added more networking routines

include/net_timer.h

@@ -0,0 +1,33 @@
+/*
+ * File:        net_timer.h
+ * Purpose:     Provide a timer use by the dBUG network as a timeout
+ *              indicator
+ *
+ * Notes:
+ */
+
+#ifndef _TIMER_H_
+#define _TIMER_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef struct
+{
+    uint8_t   ch;         /* which channel is this structure for? */
+    uint8_t   lvl;        /* Interrupt level for this channel */
+    uint8_t   pri;        /* Interrupt priority for this channel */
+    uint8_t   reference;  /* timeout indicator */
+    uint32_t  gms;        /* mode select register value */
+    uint16_t  pre;        /* prescale value */
+    uint16_t  cnt;        /* prescaled clocks for timeout */
+} NET_TIMER;
+
+
+extern bool timer_init(uint8_t, uint8_t, uint8_t);
+
+/* Vector numbers for all the timer channels */
+#define TIMER_VECTOR(x)     (126-x)
+
+#endif /* _TIMER_H_ */