ATTINY45 PWM on Port PB4

nobner · Joined: 29 Apr 2015 Posts: 21

Hi,
i'm searching for the correct code, to do a pwm on PB4 (ATTINY45).
This i tried (and much other things) but it doesnt work...

$Regfile="attiny45.dat"
$Crystal=8000000
$hwstack=40
$swstack=16
$framesize=32

config portb.0 = input
config portb.1 = input
config portb.2 = input
config portb.3 = input 'Eingang Taster
config portb.4 = output 'Steuerausgang

Config Timer1 = Pwm , Compare_B_Pwm = Clear_up , Prescale = 8

do 'test für PWM

PWM1B = 125

wait 5

PWM1B = 80

wait 5

loop

end

(BASCOM-AVR version : 2.0.7.8 )

laborratte · Joined: 27 Jul 2005 Posts: 299 Location: Berlin

Seems to be a bug, you should report this to support.

When running your code in simulator, you can see that GTCCR is not set correctly for comparator B output mode. I assume that due to the complete different nature of timer1 in ATTINY45 (in respect to MEGAs) the compiler did not set the registers correctly. [edit: or the compiler assumes that ATTINY15 compatibility mode is used?]

As workaround you should set the registers for your need manually instead of using config timer1 statement.

albertsm · Joined: 09 Apr 2004 Posts: 5926 Location: Holland

The timer 1 was added to a new group for t25/45/85, but some important changes were not made which result in this bug. fixed in 2080.

chris101 · Joined: 01 Sep 2005 Posts: 46

When will this version be released?

Evert :-) · Joined: 18 Feb 2005 Posts: 2158

It's already released, check this http://register.mcselec.com/login.php
You need to download the full setup.

chris101 · Joined: 01 Sep 2005 Posts: 46

Thanks. Not easy to see when the software tells you that the latest version is 2.0.7.8.
How i discover that in the future? The 2.0.8.0 splash screen still says current version is 2.0.7.8 ??

nobner · Joined: 29 Apr 2015 Posts: 21

Hello,
i tried today to get the 2080 as mentioned in the posts before.
But i can only find 2078 as newest update version?
There is also a license file 2079 - is this the newest?

Evert :-) · Joined: 18 Feb 2005 Posts: 2158

You need to download the full setup.