Modifications

Then the following functions are available:

Then the following functions are available:

== serialOpen ==

=== serialOpen ===

  int serialOpen (char *device, int baud) ;

  int serialOpen (char *device, int baud) ;

This opens and initialises the serial device and sets the baud rate. It sets the port into “raw” mode (character at a time and no translations), and sets the read timeout to 10 seconds. The return value is the file descriptor or -1 for any error, in which case errno will be set as appropriate.

This opens and initialises the serial device and sets the baud rate. It sets the port into “raw” mode (character at a time and no translations), and sets the read timeout to 10 seconds. The return value is the file descriptor or -1 for any error, in which case errno will be set as appropriate.

== serialClose ==

=== serialClose ===

  void serialClose (int fd) ;

  void serialClose (int fd) ;

Closes the device identified by the file descriptor given.

Closes the device identified by the file descriptor given.

== serialPutChar==

=== serialPutChar ===

  void  serialPutchar (int fd, unsigned char c) ;

  void  serialPutchar (int fd, unsigned char c) ;

Sends the single byte to the serial device identified by the given file descriptor.

Sends the single byte to the serial device identified by the given file descriptor.

== serialPuts ==

=== serialPuts ===

  void  serialPuts (int fd, char *s) ;

  void  serialPuts (int fd, char *s) ;

Sends the nul-terminated string to the serial device identified by the given file descriptor.

Sends the nul-terminated string to the serial device identified by the given file descriptor.

== serialPrintf ==

=== serialPrintf ===

  void  serialPrintf (int fd, char *message, …) ;

  void  serialPrintf (int fd, char *message, …) ;

Emulates the system printf function to the serial device.

Emulates the system printf function to the serial device.

== serialDataAvail ==

=== serialDataAvail ===

  int serialDataAvail (int fd) ;

  int serialDataAvail (int fd) ;

Returns the number of characters available for reading, or -1 for any error condition, in which case errno will be set appropriately.

Returns the number of characters available for reading, or -1 for any error condition, in which case errno will be set appropriately.

== serialGetChar ==

=== serialGetChar ===

   int serialGetchar (int fd) ;

   int serialGetchar (int fd) ;

Returns the next character available on the serial device. This call will block for up to 10 seconds if no data is available (when it will return -1)

Returns the next character available on the serial device. This call will block for up to 10 seconds if no data is available (when it will return -1)

== serialFlush ==

=== serialFlush ===

   void serialFlush(int fd);

   void serialFlush(int fd);