Arizona Picdem 17 User Manual

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 2001 Microchip Technology Inc.

DS39024B-page 59

//****************************************************

//*   USART.C

//****************************************************

//*   Rodger Richey

//*   Principal Applications Engineer

//*   Microchip Technology Incorporated

//****************************************************

//*   2 December 1998

//*   Compiled using MPLAB C17 C Compiler V2.20

//****************************************************

//*   This program prints an incrementing count from

//*   0 to 255 to the USART. The numbers are displayed

//*   in the Monitor program.

//****************************************************

//*   Uses an oscillator of 16MHz

//****************************************************

#include <p17c756.h>

#include <delays.h>

#include <usart16.h>

#include <stdlib.h>

void PutsUSART2(char *data);

// Function to print a string to USART2 using handshaking

void PutsUSART2(char *data)

{

do

{

// Wait for USART to complete prev operation

while(BusyUSART2());

// Hardware handshaking for CTS

while(PORTBbits.RB4);

// Print a character to USART2

putcUSART2(*data);

} while(*data++);  // Increment pointer and check for NULL

return;

}

void main(void)

{

unsigned char i;

char str[5];

char crlf[3];

// Initialize the carriage return/linefeed string

crlf[0] = 0x0d;

crlf[1] = 0x0a;

crlf[2] = 0;

// Initialize USART2 and the hardware handshaking lines

PORTBbits.RB5 = 1;

DDRBbits.RB5 = 0;