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How to calculate the duration of a button inserted?
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peachgirl
Guest
How to calculate the duration of a button inserted?
PostPosted: Mon Jun 11, 2007 12:53 pm     Reply with quote
I use KBDD.C in the #examples# for my keyboard, now I have to calculate the duration of a button inserted, I don't know how to do realize it.
peachgirl
Guest
PostPosted: Mon Jun 11, 2007 12:58 pm     Reply with quote
In this case, I use these codes to get a value from keyboard
Code:


int8 getvalue()
{
  int8 value=0;
  do
  {
       value = kbd_getc();   // the function of the KBBD.C
  }while(value==0)

}


I don't konw when it is inserted. but Now I think have to know the duration inserted,

Is there any one can help me?
inservi



Joined: 13 May 2007
Posts: 128

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PostPosted: Mon Jun 11, 2007 2:04 pm     Reply with quote
Hello,

What is the resolution needed ?

If you call kbd_getc() then the resolution will never be better than the time used by kbd_getc().


try some think like that for 13mSec resolution (77em second):
Code:
#use delay(clock=20000000)

#define initSec 77

int8 sec77 ;
int8 sec = 0 ;

#int_TIMER1
void  TIMER1_isr(void) { // 13 ms at 20Mhz
  if (--Sec77 == 0 ) {
    sec77 = initSec ;
    ++sec ;
  }
}




int16 get value() {
  int16 timePushed77sec = 0 ; // time pushed by 77em seconds

  sec = 0 ;
  sec77 = initSec;
  int8 value=0;
  do
  {
       value = kbd_getc();   // the function of the KBBD.C
  }while(value==0)
 
  // Start count now :
  enable_interrupts(INT_TIMER1);
  while (  kbd_getc() != 0 ) ;
  disable_interrupts(INT_TIMER1);
  timePushed77sec = ( (int16)sec * initSec ) + ( initSec - Sec77 ) ;
  // the time is in  now timePushed77sec  with 77em seconds resolution.
 
  return ( timePushed77sec ) ;

}

void main() {

  setup_timer_1(T1_INTERNAL|T1_DIV_BY_1); // 13 ms at 20Mhz
  //enable_interrupts(INT_TIMER1);
  enable_interrupts(GLOBAL);



}

dro.
_________________
in médio virtus
peachgirl
Guest
PostPosted: Tue Jun 12, 2007 6:57 am     Reply with quote
Hello inservi,

I have tried what you said, but the result of the timePushed77sec is always 1. I don't konw why.

I used printf(lcd_putc, "%lu", timePushed77sec); I can't calcute the duration that i pushed a button.

Thank you for your help^!!!!
inservi



Joined: 13 May 2007
Posts: 128

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PostPosted: Wed Jun 13, 2007 3:15 am     Reply with quote
Hello, i tried so
Code:
#define initSec 77

int8 sec77 ;
int8 sec = 0 ;

#int_TIMER1
void  TIMER1_isr(void) { // 13 ms at 20Mhz
  if (--Sec77 == 0 ) {
    sec77 = initSec ;
    ++sec ;
  }
}


int16 getvalue() {
  int16 timePushed77sec = 0 ; // time pushed by 77em seconds

  sec = 0 ;
  sec77 = initSec;
  /*
  int8 value=0;
  do
  {
       value = kbd_getc();   // the function of the KBBD.C
  }while(value==0)
  */
  // Start count now :
  enable_interrupts(INT_TIMER1);
  //while (  kbd_getc() != 0 ) ;
  delay_ms(1500) ;
  disable_interrupts(INT_TIMER1);
  timePushed77sec = ( (int16)sec * initSec ) + ( initSec - Sec77 ) ;
  // the time is in  now timePushed77sec  with 77em seconds resolution.
 
  return ( timePushed77sec ) ;

}


void main()
{
  int16 v1;

  setup_adc_ports(NO_ANALOGS);
  setup_adc(ADC_OFF);
  setup_spi(SPI_SS_DISABLED);
  setup_wdt(WDT_OFF);
  setup_timer_0(RTCC_INTERNAL);
  setup_timer_1(T1_INTERNAL|T1_DIV_BY_1); // 13 ms at 20Mhz
  setup_timer_2(T2_DISABLED,0,1);
  enable_interrupts(GLOBAL);

  v1 = getvalue() ;

  printf("v1 %Lu ", v1);
 
 
}


As you see, i replaced the 'while ( kbd_getc() != 0 )' by 'delay_ms(x)'
With 'delay_ms(500)' i get 39, with 1500, i get 115, with 200, i get 15.

