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Easya
Joined: 28 May 2014
Posts: 3
Location: Malaysia
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| ERROR for flex_kbd4x4.c |
 Posted: Wed May 28, 2014 10:57 am |
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hai,i'm using keypad 4x4 with pic18f4550.i had been continuously compile this programming, but every time i run it in the pic c compiler,there's always one error detected,& it was the same error again & again.the error was at the "char const KEYS [4][4]=....",the error state,"#DEVICE required before this line".someone,please help me!
| Code: |
///////////////////////////////////////////////////////////////////////////
//// Flex_KBD.C ////
//// Generic keypad scan driver ////
//// ////
//// kbd_init() Must be called before any other function. ////
//// ////
//// c = kbd_getc(c) Will return a key value if pressed or /0 if not ////
//// This function should be called frequently so as ////
//// not to miss a key press. ////
//// ////
///////////////////////////////////////////////////////////////////////////
//Keypad connection:
#define row0 PIN_B4
#define row1 PIN_B5
#define row2 PIN_B6
#define row3 PIN_B7
#define col0 PIN_B0
#define col1 PIN_B1
#define col2 PIN_B2
#define col3 PIN_B3
// Keypad layout:
char const KEYS[4][4] =
{{'7','8','9','/'},
{'4','5','6','X'},
{'1','2','3','-'},
{'*','0','=','+'}};
#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second
void kbd_init()
{
}
short int ALL_ROWS (void)
{
if (input (row0) & input (row1) & input (row2) & input (row3))
return (0);
else
return (1);
}
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 : output_low (col0);
output_high(col1);
output_high(col2);
output_high(col3);
break;
case 1 : output_high(col0);
output_low (col1);
output_high(col2);
output_high(col3);
break;
case 2 : output_high(col0);
output_high(col1);
output_low (col2);
output_high(col3);
break;
case 3 : output_high(col0);
output_high(col1);
output_high(col2);
output_low (col3);
break;
}
if(kbd_down)
{
if(!ALL_ROWS())
{
kbd_down=false;
kchar=last_key;
last_key='\0';
}
} else
{
if(ALL_ROWS())
{
if(!input (row0))
row=0;
else if(!input (row1))
row=1;
else if(!input (row2))
row=2;
else if(!input (row3))
row=3;
last_key =KEYS[row][col];
kbd_down = true;
}
else
{
++col;
if(col==3)
col=0;
}
}
kbd_call_count=0;
}
return(kchar);
} |
_________________
#yehet |
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ezflyr
Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA
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| Posted: Wed May 28, 2014 11:20 am |
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Hi,
Have a look at this thread: http://www.ccsinfo.com/forum/viewtopic.php?t=42707&start=4
Note the order in which things are defined at the top of the program. We can't tell because you didn't post this code, but my guess is that you've got something out of proper order.
John |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19520
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| Posted: Wed May 28, 2014 11:23 am |
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You need a program.....
You have to define your own 'main' program, with processor defines etc., and then 'include' this file.
Look at the CCS examples. Say ex_temp.c. You will see that you have this file, which defines the processor, and then includes the driver for the sensor it uses (ds1621.c). The keyboard file (and almost every other posted driver), needs to be used the same way. They are drivers, not complete programs, and won't compile without suitable 'main' code. |
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Easya
Joined: 28 May 2014
Posts: 3
Location: Malaysia
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| Posted: Wed May 28, 2014 11:27 am |
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| ezflyr wrote: | Hi,
Have a look at this thread: http://www.ccsinfo.com/forum/viewtopic.php?t=42707&start=4
Note the order in which things are defined at the top of the program. We can't tell because you didn't post this code, but my guess is that you've got something out of proper order.
John |
thanks for the quick reply.i'm sorry,i'm such a slow learner.especially in this field...did u mean i have to change the port that i connected with another port for the compatibility?
