| View previous topic :: View next topic |
| Author |
Message |
Ahmed
Joined: 07 Mar 2006
Posts: 19
|
| Flexible Keypad Driver |
 Posted: Mon Mar 13, 2006 3:48 pm |
 |
|
This is a modification of CCS keypad driver (KBDD.c) with flexible pins connections.
| 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 col0 PIN_E1
#define col1 PIN_A5
#define col2 PIN_C0
#define row0 PIN_E0
#define row1 PIN_C2
#define row2 PIN_C1
#define row3 PIN_E2
// Keypad layout:
char const KEYS[4][3] = {{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','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);
break;
case 1 : output_high(col0);
output_low(col1);
output_high(col2);
break;
case 2 : output_high(col0);
output_high(col1);
output_low(col2);
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);
} |
|
|
 |
jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
|
| Anyone can modify this excellent flex code to 4x4 keyboard ? |
| Posted: Thu Oct 05, 2006 7:03 am |
|
|
Anyone can modify this excellent flex code to 4x4 keyboard ?
#device <All_Members>
#include <Thank_you> |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
|
jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
|
| Can you separate this code in "driver" code and &q |
| Posted: Sun Oct 08, 2006 9:02 am |
|
|
Can you separate this code in "driver" code and "main" code
Thanks |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
| Posted: Sun Oct 08, 2006 10:27 am |
|
|
In the link given above, the driver is all the code between the two
dashed lines:
| Code: |
//=======================
// driver code is in here.
//=======================
|
The main() code is above and below the dashed lines. |
|
|
40inD
Joined: 30 Jul 2007
Posts: 112
Location: Moscow, Russia
|
|
| Posted: Wed Aug 01, 2007 3:07 am |
|
|
| I suggest to output_float the "row" pins in the end of scan procedure if you use this driver in interrupt routine. In some cases interrupt works only 1 time w/out this. |
|
|
ankur_rustagi12
Joined: 29 Mar 2009
Posts: 3
|
|
| Posted: Fri Apr 03, 2009 6:31 am |
|
|
I changed the pin config to B0 to B6
but when i am running the above programme it is showing the following
errors:
Warning [361] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 27.5 function declared implicit int
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 27.12 undefined identifier "PIN_C3"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 27.29 undefined identifier "PIN_C4"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 27.46 undefined identifier "PIN_C5"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 27.63 undefined identifier "PIN_C6"
Warning [361] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 47.10 function declared implicit int
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 47.21 undefined identifier "PIN_C0"
Warning [361] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 48.1 function declared implicit int
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 48.13 undefined identifier "PIN_C1"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 49.13 undefined identifier "PIN_C2"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 63.10 undefined identifier "false"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 69.12 undefined identifier "PIN_C3"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 71.17 undefined identifier "PIN_C4"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 73.17 undefined identifier "PIN_C5"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 75.17 undefined identifier "PIN_C6"
Error [192] C:\Documents and Settings\Ankur\Desktop\Ankur\pic\keypad.c; 78.12 undefined identifier "true"
help me out... |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
| Posted: Fri Apr 03, 2009 11:44 am |
|
|
You're using the Hi-Tech C compiler. Code on this forum will not work
with that compiler. Please go to the Hi-Tech forum and use their sample code:
http://forum.htsoft.com/all/ubbthreads.php |
|
|
ankur_rustagi12
Joined: 29 Mar 2009
Posts: 3
|
|
| Posted: Fri Apr 03, 2009 11:03 pm |
|
|
yup..that may be the reason..
So if i uninstall the hi-tech compiler and install ccs compiler and compile in mplab ide environment...then will this program work???...will it work??? |
|
|
Scythe
Joined: 05 Mar 2010
Posts: 5
|
|
| Posted: Fri May 28, 2010 11:31 am |
|
|
| I need to ask something. I read a lot about this code but I understand if you use this library with port_b_pullups(true), you don't need additional resistors for pull up the rows. You can directly connect rows and cols to b port. Am I wrong ? |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
| Posted: Fri May 28, 2010 12:08 pm |
|
|
| That's correct. |
|
|
GabrielVinicios
Joined: 27 May 2011
Posts: 2
|
|
| Posted: Fri Sep 13, 2013 5:28 pm |
|
|
My library for doing this follow below:
| Code: |
/* gv_teclado.c
My library can be used in keypads 3x4 with those numbers:
1 2 3
4 5 6
7 8 9
* 0 #
But you can change those characters the way you want.
EXEMPLE OF USE:
char c;
do{
c=le_teclado();
}while (c=='\0');
The function returns '\0' when no key is pressed.
*/
#define COL1 PIN_B0
#define COL2 PIN_B1
#define COL3 PIN_B2
#define LIN1 PIN_B3
#define LIN2 PIN_B4
#define LIN3 PIN_B5
#define LIN4 PIN_B6
char le_teclado(){
//seleciona coluna1
output_high(COL1);
output_low(COL2);
output_low(COL3);
if (input(LIN1)==1){
return '1';
}
if (input(LIN2)==1){
return '4';
}
if (input(LIN3)==1){
return '7';
}
if (input(LIN4)==1){
return '*';
}
//seleciona coluna2
output_low(COL1);
output_high(COL2);
output_low(COL3);
if (input(LIN1)==1){
return '2';
}
if (input(LIN2)==1){
return '5';
}
if (input(LIN3)==1){
return '8';
}
if (input(LIN4)==1){
return '0';
}
//seleciona coluna3
output_low(COL1);
output_low(COL2);
output_high(COL3);
if (input(LIN1)==1){
return '3';
}
if (input(LIN2)==1){
return '6';
}
if (input(LIN3)==1){
return '9';
}
if (input(LIN4)==1){
return '#';
}
return '\0';
}
|
|
|
|
criss_m
Joined: 09 Mar 2006
Posts: 9
Location: Chile
|
|
| Posted: Tue May 20, 2014 3:02 am |
|
|
Its very strange:
i am trying to use the following pins in a SOIC 18F258:
i use flex LCD in same pins (plus PINC7)
#define COL1 PIN_A0
#define COL2 PIN_A1
#define COL3 PIN_A2
#define LIN1 PIN_C3
#define LIN2 PIN_C4
#define LIN3 PIN_C5
#define LIN4 PIN_C6
LCD seems to work fine , but keypad does not work ...
I tried putting pull up resistors in the rows ... but no luck either...
Any ideas ??? |
|
|
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
