add (not yet fully working - it can only send through uart now) interrupt-driven uart together with "scheduler"

1 files changed, 7 insertions, 0 deletions

diff --git a/io.c b/io.c
index f35fda9..bf9e0e3 100644
--- a/io.c
+++ b/io.c
@@ -17,6 +17,13 @@ void prints(char string[])
     putchar(string[i]);
 }
 
+void error(char string[])
+{
+  prints("ERROR! ");
+  puts(string);
+  while (1);
+}
+
 void printdec(uint32_t number)
 {
   char buf[11];