 |
 |
| View previous topic :: View next topic |
| Author |
Message |
Need-Help
Guest
|
| LCD and Keypad problem |
 Posted: Tue Aug 16, 2005 7:42 am |
 |
|
Hi pro's
my problem is as follows i have the CCS prototyping board Rev 7 which have 2 inserts for LCD and Keypad when i place the Keypad and configure it to port B and LCD to port D, i keep getting this error message "Could not Detect target Chip" , when i remove both LCd and keypad i don't get that error, i m using lcd.c and kbd.c , and i m just trying to run the example program from CCS , by the way i have a 16F877A chip
| Code: | /////////////////////////////////////////////////////////////////////////
//// EX_LCDKB.C ////
//// ////
//// This program uses both the KBD.C and LCD.C drivers to allow ////
//// keypad entry and LCD display. All keys are echoed except * ////
//// that will clear the display. Either the kbd_getc or lcd_putc ////
//// may be replaced with getc or putc to use just one device with ////
//// the RS-232. ////
//// ////
//// Configure the CCS prototype card as follows: ////
//// Plug in both the LCD and KEYPAD. ////
//// ////
//// This example will work with the PCB, PCM and PCH compilers. ////
//// The following conditional compilation lines are used to ////
//// include a valid device for each compiler. Change the device, ////
//// clock and RS232 pins for your hardware if needed. ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////
#if defined(__PCB__)
#include <16c56.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=20000000)
#elif defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOPROTECT,NOLVP
#use delay(clock=20000000)
#endif
#include <lcd.c>
#include <kbd.c>
void main() {
char k;
lcd_init();
kbd_init();
lcd_putc("\fReady...\n");
while (TRUE) {
k=kbd_getc();
if(k!=0)
if(k=='*')
lcd_putc('\f');
else
lcd_putc(k);
}
}
|
i double checked that my Keypad is
| Code: | | #define use_portb_kbd TRUE |
and my LCD is
| Code: | | #define use_portd_lcd TRUE |
i read some threads and the same problem happened with one dude ,, but he wasn't using the CCS prototyping board.
Can anyone help me this thing is driving me crazy
thanks |
|
 |
treitmey
Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA
|
|
| Posted: Tue Aug 16, 2005 8:18 am |
|
|
Sounds to me like one or more of the programming pin are also used for the keypad and/or lcd. You need pgc and pgd for programming,.... and also port
B on the ?keypad?. Check that those wires(pgc and pgd) are wired correct. |
|
|
Need-help
Guest
|
|
| Posted: Tue Aug 16, 2005 8:54 am |
|
|
from CCS schematics which was provided by the manufacter, its states that keypad to Port D and LCD to port B, i ve tried that ,,
again "Could Not Detect target Chip"..!!!! |
|
|
valemike
Guest
|
|
| Posted: Tue Aug 16, 2005 9:11 am |
|
|
Read treitmey's comment.
What is connected to RB6 and RB7?  |
|
|
Guest
|
|
| Posted: Tue Aug 16, 2005 9:15 am |
|
|
| valemike wrote: | Read treitmey's comment.
What is connected to RB6 and RB7? |
// B0 enable
// B1 rs
// B2 rw
// B4 B4
// B5 B5
// B6 B6
// B7 B7 |
|
|
Guest
|
|
| Posted: Tue Aug 16, 2005 9:15 am |
|
|
| Anonymous wrote: | | valemike wrote: | Read treitmey's comment.
What is connected to RB6 and RB7? |
// B0 enable
// B1 rs
// B2 rw
// B4 B4
// B5 B5
// B6 B6
// B7 B7 |
THAT WAS THE lcd CONNECTION |
|
|
valemike
Guest
|
|
| Posted: Tue Aug 16, 2005 9:42 am |
|
|
| Are you using a DIP chip? Try programming it OUT of the socket first, then see if your program runs. Looks like your stuff is disrupting ICSP. |
|
|
Guest
|
|
| Posted: Tue Aug 16, 2005 11:03 am |
|
|
| valemike wrote: | | Are you using a DIP chip? Try programming it OUT of the socket first, then see if your program runs. Looks like your stuff is disrupting ICSP. |
yes its a dip Chip goes on a the board the board looks like this-->[/url]http://www.ccsinfo.com/spb.shtml[url]
i have the LCD to go on LCD port B which is to the right of the pic and the keypad to the bottom ,, unfortunally i don't have an external proto board to try it on,,, do u guys have any other suggestions[/url] |
|
|
Guest
|
|
| Posted: Tue Aug 16, 2005 12:29 pm |
|
|
| No one..????? |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
| Posted: Tue Aug 16, 2005 12:38 pm |
|
|
Download the CCS ICD Trouble-shooting Guide:
http://www.ccsinfo.com/ccs_icd_trblsht.zip
On page 2 of the guide, it says:
To program and/or debug in circuit, two I/O pins (B6, B7) are reserved.
