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

From John Speth <johnspeth@yahoo.com>
Newsgroups comp.arch.embedded
Subject Re: A timer driver for Cortex-M0+... it rarely doesn't work
Date 2017-04-26 17:17 -0700
Organization Aioe.org NNTP Server
Message-ID <odrdal$1vtf$1@gioia.aioe.org> (permalink)
References <odr8bp$op3$1@dont-email.me>

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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.

It sounds like you have a concurrent access problem that you need to 
protect against.  If it was me, I'd disable interrupts instead of your 
trick.

JJS

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Thread

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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