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Keypad scan driver

 
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ataka



Joined: 19 Oct 2006
Posts: 2

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Keypad scan driver
PostPosted: Thu Nov 16, 2006 3:17 am     Reply with quote
hi..
My problem is:i want to use the keypad driver from ccs but the Rows are conected to Port b(interrupt on change) and the collums to port E(pic 18F452).
The original code :

Code:
#if defined(__PCH__)
#if defined use_portb_kbd
   #byte kbd = 0xF81                   // This puts the entire structure
#else
   #byte kbd = 0xF83                   // This puts the entire structure
#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

#if defined use_portb_kbd
   #define set_tris_kbd(x) set_tris_b(x)
#else
   #define set_tris_kbd(x) set_tris_d(x)
#endif

[code]

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

#ifdef blue_keypad 
#define COL0 (1 << 2)
#define COL1 (1 << 3)
#define COL2 (1 << 6)

#define ROW0 (1 << 4)
#define ROW1 (1 << 7)
#define ROW2 (1 << 1)
#define ROW3 (1 << 5)

#else ///black_
keypad
#define COL0 (1 << 5)
#define COL1 (1 << 6)
#define COL2 (1 << 7)

#define ROW0 (1 << 1)
#define ROW1 (1 << 2)
#define ROW2 (1 << 3)
#define ROW3 (1 << 4)

#endif

#define ALL_ROWS (ROW0|ROW1|ROW2|ROW3)
#define ALL_PINS (ALL_ROWS|COL0|COL1|COL2)[/code]


[b]I want to modify this code but i don't know how? :roll:[/b]
 
[/list]
Humberto



Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata

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PostPosted: Thu Nov 16, 2006 7:17 am     Reply with quote
http://www.ccsinfo.com/forum/viewtopic.php?t=28022&start=14

Humberto
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Nov 16, 2006 1:39 pm     Reply with quote
That link was for a 4x4 keypad. If you want the driver for a 4x3 keypad
it's here:
http://www.ccsinfo.com/forum/viewtopic.php?t=26333
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