initial commit, compiles for ATTINY84 with TX on PA5 and RX on PA6

main.c

@@ -0,0 +1,22 @@
+#define SUART_TXD
+#define SUART_RXD
+
+#include <avr/interrupt.h>
+#include "suart.h"
+
+
+int
+main(void)
+{
+        sei();
+        uart_init();
+        char c;
+
+// not there yet, for now only echo
+//        uart_puts("Hello Parrot!\n");
+
+        while (1) {
+                c = uart_getc_wait();
+                uart_putc(c);
+        }
+}