[ECOS] Re: DSR question

["Tim Michals" <t dot michals at attbi dot com>]

Yes, I added it and still have the same issue:
static int
lcd_panel_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters
*regs)
{
    cyg_drv_interrupt_mask(CYGNUM_HAL_INTERRUPT_EINT2);
    cyg_drv_interrupt_acknowledge(CYGNUM_HAL_INTERRUPT_EINT2);
    return (CYG_ISR_CALL_DSR|CYG_ISR_HANDLED);  // Run the DSR
}


>
> All,
>
> Problem:
> When the ISR is invoked several times the OS seems to lock up.  After
> investigation, the OS is running but the DSR loop is not being invoked.
> Used ARM ICE to verify ISR is still being called, but the DSR block stops
> being called. Why would this happen?  I'm sure it is some type of race
> condition.  But, with a simple DSR and ISR how could this happen?
Verified
> that the interrupt is not active.  The interrupt is MASKed off.  Turn the
> interrupt back on via the emulator, the isr is called.   Also, the ISR/DSR
> is being called a number of time, I'm doing a simulation by holding the
> interrupt pin high for several seconds.
>
> Observations:
> The OS is running but any threads that are blocked on timers or any DSR
> calls, they are stopped.  Created a simple thread that just sends messages
> out the port, it never locks up.  Jut the threads blocked on timer, ie
DSR.
>
> Using eCOS version 2.0
>
> Snippet for code:
>
> static int
> lcd_panel_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters
> *regs)
> {
>     cyg_drv_interrupt_mask(CYGNUM_HAL_INTERRUPT_EINT2);
>     cyg_drv_interrupt_acknowledge(CYGNUM_HAL_INTERRUPT_EINT2);
>     return (CYG_ISR_CALL_DSR);  // Run the DSR
> }
>
> // This DSR starts up the touch panel [logical] processing
> static void
> lcd_panel_dsr(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t
data)
> {
>
>     cyg_drv_interrupt_unmask(CYGNUM_HAL_INTERRUPT_EINT2);
> //    cyg_semaphore_post(&lcd_panel_sem);
> }
>


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