Thanks for your hint. It works fine with cyg_cond_timed_wait() ! But I have not found it in eCos documentation! Is there a newer manual available, which is describing additional API functions?
Richard Richard Rauch email: rra...@itrgmbh.de _______________________________________________ ITR GmbH Informationstechnologie Rauch Schnepfenreuther Hauptstrasse 27b D-90425 Nuernberg phone: +49 (0) 911 3784437 VoIP: +49 (0) 911 495221739 web: http://www.itrgmbh.de email: i...@itrgmbh.de Geschaeftsfuehrer: Richard Rauch Handelsregister: Nuernberg HR B 21676 USt-Id Nr. : DE228051873 _______________________________________________ -----Ursprüngliche Nachricht----- Von: ecos-discuss-ow...@ecos.sourceware.org [mailto:ecos-discuss-ow...@ecos.sourceware.org] Im Auftrag von Sergei Gavrikov Gesendet: Samstag, 28. Mai 2011 19:15 An: Richard Rauch Cc: ecos-discuss@ecos.sourceware.org Betreff: Re: [ECOS] driver development, how to make timeouts? On Sat, 28 May 2011, Richard Rauch wrote: > Hi all, > > How I have to implement a timeout inside an eCos Driver? > > I have following code, which is waiting on an interrupt event: > > cyg_drv_mutex_lock(&(extra->i2c_lock)); > cyg_drv_dsr_lock(); > while (!extra->i2c_completed) { > cyg_drv_cond_wait(&(extra->i2c_wait)); > } > cyg_drv_dsr_unlock(); > cyg_drv_mutex_unlock(&(extra->i2c_lock)); > > > The cyg_drv_cond_wait() never returns, as long as no interrupt occurs. > But in special cases (if the hardware is not wired properly), there > will be never an interrupt. > > How can I break in this function after a while? > > In normal user API, there is a function cyg_cond_timed_wait() which is > able to return in case of timeout. > I haven't found a similar function in driver's kernel API! > > Who knows a solution? Hi, There is such a precedent in io/can/current/src/can.c: 69 #ifdef CYGOPT_IO_CAN_SUPPORT_TIMEOUTS 70 #define CYG_DRV_COND_WAIT(_cond, _time) cyg_cond_timed_wait(_cond, cyg_current_time() + (_time)) 71 #else 72 #define CYG_DRV_COND_WAIT(_cond, _time) cyg_drv_cond_wait(_cond) But, keep in a mind that needs eCos kernel packages: cdl_component CYGOPT_IO_CAN_SUPPORT_TIMEOUTS { display "Support read/write timeouts" flavor bool default_value 0 active_if CYGPKG_KERNEL ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ... HTH Sergei -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
