Displaying temperature Setpoints

[Kalind]

there entire device has slowed down. temperature changes used to be instantaneous. going into the different menu's were instantaneous. for some odd reason every has slowed down.

About the amplification, wouldnt it affect the resolution of the measurement?

[mackrackit]

there entire device has slowed down. temperature changes used to be instantaneous. going into the different menu's were instantaneous. for some odd reason every has slowed down.

So when you press a button it takes a bit for anything to happen?

I do not see anything obvious in you code other than it is doing a lot of things now that take time. Takes a little time to get back to the button. To make the buttons react faster you will want to explore interrupts.

About the amplification, wouldnt it affect the resolution of the measurement?

No.
The resolution is controlled by the ADC, 8 or 10 bit, and the VREF (voltage reference)
This link goes to a volt meter
http://rentron.com/serial.htm
but that is all a LM35 is (sort of)
Bruce has a good explanation about how to read a voltage and display it.

[Kalind]

yeah it takes abit longer than before to do stuff. im really concerned as to why this is happening bcause it kinda defeats the purpose of intantaneous measurement. Is there anything you would recommend? Should i maybe try change the oscilator to fosc/32? would that help?

[mackrackit]

Still looking...And it is getting late

What does this part do for you?

getkey:
pause 50
keyin = portc

[Kalind]

provides debounce for buttons connected to portc

[skimask]

Well, since those buttons seemed to work out so well (refer to post #20 and post #34), do you want to humour me a little bit more?

Define LCD_DREG PORTB
Define LCD_DBIT 0
Define LCD_RSREG PORTB
Define LCD_RSBIT 5
Define LCD_EREG PORTB
Define LCD_EBIT 4
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
keyin var byte : adval var word : tempc var word : trisa=1 : trisc=$1f
highled var porta.1 : lowled var porta.2 : adcon1=$f2 : adcon0=$c1
pause 1000 : lcdout $fe,1 : goto main
main: adcon0.2=1 : pause 1
checkadc: highled=1:if adcon0.2 = 1 then checkadc
highled=0:adval.highbyte=adresh : adval.lowbyte=adresl : tempc=(50*adval)/100
pause 50 : keyin = portc : temp = temp + 1 : lowled=temp.3
lcdout $fe,1,"T=",DEC5 tempc,$DF,"C",$fe,$c0,BIN8 keyin : goto main
end

What happens?

[Kalind]

hey guys. i just realised that everything is fine until the actual temperature reaches the respective setpoints. thats when the design starts to really slow down during its operation. i cant seem to understand why this is so.

Refering to post #44

looks like temperature being measured...

keyin = portc : temp = temp + 1 : lowled=temp.3

not sure about that though..

on the lcd will be displayed temperature on the first line and i assuming the binary value of keypressed on line 2