_________________
#yehet |
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ezflyr
Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA
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| Posted: Wed May 28, 2014 11:35 am |
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Hi,
No, maybe Ttelmah is right; you don't have a program?? I assumed you just didn't post it, but maybe it doesn't exist? Look at the example I posted. That is the "program" which makes use of the keypad "driver". You need both.
John |
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Easya
Joined: 28 May 2014
Posts: 3
Location: Malaysia
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| Posted: Wed May 28, 2014 11:36 am |
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| Ttelmah wrote: | You need a program.....
You have to define your own 'main' program, with processor defines etc., and then 'include' this file.
Look at the CCS examples. Say ex_temp.c. You will see that you have this file, which defines the processor, and then includes the driver for the sensor it uses (ds1621.c). The keyboard file (and almost every other posted driver), needs to be used the same way. They are drivers, not complete programs, and won't compile without suitable 'main' code. |
hai,i'm sorry but i have the program...because i can't run this program, i started to look for the error in the flex file,it turns out that the flex file is for keypad 4x3,then i try to change it to 4x4 keypad,then the error pop out. below are the main program
| Code: |
//Keypad Driver: flex_kbd4x4.c
#define row0 PIN_B4
#define row1 PIN_B5
#define row2 PIN_B6
#define row3 PIN_B7
#define col0 PIN_B0
#define col1 PIN_B1
#define col2 PIN_B2
#define col3 PIN_B3
// Keypad layout:
char const KEYS[4][4] =
{{'7','8','9','/'},
{'4','5','6','X'},
{'1','2','3','-'},
{'*','0','=','+'}};
#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second
void kbd_init()
{
//set_tris_b(0xF0);
//output_b(0xF0);
port_b_pullups(true);
}
short int ALL_ROWS (void)
{
if(input (row0) & input (row1) & input (row2) & input (row3))
return (0);
else
return (1);
}
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:
output_low(col0);
output_high(col1);
output_high(col2);
output_high(col3);
break;
case 1:
output_high(col0);
output_low(col1);
output_high(col2);
output_high(col3);
break;
case 2:
output_high(col0);
output_high(col1);
output_low(col2);
output_high(col3);
break;
case 3:
output_high(col0);
output_high(col1);
output_high(col2);
output_low(col3);
break;
}
if(kbd_down)
{
if(!ALL_ROWS())
{
kbd_down=false;
kchar=last_key;
last_key='\0';
}
}
else
{
if(ALL_ROWS())
{
if(!input (row0))
row=0;
else if(!input (row1))
row=1;
else if(!input (row2))
row=2;
else if(!input (row3))
row=3;
last_key =KEYS[row][col];
kbd_down = true;
}
else
{
++col;
if(col==4)
col=0;
}
}
kbd_call_count=0;
}
return(kchar);
}
//**********************************************************
//Main Program
#include <18F4550.h> // PIC18F4550 HEADER FILE
#fuses XT,NOWDT,NOLVP,NOPROTECT // EXTERNAL CLOCK, NO WATCH DOG TIMER, NO LOW VOLTAGE
#device adc=10 // USE 10 BIT ADC QUANTIZATION
#use delay (clock=4M) // 4 MHZ CRYSTAL
#include <flex_lcd420.c>
#include <flex_kbd4x4.c>
//Main Program
void main()
{
char k;
lcd_init();
kbd_init();
lcd_putc("\fReady...\n");
//Pin Configuration
while(true)
{
//Program start here
k=kbd_getc();
if(k!=0)
if(k=='*')
{
lcd_putc('\f');
delay_ms(100);
lcd_putc("\fReady...\n");
}
else
lcd_putc(k);
}
}
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_________________
#yehet |
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ezflyr
Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA
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| Posted: Wed May 28, 2014 11:39 am |
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Hi,
The problem is that you aren't supposed to include the "driver" code in the main listing like that. You can do it, but the order needs to be correct. So, get rid of the driver code at the top of your listing, and just reference the driver the way you've done with the #include.
John |
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