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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [July 2009 Threads] Sorry,but __disable_irq() does nothing?Posted by francis wang on July 6, 2009 In the FreeRTOS ARM7_LPC2129_Keil_RVDS port, we use
#define portDISABLE_INTERRUPTS()__disable_irq() #define portENABLE_INTERRUPTS()__enable_irq()
but a fact is that __disable_irq() and __enable_irq() can not be called from the user mode.It seems they dont function correctly, the irq is not disabled after call to portDISABLE_INTERRUPTS() or portENABLE_INTERRUPTS(). plz help me about this..
Regards.
wFrancis
RE: Sorry,but __disable_irq() does nothing?Posted by Richard on July 6, 2009 Tasks run in System mode, so the interrupt masks can be accessed.
Regards.
RE: Sorry,but __disable_irq() does nothing?Posted by francis wang on July 6, 2009 Thanks for your kindly reply! However , I found that the watchdog timer not work well with the __disable_irq().It seems that the wdt resets the whole system even if I feed it in the task using __disable_irq() and __enable_irq() to ensure the feed is successful.
void wdtFeed(void) { __disable_irq(); WDFEED = 0xAA; WDFEED = 0x55; __enable_irq(); }
void wdtInit(uint tms) { __disable_irq(); WDTC = (ulong)(tms * configCPU_CLOCK_HZ / 4 / 1000); WDMOD = 0x03; WDFEED = 0xAA; WDFEED = 0x55; __enable_irq(); }
What 's up?Can you guide me?
Regards! wFrancis
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