Makefile: Fix git tag issues

[simavr] / simavr / sim / avr_ioport.h

diff --git a/simavr/sim/avr_ioport.h b/simavr/sim/avr_ioport.h
index fe583a1..c6f5a4b 100644 (file)
--- a/simavr/sim/avr_ioport.h
+++ b/simavr/sim/avr_ioport.h
@@ -22,6 +22,10 @@
 #ifndef __AVR_IOPORT_H__
 #define __AVR_IOPORT_H__
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "sim_avr.h"
 
 enum {
@@ -29,12 +33,55 @@ 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
 };
 
+#define AVR_IOPORT_OUTPUT 0x100
+
 // add port name (uppercase) to get the real IRQ
 #define AVR_IOCTL_IOPORT_GETIRQ(_name) AVR_IOCTL_DEF('i','o','g',(_name))
 
+
+// this ioctl takes a avr_regbit_t, compares the register address
+// to PORT/PIN/DDR and return the corresponding IRQ(s) if it matches
+typedef struct avr_ioport_getirq_t {
+       avr_regbit_t bit;       // bit wanted
+       avr_irq_t * irq[8];     // result, terminated by NULL if < 8
+} avr_ioport_getirq_t;
+
+#define AVR_IOCTL_IOPORT_GETIRQ_REGBIT AVR_IOCTL_DEF('i','o','g','r')
+
+/*
+ * ioctl used to get a port state.
+ *
+ * for (int i = 'A'; i <= 'F'; i++) {
+ *     avr_ioport_state_t state;
+ *     if (avr_ioctl(AVR_IOCTL_IOPORT_GETSTATE(i), &state) == 0)
+ *             printf("PORT%c %02x DDR %02x PIN %02x\n",
+ *                     state.name, state.port, state.ddr, state.pin);
+ * }
+ */
+typedef struct avr_ioport_state_t {
+       unsigned long name : 7,
+               port : 8, ddr : 8, pin : 8;
+} avr_ioport_state_t;
+
+// add port name (uppercase) to get the port state
+#define AVR_IOCTL_IOPORT_GETSTATE(_name) AVR_IOCTL_DEF('i','o','s',(_name))
+
+/**
+ * pin structure
+ */
+typedef struct avr_iopin_t {
+       uint16_t port : 8;                      ///< port e.g. 'B'
+       uint16_t pin : 8;               ///< pin number
+} avr_iopin_t;
+#define AVR_IOPIN(_port, _pin) { .port = _port, .pin = _pin }
+
+/*
+ * Definition for an IO port
+ */
 typedef struct avr_ioport_t {
        avr_io_t        io;
        char name;
@@ -49,4 +96,8 @@ typedef struct avr_ioport_t {
 void avr_ioport_init(avr_t * avr, avr_ioport_t * port);
 
 
+#ifdef __cplusplus
+};
+#endif
+
 #endif /* __AVR_IOPORT_H__ */