If debugging is not to be done, then these pins may also be used in the
target circuit. However, take care to ensure the target circuit has high
impedance during programming. |
|
|
Guest
|
|
| Posted: Wed Aug 17, 2005 8:22 am |
|
|
thank you ,, now the LCd works since i set it to Port B and download the program to the chip and then connect the LCD and unhook the ICD,,,,
But the keypad does not want to work for some reason i tried to set it to Port D
the kbd.c wasn't edited
| Code: |
// Un-comment the following define to use port B
//#define use_portb_kbd TRUE
// Make sure the port used has pull-up resistors (or the LCD) on
// the column pins
#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
//Keypad connection: (for example column 0 is B2)
// Bx:
#ifdef blue_keypad ///////////////////////////////////// For the 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 ////////////////////////////////////////////////// For the 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)
// 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() {
}
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;
}
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==3)
col=0;
}
}
kbd_call_count=0;
}
set_tris_kbd(ALL_PINS);
return(kchar);
}
|
Any Sugestions..!!!!
Please |
|
|
Guest
|
|
| Posted: Wed Aug 17, 2005 8:22 am |
|
|
thank you ,, now the LCd works since i set it to Port B and download the program to the chip and then connect the LCD and unhook the ICD,,,,
But the keypad does not want to work for some reason i tried to set it to Port D
the kbd.c wasn't edited
| Code: |
// Un-comment the following define to use port B
//#define use_portb_kbd TRUE
// Make sure the port used has pull-up resistors (or the LCD) on
// the column pins
#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
//Keypad connection: (for example column 0 is B2)
// Bx:
#ifdef blue_keypad ///////////////////////////////////// For the 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 ////////////////////////////////////////////////// For the 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)
// 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() {
}
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;
}
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==3)
col=0;
}
}
kbd_call_count=0;
}
set_tris_kbd(ALL_PINS);
return(kchar);
}
|
Any Sugestions..!!!!
Please |
|
|
Guest
|
|
| Posted: Wed Aug 17, 2005 8:27 am |
|
|
thank you (PCM programmer),, now the LCd works since i set it to Port B and download the program to the chip and then connect the LCD and unhook the ICD,,,,
But the keypad does not want to work for some reason i tried to set it to Port D
the kbd.c wasn't edited
| Code: |
// Un-comment the following define to use port B
//#define use_portb_kbd TRUE
// Make sure the port used has pull-up resistors (or the LCD) on
// the column pins
#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
//Keypad connection: (for example column 0 is B2)
// Bx:
#ifdef blue_keypad ///////////////////////////////////// For the 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 ////////////////////////////////////////////////// For the 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)
// 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() {
}
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;
}
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==3)
col=0;
}
}
kbd_call_count=0;
}
set_tris_kbd(ALL_PINS);
return(kchar);
}
|
and then i tried to write a small program to display the keys pressed to HyperTerminal and it doesn't work
| Code: |
#include <16F877A.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#device ICD=TRUE
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
#include <kbd.c>// kbd.c is a Generic keypad scan driver
//to read the numbers on the keypad
void main()
{
char k;
printf("Start\n\r");
while(1)
{
k = kbd_getc();
if(k != 0)
{
if(k == '*')
{
putc('\f');
}
else
{
putc(k);
}
}
}
}
|
Any Sugestions..!!!!
Please |
|
|
PCM programmer
Joined: 06 Sep 2003
Posts: 21708
|
|
| Posted: Wed Aug 17, 2005 9:36 am |
|
|
| Quote: |
But the keypad does not want to work for some reason i tried to set it to
Port D the kbd.c wasn't edited |
Well, if you had registered and logged in and stayed logged in,
you could delete two of those extra posts.
But anyway, the keypad requires pull-ups on the Row pins.
(Not the column pins, as the kbc.c file says).
So just add four 10K pullup resistors and it should work. |
|
|
Almasri
Joined: 17 Aug 2005
Posts: 8
|
|
| Posted: Wed Aug 17, 2005 11:40 am |
|
|
Thank you Mr. PCM Programmer i got an account here, and i guess i ll be cleaner in my threads from now on,,
my question for you is how can i place pull up resistors on the CCS Prototyping Board since the the Keypad is placed in the bottom of the board r you suggesting to get an external protoboard and hook the keypad to it and let the ROW pins connected to the port D using 10K resistors is there an easier way of doing it than getting more hardware,
what does it mean when they say
| Code: | Make sure the port used has pull-up resistors (or the LCD) on
// the column pins |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
