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Altera_Forum
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14 years ago

Interrupt in uC/OS-II

Hi, I use OSSemPost in my Interrupt ISR as follow: volatile int frame_ready_edge_capture; INT8U error_code; static void handle_frame_ready_interrupts(void* context, alt_u32 id) { /*...
Altera_Forum's avatar
Altera_Forum
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14 years ago

You must write ones, not zeros, in order to clear edge capture and acknowledge the irq.

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(FRAME_READY_IRQ_PIO_BASE, 1);

Otherwise the irq would continuously retrigger.