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__TOC__
=Extended IO API=
==XioInit==
Initializes SSI port.


Prototype:

void XioInit(void);



Description:

Setups SSI0 port for transmission to CPLD using 9-bit frames. Must be executed before any extended I/O functions.



==XioWrite==
Write one byte to an extended I/O port


Prototype:

unsigned long XioWrite(unsigned long port, unsigned long data);



Description:

The default CPLD firmare implements ten 8-bit I/O ports XIO_PXA to XIO_PXJ and four internal 8-bit registers XIO_RXA to XIO_RXD. This function allows you to write data to any of those 14 locations.
 ==XioWriteBlock==

Write a block of data to an extended I/O port 


Prototype:

unsigned long XioWriteBlock(unsigned long port, unsigned long* ptr, unsigned long count);


Description:

This function allows you to write extended I/O data in blocks with better performance than byte per byte.
==XioRead==


Read a byte from an extended I/O port


Prototype:

unsigned long XioRead(unsigned long port);


Description:

Allows you to read any of the extended I/O ports (XIO_PXA to XIO_PXJ) or internal registers (XIO_RXA to XIO_RXD).


==XioReadBlock==


Read a block of data into a buffer


Prototype:

unsigned long XioReadBlock(unsigned long port, unsigned long* ptr, unsigned long count);


Description:

This function allows you to read extended I/O data in blocks with better performance than byte per byte.

==IsaInit==


Initialize PC/104 controller


Prototype:

void IsaInit(void);


Description:

Initializes registers to allow the board to be a bus master over the PC/104 bus. Must be executed before other PC/104 functions.


==IsaWrite==
Write data to card at a specified I/O address


Prototype:

unsigned long IsaWrite(unsigned long addr, unsigned long data);


Description:

Writes a byte of data to the expansion card at the specified address.
==IsaWriteBlock==
Write block of data to card at a specified I/O address


Prototype:

unsigned long IsaWriteBlock(unsigned long addr, unsigned long* ptr, unsigned long count);


Description:

This function allows you to write data to PC/104 cards in blocks with better performance than byte per byte.
==IsaRead==
Read data from card at a specified I/O address


Prototype:

unsigned long IsaRead(unsigned long addr);


Description:

Reads a byte of data from the expansion card at the specified address.
==IsaReadBlock==


Read block of data from card at a specified I/O address


Prototype:

unsigned long IsaReadBlock(unsigned long addr, unsigned long* ptr, unsigned long count);


Description:

This function allows you to read from PC/104 cards in blocks with better performance than byte per byte.
==LcdInit==
Initialize HD44780 LCD Controller


Prototype:

void LcdInit(void);


Description:

Initializes the LCD registers. Must be called before any other LCD function. 
==LcdCommand==
Write command byte to LCD


Prototype:

unsigned long LcdCommand(unsigned long data);


Description:

Writes a command to the LCD. Can be used to send commands that are not supported by the current API.
==LcdWrite==
Write data byte to LCD


Prototype:

unsigned long LcdWrite(unsigned long data);


Description:

Writes a data byte to the current position in the LCD display. 
==LcdWriteByte==
Write command byte to LCD


Prototype:

unsigned long LcdWriteByte(unsigned long data, unsigned long ctl);


Description:

Write data to the current position in the LCD display using specific control flags. This is a low level function that is normally not used from applications.
==LcdWriteStr==
Write string to LCD


Prototype:

unsigned long LcdWriteStr(char* str);


Description:

Writes a null terminated string to the current position in the LCD display.
==LcdGoTo==
Position LCD cursor assuming 20x4 display


Prototype:

unsigned long LcdGoTo(unsigned long col, unsigned long row);


Description:

Moves the LCD cursor to the desired column and row.
==LcdWriteAt==
Write string to LCD at a specified coordinate


Prototype:

unsigned long LcdWriteAt(unsigned long col, unsigned long row, char* str)


Description:

Moves the LCD cursor to the desired column and row to write a null terminated string.
==LcdClear==
Clear LCD display


Prototype:

unsigned long LcdClear(void);


Description:

Clears the contents of the LCD display.
==LcdDisplay==
Turn display on or off


Prototype:

unsigned long LcdDisplay(unsigned long val);


Description:

Makes the display data not visible. Data can still be written to the LCD display and it will be visible when the display is turned on.
==LcdCursor==
Turn cursor on or off


Prototype:

unsigned long LcdCursor(unsigned long val);


Description:

Makes a blinking cursor visible at the current display position. 
==LcdBacklight==
Turn backlight on or off


Prototype:

unsigned long LcdBacklight(unsigned long val);


Description:

Turning backlight to improve visibility in dim environments. This will increase power requirements.