ex_humidity.c

PIC单片机从SPI

/////////////////////////////////////////////////////////////////////////
////                        EX_HUMIDITY.C                            ////
////                                                                 ////
//// This program displays the relative humity, in percent (RH%),    ////
//// read by a Humirel HT3223/HTF3223 Humidity Module.               ////
////                                                                 ////
////  Configure the CCS prototype card as follows:                   ////
////     Insert jumpers from output of POT to pin A0                 ////
////                                                                 ////
////  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 1996,2005 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 <16F877A.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

#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)
#endif

#include <ht3223.c>

void main(void) {
    int8 rh;

    printf("\r\n\nRelative Humidity:\r\n");

    humidity_init();
    enable_interrupts(TRUE);

    while (!humidity_ready()) {}

    while(TRUE) {
        rh=humidity_read();
        printf("\r\n%U%%",rh);
        delay_ms(1000);
    }
}