If you get all time 1, it s probably because the function 'kbd_getc() ' is waiting for the button release before return the result or somthink like that ? unfortunately, i do not have keyboard nor 'KBBD.C' then, i can not test more.
Are you sure that you use 'KBBD.C' and not 'KBD.C' ?

You will probably have to modify the 'kbd_getc() ' function.

dro.
_________________
in médio virtus
peachgirl
Guest
PostPosted: Wed Jun 13, 2007 4:02 am     Reply with quote
Hello inservi,

I tried the programme that you give me.

delay_ms(500); ------>I get 24
delay_ms(1500); ------>I get 70
delay_ms(200); ------>I get 10

I am sure the function is KBDD.C
peachgirl
Guest
PostPosted: Wed Jun 13, 2007 4:11 am     Reply with quote
What I want to say is that: if I can use while(kbd_getc() != 0) , its super!but we can't, so I want to know the raison of it. I don't konw if you have some ideas about it? and when you change it to delay_ms(500), what you think?

thanks very much again,

Heuresement vous être là!!!
inservi



Joined: 13 May 2007
Posts: 128

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PostPosted: Wed Jun 13, 2007 8:32 am     Reply with quote
Hello,
Could you send the code KBDD.C ?

C'est un plaisir de vous aider !

dro.
_________________
in médio virtus
peachgirl
Guest
PostPosted: Wed Jun 13, 2007 9:11 am     Reply with quote
Code:

#if defined(__PCH__)
     #if defined use_portb_kbd
     #byte kbd = 0xF81                   // This puts the entire structure   0xF81 est l'adress de PORTB
     #else
     #byte kbd = 0xF83                   // This puts the entire structure  0xF83 est l'adress de PORTD
     #endif


#else
   #if defined use_portb_kbd
   #byte kbd = 6                  // on to port B (at address 6)
   #else
   #byte kbd = 8                 // on to port D (at address 8)
   #endif
#endif


#define set_tris_kbd(x) set_tris_d(x)
   

//Keypad connection:   (for example column 0 is B2)
//                Bx:

#define COL0 (1 << 4)
#define COL1 (1 << 5)
#define COL2 (1 << 6)
#define COL3 (1 << 7)

#define ROW0 (1 << 3)
#define ROW1 (1 << 2)
#define ROW2 (1 << 1)
#define ROW3 (1 <<0>KBD_DEBOUNCE_FACTOR) {
       switch (col) {
         case 0   : set_tris_kbd(ALL_PINS&~COL0);
                    kbd=~COL0&ALL_PINS;
                    break;
         case 1   : set_tris_kbd(ALL_PINS&~COL1);
                    kbd=~COL1&ALL_PINS;
                    break;
         case 2   : set_tris_kbd(ALL_PINS&~COL2);
                    kbd=~COL2&ALL_PINS;
                    break;
         case 3   : set_tris_kbd(ALL_PINS&~COL3);
                    kbd=~COL3&ALL_PINS;
                    break;
       }

     if(kbd_down) {
         if((kbd & (ALL_ROWS))==(ALL_ROWS)) {
           kbd_down=FALSE;
           kchar=last_key;
           last_key='\0';
         }
       }

     else {
          if((kbd & (ALL_ROWS))!=(ALL_ROWS)) {
             if((kbd & ROW0)==0)
               row=0;
             else if((kbd & ROW1)==0)
               row=1;
             else if((kbd & ROW2)==0)
               row=2;
             else if((kbd & ROW3)==0)
               row=3;
             last_key =KEYS[row][col];
             kbd_down = TRUE;
          } else {
             ++col;
             if(col==4)
               col=0;
          }
       }
      kbd_call_count=0;
   }
  set_tris_kbd(ALL_PINS);
  return(kchar);
}
peachgirl
Guest
PostPosted: Wed Jun 13, 2007 9:13 am     Reply with quote
thank you!!!
I have posted my KBDD.C
Guest
PostPosted: Wed Jun 13, 2007 9:31 am     Reply with quote
Do you know how to difine the number of times to call kbd_getc each second? Because I think its because that the pins don't insiste 1, the pin send some impluse(pulse)
peachgirl
Guest
the first part of the code
PostPosted: Thu Jun 14, 2007 1:11 am     Reply with quote
Code:

