Silicon Laboratories Stepper Machine Instrukcja Użytkownika Pobierz pdf (Strona 24)

AN155

24 Rev. 1.1

// BUFFERED UART FUNCTION PROTOTYPES

//--Top Level - User Functions ------------------------------------------------

// put a string into transmit buffer, used to display text messages

void puts (char *);

// converts a 16 bit number to a string of ASCII characters

// and stores the characaters into the transmit buffer

void putuint(unsigned int);

// converts an 8 bit number to a string of ASCII characters

// and stores the characaters into the transmit buffer

void putuchar(unsigned char);

// retrieves ASCII characters from the receiver buffer

// and converts a string of digits into an 8-bit number

unsigned char getuchar(void);

// retrieves ASCII characters from the receiver buffer

// and converts a string of digits into an 16bit number

unsigned int getuint(void);

void newline(void); // outputs carriage return & line feed

//----------Middle Level - Primitive User Functions ---------------------------

// retrieves one character from the receive buffer using readc and echoes

// the character to the transmit buffer

char getc (void);

// stores one character into the transmit buffer using writec

void putc (char);

void readClear(void); // clears read buffer

void writeClear(void); // clears write buffer

//----------------Lowest level - Hardware access functions --------------------

char readc (void); // pulls one character directly

// from the receive buffer

void writec (char); // writes one character directly

// to the transmit buffer

//-----------------------------------------------------------------------------

// Global VARIABLES

//-----------------------------------------------------------------------------

// user interface variables

sbit LED = P0 ^ 6; // bit set high to turn LED on

// Stepper Motor Variables

unsigned int Position; // current motor position

unsigned char TableIndex; // index for stepper motor table

unsigned char MaxTableIndex; // maximum index for desired profile

unsigned int SlewCount; // down counter for slewing phase

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Silicon Laboratories Stepper Machine Instrukcja Użytkownika Strona 24