Instruction Set Reference - The HCS12/9S12: An Introduction to Software and Hardware Interfacing - page 817

Prototype Function

Category: time delay
void delay by 10 us (int k);
void delay by 50 us (int k);
void delay by 1 ms (int k);
void delay by 10 ms (int k);
void delay by 100 ms (int k);
void delay by 1 s(int k);

Creates a time delay that is equal to 10 k us
Creates a time delay that is equal to 50 k us
Creates a time delay that is equal to k ms
Creates a time delay that is equal to 10 k ms
Creates a time delay that is equal to 100 k ms
Creates a time delay that is equal to k sec

Category: terminal I/O
int putch(char cx);
int puts(const char *cptr);
int newline(void);
int putsr(char *cptr);
char getch (void);
int gets(char *ptr);

Outputs the character cx to the sci0 port
Outputs the string pointed to by cptr to the sci0 port
Outputs a carriage return followed by a linefeed
Outputs a string stored in SRAM that is pointed to by cptr
Reads a character from the sci0 port using polling method
Reads a string terminated by a carriage return and saves
it in a buffer pointed to by ptr

Category: Data conversion
int int2alpha(int xx, char arr[]); Converts the 16-bit integer xx into a decimal string and

stores it in an array arr[]
Converts the 32-bit integer xx into a decimal string and
stores it in an array arr[]
Converts the ASCII string pointed to by ptr into a 16-bit
binary number
Converts the ASCII string pointed to by ptr into a 32-bit
binary number
Reverses a string that is stored in the character array with
k characters and its sign is indicated by sign

int long2alpha(long xx, char arr[]);

int alpha2int(char *ptr);

long alpha2long(char *ptr);

int reverse(char arr[], int k,
char sign);

Table E.1 ■ Library functions for EGNU IDE

Example E.1
▼

Write a program to convert a 32-bit integer to a string and then output it to the SCI0 port.
Solution: The program is as follows:
#include “c:\egnu\include\hcs12.h”
#include “c:\egnu\include\convert.c”
#include “c:\egnu\include\stdio.c”
const char *msg 1 “Prepare to convert!\n”;
int main(void)
{
long temp;
char buf[20]; /* used to hold the converted ASCII string */

temp 5 993450123; /* number to be converted */

puts(msg); /* output a message */

newline(); /* move to the beginning of the next line */