Hello,
Yes I did understand he is on RA5 and what he is using each pin for but wouldn't the lack of a pull up also affect the proper operation if he didn't have a high level on RA4?
BobK
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Hello,
Yes I did understand he is on RA5 and what he is using each pin for but wouldn't the lack of a pull up also affect the proper operation if he didn't have a high level on RA4?
BobK
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DOH! No kidding... RSREG is on RA4...duh.........Originally Posted by BobK
BUT...that would also mean that the LCD never worked in the first place.
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That was my thinking, I assumed it was working with the e bit hooked to PortB and he only moved that.
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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There simply is no "Happy Spam" If you do it you will disappear from this forum.
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I havenot yet find the reason why my RA5 connection would not work, but I found an alternative solution by using mister_e's keypad routines to connect my keypad to different ports. Thank you mister_e!
However, I still have a problem:
I have connected my 4x4 keypad to pin 4-7 of PORTB and PORTC and is using the following code to send the keypad output to the LCD:
DEFINE KEYPAD_ROW 4 ' 4 ROW keypad
DEFINE KEYPAD_ROW_PORT PORTC ' ROW port = PORTC
DEFINE KEYPAD_ROW_BIT 4 ' ROW0 = PORTC.4
DEFINE KEYPAD_COL 4 ' 4 COL keypad
DEFINE KEYPAD_COL_PORT PORTB ' COL port = PORTB
DEFINE KEYPAD_COL_BIT 4 ' COL0 = PORTB.4
DEFINE KEYPAD_DEBOUNCEMS 200 ' debounce delay = 200 mSec
DEFINE KEYPAD_AUTOREPEAT 1 ' use auto-repeat feature
PAUSE 500
LCDOUT $FE,1,"Initializing ...."
Pause 1000
INCLUDE "KeyPad.bas"
start:
@ READKEYPAD _myvar
lcdout $fe,1
lcdout " Key Value = ",DEC2 myvar
GOTO start
If I press a key on the keypad, then the correct key value is displayed, thus I know my keypad is connected right and working, BUT while no key is pressed on the keypad, different key values are being displayed as if a key was pressed, e.g. key value = 20, 13, 20, 05, 20, 09 .......
Every second value is a 20?
Why is this happening and how can I get rid of key values being read while no key was pressed?
Thanks for the help thusfar!
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mmm sounds like you miss to install the Pull-up resistors?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Steve
I have 270 ohm resistors on the 4 PORTC pins.
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Between the i/o and VCC?
EDIT:::: MIIP they have to be connected on PORTB, between i/o and VCC.
EDIT2:::: You could also try to use those internal...
Code:OPTION_REG.7=
Last edited by mister_e; - 12th June 2007 at 21:49.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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