ex_admm.c

TI公司的CCS一些常用的函数库

/////////////////////////////////////////////////////////////////////////
////                          EX_ADMM.C                              ////
////                                                                 ////
////  This program displays the min and max of 30 A/D samples over   ////
////  the RS-232 interface.  The process is repeated forever.        ////
////                                                                 ////
////  Configure the CCS prototype card as follows:                   ////
////     Insert jumpers from 9 to 15                                 ////
////     Use the #9 POT to vary the voltage.                         ////
////     See additional connections below.                           ////
////                                                                 ////
////  This example will work with the PCM and PCH compilers.  The    ////
////  following conditional compilation lines are used to include a  ////
////  valid device for each compiler.  Change the device, clock and  ////
////  RS232 pins for your hardware if needed.                        ////
/////////////////////////////////////////////////////////////////////////
////        (C) Copyright 1996,2003 Custom Computer Services         ////
//// This source code may only be used by licensed users of the CCS  ////
//// C compiler.  This source code may only be distributed to other  ////
//// licensed users of the CCS C compiler.  No other use,            ////
//// reproduction or distribution is permitted without written       ////
//// permission.  Derivative programs created using this software    ////
//// in object code form are not restricted in any way.              ////
/////////////////////////////////////////////////////////////////////////


#if defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)  // Jumpers: 8 to 11, 7 to 12

#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)  // Jumpers: 8 to 11, 7 to 12
#endif


void main() {

   int i, value, min, max;

   printf("Sampling:");

   setup_port_a( ALL_ANALOG );
   setup_adc( ADC_CLOCK_INTERNAL );
   set_adc_channel( 0 );

   do {
      min=255;
      max=0;
      for(i=0; i<=30; ++i) {
         delay_ms(100);
         value = Read_ADC();
         if(value<min)
            min=value;
         if(value>max)
            max=value;
      }
      printf("\n\rMin: %2X  Max: %2X\n\r",min,max);

   } while (TRUE);
}