Comparison on Singles..

naseerak · Joined: 08 Nov 2008 Posts: 138

In my code I am using this..

If C1v >= 4.20 Then
Set Portc.0
C1_chg_flag = 1
Else

C1_chg_flag = 0
End If

working fine in proteus but not working in real hardware, I have tested the relays driven by ULN2803 and are working by switching the port individual pins. JTAG is disabled in the code.
Config Aci = Off ' comparator off
Mcusr = &H80 ' jtag disabled.

I have also made sure to disable jtag in programmer (USBASP) using eXtreme Burner - AVR.
regrds..

(BASCOM-AVR version : 2.0.7.8 )

bzijlstra · Posted: Thu Sep 17, 2015 6:55 pm Post subject: Reset portc.0

Should there be not a reset portc.0

You are just changing a variable now.

My 2 cents
Ben Zijlstra

naseerak · Joined: 08 Nov 2008 Posts: 138

Reset will start again charging, this according to the relay points....

bzijlstra · Posted: Fri Sep 18, 2015 11:55 am Post subject: Dim?

If this is all the information we get I doubt if we can help you.
What about how you have dimensioned the used variables?

Ben Zijlstra

naseerak · Joined: 08 Nov 2008 Posts: 138

Ddrc = &B11111111
Dim C1raw As Word
Dim C1v As Single

DO
C1raw = Getadc(0)
C1v = C1raw
C1v = C1v * 5 ' to adjust it according to the measured voltage on aref pin
C1v = C1v / 1024

If C1v >= 4.20 Then
Set Portc.0
End If

If C1v <4.20 Then
reset Portc.0
End If
loop
end

This is the snnipet of te code.
regards.

bzijlstra

Could you show us your config adc line and what microcontroller you are using. I have put your example in the simulator and it works. The adc value should be between 860 and 861 to activate the relay.

Have you checked the adc value with a print?

Have fun
Ben Zijlstra

Evert :-) · Joined: 18 Feb 2005 Posts: 2156

and what about your stack setting?

naseerak · Joined: 08 Nov 2008 Posts: 138

$regfile = "m16adef.dat"
$crystal = 8000000
$baud = 19200
$hwstack = 128
$swstack = 64
$framesize = 64

'Hardware Configuration ===============================
Config Aci = Off
Config Adc = Single , Prescaler = Auto , Reference = Avcc
Start Adc

As I said working in proteus not in Real HW.
regards

bzijlstra · Posted: Fri Sep 18, 2015 7:39 pm Post subject: Print getadc value

Do you realy got a reading on getadc(0)?

Could you try a print of c1raw after the getadc(0)

Have fun
Ben Zijlstra

bzijlstra · Posted: Fri Sep 18, 2015 7:54 pm Post subject: What about AVCC?

Is AVCC connected to VCC? On the real hardware that is.

Ben Zijlstra

Printpix52 · Joined: 18 Jun 2014 Posts: 282 Location: D.F.

Lacking output configuration .

naseerak · Joined: 08 Nov 2008 Posts: 138

I am getting the voltage but portc.x is not switching..

bzijlstra · Posted: Sat Sep 19, 2015 6:52 am Post subject: Value c1raw?

Would like to see the value from the getadc(0)
Because the program is working in the simulator I would like to see the value of c1raw after the getadc(0)

I hope you connected the source to pin 40 of the atmega16a and that the grounds are connected. That the value of the source is between 0 volt and AVCC.

Ben Zijlstra

Evert :-) · Joined: 18 Feb 2005 Posts: 2156

naseerak · Joined: 08 Nov 2008 Posts: 138

Do you mean JTAG has to do some thing with port switching..
regards.