#if defined(__PCH__)
     #if defined use_portb_kbd
     #byte kbd = 0xF81                   // This puts the entire structure   0xF81 est l'adress de PORTB
     #else
     #byte kbd = 0xF83                   // This puts the entire structure  0xF83 est l'adress de PORTD
     #endif


#else
   #if defined use_portb_kbd
   #byte kbd = 6                  // on to port B (at address 6)
   #else
   #byte kbd = 8                 // on to port D (at address 8)
   #endif
#endif


#define set_tris_kbd(x) set_tris_d(x)
   

//Keypad connection:   (for example column 0 is B2)
//                Bx:

#define COL0 (1 << 4)
#define COL1 (1 << 5)
#define COL2 (1 << 6)
#define COL3 (1 << 7)

#define ROW0 (1 << 3)
#define ROW1 (1 << 2)
#define ROW2 (1 << 1)
#define ROW3 (1 << 0)




#define ALL_ROWS (ROW0|ROW1|ROW2|ROW3)
#define ALL_PINS (ALL_ROWS|COL0|COL1|COL2|COL3)


// Keypad layout:
char const KEYS[4][4]={{'1','2','3','+'},
                         {'4','5','6','-'},
                         {'7','8','9','!'},
                         {'*','0','#','$'}};

#define KBD_DEBOUNCE_FACTOR 33    //
peachgirl
Guest
the second part of the code
PostPosted: Thu Jun 14, 2007 1:12 am     Reply with quote
Code:

void kbd_init() {
}

char kbd_getc( ) {
   static BYTE kbd_call_count;
   static short int kbd_down;
   static char last_key;
   static BYTE col;

   BYTE kchar;
   BYTE row;

   kchar='\0';
   if(++kbd_call_count>KBD_DEBOUNCE_FACTOR) {
       switch (col) {
         case 0   : set_tris_kbd(ALL_PINS&~COL0);
                    kbd=~COL0&ALL_PINS;
                    break;
         case 1   : set_tris_kbd(ALL_PINS&~COL1);
                    kbd=~COL1&ALL_PINS;
                    break;
         case 2   : set_tris_kbd(ALL_PINS&~COL2);
                    kbd=~COL2&ALL_PINS;
                    break;
         case 3   : set_tris_kbd(ALL_PINS&~COL3);
                    kbd=~COL3&ALL_PINS;
                    break;
       }

     if(kbd_down) {
         if((kbd & (ALL_ROWS))==(ALL_ROWS)) {
           kbd_down=FALSE;
           kchar=last_key;
           last_key='\0';
         }
       }

     else {
          if((kbd & (ALL_ROWS))!=(ALL_ROWS)) {
             if((kbd & ROW0)==0)
               row=0;
             else if((kbd & ROW1)==0)
               row=1;
             else if((kbd & ROW2)==0)
               row=2;
             else if((kbd & ROW3)==0)
               row=3;
             last_key =KEYS[row][col];
             kbd_down = TRUE;
          } else {
             ++col;
             if(col==4)
               col=0;
          }
       }
      kbd_call_count=0;
   }
  set_tris_kbd(ALL_PINS);
  return(kchar);
}
inservi



Joined: 13 May 2007
Posts: 128

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PostPosted: Thu Jun 14, 2007 3:13 am     Reply with quote
Hello,

You posted two versions, i assume that the right one is the second one.
I try to modify it then i post the result.

Best regards,
dro.
_________________
in médio virtus
peachgirl
Guest
PostPosted: Thu Jun 14, 2007 3:31 am     Reply with quote
yes; the second
Laughing thank you very much!!!
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