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Re: at91 SPI driver, use of cyg_drv_dsr_lock()

Gary Thomas wrote: 
cyg_drv_dsr_lock() only prevents DSRs until the thread gives up the CPU
or cyg_drv_dsr_unlock() is called.  In this case, if the thread decides
tp call cyg_drv_cond_wait(), then the DSR lock is dropped.  Once the DSR
runs and signals the condition variable, the thread is resumed - *with*
DSRs locked again.  Once the thread exits the 'while()' loop, the DSR
lock will once again be dropped.

Aaaaah, so the DSR lock-state is really a per-thread state, cool! Thanks Gary

Peter Kooiman




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