Add runtime support for the nRF52

src/runtime/print.go

@@ -1,12 +1,9 @@
 
 package runtime
 
-// #include <stdio.h>
-import "C"
-
 func printstring(s string) {
 	for i := 0; i < len(s); i++ {
-		C.putchar(C.int(s[i]))
+		putchar(s[i])
 	}
 }
 
@@ -17,29 +14,30 @@ func printuint(n uint) {
 	if prevdigits != 0 {
 		printuint(prevdigits)
 	}
-	C.putchar(C.int((n % 10) + '0'))
+	putchar(byte((n % 10) + '0'))
 }
 
 func printint(n int) {
 	// Print integer in signed big-endian base-10 notation, for humans to
 	// read.
 	if n < 0 {
-		C.putchar('-')
+		putchar('-')
 		n = -n
 	}
 	printuint(uint(n))
 }
 
 func printbyte(c uint8) {
-	C.putchar(C.int(c))
+	putchar(c)
 }
 
 func printspace() {
-	C.putchar(' ')
+	putchar(' ')
 }
 
 func printnl() {
-	C.putchar('\n')
+	putchar('\r')
+	putchar('\n')
 }
 
 func printitf(msg interface{}) {