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gertc
Joined: 06 May 2006
Posts: 88
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 Posted: Thu Feb 15, 2018 12:46 am Post subject: Timer0 problem on ATtiny 1634 |
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Hello again,
I realy have problem with the 1634.
I have being using the ATtiny167 without any problem, but I need two additional ports so I am switching to the ATtiny1634
The program does not jump to "Frequency_ab" on Timer0 Interrupts
| Code: |
$regfile = "attiny1634.dat"
$crystal = 8000000
$hwstack = 32
$swstack = 10
$framesize = 40
Config Portb.3 = Output 'PWM Using Timer1
Config Porta.0 = Output '150Hz to 500Hz Square Wave
Dim Pu As Word
'COM PORT
'Open "comb.0:9600,8,n,1" For Output As #1
Config Timer0 = Timer , Prescale = 1
On Timer0 Frequency_ab
Enable Timer0
Start Timer0
Enable Interrupts
Config Timer1 = Pwm , Pwm = 10 , Compare_a_pwm = Clear_up , Prescale = 1
Do
Waitms 1000
Pwm1a = 512 '50% ~4Khz PWM on PORTB.3 (OC1A)
Loop
'
Frequency_ab:
Pu = Pu + 1
'Print #1 , "Pu: " ; Pu
If Pu => 62 Then '62=500Hz 206=150Hz
Pu = 0
Elseif Pu >= 31 Then '31=500Hz 103=150Hz
Porta.0 = 1
Elseif Pu >= 0 Then
Porta.0 = 0
End If
Return
End
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Excatly the same program (Except using different ports) it works fine with ATtiny167
| Code: |
$regfile = "attiny167.dat"
$crystal = 8000000
$hwstack = 32
$swstack = 10
$framesize = 40
Config Portb.0 = Output 'PWM Using Timer1
Config Porta.2 = Output '150Hz to 500Hz Square Wave
Dim Pu As Word
'COM PORT
'Open "coma.0:9600,8,n,1" For Output As #1
Config Timer0 = Timer , Prescale = 1
On Timer0 Frequency_ab
Enable Timer0
Start Timer0
Enable Interrupts
Config Timer1 = Pwm , Pwm = 10 , Compare_a_pwm = Clear_up , Prescale = 1
Do
Waitms 1000
Pwm1a = 512 '50% ~4Khz PWM on PORTB.0 (OC1AU)
Loop
'
Frequency_ab:
Pu = Pu + 1
'Print #1 , "Pu: " ; Pu
If Pu => 206 Then '62=500Hz 206=150Hz
Pu = 0
Elseif Pu >= 103 Then '31=500Hz 103=150Hz
Porta.2 = 1
Elseif Pu >= 0 Then
Porta.2 = 0
End If
Return
End
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The only different I can see is that all the Timer0 instructions for the ATtiny 1634 are in lover case and black. Timer1 instructions Upper case and red.
Config Timer0 = Timer , Prescale = 1
On Timer0 Frequency_ab
For the Attiny167 both Timer0 and Timer1 instructions are both Upper case and red.
Config TIMER0 = Timer , Prescale = 1
On TIMER0 Frequency_ab
I don't know if that means anything?
Thanks,
gerrysc
(BASCOM-AVR version : 2.0.8.1 ) |
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albertsm
Joined: 09 Apr 2004
Posts: 5925
Location: Holland
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| Posted: Thu Feb 15, 2018 10:13 am Post subject: |
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this is a bug in the START statement. it does not know the T1634 and enables the wrong register.
Instead write TCCR0B=1 for this chip and it should work.
_________________
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gertc
Joined: 06 May 2006
Posts: 88
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| Posted: Thu Feb 15, 2018 7:01 pm Post subject: |
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Thanks,
It works. I wounder why the T167 is giving me a 500Hz square wave and the T1634 only a 314Hz square wave? Both are using 8Mhz internal clock
Here is how I am using the Tccr0b. Not quite sure if it is correct.
| Code: |
' Config Timer0 = Timer , Prescale = 1
On Timer0 Frequency_ab
Enable Timer0
Start Timer0
Tccr0b = 1
Enable Interrupts
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Best regards,
gerrysc |
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