Re: [Flashforth-devel] Microsecond counter problem, please help

[Laszlo K. <Ko...@ce...>]

Fortunately I do not have 'load' command at all.

Thank you!

Laci

________________________________
From: Stefan <fli...@gm...>
Sent: Saturday, October 30, 2021 7:46 PM
To: fla...@li... <fla...@li...>
Subject: Re: [Flashforth-devel] Microsecond counter problem, please help

Did you check the word 'load'? If it exists, Timer1 is used by the
system-load-counter. For other purposes TCNT1 is 'read only' then.
You could use 'us' (from the 'avr/forth'-subdirectory) to wait for a
specified number of microseconds.

If Timer1 is free for use -> see timertest.fs

greetz bitflipser


Am 30.10.2021 um 04:59 schrieb Mikael Nordman:
> You have the wrong interrupt vector number.
>
> #14 constant TIMER1_OVF_vect
>
> BR Mikael
>
> On 2021-10-29 14:05, Laszlo Kollar wrote:
>> I am newbie in forth and especially MCUs
>> I would like to ask for help.
>> I would like to write a driver for DHT-22 humidity/thermo sensor. It
>> needs measure microsecond resolution changes in pin state, so I wrote a
>> small code in order to count microseconds based on this article:
>> https://www.reddit.com/r/arduino/comments/1q1chr/using_timer1_to_count_clock_cycles/
>>
>>
>> I try to implement it but failed in several various ways.
>> once it looks like stuck in a infinity reset, sometimes no prompt after
>> running, sometimes flood garbage when use 'words' after running the
>> code.
>>
>> What mistake I made in this code?
>> Please help me!
>>
>> Thanks in advance!
>>
>> László Kollár
>>
>> _______________________________________________
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>> Fla...@li...
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>