Hi Jacobo
The M522XX supports Edge Ports (IRQ1..IRQ15, depending on exact part).
In application.c there is a demonstration of its use - see IRQ_TEST. This requires SUPPORT_EPORT to be active in app_hw_m5223x.h
Example of setting up a rising edge interrupt on IRQ4:
INTERRUPT_SETUP interrupt_setup; // interrupt configuration parameters
interrupt_setup.int_type = PORT_INTERRUPT; // identifier when configuring {25} - always initialise
interrupt_setup.int_priority = (INTERRUPT_LEVEL_4); // interrupt priority level (this can not be modified for IRQ1..IRQ7 so the value is not really relevant)
interrupt_setup.int_handler = test_irq_4; // handling function
interrupt_setup.int_port_bit = 4; // the IRQ input connected
interrupt_setup.int_port_sense = IRQ_RISING_EDGE; // interrupt on this edge
fnConfigureInterrupt((void *)&interrupt_setup); // configure test interrupt
The possible interrupt types are:
IRQ_LEVEL_SENSITIVE
IRQ_FALLING_EDGE
IRQ_RISING_EDGE
IRQ_BOTH_EDGES
The user handler is called from the interrupt but doesn't need to handle interrupt handling details. The following shows the define user handler (test_irq_4()) being used to wake the local task due to the edge event, which can then perform further processing 'off-line'
static void test_irq_4(void)
{
fnInterruptMessage(OWN_TASK, IRQ4_EVENT);
}
Regards
Mark
