From: Michel Pollet <buserror@gmail.com>
Date: Tue, 31 Aug 2010 10:55:29 +0000 (+0100)
Subject: ioport: Added an IRQ for the port pin direction changes
X-Git-Tag: v1.0a5~1
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=2a64138243a89df06b0f6ab4c9ce47f130af53d9;p=sx%2Fsimavr.git

ioport: Added an IRQ for the port pin direction changes

New IRQ for client code (ie "board code") will be called
when the AVR firmware changes the DDR register.

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

diff --git a/simavr/sim/avr_ioport.c b/simavr/sim/avr_ioport.c
index be30652..010e62e 100644
--- a/simavr/sim/avr_ioport.c
+++ b/simavr/sim/avr_ioport.c
@@ -64,6 +64,18 @@ static void avr_ioport_pin_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t
 	avr_ioport_write(avr, p->r_port, avr->data[p->r_port] ^ v, param);
 }
 
+/*
+ * This is a the callback for the DDR register. There is nothing much to do here, apart
+ * from triggering an IRQ in case any 'client' code is interested in the information.
+ */
+static void avr_ioport_ddr_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
+{
+	avr_ioport_t * p = (avr_ioport_t *)param;
+
+	avr_raise_irq(p->io.irq + IOPORT_IRQ_DIRECTION_ALL, v);
+	avr_core_watch_write(avr, addr, v);
+}
+
 /*
  * this is our "main" pin change callback, it can be triggered by either the
  * AVR code, or any external piece of code that see fit to do it.
@@ -172,5 +184,6 @@ void avr_ioport_init(avr_t * avr, avr_ioport_t * p)
 	avr_register_io_write(avr, p->r_port, avr_ioport_write, p);
 	avr_register_io_read(avr, p->r_pin, avr_ioport_read, p);
 	avr_register_io_write(avr, p->r_pin, avr_ioport_pin_write, p);
+	avr_register_io_write(avr, p->r_ddr, avr_ioport_ddr_write, p);
 }
 
diff --git a/simavr/sim/avr_ioport.h b/simavr/sim/avr_ioport.h
index 1fc2ba4..06497e2 100644
--- a/simavr/sim/avr_ioport.h
+++ b/simavr/sim/avr_ioport.h
@@ -29,6 +29,7 @@ enum {
 	IOPORT_IRQ_PIN1,IOPORT_IRQ_PIN2,IOPORT_IRQ_PIN3,IOPORT_IRQ_PIN4,
 	IOPORT_IRQ_PIN5,IOPORT_IRQ_PIN6,IOPORT_IRQ_PIN7,
 	IOPORT_IRQ_PIN_ALL,
+	IOPORT_IRQ_DIRECTION_ALL,
 	IOPORT_IRQ_COUNT
 };