unsigned short reg_read ( unsigned char  reg ) [protected, virtual]

ILI932x specific, read register.

Parameters:
regregister to be read
Returns:
16bit register value not implemented for I2C !

Implements Protocols.

Definition at line 134 of file I2C_bus.cpp.

void reg_select ( unsigned char  reg,
bool  forread = false 
) [protected, virtual]

ILI932x specific, select register for a successive write or read.

reading from display ia I2C is not implemented in most controllers !

Implements Protocols.

Definition at line 111 of file I2C_bus.cpp.

void reg_write ( unsigned char  reg,
unsigned short  data 
) [protected, virtual]

ILI932x specific, write register with data.

Parameters:
regregister to write
data16bit data not implemented for I2C !

Implements Protocols.

Definition at line 139 of file I2C_bus.cpp.

void wr_cmd16 ( unsigned short  cmd ) [protected, virtual]

Send 2x8bit command to display controller.

Parameters:
cmd,:halfword to send
Note:
in SPI_16 mode a single 16bit transfer will be done

Implements Protocols.

Definition at line 39 of file I2C_bus.cpp.

void wr_cmd8 ( unsigned char  cmd ) [protected, virtual]

Send 8bit command to display controller.

Parameters:
cmd,:byte to send

Implements Protocols.

Definition at line 25 of file I2C_bus.cpp.

void wr_data16 ( unsigned short  data ) [protected, virtual]

Send 2x8bit data to display controller.

Parameters:
data,:halfword to send
Note:
in SPI_16 mode a single 16bit transfer will be done

Implements Protocols.

Definition at line 48 of file I2C_bus.cpp.

void wr_data8 ( unsigned char  data ) [protected, virtual]

Send 8bit data to display controller.

Parameters:
data,:byte to send

Implements Protocols.

Definition at line 32 of file I2C_bus.cpp.

void wr_gram ( unsigned short  data ) [protected, virtual]

Send 16bit pixeldata to display controller.

Parameters:
data,:halfword to send

Implements Protocols.

Definition at line 53 of file I2C_bus.cpp.

void wr_gram ( unsigned short  data,
unsigned int  count 
) [protected, virtual]

Send same 16bit pixeldata to display controller multiple times.

Parameters:
data,:halfword to send
count,:how many

Implements Protocols.

Definition at line 58 of file I2C_bus.cpp.

void wr_grambuf ( unsigned short *  data,
unsigned int  lenght 
) [protected, virtual]

Send array of pixeldata shorts to display controller.

Parameters:
data,:unsigned short pixeldata array
lenght,:lenght (in shorts)

Implements Protocols.

Definition at line 83 of file I2C_bus.cpp.

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