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Re: A timer driver for Cortex-M0+... it rarely doesn't work

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>>> First you need to make ticks_high volatile.  It doesn't make any sense
>>> to me why you'd cast it volatile in one execution context but not the
>>> other.  If it's shared between two execution contexts, the compiler
>>> needs to know that.
>
> "volatile" does not mean that a variable is shared between two execution
> contexts - it is neither necessary nor sufficient to make such sharing work.

So true, David.  I noticed that a variable shared between two 
asynchronous execution contexts can benefit by volatile declaration.  I 
would instinctively declare it volatile because it's the right thing to 
do in this case.  It won't solve the OP's problem though.

JJS

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A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 00:55 +0200
  Re: A timer driver for Cortex-M0+... it rarely doesn't work Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-04-26 23:24 +0000
    Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 09:32 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work Jack <jack4747@gmail.com> - 2017-04-27 01:15 -0700
  Re: A timer driver for Cortex-M0+... it rarely doesn't work John Speth <johnspeth@yahoo.com> - 2017-04-26 17:17 -0700
    Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 09:37 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 10:13 +0200
        Re: A timer driver for Cortex-M0+... it rarely doesn't work John Speth <johnspeth@yahoo.com> - 2017-04-27 10:24 -0700
          Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 22:04 +0200
  Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 10:01 +0200
    Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 10:27 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 11:53 +0200
        Re: A timer driver for Cortex-M0+... it rarely doesn't work Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2017-05-01 10:09 +0200
          Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-05-02 09:03 +0200
            Re: A timer driver for Cortex-M0+... it rarely doesn't work Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> - 2017-05-04 10:06 +0200
    Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 11:38 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 12:54 +0200
        Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-27 13:51 +0200
          Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 15:39 +0200
            Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-28 09:24 +0200
              Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-28 11:05 +0200
                Re: A timer driver for Cortex-M0+... it rarely doesn't work pozz <pozzugno@gmail.com> - 2017-04-28 12:18 +0200
                Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-28 13:10 +0200
                ARM developing under Linux [was Re: A timer driver for Cortex-M0+... it rarely doesn't work] pozz <pozzugno@gmail.com> - 2017-05-02 09:14 +0200
                Re: ARM developing under Linux [was Re: A timer driver for Cortex-M0+... it rarely doesn't work] David Brown <david.brown@hesbynett.no> - 2017-05-02 11:34 +0200
                Re: ARM developing under Linux [was Re: A timer driver for Cortex-M0+... it rarely doesn't work] pozz <pozzugno@gmail.com> - 2017-05-03 09:04 +0200
                Re: ARM developing under Linux [was Re: A timer driver for Cortex-M0+... it rarely doesn't work] David Brown <david.brown@hesbynett.no> - 2017-05-03 10:59 +0200
  Re: A timer driver for Cortex-M0+... it rarely doesn't work Dimiter_Popoff <dp@tgi-sci.com> - 2017-04-27 11:02 +0300
    Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 11:06 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work Dimiter_Popoff <dp@tgi-sci.com> - 2017-04-27 14:20 +0300
        Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 16:16 +0200
      Re: A timer driver for Cortex-M0+... it rarely doesn't work Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-04-27 12:03 +0000
        Re: A timer driver for Cortex-M0+... it rarely doesn't work David Brown <david.brown@hesbynett.no> - 2017-04-27 16:18 +0200

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