Z-World XP8900 Manual de usuario descargar pdf (Pagina 52)

PK2100

5-10 s Software Reference

 void lc_wait()

Waits for the LCD to become free (i.e., not busy).

EEPROM Read / Write

 int ee_rd( int address )

Reads EEPROM at specified address and returns result in lower byte.

Returns 1 if EEPROM is not functioning.

 int ee_wr( int address, char data )

Writes character data at address in EEPROM. Returns 1 if EEPROM

is not functioning.

 int eei_rd( int address )

Reads EEPROM integer (2 bytes, least significant byte first) at address

specified. Does not return a distinct error code if EEPROM fails.

Flash EPROM Write

 int WriteFlash( ulong addr, char* buf,

int num )

Writes num bytes from buf to flash EPROM, starting at addr. The

term addr is an absolute physical address.

To do this with Dynamic C, allocate flash data in Dynamic C by

declaring initialized variables or arrays, or initialized xdata. The data

name for xdata must be passed directly to the function

xdata my_data { 0, 0xFF, 0x08 };

. . .

WriteFlash { my_data, my_buffer, my_count };

For normal data, pass the physical address of the data to the function

char xxx[ ] = { 0, 0xFF, 0x08 };

. . .

WriteFlash { phy_adr(xxx), my_buffer, my_count };

The function returns

0 if the operation is successful,

-1 if no flash EPROM is present,

-2 if a physical address is within the BIOS area,

-3 if a physical address is within the symbol table, or

-4 if the write times out.

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Z-World XP8900 Manual de usuario Pagina 52