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HCS12X port and portENABLE_INTERRUPTS()Posted by Sergey on May 24, 2012 Hi All. I use 3 ISR: ECT for system tick counter, CAN and PIT timer. I set priority: PIT timer is 7 ( highest ), CAN is 6, ECT is 5 ( lowest ). I want something to FreeRTOS don`t disable global interrupt, macros portENABLE_INTERRUPTS() I do empty. After that, the program stops working, it crash. Why? Ыo you can not do at all? Best regards, Sergey. RE: HCS12X port and portENABLE_INTERRUPTS()Posted by Richard on May 24, 2012 As far as I recall, the HCS12 port does not support nested interrupts. RE: HCS12X port and portENABLE_INTERRUPTS()Posted by Erich Styger on May 24, 2012 HCS12 only has one interrupt inhibit bit, so no nested interrupts. You *could* re-enable interrupts in the ISR, but this will enable *all* interrupts. To the extend that even a lower priority interrupt can occur. That's usually not what you want. So indeed: nested interrupts for HCS12 is not supported (by the hardware, and by the port). RE: HCS12X port and portENABLE_INTERRUPTS()Posted by Sergey on May 24, 2012 Sory, I are confused. Must be portDISABLE_INTERRUPTS() is empty. In general, both are not used. Best regards, Sergey. RE: HCS12X port and portENABLE_INTERRUPTS()Posted by Sergey on May 24, 2012 The problem is that in highest priority PIT timer ISR managed hardware with period 25 us. If I disabled global interrupt I get a bid jitter. This is critical for my application. Sergey.
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