main.c

这个文件是西门子16位单片机从c166上的一些应用程序的源代码

#include <XC161.H>
#include <stdio.h>

#define VREF	5			/* Voltage Reference */

void main ( void )  {                     

                                     /* initialize the serial interface               */
#ifndef Monitor                      /* do not initialize if you use Monitor-166      */  
  P3  |= 0x0400;                     /* SET PORT 3.10 OUTPUT LATCH (TXD)              */
  DP3 |= 0x0400;                     /* SET PORT 3.10 DIRECTION CONTROL (TXD OUTPUT)  */
  DP3 &= 0xF7FF;                     /* RESET PORT 3.11 DIRECTION CONTROL (RXD INPUT) */
  ASC0_TIC = 0x80;                   /* SET TRANSMIT INTERRUPT FLAG                   */
  ASC0_RIC = 0x00;                   /* DELETE RECEIVE INTERRUPT FLAG                 */
  ASC0_BG  = 0x40;                   /* SET BAUDRATE TO 9600 BAUD @ 20MHz             */
  ASC0_CON = 0x8011;                 /* SET SERIAL MODE                               */
  ALTSEL0P3 |= 0x0C00;               /* Configure port pins for serial interface 0    */
#endif

/* A/D Converter */
                    
while (1){
 
/* Init ADC	 */
  ADC_CON = 0x80;                     /*  Enable A/D converter           	             */
                                      /*	Start Convert on AD0BUSY set			  	       */
 
 ADC_CON_ADBSY = 1;	                  /*  Start ADC conversion						             */
  while (ADC_CON_ADBSY);              /*  Wait for conversion							             */

/* Output 0-1023 ADDAT value without using floating-point */
  printf ("ADDAT Value %4u = %01u.%04u Volts\r",
         (unsigned) ADC_DAT,
         (unsigned) (ADC_DAT * VREF) >> 10,                          /* Output Integer Portion */
         (unsigned) ((ADC_DAT * VREF * 10000UL) >> 10UL) % 10000);   /* Output Decimal Portion */            
      
  }  
}