我有个新问题我还在学习PIC（xc 8编译器）的C语言，作为一个初学者，我正在用流行的ds18b20和我身边的pic 16 f628做一个温度计。我的程序在允许运行的情况下确实表现良好，但当我在玩指针，结构，数组等时。在一个函数中返回多个值，我注意到有些东西出了问题，现在PC来回运行，不允许程序顺序运行，至少这是我在mplabx中使用模拟器时看到的。我很确定我忘记了一些关于程序和/或内存位置的东西，但我不知道是什么或为什么。有人能帮帮我吗我把主代码贴在这里，你还需要什么？

/*
 * File:   termometro.c
 * Author: zakkos 
 * Created on April 18, 2013, 2:20 PM
 *
 * /
/*ESSENTIAL DEFINITIONS*/
#define _XTAL_FREQ 4000000
/*INCLUSIONS*/
#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
#include <lcd.h>
#include <1-wire.h>
/*CONFIG PRAGMA*/
#pragma config BOREN = OFF, CPD = OFF, FOSC = INTOSCIO, MCLRE = OFF, WDTE = OFF, CP = OFF, LVP = OFF, PWRTE = ON

//typedef unsigned char uint8_t;

void read_temp(void);

union {
    char eratura;
    char decimali;
}temps;

int main(void) {

    INTCON = 0x00;
    PIE1 = 0x00;

    CMCON = 0x07; //disabilito i comparatori - disable comparators

    TRISA = 0x00;
    PORTA = 0x00;

    TRISB = 0x00;
    PORTB = 0x00;

    const char decims[16] = {0, 0, 1, 1, 2, 3, 3, 4, 5, 5, 6, 6, 7, 8, 8, 9};
    char temp;

    lcd_init();
    lcd_send_cmd(LCD_CLR);
    lcd_send_cmd(LCD_HOME);
    writeString("Hello,");
    lcd_send_cmd(LCD_LN2);
    writeString("World!");
    __delay_ms(1000);
    while(1)
    {
        read_temp();
        lcd_send_cmd(LCD_CLR);
        lcd_send_cmd(LCD_HOME);
        writeString("Temp:");
        lcd_send_cmd(LCD_LN2);
        if((temps.eratura & 0x80)){                             //if sign bit is set
                temps.eratura = ~temps.eratura;                 //2's complement
                temps.eratura += 1;                             
                temps.decimali = ~temps.decimali;               //2's complement
                temps.decimali += 1;
                lcd_send_dat(0x2D);                             //minus
        }
        temp = (temps.eratura/100)& 0x0F;                       //centinaia 157/100=1 (hundreds)
        if(temp){
            lcd_send_dat(0x30 | temp);
            temp = ((temps.eratura/10)%10) & 0x0F;              //decine    157/10=15%10=5 (tens if hundreds is set, meaning it will display also a 0)
            lcd_send_dat(0x30 | temp);
        } else {
            temp = ((temps.eratura/10)%10) & 0x0F;              //decine    157/10=15%10=5 (tens if hundreds is no set, meaning it will not display if 0)
            if(temp){lcd_send_dat(0x30 | temp);
            }
        }
        lcd_send_dat(0x30 | (temps.eratura%10)& 0x0F);          //unita     157%10=7 (ones)
        lcd_send_dat(0x2E);                                     //dot
        lcd_send_dat(0x30 | decims[temps.decimali] & 0x0F);     //decimals
        lcd_send_dat(0xDF);                                     //degrees
 }
}

void read_temp(void){
    char scratchpad[9];
    while(ow_reset());
    ow_write_byte(0xCC);
    ow_write_byte(0x44);
    while(ow_read_bit()==0);
    __delay_ms(1);
    while(ow_reset());
    ow_write_byte(0xCC);
    ow_write_byte(0xBE);
    for(char k=0;k<10;k++){
        scratchpad[k] = ow_read_byte();
    }
    temps.decimali = scratchpad[0] & 0x0F;
    temps.eratura = (scratchpad[1] << 4)|(scratchpad[0] >> 4);
    return;
}

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