Microchip Technology SW006022-2N Data Sheet

DS52071B-page 134

 2012 Microchip Technology Inc.

7.6.3.2

FUNCTIONS FOR WRITING

void _ _write_external(unsigned int address,

  unsigned int memory_space,

  void *buffer,

  unsigned int len)

 

This function is a generic Write function and will be called if one of the next functions 
are required but not defined. This function should perform the steps necessary to write 
len

 bytes of memory from the buffer to the external memory named memory_space 

starting at address address.

void _ _write_external8(unsigned int address,

  unsigned int memory_space,

  unsigned char data)

 

Write 8 bits of data to external memory space memory_space starting from address 
address

. The compiler would like to call this function if trying to write an 8-bit sized 

object.

void _ _write_external16(unsigned int address,

  unsigned int memory_space,

  unsigned int data)

 

Write 16 bits of data to external memory space memory_space starting from address 
address

. The compiler would like to call this function if trying to write an 16-bit sized 

object.

void _ _write_external32(unsigned int address,

  unsigned int memory_space,

  unsigned long data)

 

Write 32 bits of data to external memory space memory_space starting from address 
address

. The compiler would like to call this function if trying to write a 32-bit sized 

object, such as a long or float type.

void _ _write_external64(unsigned int address,

  unsigned int memory_space,

  unsigned long long data)

 

Write 64 bits of data to external memory space memory_space starting from address 
address

. The compiler would like to call this function if trying to write a 64-bit sized 

object, such as a long long or long double type.