ioport: Aded a way to specify the output value via IRQ

Adding 0x100 to the IRQ value simulates a pin output change
and not just a pin input change.

Signed-off-by: Michel Pollet <buserror@gmail.com>

diff --git a/simavr/sim/avr_ioport.c b/simavr/sim/avr_ioport.c
index 32cf5f9..2aed5e3 100644 (file)
--- a/simavr/sim/avr_ioport.c
+++ b/simavr/sim/avr_ioport.c
@@ -69,11 +69,17 @@ void avr_ioport_irq_notify(struct avr_irq_t * irq, uint32_t value, void * param)
        avr_ioport_t * p = (avr_ioport_t *)param;
        avr_t * avr = p->io.avr;
 
+       int output = value & 0x100;
+       value &= 0xff;
        uint8_t mask = 1 << irq->irq;
                // set the real PIN bit. ddr doesn't matter here as it's masked when read.
        avr->data[p->r_pin] &= ~mask;
        if (value)
                avr->data[p->r_pin] |= mask;
+
+       if (output)     // if the IRQ was marked as Output, also do the IO write
+               avr_ioport_write(avr, p->r_port, (avr->data[p->r_port] & ~mask) | (value ? mask : 0), p);
+
        if (p->r_pcint) {
                // if the pcint bit is on, try to raise it
                int raise = avr->data[p->r_pcint] & mask;