c - PIC16F1459带DTMF芯片的电话拨号环路问题(C语言编写)

Question

我目前正在做一项作业，当按下白板上的按钮时将调用一个电话号码。目前我的电话正在调用我选择的号码，但是他们是一个接一个地拨，而不是按下按钮时拨。我的循环中是否缺少一些真正基本的东西？

/* 
 * File:   assignment5.c
 *
 */
// CONFIG1
#pragma config FOSC = INTOSC // Oscillator Selection Bits (INTOSC oscillator: I/O function on CLKIN pin)
#pragma config WDTE = OFF // Watchdog Timer Enable (WDT disabled)
#pragma config PWRTE = OFF // Power-up Timer Enable (PWRT disabled)
#pragma config MCLRE = ON // MCLR Pin Function Select (MCLR/VPP pin function is MCLR)
#pragma config CP = OFF // Flash Program Memory Code Protection (Program memory code protection is disabled)
#pragma config BOREN = ON // Brown-out Reset Enable (Brown-out Reset enabled)
#pragma config CLKOUTEN = OFF // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin)
#pragma config IESO = OFF // Internal/External Switchover Mode (Internal/External Switchover Mode is disabled)
#pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is disabled)
// CONFIG2
#pragma config WRT = ALL // Flash Memory Self-Write Protection (000h to 1FFFh write protected, no addresses may be modified by PMCON control)
#pragma config CPUDIV = CLKDIV6 // CPU System Clock Selection Bit (CPU system clock divided by 6)
#pragma config USBLSCLK = 48MHz // USB Low SPeed Clock Selection bit (System clock expects 48 MHz, FS/LS USB CLKENs divide-by is set to 8.)
#pragma config PLLMULT = 3x // PLL Multipler Selection Bit (3x Output Frequency Selected)
#pragma config PLLEN = DISABLED // PLL Enable Bit (3x or 4x PLL Disabled)
#pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset)
#pragma config BORV = LO // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
#pragma config LPBOR = OFF // Low-Power Brown Out Reset (Low-Power BOR is disabled)
#pragma config LVP = OFF // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming)

#include <stdio.h>
#include <stdlib.h>
#include <xc.h>

#define _XTAL_FREQ 4000000
#include <stdio.h>
#include <stdlib.h>

/*
 * 
 */


void pulse(void){
                  RC6 = 0;  //drop clock
                  __delay_us(5);
                  RC6 = 1;
                  __delay_us(5);
}

void tone_0(){
      char i;

      RC7 =0;  //data low
      pulse();
      RC7 =1;
      pulse();
      RC7 =0;
      pulse();
      RC7 =1;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
     // RC7 = 1;
      //for (i = 0;i<5;i++)
         // pulse();
      //__delay_ms(195);
}
void tone_1(){
      char i;

      RC7 =1;  //data low
      pulse();
      RC7 =0;
      pulse();
      RC7 =0;
      pulse();
      RC7 =0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
     // RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_2(){
      char i;

      RC7 = 0;  //data low
      pulse();
      RC7 = 1;
      pulse();
      RC7 =0;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_3(){
      char i;

      RC7 =1;  //data low
      pulse();
      RC7 =1;
      pulse();
      RC7 =0;
      pulse();
      RC7 =0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
         // pulse();
      //__delay_ms(195);
}
void tone_4(){
      char i;

      RC7 = 0;  //data low
      pulse();
      RC7 =0;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
     // RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_5(){
      char i;

      RC7 =1;  //data low
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
         // pulse();
      //__delay_ms(195);
}
void tone_6(){
      char i;

      RC7 = 0;  //data low
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_7(){
      char i;

      RC7 = 1;  //data low
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_8(){
      char i;

      RC7 = 0;  //data low
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
void tone_9(){
      char i;

      RC7 = 1;  //data low
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 0;
      pulse();
      RC7 = 1;
      pulse();
      RC7 = 0;
      pulse();
      __delay_ms(195);
      //RC7 = 1;
      //for (i = 0;i<5;i++)
          //pulse();
      //__delay_ms(195);
}
char dial(char i)
{
    if(i == 0)
        {
            tone_6();
    }
    if(i == 1)
        {
            tone_7();
    }
    if(i == 2)
        {
            tone_3();
    }
    if(i == 3)
        {
            tone_3();
    }
    if(i == 4)
        {
            tone_8();
    }
    if(i == 5)
        {
            tone_6();
    }
    if(i == 6)
        {
            tone_9();
    }
    i++;
    if(i > 6)
        i = 0;
    return i;


}
 void main(){
                  char i = 0;
                  char buttontoggle = 0;
                  char count = 0;
                                    __delay_ms(190);

                                    OSCCON =0b00110100;
                                    TRISC = 0;
                                    ANSELC = 0;
                                    TRISA = 0b11111111;
                                    WPUB6 = 1;

                                    PORTC = 0b10000100;  //clock high, data high, CE high
                                    __delay_ms(10);
                                     RC2 = 0;  //turn it on.
                                    __delay_ms(10);
             while(1)
             {

        if(RB6 == 0 )
                {
                    buttontoggle = 0;
        }
        if(RB6 == 1)
                {
                    buttontoggle = 1;
        }
                if( buttontoggle == 1)
                {
                    count = dial(count);
                }

         }

/*while (1){

                                    RC2 = 0;  //turn it on.
                                    __delay_ms(50);
                                    RC7 =1;  //data low
                                    pulse();
                                    RC7 =0;
                                    pulse();
                                    RC7 =0;
                                    pulse();
                                    RC7 =1;
                                    pulse();
                                    RC7 = 0;
                                    pulse();
                                    __delay_ms(195);
                                    RC7 = 1;
                                    for (i = 0;i<5;i++)       pulse();
                                    __delay_ms(195);
                                    RC2 =1;
        }*/
}

Answer 1

也许您需要查看硬件。您尚未设置端口 B，但我们假设它是一个输入。 RB6 的值(value)会一直走低吗？

如果 RB6 设置正确，只要按下按钮，此代码就会连续调用您的号码(即没有退出)。

您的拨号例程(正在请求 case 语句!)也在自修改参数 i 并返回它，然后您将返回值分配给调用参数 (count)。这有点令人费解，可能会导致奇怪的行为。